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HomeMy WebLinkAboutSE48_2824 2019 Annual Review _ Sconset Geotube ProjectSubmitted to: Nantucket Conservation Commission 2 Bathing Beach Road Nantucket, Massachusetts 02554 Submitted by: Siasconset Beach Preservation Fund P.O. Box 2279 Nantucket, Massachusetts 02584 Prepared by: Epsilon Associates, Inc. 3 Mill & Main Place, Suite 250 Maynard, Massachusetts 01754 March 2, 2020 2019 Annual Review –Sconset Geotextile Tube Project (SE48-2824) Nantucket, MA 21597/Sconset i Annual Review Epsilon Associates, Inc. TABLE OF CONTENTS TABLE OF CONTENTS I EXECUTIVE SUMMARY 1 1.0 Introduction 1 2.0 Key Findings 1 3.0 Monitoring Reports 2 4.0 Summary of Monitoring Results 3 4.1 Sand Delivery 3 4.2 Bluff Monitoring 4 4.3 Shoreline Monitoring 4 4.4 Underwater Video Monitoring 6 4.5 Annual Drainage System Report 6 5.0 Recommended Changes to Monitoring and Mitigation Program 6 5.1 Monitoring Program Adjustments 7 5.2 Mitigation Volume Adjustment 8 ATTACHMENT A MAY 2018 – DECEMEBR 2019 SAND DELIVERY AND CONTRIBUTION REPORT ATTACHMENT B SCONSET BLUFF SEPTEMBER 2019 AERIAL SURVEY REPORT ATTACHMENT C EXCERPT FROM SOUTHEAST NANTUCKET BEACH MONITORING, DECEMBER 2019, 80TH SURVEY REPORT ATTACHMENT D SCONSET BEACH NOVEMBER 2019 UNDERWATER VIDEO SURVEY REPORTS ATTACHMENT E DRAINAGE SYSTEM ANNUAL REPORT 21597/Sconset E-1 Annual Review Epsilon Associates, Inc. EXECUTIVE SUMMARY 1.0 Introduction Pursuant to the Order of Conditions (DEP File No. SE48-2824), the Sconset Beach Preservation Fund (“SBPF”) was authorized to install geotextile tubes at the base of the coastal bluff below 87- 105 Baxter Road, cover the geotubes with a stockpile of sand as mitigation for installing the tubes at the base of the Coastal Bank (i.e. the sand template), vegetate the natural bluff, and install a coastal drainage system (including a catch basin) at 91 Baxter Road (collectively these activities are referred to as the “Project”). The Project was constructed in two phases. The initial phase was constructed in late December 2013 and January 2014 in accordance with an Emergency Certification approval issued by the Nantucket Conservation Commission, and that authorized construction and maintenance of three stacked tier of 45-foot circumference geotextile tubes covered by sand at the base of the eroding Sconset Bluff, regulated as Coastal Bank (“bank”). That geotextile tube installation was approximately 852 feet long located along the toe of the bank from 87-105 Baxter Road. The second phase, constructed in October 2015 through February 2016, included the installation of a fourth tier of geotextile tubes on lots 91-99, intermediate returns, end returns, and a surface runoff drainage system. With the returns included, the total Project length is now 947 feet. As part of the Order of Conditions for the Project, and annual review of the Project is required to review information gathered through the Project’s monitoring and mitigation programs. This Annual Report was prepared to review the existing monitoring data and provided recommended changes to monitoring and mitigation programs for the future. 2.0 Key Findings Significant monitoring has occurred during the greater than 6-year period since the initial construction of the geotextile tubes in late 2013: 21 shoreline surveys, seven underwater video surveys, five wetland wells monitoring events, beach invertebrate monitoring at four locations, four drainage system reports, and aerial surveys of the bluff. SBPF has also regularly submitted work reports describing template re-grading activities. After more than six year of monitoring, there is no indication of adverse effects to adjacent beaches, the nearshore hard bottom environment, the wetlands at the top of the bluff, or beach invertebrates. Following are the key findings from the monitoring data. ♦ The shoreline monitoring data shows that the measured shoreline positions and the rate of shoreline change are similar to historic patterns. There is no indication of accelerated erosion in excess of historical observations in front of or adjacent to the geotubes. ♦ The bluff survey indicates that the mitigation sand template has contributed more than two times more sand (13.8 cubic yards/linear foot/year [cy/lf/yr], although more than this 21597/Sconset E-2 Annual Review Epsilon Associates, Inc. has been delivered to the site) than the unprotected bluff (6.8 cy/lf/yr) over the last six years. ♦ Underwater video surveys show that a productive cobble habitat area is located just offshore from the geotextile tubes, with no indication that this cobble habitat is being adversely affected by the sand mitigation. ♦ The significant mitigation required at Sconset is uniquely conservative. The sand mitigation volume of 22 cy/lr/yr is 1.5-1.8 times the average bank contribution rate. Ten comparable bank and dune protection projects on the Cape & Islands provided mitigation equivalent to the average bank contribution volume; in most cases, the mitigation volume was estimated by multiplying the average annual erosion of the bank or shoreline by the height and length of the shoreline protected and was only required to be placed one time per year. The largest annual sand delivery for those 10 projects is 1,100 cy/yr. If the same method for sand calculation were used for the Sconset project area, a mitigation volume of only 12.0 cy/lf/yr would be required. ♦ The conservative nature of the sand mitigation volume evidenced by the significant volumes of mitigation sand delivered to the sand template and contributed off the sand templated to the littoral drift system. Simply put, the annual volume of sand that is currently required to be placed on the template has exceeded the volume of sand that is typically lost off the and template each year, and this can result in a surplus of sand within the template. If this trend continued, further addition of sand could eventually cover vegetation on the upper portion of the bank, and steepen the access ramps, making equipment access and template regrading difficult or impossible. An adaptive sand management approach of simply refilling the template each year to 22 cy/lf is advocated. 3.0 Monitoring Reports Individual monitoring reports are presented herewith as Attachments A-E: ♦ May 2018 – December 2019 Sand Delivery and Contribution Report (Attachment A) ♦ Sconset Bluff September 2019 Aerial Survey Report (Attachment B) ♦ Excerpt from Southeast Nantucket Beach Monitoring, December 2019, 80th Survey Report (Attachment C) ♦ Sconset Beach November 2019 Underwater Video Survey Report (Attachment D) ♦ Drainage System Annual Report (Attachment E) The following sections provide a summary of each of the referenced monitoring reports. 21597/Sconset E-3 Annual Review Epsilon Associates, Inc. 4.0 Summary of Monitoring Results 4.1 Sand Delivery As presented in Attachment A the “May 2018 – March 2019 Sand Delivery and Contribution Report” (also referred to as the “Sand Report”), the Project incorporates substantial mitigation volume of 22 cy/lf/yr. Given the project’s length of 947 feet, the total annual mitigation volume is 20,834 cy. Table 1 in the Sand Report (Attachment A) summarizes the sand deliveries and Attachment B provides a description of the bluff monitoring results. The aerial survey of the bluff (see Section 4.2 of this Executive Summary below) indicated that not all mitigation sand eroded off the sand template over the winter and that approximately 21,848 cy of sand remained in the template as of September 2019, prior to the additional 11,172 cy delivered in the months following the survey. During the course of the sand year 11,687 cy of sand, or 12.1 cy/lf, were contributed off the sand template and into the littoral drift system. The SBPF proposed to the Commission a more adaptive mitigation approach in previous annual reports, as well as in the Notice of Intent to expand the geotube system (SE48-3115), because the last few years have had lower erosion, leading to a significant portion of the mitigation sand remaining in the sand template. Continuing to place 22 cy/lf/yr on the sand template would cover up the vegetation on the bluff face and steepen the access ramps, making pedestrian or equipment access and template management activities (such as re-grading) more difficult or impossible. During a meeting with the Massachusetts Department of Environmental Protection (“MassDEP”) in early 2017, options for making the sand mitigation volume more adaptive to actual conditions were discussed. MassDEP suggested one option may be to simply refill the template to 22 cy/lf each spring. In this manner, whatever portion of sand that erodes each winter is replaced each year so that a minimum of 22 cy/lf are available each year, prior to the start of the winter storm season. SBPF believes this is a reasonable option that ensures a conservative volume of sand is available while recognizing that actual bluff contribution rates are typically less than 22 cy/lf/yr. As shown in Attachment A, after the February 2019 sand deliveries, an excess volume of 1,014 cy of sand had been placed on the template before an additional 11,172 cy of sand was placed on the template October 2019 through December 2019. This calculation is based on the template mitigation volume of 20,843 cy minus the volume of sand on the template in September 2019, i.e. 21,848 cy (21,848 cy – 20,843 cy = 1,014 cy). As noted in the Sand Report, to satisfy a strict mathematical formula of 22 cy/lf without taking into account the natural variability in the erosion of the unprotected bluff or the height of the existing template, the 22 cy/lf of sand was achieved. The additional 11,172 cy of sand placed in autumn 2019 increased the total sand volume on the template to approximately 33,020 cy which correlates to approximately 34.9 cy/lf. There was a small unknown amount of loss during November and December storms which resulted in minor regrading and re-covering of the geotubes using sand from the top of the template. 21597/Sconset E-4 Annual Review Epsilon Associates, Inc. 4.2 Bluff Monitoring As presented in the “Sconset Bluff September 2019 Aerial Survey Report” included as Attachment B, an aerial survey of Sconset Bluff was performed by AirShark on September 2 and 3, 2019. Unmanned aerial vehicles (“UAV”) were used to survey the bluff face and geotextile tube area. The data from the survey were processed and used to produce a digital surface model (“DSM”) of Sconset Bluff. The survey yielded the following findings: ♦ The results of the 2019 aerial survey were also used to calculate changes in the bluff volume from 2018 to 2019 for those unprotected areas immediately adjacent to the Project (Figure 1 in Attachment B). During review of the updated profile views it was determined that the break in slope between the beach and bluff is best captured by using elevation +12 feet relative to the North American Vertical Datum of 1988 (NAVD 88). Therefore, the change in the bluff volume in these unprotected areas was calculated from the toe of the bluff (elevation +12 MLW) to the top of the bluff. From May 2018 to September 2019 the unprotected areas showed a calculated net accretion, and as described in the 2019 report, this apparent accretion is within the vertical accuracy range of the survey and likely represents no net change. From July 2013 to September 2019, the unprotected areas eroded approximately 41,000 cy. This is equivalent to a distance- weighted average of 6.8 cy/lf/yr. ♦ As of September 2019, the volume of sand in the template was 21,848 cy, which is approximately 23 cy/lf. This volume includes the 12,163 cy delivered in the early portion of the Sand Year. ♦ The Sand Report (Attachment A) and the September survey (Attachment B) show that, of the total volume of sand delivered and placed for the winter storm season approximately 0.5 cy/lf was contributed to the littoral system. ♦ The project has contributed more sand (13.8 cy/lf/yr) than the unprotected bluff (6.8 cy/lf/yr) over the last six years (July 2013 – September 2019). 4.3 Shoreline Monitoring Shoreline monitoring occurs quarterly at 46 profiles located along six miles of shoreline. Each shoreline survey includes information on the change in the position of the shoreline (the Mean Low Water [MLW] line) and the change in volume for each profile. Bathymetry is conducted each spring and fall out to -25 or -35 feet MLW92 or 2,000 to 3,000 feet offshore, whichever is furthest. Adverse impacts from the geotextile tubes would be expected to be the most apparent in the areas immediately adjacent to the geotextile tubes. One of the purposes of the shoreline monitoring is to ensure the long-standing pattern of shoreline retreat in the Project area and immediately adjacent areas is not accelerating due to the presence of the geotextile tubes. To 21597/Sconset E-5 Annual Review Epsilon Associates, Inc. provide a comprehensive assessment, shoreline monitoring also occurs at profiles that were established in the 1990’s farther to the north and south of the geotextile tubes, for a total monitoring distance of approximately six miles. Quarterly reports provide data for all profiles and include plots from nine beach profiles that represent the stretch of beach subject to monitoring, to help visualize long-term trends. These nine profiles include: ♦ Near the south of the monitoring area (Profile 84) ♦ Approximately 1,000 feet and 500 feet south of the geotubes (Profiles 90 and 90.6) ♦ Within the geotube area (Profiles 91, 91.5, and 92) ♦ Approximately 500 feet and 1,000 feet north of the geotubes (Profiles 9.5 and 93) ♦ Near the north end of the monitoring area (Profile S) Shoreline data charts from these nine representative profiles are included in the “Southwest Nantucket Beach Monitoring, December 2019, 80th Quarterly Report” prepared by Woods Hole Group (“WHG”) and previously submitted to the Commission; the charts are reproduced here as Attachment C. General observations derived from the plotted shoreline data included the following: ♦ Each profile depicts periods of shoreline advance and shoreline retreat, demonstrating a high degree of variability on short- and long-term time scales. This high degree of variability, with observed short-term periods of erosion or accretion, suggests that adverse effects from the geotextile tubes could only be reliably determined through years of sustained erosion that deviate from historical observations. ♦ Each profile responds differently on variable time scales. ♦ This variability does not lend itself to fitting a long-term trend line with a high degree of statistical accuracy. ♦ The November 2019 shoreline position in the Project area was generally similar (within about 20 feet) to the shoreline position in the ~2008-2010 timeframe. ♦ The short-term variability shown by surveys since geotube installation in January 2014 is similar to short-term trend variability (~2- to 3-year periods) observed over many years of surveys before the geotubes were installed. Surveyed post-geotube shoreline changes are not materially different from previous observations as related to rates and duration of shoreline change. No accelerated erosion post-geotube installation in excess of historical observations is evident. 21597/Sconset E-6 Annual Review Epsilon Associates, Inc. 4.4 Underwater Video Monitoring As presented in the “Sconset Beach Underwater Video Survey Report” submission, included in Attachment D, on November 14, 2019, CR Environmental, Inc. (“CR”) and Epsilon conducted underwater video surveys offshore from the geotube project site and directly adjacent areas at the base of the bluff from 87-105 Baxter Road. Underwater video data was collected with CR’s portable towed video sled along the transects shown on the figures within Attachment A in the report (See Attachment D). The surveys showed that a productive habitat area is located just offshore from the geotextile tubes, with no indication that such cobble habitat is being covered by mitigation sand. During the underwater video survey in November, 13 invertebrate species, one fish species, and five marine plant and algal species were observed. The dominant biota across all transects included unidentified branching brown algae, unidentified branching red algae, hydroids, barnacles, common slipper shells, bread crumb sponge, sulfur sponge, and hermit crabs. Most of the survey area had a 25-54% cobble coverage, and there is no indication that such habitat is being covered by the mitigation sand. A comparison of the 2019 survey with the two surveys conducted in 2018 and two surveys conducted in 2017 demonstrates that results were broadly consistent and did not indicate loss of cobble habitat due to the Project. As described in the June 2016 report, the volume of the sand template is minimal compared to volume of sand in the littoral system, and natural sand and shoal movements. It is our ongoing recommendation that a reduction in the frequency of underwater video monitoring is warranted, as meaningful data could only be generated in the event that regular monitoring indicates that the sand mitigation template is contributing several times more sand than the unprotected bluff. 4.5 Annual Drainage System Report The function of the stormwater drainage system has been monitored in accordance with the Stormwater Operation and Maintenance Plan. As noted in Attachment E, “The system appears to be functioning as designed, and we do not have any immediate concerns. There is approximately X-inches of accumulated sediment in the base of the catch basin, which is below the threshold for cleaning. We will continue to monitor the system.” 5.0 Recommended Changes to Monitoring and Mitigation Program The Project’s mitigation and monitoring programs were reviewed to determine those types of monitoring that provide the most useful data and value to assess the potential effects from the Project. The recommended changes are the same as presented in the December 2016 Annual Report and are summarized briefly below. 21597/Sconset E-7 Annual Review Epsilon Associates, Inc. 5.1 Monitoring Program Adjustments ♦ Aerial bluff monitoring should occur annually to provide an assessment of bluff volume change in protected and unprotected areas, as well as the volume of sand remaining in the sand template. ♦ Shoreline surveys should be adjusted to collect the most meaningful data. Three years of quarterly surveys have now been completed.  Shoreline monitoring frequency should be changed to a maximum of two times a year. Analysis by WHG included in the December 2016 Annual Report indicates that quarterly sampling and observation does not inform the analysis to any greater degree. Therefore, a survey frequency of two times a year is recommended, consistent with the monitoring suggestions in the MassDEP Beach Nourishment Best Practices Guide (MassDEP, 2007) and recommendations from The National Research Council (National Academy Press, 1995). One survey is recommended in late winter / early spring and the other is recommended in late summer/early fall.  Wading shots should be eliminated from the shoreline surveys. As presented in the December 2016 Annual Report, an analysis of extrapolating the data from 0 to -5 feet MLLW, as opposed to using a rodman to collect the data, shows that associated errors are small (the average difference in the volume of sand estimated for each profile was 1.1 cy/ft, which equates to a 1.4% difference) The surveys can be completed in approximately half the time if there are no wading shots, which would add tremendous flexibility to completing the surveys in timely fashion, and also reduces inherent risks to the survey crew.  Bathymetry monitoring frequency should be changed to once per year. The December 2016 Annual Report described how bathymetry surveys conducted once per year are sufficient to characterize regional morphology. Reducing the total number of bathymetry survey profiles to ~22 that extend no more than 3,000 ft offshore would potentially allow for the survey to be completed in a single calm sea/weather day without sacrificing substantive information. To provide useful data for present and long-term comparisons, the subset of ~22 profiles would include the historic whole number profiles 81 through 99 plus profiles Q, S, and W. Additionally, it is proposed that bathymetry monitoring be re-evaluated annually to assess its continued value. ♦ Underwater video monitoring should only be required once every three years or in the event that regular monitoring indicates that the sand mitigation template is contributing several (3-5) times more sand than the unprotected bluff. 21597/Sconset E-8 Annual Review Epsilon Associates, Inc. ♦ Drainage system reporting. The drainage system monitoring has been conducted for three years. At this time, it is proposed that the Town Director of Public Works monitor the catch basin for maintenance, as is done for other Town catch basins. 5.2 Mitigation Volume Adjustment The mitigation requirement for the Project is to place a minimum of 22 cy/lf/yr annually. As has been noted in previous submissions, the average annual pre-construction bank contribution volume, calculated from 1994-2013, is 12-14.3 cy/lf/yr (depending on bank recession methodology). The conservative volume of 22 cy/lf/yr is 1.5-1.8 times the average pre- construction bank contribution. A review of ten comparable bluff and dune protection projects presented in Attachment B of the December 2016 Annual Report, shows that sand mitigation volumes for other Coastal Bank stabilization projects are mostly based upon average annual erosion of the bluff or shoreline multiplied by the height and length of the shoreline protected. That review demonstrated that the significant sand mitigation volume required at Sconset (equivalent to 1.5-1.8 times the bluff contribution volume) is uniquely conservative. The conservative nature of the sand mitigation volume is evidenced by the fact that significant volumes of mitigation sand are remaining in the sand template at the end of each winter. At the end of the sand year 2018 the volume of sand remaining on the template was 10,200; while at the end of sand year 2017, 17,000 cy remained on the template; and 15,000 cy remained on the template after sand year 2016. SBPF recommends a more adaptive mitigation program, where the full mitigation of 22 cy/lf would be available each year for the winter storm season, but will not be indiscriminately placed annually regardless of how much sand remains in the template. The proposed mitigation plan is to place the full 22 cy/lf in the sand template prior to the start of the storm season each fall. Consistent with current practice, each time the seaward portion of the sand cover washes away as designed during storm events, the sand template will be re-graded (sand from the top will be pushed down) so that the geotextile tubes remain covered and sand is available to the littoral system. Each following year (prior to the start of the storm season), a sufficient volume of sand will be added to refill the sand template to 22 cy/lf/yr, so that 22 cy/lf is always available at the start of each storm season. We believe this mitigation approach will be much more adaptive and will allow the mitigation sand requirement to provide adequate sand to maintain an adequate volume of sand to littoral system. The proposed mitigation approach recognizes that not all of the sand on the template is contributed to the littoral system each year. As noted above, in 2018, which included a particularly intense late-winter storm season, about 10,200 cy of sand remained in the template after the storm season ended, even though the volume of sand contributed from the sand template was higher than the volume of sand contributed from the unprotected bank. The proposed approach avoids increasing the height of the template each year to accommodate another full placement of 22 cy/lf even though ample sand remains, and instead simply refills the san to the 22 cy/lf mark each year. Continuing to increase in height of the sand template each 21597/Sconset E-9 Annual Review Epsilon Associates, Inc. year is not recommended because it covers the existing bank vegetation and steepens the access ramps, making pedestrian and equipment access and template management activities (such as re-grading) more difficult or impossible. Attachment A May 2018 - December 2019 Sand Delivery and Contribution Report May 2018 - December 2019 Sand Delivery and Contribution Report Baxter Road and Sconset Bluff Stabilization Project Nantucket, MA February 2020 Submitted by: Siasconset Beach Preservation Fund PO Box 2279 Nantucket, MA 02584 Prepared by: Epsilon Associates 3 Mill & Main Place, Suite 250 Maynard, MA 01754 In Association with: Cottage + Castle, Inc. 37 Old South Road, Unit #6 Nantucket, MA 02554 21597/Sconset 1 2019 Annual Sand Delivery Report Epsilon Associates, Inc. ANNUAL SAND DELIVERY REPORT 1.0 Introduction The Baxter Road and Sconset Bluff Stabilization Project (the “Project”) was constructed in two phases. The first phase was constructed in late December 2013 and January 2014 under an Emergency Certification approval issued by the Nantucket Conservation Commission. The first phase consisted of the installation of three stacked tiers of 45-foot circumference geotextile tubes at the base of the eroding Sconset Bluff. The geotextile tube installation was approximately 852 feet long and extends along the toe of the bank from 87-105 Baxter Road. The second phase was constructed in October 2015 through February 2016 and includes the installation of a fourth tier of geotextile tubes on lots 91-99, intermediate returns, end returns, and a surface runoff drainage system. With the returns included, the total project length is now 947 feet. The purpose of the annual sand delivery report is to present the sand mitigation volumes and corresponding delivery tickets for each “Sand Year” from April 1 through March 31 of any given year. SBPF has previously submitted detailed Sand Reports for the first five sand years associated with the Project: • November 2013 through March 31, 2014 (referred to as the “2014 Sand Year”) • April 1, 2014 through March 31, 2015 (referred to as the “2015 Sand Year”) • April 1, 2015 through March 31, 2016 (referred to as the “2016 Sand Year”) • April 1, 2016 through January 31, 2018 (referred to as the “2017 Sand Year”) • February 1, 2018 through April 30, 2018 (referred to as the “2018 Sand Year”) This report presents information on sand deliveries during the period from May 1, 2018 through December 31, 2019 (referred to as the “2019 Sand Year”). 2.0 Sand Delivery Requirements The Project incorporates a substantial mitigation volume of 22 cubic yards/linear foot/year[cy/lf/yr]. Given the project’s length of 947 feet, the total annual mitigation volume required is currently 20,834 cy. As required by the Project’s Order of Conditions (SE48-2824), annually in Sept. – Nov. place sand to ensure a substantial volume of sand (10 – 15 cy/lf) is available at the onset of the winter storm season, place additional sand as needed during the winter and if the total volume is not placed before March 1, the balance shall be placed by March 31. Delivery tickets are to be provided annually to document the total volume of sand provided on a yearly basis. 21597/Sconset 2 2019 Annual Sand Delivery Report Epsilon Associates, Inc. 3.0 Volume of Mitigation Sand Delivered The following nine tables document the sand delivery amounts. ♦ Tables 1-2 present a summary of the volume of sand delivered and contributed from December 2013 through December 31, 2019. Table 3 presents a comparison of the volume of sand eroded from the bluff in adjacent unprotected areas from July 2013 – September 2019. ♦ Table 4 presents the volume of sand delivered during the period from December 2013 – March 31, 2014, which includes construction of the initial Project. ♦ Table 5 presents the total volume of mitigation sand delivered during the period from April 1, 2014 – March 31, 2015. ♦ Table 6 presents the total volume of sand delivered during the period from April 1, 2015 – March 31, 2016, which includes supplementary construction of the fourth tier and returns. ♦ Table 7 presents the total volume of sand delivered during the period from April 1, 2016 – January 31, 2018. ♦ Table 8 presents the total volume of sand delivered during the period from February 1, 2018 – April 30, 2018. ♦ Table 9 presents the total volume of sand delivered during the period from May 1, 2018 – December 31, 2019. Each of these tables is discussed in further detail below. 3.1 Table 1. Summary of Sand Delivery Volume Lines 1-4 of Table 1 describe the total volume of sand delivered to the site, and separate this total into the following categories: mitigation sand, sand used on the bluff face, and sand used for construction (inside or behind the geotextile tubes). Neither sand placed on the bluff face nor sand used for construction is counted towards the mitigation requirement. Lines 5-11 of Table 1 provide a summary of the required mitigation volume. The base mitigation volume is determined by multiplying the 22 cy/lf/yr by the Project’s length (Line 5). This volume is then adjusted by subtracting out the surplus sand from the previous year and the amount of sand eroded from the bluff face. The surplus sand is calculated as that sand delivered the previous year that is in excess of the base mitigation requirements and that is still in the sand template at the end of the sand year (see Lines 6-8). The bluff erosion volume accounts for that portion of the bluff face that continued to erode and is discussed further in Section 5.0 below. Lines 13 and 14 of Table 1 presents the final calculation of whether the project’s mitigation requirement was met. Any surplus of sand delivered during one sand year, up to but not in excess 21597/Sconset 3 2019 Annual Sand Delivery Report Epsilon Associates, Inc. of the amount remaining on the sand template on the beginning of the new sand year, is carried forward and counted towards the following year’s requirement. 3.2 Table 2. Summary of Sand Contribution Table 2 presents a summary of the volume on sand contribution for the period from December 2013 – March 31, 2019. Table 2 provides a breakdown of the sand contribution from the sand template, bluff face, construction, and the total contribution. Line 9 of Table 2 provides the total volume of sand contributed during the 2019 Sand Year. Line 10 provides the average sand contribution from December 2013 – March 31, 2019. 3.3 Table 3. Bluff Volume Loss in Unprotected Areas Adjacent to Geotextile Tubes Tables 3a-c present a comparison of the volume of sand eroded from the bluff in adjacent unprotected areas from July 2013 – September 2019. Table 3a provides the bluff volume change during the 2018-2019 Sand Year. During this period the estimate of the annual change in volume from unprotected areas was calculated as -1.2 cy/lf/yr, which signifies accretion, as explained in Section 5.2 below. Table 3b presents the bluff volume loss during the period of July 2013 – May 2018. Table 3c presents the bluff volume loss in the unprotected areas adjacent to the geotextile tubes from July 2013 – September 2019. 3.4 Table 4. Sand Delivery December 2013 – March 31, 2014 Table 4 presents the volume of sand delivered during the period from December 2013 – March 31, 2014, which includes construction of the initial Project. Table 4 provides a detailed breakdown of that portion of sand placed within and behind the geotextile tubes and presents the total volume of mitigation sand placed over, in front of, and at the ends of the geotextile tubes. All delivery tickets for the total volume delivered of 39,204 cy were previously submitted to the Conservation Commission, most recently as part of the 2015 Sand Report. 3.5 Table 5. Sand Delivery April 1, 2014 – March 31, 2015 Table 5 presents the total volume of mitigation sand delivered during the period from April 1, 2014 – March 31, 2015. Three separate deliveries were made over this period of time. All delivery tickets for the total volume of 14,428 cy were submitted as part of the 2015 Sand Report. 3.6 Table 6. Sand Delivery April 1, 2015 – March 31, 2016 Table 6 presents the total volume of sand delivered during the period from April 1, 2015 – March 31, 2016. Table 6 provides a detailed breakdown of the sand delivered for construction, sand delivered for mitigation, and sand delivered to the bluff face. All delivery tickets for the total volume of 22,485 cy delivered during the 2016 Sand year were provided in the 2016 Sand Report, including the 19,066.7cy delivered during the most recent construction period in November, December, and January and the 3,418 cy delivered in April 2015. 3.7 Table 7. Sand Delivery April 1, 2016 – January 31, 2018 Table 7 presents the total volume of sand delivered during the period from April 1, 2016 – January 18, 2018. Deliveries occurred in the latter half of 2016, in May and December 2017, and in January 21597/Sconset 4 2019 Annual Sand Delivery Report Epsilon Associates, Inc. 2018. All delivery tickets for the total volume delivered of 15,138 cy were submitted as part of the 2017 Sand Report. 3.8 Table 8. Sand Delivery February 1, 2018 – April 30, 2018 Table 8 presents the volume of mitigation sand delivered during the period from February 1, 2018 – April 30, 2018. Three separate deliveries were made over this period of time. All delivery tickets for the total volume delivered of 8,152 cy were submitted as part of the 2018 Sand Report. 3.9 Table 9. Sand Delivery from May 1, 2018 – December 31, 2019 Table 9 presents the total volume of sand delivered during the period from May 1, 2018 – December 31, 2019. Deliveries occurred between October 2018 to February 2019, and between October 2019 to December 2019. All delivery tickets for the total volume delivered of 23,335 cy are included with this report. 3.10 Summary Table 1 shows that sand delivery requirements were met during the first three years of the Project1, with a surplus of sand delivered in the Project’s first two years. At the end of the Project’s fourth winter in 2017, SBPF proposed using an adaptive mitigation approach, whereby the sand template was refilled to 22 cy/lf/yr. (This adaptive mitigation approach was discussed with the Commission during the Project’s March 2018 Annual Review and is also described in the 2017 Sand Report). The UAV survey in September 2019 indicated there was approximately 21,848 cy within the template at the time of the survey. An additional 11,172 cy was delivered before December 31, 2019 bringing the total volume within the sand template to be approximately 33,020 cy which correlates to approximately 34.9 cubic yards per linear foot. There was a small unknown amount of loss during November and December storms which resulted in minor regrading and re-covering of the geotubes using sand from the top of the template. 4.0 Annual Aerial Survey of Bluff SBPF contracted AirShark to perform the annual aerial survey of the bluff in September 2019. Airshark is the same firm that previously performed the 2017 and 2018 aerial surveys. A separate report on the aerial survey is attached (the “Sconset Bluff September 2019 Aerial Survey Report” or the “2019 Survey Report”). 5.0 Changes in Bluff Volume Changes in Bluff Volume are also reported in the Sconset Bluff September 2019 Aerial Survey Report. To understand changes in the bluff volume since Project construction, the results of the 2019 survey were compared to the previous aerial surveys of the Project area that were conducted in May 2018, August 2017, and July 2013. The July 2013 survey was conducted about 6 months prior to the installation of the geotextile tubes. 5.1 Changes in Bluff Volume in Adjacent Unprotected Areas The results of the 2019 aerial survey were used to calculate the changes in the bluff volume from 2018 to 2019 for those unprotected areas immediately adjacent to the geotextile tube project (Figure 1). During review of the updated profile views it was determined that the break in slope 21597/Sconset 5 2019 Annual Sand Delivery Report Epsilon Associates, Inc. between beach and bluff is best captured by using elevation +12 feet relative to the North American Vertical Datum of 1988 (NAVD 88).1 Therefore, the change in the bluff volume in these unprotected areas was calculated from the toe of the bluff (elevation +12 feet NAVD 88) to the top of the bluff. ♦ For the north unprotected area, the section of the bluff within 802 feet immediately to the north of the geotextile tubes was used. ♦ For the south unprotected area, the section of bluff within 138 feet immediately to the south of the geotextile tubes was used. Areas farther south than this could not be used because they had coir or jute terraces installed so were not representative of the unprotected bluff. ♦ No areas with a bulge of sand from sand delivery activities at the accessway between 85 and 87 Baxter Road were used in the calculations. In particular, the size of the south unprotected area was reduced in 2019 (i.e. the northern boundary was moved farther south) to account for sand delivery activities and the associated accretion of sand on the bluff face extending farther south in 2019 than in previous years. As shown in Tables 3a-c, this analysis indicates that the unprotected areas immediately adjacent to the geotextile tubes eroded at the following rates: ♦ For the most recent year (May 2018 – September 2019), the unprotected areas showed a calculated net accretion of approximately 1,082 cy (Table 3a). This is equivalent to a distance-weighted average accretion rate of 1.2 cy/lf/yr. As discussed further below, this apparent accretion is within the vertical accuracy range of the survey and likely represents no net change. ♦ For the period from geotextile tube installation to the previous reporting period (July 2013 – May 2018), the unprotected areas eroded approximately 41,000 cy (Table 3b). This is equivalent to a distance-weighted average of 8.1 cy/lf/yr. ♦ For the period from geotextile tube installation to the most recent survey (July 2013 – September 2019), the unprotected areas eroded a distance-weighted average equivalent of 6.8 cy/lf/yr (Table 3c). The 2018-2019 estimate of the annual change of sand volume from unprotected areas was calculated as -1.2 cy/lf/yr, which signifies accretion. However, we do not anticipate any accretion actually occurred on the bluff face in the adjacent unprotected areas. The calculated result presented in Table 3a may either: 1) represent a minor amount of sand accumulating at the toe of the bluff, or 2) represent values that are within the vertical accuracy range of the drone survey. The calculated change in volume correlates to approximately 0.4 feet (12.2 cm) of sand along the 1 The conversion from Mean Low Water 92 to NAVD 88 is -1.88 feet. 21597/Sconset 6 2019 Annual Sand Delivery Report Epsilon Associates, Inc. 940 feet of unprotected bluff. This change most likely reflects no net loss of unprotected bluff face with a minor amount of sand accumulation along the toe of the bluff. This result of no change to bluff face volume on the adjacent areas is consistent with the calm storm season. 5.2 Changes in Bluff Volume Above Geotextile Tubes The 2019 aerial survey was also used to calculate the changes in bluff volume above the geotextile tubes for the most recent year. No significant change in the bluff volume above the geotextile tubes was expected, because this portion of the bluff face is above the reach of storm waves and is also fully vegetated. The change in the bluff volume above the geotubes was calculated as approximately 587 cy of accretion; however, this accretion correlates to approximately 0.37 feet (11.3 cm), which is about the vertical accuracy range of the survey methods. This suggests that the small calculated change in bluff volume is within the vertical accuracy range and that there has been no net change to the bluff face above the template, which is as expected. 6.0 Volume of Sand in Template The volume of sand in the template was calculated by determining the total volume of the template at the time of the 2019 aerial survey and subtracting the known volume of sand within the geotextile tubes and returns located above the beach level. The total volume of sand above the beach level was 33,561 cy and the total volume of sand in the geotubes is 11,713 cy. This yields a sand cover volume in September 2019 of approximately 21,848 cubic yards. This was prior to the delivery of an additional 11,172 cubic yards between October and December 31, 2019, as described in Section 3.10, which results in an estimate of approximately 33,020 cy on the template and which correlates to 34.9 cy/lf for the 947-foot-long-geotube system. Calculations were also performed on that portion of the sand template that is located above the fourth tier. Per the Project’s Order of Conditions, the sand on the top of the fourth tier is not counted as mitigation sand. This volume is calculated as approximately 3,790 cubic yards. It is anticipated that sand on top of the sand template, including sand on top of the fourth tier, will continue to be pushed down to re-cover the geotextile tubes as needed. Therefore, the volume above the fourth tier will become available through time. 7.0 Volume of Sand Contributed to Littoral System Table 2 presents the approximate volume of sand contributed to the littoral system. The amount contributed is that portion of the sand delivered to the site that is no longer in place in the sand template and therefore is deemed to have been contributed to the littoral system. As has been previously noted, the mitigation sand is delivered to the top of the geotextile tubes and then is pushed over to cover the face of the tubes. On an as-needed basis after erosion events, the sand on top of the geotextile tubes is pushed from the top of the tubes to the face of the tubes whenever needed to re-cover exposed geotextile tubes. Table 2 has been prepared to provide a reasonable estimate of how much mitigation sand has entered the littoral system over the past six years. 21597/Sconset 7 2019 Annual Sand Delivery Report Epsilon Associates, Inc. For each of the six sand years (Sand Year 2014, Sand Year 2015, Sand Year 2017, Sand Year 2018, and Sand Year 2019), this estimate was calculated by the following steps shown in Table 2: 1. Beginning with the volume of sand in the sand template at the start of each year (this was estimated in Sand Years 2014 – 2016 and measured in Sand Years 2017 – 2019); 2. Adding the total amount of mitigation sand delivered each year (this is a known amount for each Sand Year); 3. Subtracting the volume of sand in the sand template at the end of each year (this was estimated in Sand years 2014 – 2016 and measured in Sand Years 2017 – 2019); 4. Adding the bluff volume eroded (this is known as a total from 2013 through 2018 and was apportioned to Sand Years 2015 and 2016 as described above in Section 5.1 of the 2017 Sand Report); 5. Adding the volume of sand contributed during construction (this is known from 2013); 6. Determining the total volume of sand contributed (both as a total volume and as a rate expressed in cy/lf/yr), including as an average rate from 2013-2019. A review of Tables 2 and 3a-c indicates that the sand template has consistently contributed more sand than the unprotected bluff to the north and south of the project: ♦ During the first five years, the unprotected bluff contributed an average of 8.1 cy/lf/yr, while the sand template contributed an average of 16.5 cy/lf/yr. ♦ During the most recent year, the unprotected bluff contributed -1.2 cy/lf/yr (this signifies accretion) as discussed above in Section 5.1, it is within the vertical accuracy which represents no net change of unprotected bluff. The sand template contributed 0.5 cy/lf/yr. ♦ Over the nearly six years from July 2013 – September 2019, the unprotected bluff contributed an average of 6.8 cy/lf/yr and the sand template has contributed an average of 13.8 cy/lf/yr (although more than this has been delivered to the site). Tables Line Sand Amounts 12/13-3/31/14 4/1/14-3/31/15 4/1/15-3/31/16 4/1/16-1/31/18 2/1/18-4/30/18 5/15/18-12/31/19 1 Total Volume Delivered for Geotube Construction (See Line 5 in Table 4 and Line 5 in Table 6)12,653 0 2,931 0 0 0 2 Total Volume Delivered for Mitigation (see Tables 4-7)23,951 14,429 15,085 15,138 8,152 23,335 3 Total Volume Delivered to Bluff Face (Not Counted as Mitigation; See Ln 10 in Tbl 4 & Ln 12 in Tbl 6)2,600 0 4,469 0 0 0 4 Total Volume Delivered by Truck (Sum Lines 10-12)39,204 14,429 22,485 15,138 8,152 23,335 5 Required Mitigation Volume (22 cy/lf * Project Length of 852' for 3 tiers, 947' for 4 tiers w/ret.)18,744 18,744 20,834 20,834 20,834 20,834 Surplus Sand From Prior Year 6 Surplus Delivered in Prior Year (From Line 13 in Preceding Column)0 5,207 3,029 -583 -6,278 -18,960 7 Volume on Template at Start of Sand Year 0 5,900 8,500 15,000 17,000 10,200 8 Countable Surplus Present in Sand Template (Line 6; Not to Exceed Line 7)0 5,207 3,029 -583 -6,278 -18,960 9 Volume on Template at End of Sand Year 5,207 8,500 15,000 17,000 10,200 33,020 Bluff Erosion 10 Net Contribution from Erosion of Bluff Face (pre-veg & during 4th tier const.; see Table 6)0 2,138 2,138 0 0 0 11 Adjusted Required Mitigation Volume (Line 5 - Line 8 - Line 10)18,744 11,400 15,667 21,417 27,112 39,794 12 Total Volume Delivered for Mitigation (Line 2 above)23,951 14,429 15,085 15,138 8,152 23,335 13 Mitigation Surplus or Deficit (-) ( Line 12 - Line 11)5,207 3,029 -583 -6,278 -18,960 -16,459 14 Mitigation Surplus or Deficit (-) to Refill Template to 22 CY/LF 755 -10,634 12,186 Table 2. Summary of Sand Contribution in Cubic Yards (CY), December 2013 - March 31, 2019 Line Sand Amounts 12/13-3/31/14 4/1/14-3/31/15 4/1/15-3/31/16 4/1/16-5/31/17 6/1/17-5/14/18 5/15/18-12/31/19 1 Volume on Template at Start of Sand Year (Line 7 in Table 1)0 5,900 8,500 15,000 17,000 10,200 2 Total Volume Delivered for Mitigation (Line 2 in Table 1; Lines 1 and 2 in Table 7)23,951 14,429 15,085 10,550 12,741 23,335 3 Volume on Template at End of Sand Year (Line 9 in Table 1)5,900 8,500 15,000 17,000 10,200 33,020 4 Total Volume Contributed from Sand Template (Line 1 +2 - Line 3)18,051 11,829 8,585 8,550 19,541 515 5 Total Volume Contributed from Sand Template (cy/lf/yr)21.2 13.9 9.1 8.9 20.3 0.5 6 Net Contribution from Erosion of Bluff Face (Line 10 in Table 1)0 2,138 2,138 0 0 0Construction Contribution 7 Contribution from Construction (Line 8 in Table 4)3,707 0 0 0 0 0Total Annual Sand Contribution 8 Total Volume Contributed 21,758 13,966 10,723 8,550 19,541 515 9 Total Volume Contributed in cy/lf/yr 25.5 16.4 11.3 8.9 20.3 0.5 10 Average Sand Contribution from 2013-2019 (cy/lf/yr)13.8 Mitigation Volume Summary Sconset Bluff and Baxter Road Geotextile Tube Project, 87-105 Baxter Road, Nantucket, MA Table 1. Summary of Sand Delivery in Cubic Yards (CY), December 2013-March 31, 2019 Bluff Face Contribution Sand Delivery Summary Base Required Mitigation Volume Mitigation Volume Adjustments Template Sand Contribution Note: 2019 sand template measured in September, 2019. No template re-grading occurred from April 1 - September 2019, so September measurement is representative of March 31 conditions. Page 1 of 10 Line Area Volume Eroded (CY)Length (Feet)Duration (Years)Annual Change (CY/LF/YR) 1 North Unprotected Area -797 802 1.0 -1.0 2 South Unprotected Area -285 138 1.0 -2.1 3 Total Bluff Erosion for Adjacent Unprotected Areas (Distance-weighted average)-1,082 -1.2 Line Area Volume Eroded (CY)Length (Feet)Duration (Years)Annual Change (CY/LF/YR) 1 North Unprotected Area 35,423 802 5.1 8.7 2 South Unprotected Area 5,577 192 5.1 5.7 3 Total Bluff Erosion for Adjacent Unprotected Areas (Distance-weighted average)41,000 8.1 Line Area Volume Eroded (CY)Length (Feet)Duration (Years)Annual Change (CY/LF/YR) 1 North Unprotected Area 35,423 802 6.1 7.3 2 South Unprotected Area 5,577 192 6.1 4.8 3 Total Bluff Erosion for Adjacent Unprotected Areas (Distance-weighted average)41,000 6.8 Table 3a. Bluff Volume Loss in Unprotected Areas Adjacent to Geotextile Tubes, May 15, 2018 - September 2019 Table 3b. Bluff Volume Loss in Unprotected Areas Adjacent to Geotextile Tubes, July 2013 - May 2018 Note: Bluff face accretion is shown in Table 3a for the 2019 Sand Year. As described in the 2019 Sand Delivery and Contribution Report no net change is reported. Therefore a value of 0 was used for the 2019 Sand Year to calculate the 6-year average annual rate change. Table 3c. Bluff Volume Loss in Unprotected Areas Adjacent to Geotextile Tubes, July 2013 - September 2019 Page 2 of 10 Line Sand Delivery Amounts Cubic Yard (CY)/ Linear Foot (LF) Project Length (LF)Total CY 1 Inside Tier 2 Geotube 5 852 3,834 2 Inside Tier 3 Geotube 5 835 3,758 3 Bench Behind Tier 2 Geotube 3 852 2,556 4 Bench Behind Tier 3 Geotube 3 835 2,505 5 Total Sand For Geotube Construction (Sum Lines 1-4)12,653 6 Template on Top 22 852 18,744 7 Template at Ends 1,500 8 Sand Contributed to Littoral System During Construction 3,707 9 Total Mitigation Volume (Sum Lines 6-8)23,951 10 Total Volume Delivered to Bluff Face (Not Counted as Mitigation)2,600 11 Total Sand Delivered (Sum Lines 5, 9, and 10)39,204 Line Sand Delivery Amounts Cubic Yard (CY)/ Linear Foot (LF) Project Length (LF)Total CY 1 April 2014 7.1 852 6,015 2 Jan 2015 5.3 852 4,477 3 Feb 2015 4.6 852 3,936 4 Total Sand Delivered (Sum Lines 1-3)14,429 Geotube Construction Mitigation Volume Bluff Face Volume Total Sand Delivered Table 5. Sand Delivered April 1, 2014 - March 31, 2015 Mitigation Volume Table 4. Sand Delivered December 2013 - March 31, 2014 Page 3 of 10 Line Sand Delivery Amounts Cubic Yard (CY)/ Linear Foot (LF) Project Length (LF)Total CY Fourth Tier (3) 120' long x 45' circumference tubes(1) 75' long x 45' circumference tubeTotal of 435 linear feet Northern Returns (4) 25' long x 30' circumference tubesTotal of 100 linear feet Northern Intermediate Returns(1) 35' long x 30' circumference tube(1) 45' long x 30' circumference tubeTotal of 80 linear feet Southern Returns(1) 65' long x 30' circumference tube(1) 70' long x 30' circumference tube(1) 75' long x 30' circumference tube(1) 80' long x 30' circumference tubeTotal of 290 linear feet Southern Intermediate Returns(1) 35' long x 30' circumference tube(1) 45' long x 30' circumference tubeTotal of 80 linear feet 6 Total Sand For Geotube 4th Tier and Returns Construction (Sum Lines 1-5)2,931 7 November and December 2015 (immediately post-construction)15,085 8 Total Mitigation Volume 15,085 9 Total Volume Delivered to Bluff for Vegetation (April 2015)3,418 10 Total Volume Delivered to Bluff to Fill Gully South of Viewing Area (Nov/Dec 2015)931 11 Total Volume Delivered to Bluff to Fill Gully at Viewing Area (Jan 2016)12012Total Volume Delivered to Bluff Face (Not Counted as Mitigation)4,469 13 Total Sand Delivered (Sum Lines 6, 8, and 12)22,485 2 2.0 100 3 2.0 80 160 200 Mitigation Volume Bluff Face Volume (Not Counted as Mitigation) Total Sand Delivered 4 1 4.21 435 1831 Table 6. Sand Delivered April 1, 2015 - March 31, 2016 Geotube Construction - 4th Tier and Returns 2.0 290 580 5 2.0 80 160 Page 4 of 10 Line Sand Delivery Amounts Cubic Yard (CY)/ Linear Foot (LF) Project Length (LF)Total CY 1 August through December 2016 1,230 2 May 2017 9,320 3 December 2017 2,090 4 January 2018 2,499 5 Total Sand Delivered (Sum Lines 1-4)15,138 Line Sand Delivery Amounts Cubic Yard (CY)/ Linear Foot (LF) Project Length (LF)Total CY 1 February 2018 40 2 March 2018 5,506 3 April 2018 2,606 5 Total Sand Delivered (Sum Lines 1-3)8,152 Line Sand Delivery Amounts Cubic Yard (CY)/ Linear Foot (LF) Project Length (LF)Total CY 1 October 2018 2,204 2 November 2018 3,156 3 January 2019 4,120 4 February 2019 2,683 5 October 2019 5,400 6 November 2019 4,266 7 December 2019 1,506 8 Total Sand Delivered (Sum Lines 1-4)23,335 Table 9. Sand Delivered May 1, 2018 - December 31, 2019 Mitigation Volume Mitigation Volume Mitigation Volume Table 8. Sand Delivered February 1, 2018 - April 30, 2018 Table 7. Sand Delivered April 1, 2016 - January 31, 2018 Page 5 of 10 Sand Delivery Receipts DELIVERY DETAIL 5/1/2018 ‐ 3/31/2019Vendor Invoice #Date Truck ID Time Quantity  Unit Cost  Invoice Total Service Sand TicketRead Custom Soils, LLC 60479 10/12/2018 SHU815:14 26.00             16.50 429.00          Beach Sand/Read137805Read Custom Soils, LLC 60605 10/15/2018 MCDUF56:58 26.00             16.50 429.00          Beach Sand/Read137808Read Custom Soils, LLC 60605 10/15/2018 CUR17:01 26.00             16.50 429.00          Beach Sand/Read137809Read Custom Soils, LLC 60605 10/15/2018 JCM17:04 26.00             16.50 429.00          Beach Sand/Read137810Read Custom Soils, LLC 60605 10/15/2018 ANGUS17:07 26.00             16.50 429.00          Beach Sand/Read137811Read Custom Soils, LLC 60605 10/15/2018 GEL297:09 26.00             16.50 429.00          Beach Sand/Read137812Read Custom Soils, LLC 60605 10/15/2018 RCS537:18 26.00             16.50 429.00          Beach Sand/Read137816Read Custom Soils, LLC 60605 10/15/2018 SORENT7:35 26.00             16.50 429.00          Beach Sand/Read137824Read Custom Soils, LLC 60605 10/15/2018 SHU87:40 26.00             16.50 429.00          Beach Sand/Read137827Read Custom Soils, LLC 60605 10/15/2018 MCDUF58:19 26.00             16.50 429.00          Beach Sand/Read137836Read Custom Soils, LLC 60605 10/15/2018 CURTIS8:22 26.00             16.50 429.00          Beach Sand/Read137837Read Custom Soils, LLC 60605 10/15/2018 JCM18:26 26.00             16.50 429.00          Beach Sand/Read137838Read Custom Soils, LLC 60605 10/15/2018 ANGUS18:44 26.00             16.50 429.00          Beach Sand/Read137841Read Custom Soils, LLC 60605 10/15/2018 GEL298:46 26.00             16.50 429.00          Beach Sand/Read137842Read Custom Soils, LLC 60605 10/15/2018 SHU88:56 26.00             16.50 429.00          Beach Sand/Read137843Read Custom Soils, LLC 60605 10/15/2018 SORENT8:58 26.00             16.50 429.00          Beach Sand/Read137844Read Custom Soils, LLC 60605 10/15/2018 MCDUF59:33 26.00             16.50 429.00         Beach Sand/Read137855Read Custom Soils, LLC6060510/15/2018 CUR19:37 26.00             16.50 429.00          Beach Sand/Read137856Read Custom Soils, LLC 60605 10/15/2018 JCM19:43 26.00             16.50 429.00          Beach Sand/Read137858Read Custom Soils, LLC 60605 10/15/2018 ANGUS110:11 26.00             16.50 429.00          Beach Sand/Read137863Read Custom Soils, LLC 60605 10/15/2018 SORENT10:13 26.00             16.50 429.00          Beach Sand/Read137864Read Custom Soils, LLC 60605 10/15/2018 SHU810:18 26.00             16.50 429.00          Beach Sand/Read137866Read Custom Soils, LLC 60605 10/15/2018 GEL2910:22 26.00             16.50 429.00          Beach Sand/Read137868Read Custom Soils, LLC 60605 10/15/2018 MCDUF510:55 26.00             16.50 429.00          Beach Sand/Read137872Read Custom Soils, LLC 60605 10/15/2018 CUR111:00 26.00             16.50 429.00          Beach Sand/Read137874Read Custom Soils, LLC 60605 10/15/2018 JCM111:09 26.00             16.50 429.00          Beach Sand/Read137878Read Custom Soils, LLC 60605 10/15/2018 SORENT11:30 26.00             16.50 429.00          Beach Sand/Read137883Read Custom Soils, LLC 60605 10/15/2018 SHU811:42 26.00             16.50 429.00          Beach Sand/Read137887Read Custom Soils, LLC 60605 10/15/2018 ANGUS111:44 26.00             16.50 429.00          Beach Sand/Read137888 Read Custom Soils, LLC 60605 10/15/2018 GEL2911:47 26.00             16.50 429.00          Beach Sand/Read137889Read Custom Soils, LLC 60605 10/15/2018 MCDUF512:19 26.00             16.50 429.00          Beach Sand/Read137895Read Custom Soils, LLC 60605 10/15/2018 CUR112:24 26.00             16.50 429.00          Beach Sand/Read137897Read Custom Soils, LLC 60605 10/15/2018 JCM112:27 26.00             16.50 429.00          Beach Sand/Read137898Read Custom Soils, LLC 60605 10/15/2018 SORENT13:01 26.00             16.50 429.00          Beach Sand/Read137906Read Custom Soils, LLC 60605 10/15/2018 ANGUS113:12 26.00             16.50 429.00          Beach Sand/Read137909Read Custom Soils, LLC 60605 10/15/2018 GEL291:20 ‐             ‐   ‐                 Beach Sand/Read137912Read Custom Soils, LLC 60920 10/30/2018 SOLAR n/a20.00             16.50 330.00          Beach Sand/Read74177PM Reis Trucking 136177 10/30/2018 #414:00 20.00             50.00 1,000.00       Beach Sand/Reis127808PM Reis Trucking 136177 10/30/2018 #415:00 20.00             50.00 1,000.00       Beach Sand/Reis127808PM Reis Trucking 136177 10/30/2018 #415:40 20.00             50.00 1,000.00       Beach Sand/Reis127808PM Reis Trucking 136177 10/30/2018 #213:40 16.00             50.00 800.00          Beach Sand/Reis128684PM Reis Trucking 136177 10/30/2018 #214:20 16.00             50.00 800.00          Beach Sand/Reis128684PM Reis Trucking 136177 10/30/2018 #214:55 16.00             50.00 800.00          Beach Sand/Reis128684PM Reis Trucking 136177 10/30/2018 #215:25 16.00             50.00 800.00          Beach Sand/Reis128684PM Reis Trucking 136177 10/30/2018 #2513:30 20.00             50.00 1,000.00       Beach Sand/Reis128777PM Reis Trucking 136177 10/30/2018 #2514:15 20.00             50.00 1,000.00       Beach Sand/Reis128777PM Reis Trucking136177 10/30/2018#2514:5520.00             50.00 1,000.00       Beach Sand/Reis128777PM Reis Trucking 136177 10/30/2018 #2515:25 20.00             50.00 1,000.00       Beach Sand/Reis128777PM Reis Trucking 136177 10/30/2018 New Mack 13:30 20.00             50.00 1,000.00       Beach Sand/Reis128830PM Reis Trucking 136177 10/30/2018 New Mack 14:00 20.00             50.00 1,000.00       Beach Sand/Reis128830PM Reis Trucking 136177 10/30/2018 New Mack 14:30 20.00             50.00 1,000.00       Beach Sand/Reis128830PM Reis Trucking 136177 10/30/2018 New Mack 15:00 20.00             50.00 1,000.00       Beach Sand/Reis128830PM Reis Trucking 136177 10/30/2018 #513:30 20.00             50.00 1,000.00       Beach Sand/Reis137001PM Reis Trucking 136177 10/30/2018 #514:05 20.00             50.00 1,000.00       Beach Sand/Reis137001PM Reis Trucking 136177 10/30/2018 #514:40 20.00             50.00 1,000.00       Beach Sand/Reis137001PM Reis Trucking 136177 10/30/2018 #515:10 20.00             50.00 1,000.00       Beach Sand/Reis137001PM Reis Trucking 136177 10/30/2018 #515:45 20.00             50.00 1,000.00       Beach Sand/Reis137001Read Custom Soils, LLC 60920 10/30/2018 SHU87:00 26.00             16.50 429.00          Beach Sand/Read138999Read Custom Soils, LLC 60920 10/30/2018 POMPEO17:06 26.00             16.50 429.00          Beach Sand/Read139000Read Custom Soils, LLC 60920 10/30/2018 CUR17:11 26.00             16.50 429.00          Beach Sand/Read139002Read Custom Soils, LLC 60920 10/30/2018 SHU97:30 26.00             16.50 429.00          Beach Sand/Read139010Read Custom Soils, LLC 60920 10/30/2018 SHU17:32 26.00             16.50 429.00          Beach Sand/Read139011Read Custom Soils, LLC 60920 10/30/2018 MCDUF57:36 26.00             16.50 429.00          Beach Sand/Read139013DELIVERY DETAIL 5/1/2018 ‐ 3/31/2019Vendor Invoice # Date Truck ID Time Quantity  Unit Cost  Invoice Total Service Sand Ticket Read Custom Soils, LLC 60920 10/30/2018 RMBK17:41 26.00             16.50 429.00          Beach Sand/Read139015Read Custom Soils, LLC 60920 10/30/2018 SHU88:16 26.00             16.50 429.00          Beach Sand/Read139032Read Custom Soils, LLC 60920 10/30/2018 POMPEO18:18 26.00             16.50 429.00          Beach Sand/Read139033Read Custom Soils, LLC 60920 10/30/2018 CUR18:36 26.00             16.50 429.00          Beach Sand/Read139035Read Custom Soils, LLC 60920 10/30/2018 SHU19:05 26.00             16.50 429.00          Beach Sand/Read139039Read Custom Soils, LLC 60920 10/30/2018 SHU99:08 26.00             16.50 429.00          Beach Sand/Read139040Read Custom Soils, LLC 60920 10/30/2018 RMBK19:11 26.00             16.50 429.00          Beach Sand/Read139041Read Custom Soils, LLC 60920 10/30/2018 SHU89:35 26.00             16.50 429.00          Beach Sand/Read139047Read Custom Soils, LLC 60920 10/30/2018 POMPEO19:39 26.00             16.50 429.00          Beach Sand/Read139049Read Custom Soils, LLC 60920 10/30/2018 MCDUF510:00 26.00             16.50 429.00          Beach Sand/Read139057Read Custom Soils, LLC 60920 10/30/2018 CUR110:04 26.00             16.50 429.00          Beach Sand/Read139058Read Custom Soils, LLC 60920 10/30/2018 SHU110:32 26.00             16.50 429.00          Beach Sand/Read139064Read Custom Soils, LLC 60920 10/30/2018 SHU810:47 26.00             16.50 429.00          Beach Sand/Read139065Read Custom Soils, LLC 60920 10/30/2018 SHU910:51 26.00             16.50 429.00          Beach Sand/Read139067Read Custom Soils, LLC 60920 10/30/2018 RMBK110:53 26.00             16.50 429.00          Beach Sand/Read139068Read Custom Soils, LLC 60920 10/30/2018 POMPEO1 10:55 26.00             16.50 429.00          Beach Sand/Read139069Read Custom Soils, LLC 60920 10/30/2018 MCDUF511:27 26.00             16.50 429.00          Beach Sand/Read139080Read Custom Soils, LLC60920 10/30/2018CUR111:3326.00             16.50 429.00          Beach Sand/Read139083Read Custom Soils, LLC 60920 10/30/2018 SHU112:00 26.00             16.50 429.00          Beach Sand/Read139094Read Custom Soils, LLC 60920 10/30/2018 SHU812:10 26.00             16.50 429.00          Beach Sand/Read139095Read Custom Soils, LLC 60920 10/30/2018 SHU912:20 26.00             16.50 429.00          Beach Sand/Read139096Read Custom Soils, LLC 60920 10/30/2018 RMBK112:27 26.00             16.50 429.00          Beach Sand/Read139099Read Custom Soils, LLC 60920 10/30/2018 POMPEO1 12:37 26.00             16.50 429.00          Beach Sand/Read139103Read Custom Soils, LLC 60920 10/30/2018 MCDUF513:00 26.00             16.50 429.00          Beach Sand/Read139108Read Custom Soils, LLC 60920 10/30/2018 CUR113:02 26.00             16.50 429.00          Beach Sand/Read139109Read Custom Soils, LLC 60920 10/30/2018 SHU113:22 26.00             16.50 429.00          Beach Sand/Read139115Read Custom Soils, LLC 60920 10/30/2018 POMPEO1 13:53 26.00             16.50 429.00          Beach Sand/Read139125Read Custom Soils, LLC 60920 10/30/2018 MCDUF514:20 26.00             16.50 429.00          Beach Sand/Read139132PM Reis Trucking 135885 11/8/2018 #128:05 20.00             50.00 1,000.00       Beach Sand/Reis136396PM Reis Trucking 135885 11/8/2018 New Mack7:20 20.00             50.00 1,000.00       Beach Sand/Reis136397PM Reis Trucking 135885 11/8/2018 New Mack8:30 20.00             50.00 1,000.00       Beach Sand/Reis136397PM Reis Trucking 135885 11/8/2018 New Mack9:30 20.00             50.00 1,000.00       Beach Sand/Reis136397PM Reis Trucking 135885 11/8/2018 #48:15 16.00             50.00 800.00          Beach Sand/Reis136398PM Reis Trucking 135885 11/8/2018 #49:00 16.00             50.00 800.00          Beach Sand/Reis136398DELIVERY DETAIL 5/1/2018 ‐ 3/31/2019Vendor Invoice # Date Truck ID Time Quantity  Unit Cost  Invoice Total Service Sand Ticket PM Reis Trucking 135885 11/8/2018 #57:00 20.00             50.00 1,000.00       Beach Sand/Reis136399PM Reis Trucking 135936 11/13/2018 #49:00 20.00             50.00 1,000.00       Beach Sand/Reis127014PM Reis Trucking 135936 11/13/2018 #49:38 20.00             50.00 1,000.00       Beach Sand/Reis127014PM Reis Trucking 135936 11/13/2018 #410:13 20.00             50.00 1,000.00       Beach Sand/Reis127014PM Reis Trucking 135936 11/13/2018 #410:47 20.00             50.00 1,000.00       Beach Sand/Reis127014PM Reis Trucking 135936 11/13/2018 #411:21 20.00             50.00 1,000.00       Beach Sand/Reis127014PM Reis Trucking 135936 11/13/2018 #411:58 20.00             50.00 1,000.00       Beach Sand/Reis127014PM Reis Trucking 135936 11/13/2018 #412:32 20.00             50.00 1,000.00       Beach Sand/Reis127014PM Reis Trucking 135936 11/13/2018 #413:26 20.00             50.00 1,000.00       Beach Sand/Reis127014PM Reis Trucking 135936 11/13/2018 #257:26 20.00             50.00 1,000.00       Beach Sand/Reis128784PM Reis Trucking 135936 11/13/2018 #258:15 20.00             50.00 1,000.00       Beach Sand/Reis128784PM Reis Trucking 135936 11/13/2018 #258:50 20.00             50.00 1,000.00       Beach Sand/Reis128784PM Reis Trucking 135936 11/13/2018 #259:20 20.00             50.00 1,000.00       Beach Sand/Reis128784PM Reis Trucking 135936 11/13/2018 #259:45 20.00             50.00 1,000.00       Beach Sand/Reis128784PM Reis Trucking 135936 11/13/2018 #2510:25 20.00             50.00 1,000.00       Beach Sand/Reis128784PM Reis Trucking 135936 11/13/2018 #2510:55 20.00             50.00 1,000.00       Beach Sand/Reis128784PM Reis Trucking 135936 11/13/2018 #2511:30 20.00             50.00 1,000.00       Beach Sand/Reis128784PM Reis Trucking135936 11/13/2018#2512:0820.00             50.00 1,000.00       Beach Sand/Reis128784PM Reis Trucking 135936 11/13/2018 #2512:40 20.00             50.00 1,000.00       Beach Sand/Reis128784PM Reis Trucking 135936 11/13/2018 #2513:13 20.00             50.00 1,000.00       Beach Sand/Reis128784PM Reis Trucking 135936 11/13/2018 #2513:45 20.00             50.00 1,000.00       Beach Sand/Reis128784PM Reis Trucking 135936 11/13/2018 New Mack7:20 20.00             50.00 1,000.00       Beach Sand/Reis128838PM Reis Trucking 135936 11/13/2018 New Mack8:15 20.00             50.00 1,000.00       Beach Sand/Reis128838PM Reis Trucking 135936 11/13/2018 New Mack8:45 20.00             50.00 1,000.00       Beach Sand/Reis128838PM Reis Trucking 135936 11/13/2018 New Mack9:10 20.00             50.00 1,000.00       Beach Sand/Reis128838PM Reis Trucking 135936 11/13/2018 New Mack9:45 20.00             50.00 1,000.00       Beach Sand/Reis128838PM Reis Trucking 135936 11/13/2018 New Mack 10:20 20.00             50.00 1,000.00       Beach Sand/Reis128838PM Reis Trucking 135936 11/13/2018 New Mack 11:00 20.00             50.00 1,000.00       Beach Sand/Reis128838PM Reis Trucking 135936 11/13/2018 New Mack 11:30 20.00             50.00 1,000.00       Beach Sand/Reis128838PM Reis Trucking 135936 11/13/2018 New Mack 12:05 20.00             50.00 1,000.00       Beach Sand/Reis128838PM Reis Trucking 135936 11/13/2018 New Mack 12:40 20.00             50.00 1,000.00       Beach Sand/Reis128838PM Reis Trucking 135936 11/13/2018 New Mack 13:20 20.00             50.00 1,000.00       Beach Sand/Reis128838PM Reis Trucking 135936 11/13/2018 New Mack 13:55 20.00             50.00 1,000.00       Beach Sand/Reis128838PM Reis Trucking 135936 11/13/2018 #127:35 16.00             50.00 800.00          Beach Sand/Reis131993DELIVERY DETAIL 5/1/2018 ‐ 3/31/2019Vendor Invoice # Date Truck ID Time Quantity  Unit Cost  Invoice Total Service Sand Ticket PM Reis Trucking 135936 11/13/2018 #128:20 16.00             50.00 800.00          Beach Sand/Reis131993PM Reis Trucking 135936 11/13/2018 #128:55 16.00             50.00 800.00          Beach Sand/Reis131993PM Reis Trucking 135936 11/13/2018 #129:30 16.00             50.00 800.00          Beach Sand/Reis131993PM Reis Trucking 135936 11/13/2018 #1210:00 16.00             50.00 800.00          Beach Sand/Reis131993PM Reis Trucking 135936 11/13/2018 #1210:30 16.00             50.00 800.00          Beach Sand/Reis131993PM Reis Trucking 135936 11/13/2018 #1211:10 16.00             50.00 800.00          Beach Sand/Reis131993PM Reis Trucking 135936 11/13/2018 #1211:40 16.00             50.00 800.00          Beach Sand/Reis131993PM Reis Trucking 135936 11/13/2018 #1212:15 16.00             50.00 800.00          Beach Sand/Reis131993PM Reis Trucking 135936 11/13/2018 #1212:45 16.00             50.00 800.00          Beach Sand/Reis131993PM Reis Trucking 135936 11/13/2018 #1213:20 16.00             50.00 800.00          Beach Sand/Reis131993PM Reis Trucking 135936 11/13/2018 #57:25 20.00             50.00 1,000.00       Beach Sand/Reis137008PM Reis Trucking 135936 11/13/2018 #58:12 20.00             50.00 1,000.00       Beach Sand/Reis137008PM Reis Trucking 135936 11/13/2018 #58:50 20.00             50.00 1,000.00       Beach Sand/Reis137008PM Reis Trucking 135936 11/13/2018 #59:23 20.00             50.00 1,000.00       Beach Sand/Reis137008PM Reis Trucking 135936 11/13/2018 #59:56 20.00             50.00 1,000.00       Beach Sand/Reis137008PM Reis Trucking 135936 11/13/2018 #510:27 20.00             50.00 1,000.00       Beach Sand/Reis137008PM Reis Trucking 135936 11/13/2018 #511:01 20.00             50.00 1,000.00       Beach Sand/Reis137008PM Reis Trucking135936 11/13/2018#511:3220.00             50.00 1,000.00       Beach Sand/Reis137008PM Reis Trucking 135936 11/13/2018 #512:06 20.00             50.00 1,000.00       Beach Sand/Reis137008PM Reis Trucking 135936 11/13/2018 #512:40 20.00             50.00 1,000.00       Beach Sand/Reis137008PM Reis Trucking 135936 11/13/2018 #513:15 20.00             50.00 1,000.00       Beach Sand/Reis137008PM Reis Trucking 135936 11/13/2018 #513:47 20.00             50.00 1,000.00       Beach Sand/Reis137008PM Reis Trucking 135936 11/13/2018 Tri‐Axle7:45 22.00             50.00 1,100.00       Beach Sand/Reis137352PM Reis Trucking 135936 11/13/2018 Tri‐Axle8:25 22.00             50.00 1,100.00       Beach Sand/Reis137352PM Reis Trucking 135936 11/13/2018 Tri‐Axle9:00 22.00             50.00 1,100.00       Beach Sand/Reis137352PM Reis Trucking 135936 11/13/2018 Tri‐Axle9:35 22.00             50.00 1,100.00       Beach Sand/Reis137352PM Reis Trucking 135936 11/13/2018 Tri‐Axle10:10 22.00             50.00 1,100.00       Beach Sand/Reis137352PM Reis Trucking 135936 11/13/2018 Tri‐Axle10:40 22.00             50.00 1,100.00       Beach Sand/Reis137352PM Reis Trucking 135936 11/13/2018 Tri‐Axle11:15 22.00             50.00 1,100.00       Beach Sand/Reis137352PM Reis Trucking 135936 11/13/2018 Tri‐Axle11:50 22.00             50.00 1,100.00       Beach Sand/Reis137352PM Reis Trucking 135936 11/13/2018 Tri‐Axle12:20 22.00             50.00 1,100.00       Beach Sand/Reis137352PM Reis Trucking 135936 11/13/2018 Tri‐Axle13:00 22.00             50.00 1,100.00       Beach Sand/Reis137352PM Reis Trucking 135936 11/13/2018 Tri‐Axle13:35 22.00             50.00 1,100.00       Beach Sand/Reis137352PM Reis Trucking 135936 11/13/2018 Perry Mack 7:20 16.00             50.00 800.00          Beach Sand/Reis138692DELIVERY DETAIL 5/1/2018 ‐ 3/31/2019Vendor Invoice # Date Truck ID Time Quantity  Unit Cost  Invoice Total Service Sand Ticket PM Reis Trucking 135936 11/13/2018 Perry Mack 7:55 16.00             50.00 800.00          Beach Sand/Reis138692PM Reis Trucking 135936 11/13/2018 Perry Mack 8:30 16.00             50.00 800.00          Beach Sand/Reis138692PM Reis Trucking 135936 11/13/2018 Perry Mack 9:15 16.00             50.00 800.00          Beach Sand/Reis138692PM Reis Trucking 135936 11/13/2018 Perry Mack 9:40 16.00             50.00 800.00          Beach Sand/Reis138692PM Reis Trucking 135936 11/13/2018 Perry Mack 10:15 16.00             50.00 800.00          Beach Sand/Reis138692PM Reis Trucking 135936 11/13/2018 Perry Mack 10:50 16.00             50.00 800.00          Beach Sand/Reis138692PM Reis Trucking 135936 11/13/2018 Perry Mack 11:25 16.00             50.00 800.00          Beach Sand/Reis138692PM Reis Trucking 135936 11/13/2018 Perry Mack 12:00 16.00             50.00 800.00          Beach Sand/Reis138692PM Reis Trucking 135936 11/13/2018 Perry Mack 12:30 16.00             50.00 800.00          Beach Sand/Reis138692PM Reis Trucking 135936 11/13/2018 Perry Mack 13:05 16.00             50.00 800.00          Beach Sand/Reis138692PM Reis Trucking 135936 11/13/2018 Perry Mack 13:40 16.00             50.00 800.00          Beach Sand/Reis138692Read Custom Soils, LLC 61113 11/15/2018 SHU8 13:12 26.00             16.50 429.00          Beach Sand/Read139818Read Custom Soils, LLC 61113 11/15/2018 CUR1 14:23 26.00             16.50 429.00          Beach Sand/Read139835Read Custom Soils, LLC 61113 11/15/2018 POMPEO1 15:12 26.00             16.50 429.00          Beach Sand/Read139845Read Custom Soils, LLC 61113 11/15/2018 POMPEO1 6:56 26.00             16.50 429.00          Beach Sand/Read139847Read Custom Soils, LLC 61113 11/15/2018 ANGUS1 7:02 26.00             16.50 429.00          Beach Sand/Read139850Read Custom Soils, LLC 61113 11/15/2018 CUR1 7:06 26.00             16.50 429.00          Beach Sand/Read139852Read Custom Soils, LLC61113 11/15/2018SHU87:1026.00             16.50 429.00          Beach Sand/Read139854Read Custom Soils, LLC 61113 11/15/2018 SORENT7:58 26.00             16.50 429.00          Beach Sand/Read139865Read Custom Soils, LLC 61113 11/15/2018 POMPEO18:16 26.00             16.50 429.00          Beach Sand/Read139871Read Custom Soils, LLC 61113 11/15/2018 ANGUS18:30 26.00             16.50 429.00          Beach Sand/Read139872Read Custom Soils, LLC 61113 11/15/2018 CUR18:32 26.00             16.50 429.00          Beach Sand/Read139873Read Custom Soils, LLC 61113 11/15/2018 SHU88:34 26.00             16.50 429.00          Beach Sand/Read139874Read Custom Soils, LLC 61113 11/15/2018 JCM19:30 26.00             16.50 429.00          Beach Sand/Read139884Read Custom Soils, LLC 61113 11/15/2018 SORENT9:32 26.00             16.50 429.00          Beach Sand/Read139885Read Custom Soils, LLC 61113 11/15/2018 POMPEO19:53 26.00             16.50 429.00          Beach Sand/Read139889Read Custom Soils, LLC 61113 11/15/2018 SHU810:03 26.00             16.50 429.00          Beach Sand/Read139893Read Custom Soils, LLC 61113 11/15/2018 CUR110:08 26.00             16.50 429.00          Beach Sand/Read139896Read Custom Soils, LLC 61113 11/15/2018 ANGUS110:26 26.00             16.50 429.00          Beach Sand/Read139901Read Custom Soils, LLC 61113 11/15/2018 SORENT11:03 26.00             16.50 429.00          Beach Sand/Read139908Read Custom Soils, LLC 61113 11/15/2018 JCM111:14 26.00             16.50 429.00          Beach Sand/Read139913Read Custom Soils, LLC 61113 11/15/2018 POMPEO1 11:18 26.00             16.50 429.00          Beach Sand/Read139915Read Custom Soils, LLC 61113 11/15/2018 SHU811:20 26.00             16.50 429.00          Beach Sand/Read139916Read Custom Soils, LLC 61113 11/15/2018 CUR111:33 26.00             16.50 429.00          Beach Sand/Read139920DELIVERY DETAIL 5/1/2018 ‐ 3/31/2019Vendor Invoice # Date Truck ID Time Quantity  Unit Cost  Invoice Total Service Sand Ticket Read Custom Soils, LLC 61113 11/15/2018 SHU211:46 26.00             16.50 429.00          Beach Sand/Read139925Read Custom Soils, LLC 61113 11/15/2018 ANGUS111:53 26.00             16.50 429.00          Beach Sand/Read139927Read Custom Soils, LLC 61113 11/15/2018 SORENT112:16 26.00             16.50 429.00          Beach Sand/Read139931Read Custom Soils, LLC 61113 11/15/2018 JCM112:27 26.00             16.50 429.00          Beach Sand/Read139934Read Custom Soils, LLC 61113 11/15/2018 RCS5312:37 26.00             16.50 429.00          Beach Sand/Read139936Read Custom Soils, LLC 61113 11/15/2018 POMPEO1 12:42 26.00             16.50 429.00          Beach Sand/Read139937Read Custom Soils, LLC 61113 11/15/2018 SHU812:52 26.00             16.50 429.00          Beach Sand/Read139938Read Custom Soils, LLC 61113 11/15/2018 CUR113:03 26.00             16.50 429.00          Beach Sand/Read139941Read Custom Soils, LLC 61113 11/15/2018 SHU213:25 26.00             16.50 429.00          Beach Sand/Read139948Read Custom Soils, LLC 61113 11/15/2018 ANGUS113:27 26.00             16.50 429.00          Beach Sand/Read139949Read Custom Soils, LLC 61113 11/15/2018 MCDUFF513:32 26.00             16.50 429.00          Beach Sand/Read139952Read Custom Soils, LLC 61113 11/15/2018 SORENT13:37 26.00             16.50 429.00          Beach Sand/Read139954Read Custom Soils, LLC 61113 11/15/2018 JCM113:47 26.00             16.50 429.00          Beach Sand/Read139957AH Construction LLC 214 11/26/2018 4 trucks 3 hrs each 192 8.75 1680 Beach Sand/AHAH Construction LLC 214 11/26/2018 2 trucks 3 hrs each 96 8.75 840 Beach Sand/AHAH Construction LLC 214 11/26/2018 2 trucks 9 hrs each 288 8.75 2520 Beach Sand/AHPM Reis Trucking 139263 1/10/2019 #258:25 20.00             50.00 1,000.00       Beach Sand/Reis128796PM Reis Trucking 139263 1/10/2019 #259:05 20.00             50.00 1,000.00       Beach Sand/Reis128796PM Reis Trucking 139263 1/10/2019 #259:40 20.00             50.00 1,000.00       Beach Sand/Reis128796PM Reis Trucking139263 1/10/2019#2510:1520.00             50.00 1,000.00       Beach Sand/Reis128796PM Reis Trucking 139263 1/10/2019 #2511:00 20.00             50.00 1,000.00       Beach Sand/Reis128796PM Reis Trucking 139263 1/10/2019 #2511:45 20.00             50.00 1,000.00       Beach Sand/Reis128796PM Reis Trucking 139263 1/10/2019 #58:30 20.00             50.00 1,000.00       Beach Sand/Reis137031PM Reis Trucking 139263 1/10/2019 #47:35 20.00             50.00 1,000.00       Beach Sand/Reis138358PM Reis Trucking 139263 1/10/2019 #48:15 20.00             50.00 1,000.00       Beach Sand/Reis138358PM Reis Trucking 139263 1/10/2019 #49:00 20.00             50.00 1,000.00       Beach Sand/Reis138358PM Reis Trucking 139263 1/10/2019 #49:45 20.00             50.00 1,000.00       Beach Sand/Reis138358PM Reis Trucking 139263 1/10/2019 #410:30 20.00             50.00 1,000.00       Beach Sand/Reis138358PM Reis Trucking 139263 1/10/2019 #411:20 20.00             50.00 1,000.00       Beach Sand/Reis138358PM Reis Trucking 139263 1/10/2019 New Mack7:40 20.00             50.00 1,000.00       Beach Sand/Reis138403PM Reis Trucking 139263 1/10/2019 New Mack8:45 20.00             50.00 1,000.00       Beach Sand/Reis138403PM Reis Trucking 139263 1/10/2019 New Mack9:30 20.00             50.00 1,000.00       Beach Sand/Reis138403PM Reis Trucking 139263 1/10/2019 New Mack 10:00 20.00             50.00 1,000.00       Beach Sand/Reis138403PM Reis Trucking 139263 1/10/2019 New Mack 10:45 20.00             50.00 1,000.00       Beach Sand/Reis138403DELIVERY DETAIL 5/1/2018 ‐ 3/31/2019Vendor Invoice # Date Truck ID Time Quantity  Unit Cost  Invoice Total Service Sand Ticket PM Reis Trucking 139263 1/10/2019 New Mack 11:30 20.00             50.00 1,000.00       Beach Sand/Reis138403PM Reis Trucking 139322 1/11/2019 Perry Mack 10:05 16.00             50.00 800.00          Beach Sand/Reis128499PM Reis Trucking 139322 1/11/2019 Perry Mack 10:40 16.00             50.00 800.00          Beach Sand/Reis128499PM Reis Trucking 139322 1/11/2019 Perry Mack 11:15 16.00             50.00 800.00          Beach Sand/Reis128499PM Reis Trucking 139322 1/11/2019 Perry Mack 11:50 16.00             50.00 800.00          Beach Sand/Reis128499PM Reis Trucking 139322 1/11/2019 #5 13:20 20.00             50.00 1,000.00       Beach Sand/Reis137032PM Reis Trucking 139322 1/11/2019 #5 13:55 20.00             50.00 1,000.00       Beach Sand/Reis137032PM Reis Trucking 139322 1/11/2019 #5 14:30 20.00             50.00 1,000.00       Beach Sand/Reis137032PM Reis Trucking 139322 1/11/2019 #5 15:05 20.00             50.00 1,000.00       Beach Sand/Reis137032PM Reis Trucking 139322 1/11/2019 #5 15:45 20.00             50.00 1,000.00       Beach Sand/Reis137032PM Reis Trucking 139322 1/11/2019 Tri‐Axle 10:35 22.00             50.00 1,100.00       Beach Sand/Reis137363PM Reis Trucking 139322 1/11/2019 Tri‐Axle 11:10 22.00             50.00 1,100.00       Beach Sand/Reis137363PM Reis Trucking 139322 1/11/2019 Tri‐Axle 11:41 22.00             50.00 1,100.00       Beach Sand/Reis137363PM Reis Trucking 139322 1/11/2019 Tri‐Axle 12:13 22.00             50.00 1,100.00       Beach Sand/Reis137363PM Reis Trucking 139322 1/11/2019 Tri‐Axle 12:45 22.00             50.00 1,100.00       Beach Sand/Reis137363PM Reis Trucking 139322 1/11/2019 Tri‐Axle 13:42 22.00             50.00 1,100.00       Beach Sand/Reis137363PM Reis Trucking 139322 1/11/2019 Tri‐Axle 14:35 22.00             50.00 1,100.00       Beach Sand/Reis137363PM Reis Trucking139322 1/11/2019 Tri‐Axle15:1322.00             50.00 1,100.00       Beach Sand/Reis137363PM Reis Trucking 139322 1/11/2019 #2511:25 20.00             50.00 1,000.00       Beach Sand/Reis138251PM Reis Trucking 139322 1/11/2019 #2512:05 20.00             50.00 1,000.00       Beach Sand/Reis138251PM Reis Trucking 139322 1/11/2019 #2512:30 20.00             50.00 1,000.00       Beach Sand/Reis138251PM Reis Trucking 139322 1/11/2019 #2513:15 20.00             50.00 1,000.00       Beach Sand/Reis138251PM Reis Trucking 139322 1/11/2019 #2513:50 20.00             50.00 1,000.00       Beach Sand/Reis138251PM Reis Trucking 139322 1/11/2019 #2514:25 20.00             50.00 1,000.00       Beach Sand/Reis138251PM Reis Trucking 139322 1/11/2019 #2514:55 20.00             50.00 1,000.00       Beach Sand/Reis138251PM Reis Trucking 139322 1/11/2019 #2515:25 20.00             50.00 1,000.00       Beach Sand/Reis138251PM Reis Trucking 139322 1/11/2019 #410:35 20.00             50.00 1,000.00       Beach Sand/Reis138360PM Reis Trucking 139322 1/11/2019 #411:00 20.00             50.00 1,000.00       Beach Sand/Reis138360PM Reis Trucking 139322 1/11/2019 #411:30 20.00             50.00 1,000.00       Beach Sand/Reis138360PM Reis Trucking 139322 1/11/2019 #412:05 20.00             50.00 1,000.00       Beach Sand/Reis138360PM Reis Trucking 139322 1/11/2019 #412:50 20.00             50.00 1,000.00       Beach Sand/Reis138360PM Reis Trucking 139322 1/11/2019 #413:30 20.00             50.00 1,000.00       Beach Sand/Reis138360PM Reis Trucking 139322 1/11/2019 #414:10 20.00             50.00 1,000.00       Beach Sand/Reis138360PM Reis Trucking 139322 1/11/2019 #414:55 20.00             50.00 1,000.00       Beach Sand/Reis138360DELIVERY DETAIL 5/1/2018 ‐ 3/31/2019Vendor Invoice # Date Truck ID Time Quantity  Unit Cost  Invoice Total Service Sand Ticket PM Reis Trucking 139322 1/11/2019 #415:25 20.00             50.00 1,000.00       Beach Sand/Reis138360PM Reis Trucking 139322 1/11/2019 #416:00 20.00             50.00 1,000.00       Beach Sand/Reis138360PM Reis Trucking 139322 1/11/2019 #311:22 20.00             50.00 1,000.00       Beach Sand/Reis138407PM Reis Trucking 139322 1/11/2019 #312:00 20.00             50.00 1,000.00       Beach Sand/Reis138407PM Reis Trucking 139322 1/11/2019 #312:30 20.00             50.00 1,000.00       Beach Sand/Reis138407PM Reis Trucking 139322 1/11/2019 #313:15 20.00             50.00 1,000.00       Beach Sand/Reis138407PM Reis Trucking 139322 1/11/2019 #313:47 20.00             50.00 1,000.00       Beach Sand/Reis138407PM Reis Trucking 139322 1/11/2019 #314:25 20.00             50.00 1,000.00       Beach Sand/Reis138407PM Reis Trucking 139322 1/11/2019 #314:55 20.00             50.00 1,000.00       Beach Sand/Reis138407PM Reis Trucking 139322 1/11/2019 #315:20 20.00             50.00 1,000.00       Beach Sand/Reis138407PM Reis Trucking 138886 1/17/2019 #57:40 20.00             50.00 1,000.00       Beach Sand/Reis137035PM Reis Trucking 138886 1/17/2019 #58:25 20.00             50.00 1,000.00       Beach Sand/Reis137035PM Reis Trucking 138886 1/17/2019 #59:00 20.00             50.00 1,000.00       Beach Sand/Reis137035PM Reis Trucking 138886 1/17/2019 #59:35 20.00             50.00 1,000.00       Beach Sand/Reis137035PM Reis Trucking 138886 1/17/2019 #510:10 20.00             50.00 1,000.00       Beach Sand/Reis137035PM Reis Trucking 138886 1/17/2019 #510:45 20.00             50.00 1,000.00       Beach Sand/Reis137035PM Reis Trucking 138886 1/17/2019 #511:21 20.00             50.00 1,000.00       Beach Sand/Reis137035PM Reis Trucking138886 1/17/2019#512:0020.00             50.00 1,000.00       Beach Sand/Reis137035PM Reis Trucking 138886 1/17/2019 #512:40 20.00             50.00 1,000.00       Beach Sand/Reis137035PM Reis Trucking 138886 1/17/2019 #513:43 20.00             50.00 1,000.00       Beach Sand/Reis137035PM Reis Trucking 138886 1/17/2019 #514:25 20.00             50.00 1,000.00       Beach Sand/Reis137035PM Reis Trucking 138886 1/17/2019 #515:00 20.00             50.00 1,000.00       Beach Sand/Reis137035PM Reis Trucking 138886 1/17/2019 #515:30 20.00             50.00 1,000.00       Beach Sand/Reis137035PM Reis Trucking 138886 1/17/2019 Tri‐Axle7:55 22.00             50.00 1,100.00       Beach Sand/Reis137366PM Reis Trucking 138886 1/17/2019 Tri‐Axle8:35 22.00             50.00 1,100.00       Beach Sand/Reis137366PM Reis Trucking 138886 1/17/2019 Tri‐Axle9:10 22.00             50.00 1,100.00       Beach Sand/Reis137366PM Reis Trucking 138886 1/17/2019 Tri‐Axle9:55 22.00             50.00 1,100.00       Beach Sand/Reis137366PM Reis Trucking 138886 1/17/2019 Tri‐Axle10:25 22.00             50.00 1,100.00       Beach Sand/Reis137366PM Reis Trucking 138886 1/17/2019 Tri‐Axle11:10 22.00             50.00 1,100.00       Beach Sand/Reis137366PM Reis Trucking 138886 1/17/2019 Tri‐Axle12:00 22.00             50.00 1,100.00       Beach Sand/Reis137366PM Reis Trucking 138886 1/17/2019 Tri‐Axle14:30 22.00             50.00 1,100.00       Beach Sand/Reis137366PM Reis Trucking 138886 1/17/2019 Tri‐Axle15:05 22.00             50.00 1,100.00       Beach Sand/Reis137366PM Reis Trucking 138886 1/17/2019 Tri‐Axle15:40 22.00             50.00 1,100.00       Beach Sand/Reis137366PM Reis Trucking 138886 1/17/2019 AJMack7:15 18.00             50.00 900.00          Beach Sand/Reis137656DELIVERY DETAIL 5/1/2018 ‐ 3/31/2019Vendor Invoice # Date Truck ID Time Quantity  Unit Cost  Invoice Total Service Sand Ticket PM Reis Trucking 138886 1/17/2019 AJMack8:02 18.00             50.00 900.00          Beach Sand/Reis137656PM Reis Trucking 138886 1/17/2019 AJMack9:00 18.00             50.00 900.00          Beach Sand/Reis137656PM Reis Trucking 138886 1/17/2019 AJMack9:40 18.00             50.00 900.00          Beach Sand/Reis137656PM Reis Trucking 138886 1/17/2019 AJMack10:20 18.00             50.00 900.00          Beach Sand/Reis137656PM Reis Trucking 138886 1/17/2019 AJMack11:00 18.00             50.00 900.00          Beach Sand/Reis137656PM Reis Trucking 138886 1/17/2019 AJMack11:30 18.00             50.00 900.00          Beach Sand/Reis137656PM Reis Trucking 138886 1/17/2019 AJMack12:10 18.00             50.00 900.00          Beach Sand/Reis137656PM Reis Trucking 138886 1/17/2019 AJMack12:40 18.00             50.00 900.00          Beach Sand/Reis137656PM Reis Trucking 138886 1/17/2019 AJMack13:10 18.00             50.00 900.00          Beach Sand/Reis137656PM Reis Trucking 138886 1/17/2019 AJMack13:40 18.00             50.00 900.00          Beach Sand/Reis137656PM Reis Trucking 138886 1/17/2019 AJMack14:15 18.00             50.00 900.00          Beach Sand/Reis137656PM Reis Trucking 138886 1/17/2019 AJMack14:45 18.00             50.00 900.00          Beach Sand/Reis137656PM Reis Trucking 138886 1/17/2019 AJMack15:15 18.00             50.00 900.00          Beach Sand/Reis137656PM Reis Trucking 138886 1/17/2019 AJMack15:50 18.00             50.00 900.00          Beach Sand/Reis137656PM Reis Trucking 138886 1/17/2019 #258:00 20.00             50.00 1,000.00       Beach Sand/Reis138256PM Reis Trucking 138886 1/17/2019 #258:50 20.00             50.00 1,000.00       Beach Sand/Reis138256PM Reis Trucking 138886 1/17/2019 #259:30 20.00             50.00 1,000.00       Beach Sand/Reis138256PM Reis Trucking138886 1/17/2019#2510:0520.00             50.00 1,000.00       Beach Sand/Reis138256PM Reis Trucking 138886 1/17/2019 #2510:40 20.00             50.00 1,000.00       Beach Sand/Reis138256PM Reis Trucking 138886 1/17/2019 #2511:15 20.00             50.00 1,000.00       Beach Sand/Reis138256PM Reis Trucking 138886 1/17/2019 #2512:30 20.00             50.00 1,000.00       Beach Sand/Reis138256PM Reis Trucking 138886 1/17/2019 #2513:12 20.00             50.00 1,000.00       Beach Sand/Reis138256PM Reis Trucking 138886 1/17/2019 #2514:00 20.00             50.00 1,000.00       Beach Sand/Reis138256PM Reis Trucking 138886 1/17/2019 #2514:40 20.00             50.00 1,000.00       Beach Sand/Reis138256PM Reis Trucking 138886 1/17/2019 #2515:30 20.00             50.00 1,000.00       Beach Sand/Reis138256PM Reis Trucking 138886 1/17/2019 Perry Mack 7:35 16.00             50.00 800.00          Beach Sand/Reis138303PM Reis Trucking 138886 1/17/2019 Perry Mack 8:10 16.00             50.00 800.00          Beach Sand/Reis138303PM Reis Trucking 138886 1/17/2019 Perry Mack 8:40 16.00             50.00 800.00          Beach Sand/Reis138303PM Reis Trucking 138886 1/17/2019 Perry Mack 9:25 16.00             50.00 800.00          Beach Sand/Reis138303PM Reis Trucking 138886 1/17/2019 Perry Mack 10:00 16.00             50.00 800.00          Beach Sand/Reis138303PM Reis Trucking 138886 1/17/2019 Perry Mack 10:30 16.00             50.00 800.00          Beach Sand/Reis138303PM Reis Trucking 138886 1/17/2019 Perry Mack 11:05 16.00             50.00 800.00          Beach Sand/Reis138303PM Reis Trucking 138886 1/17/2019 Perry Mack 11:50 16.00             50.00 800.00          Beach Sand/Reis138303PM Reis Trucking 138886 1/17/2019 #47:45 20.00             50.00 1,000.00       Beach Sand/Reis138364DELIVERY DETAIL 5/1/2018 ‐ 3/31/2019Vendor Invoice # Date Truck ID Time Quantity  Unit Cost  Invoice Total Service Sand Ticket PM Reis Trucking 138886 1/17/2019 #48:45 20.00             50.00 1,000.00       Beach Sand/Reis138364PM Reis Trucking 138886 1/17/2019 #49:30 20.00             50.00 1,000.00       Beach Sand/Reis138364PM Reis Trucking 138886 1/17/2019 #410:25 20.00             50.00 1,000.00       Beach Sand/Reis138364PM Reis Trucking 138886 1/17/2019 #410:40 20.00             50.00 1,000.00       Beach Sand/Reis138364PM Reis Trucking 138886 1/17/2019 #411:10 20.00             50.00 1,000.00       Beach Sand/Reis138364PM Reis Trucking 138886 1/17/2019 #411:45 20.00             50.00 1,000.00       Beach Sand/Reis138364PM Reis Trucking 138886 1/17/2019 #412:45 20.00             50.00 1,000.00       Beach Sand/Reis138364PM Reis Trucking 138886 1/17/2019 #413:15 20.00             50.00 1,000.00       Beach Sand/Reis138364PM Reis Trucking 138886 1/17/2019 #413:50 20.00             50.00 1,000.00       Beach Sand/Reis138364PM Reis Trucking 138886 1/17/2019 #414:35 20.00             50.00 1,000.00       Beach Sand/Reis138364PM Reis Trucking 138886 1/17/2019 #414:58 20.00             50.00 1,000.00       Beach Sand/Reis138364PM Reis Trucking 138886 1/17/2019 #415:40 20.00             50.00 1,000.00       Beach Sand/Reis138364PM Reis Trucking 138886 1/17/2019 #127:50 16.00             50.00 800.00          Beach Sand/Reis138463PM Reis Trucking 138886 1/17/2019 #128:30 16.00             50.00 800.00          Beach Sand/Reis138463PM Reis Trucking 138886 1/17/2019 #129:00 16.00             50.00 800.00          Beach Sand/Reis138463PM Reis Trucking 138886 1/17/2019 #129:40 16.00             50.00 800.00          Beach Sand/Reis138463PM Reis Trucking 138886 1/17/2019 #1210:15 16.00             50.00 800.00          Beach Sand/Reis138463PM Reis Trucking138886 1/17/2019#1210:5016.00             50.00 800.00          Beach Sand/Reis138463PM Reis Trucking 138886 1/17/2019 #1211:30 16.00             50.00 800.00          Beach Sand/Reis138463PM Reis Trucking 138886 1/17/2019 #1212:00 16.00             50.00 800.00          Beach Sand/Reis138463PM Reis Trucking 138886 1/17/2019 #1212:50 16.00             50.00 800.00          Beach Sand/Reis138463PM Reis Trucking 138886 1/17/2019 #1213:36 16.00             50.00 800.00          Beach Sand/Reis138463PM Reis Trucking 138886 1/17/2019 #1214:20 16.00             50.00 800.00          Beach Sand/Reis138463PM Reis Trucking 138886 1/17/2019 #1214:55 16.00             50.00 800.00          Beach Sand/Reis138463PM Reis Trucking 138886 1/17/2019 #1215:30 16.00             50.00 800.00          Beach Sand/Reis138463AH Construction LLC 229 1/23/2019400.00        150.00 1,650.00       Beach Sand/AHAH Construction LLC 229 1/23/2019 1 truck, 9 loads 5 hrs 104.00        150.00 750.00          Beach Sand/AHRead Custom Soils, LLC 62142 1/24/2019 SHU87:15 26.00             16.50 429.00          Beach Sand/Read144349Read Custom Soils, LLC 62142 1/24/2019 JCM17:24 26.00             16.50 429.00          Beach Sand/Read144353Read Custom Soils, LLC 62142 1/24/2019 ANGUS17:31 26.00             16.50 429.00          Beach Sand/Read144356Read Custom Soils, LLC 62142 1/24/2019 RCS537:33 26.00             16.50 429.00          Beach Sand/Read144357Read Custom Soils, LLC 62142 1/24/2019 RCS517:42 26.00             16.50 429.00          Beach Sand/Read144361Read Custom Soils, LLC 62142 1/24/2019 MCDUFF57:53 26.00             16.50 429.00          Beach Sand/Read144367Read Custom Soils, LLC 62142 1/24/2019 SHU88:24 26.00             16.50 429.00          Beach Sand/Read144377DELIVERY DETAIL 5/1/2018 ‐ 3/31/2019Vendor Invoice # Date Truck ID Time Quantity  Unit Cost  Invoice Total Service Sand Ticket Read Custom Soils, LLC 62142 1/24/2019 JCM18:33 26.00             16.50 429.00          Beach Sand/Read144378Read Custom Soils, LLC 62142 1/24/2019 ANGUS18:52 26.00             16.50 429.00          Beach Sand/Read144379Read Custom Soils, LLC 62142 1/24/2019 RCS538:55 26.00             16.50 429.00          Beach Sand/Read144380Read Custom Soils, LLC 62142 1/24/2019 RCS519:00 26.00             16.50 429.00          Beach Sand/Read144382Read Custom Soils, LLC 62142 1/24/2019 LINDQUIST9:03 26.00             16.50 429.00          Beach Sand/Read144383Read Custom Soils, LLC 62142 1/24/2019 MCDUFF59:09 26.00             16.50 429.00          Beach Sand/Read144385Read Custom Soils, LLC 62142 1/24/2019 SHU89:37 26.00             16.50 429.00          Beach Sand/Read144390Read Custom Soils, LLC 62142 1/24/2019 JCM19:44 26.00             16.50 429.00          Beach Sand/Read144391Read Custom Soils, LLC 62142 1/24/2019 ANGUS110:16 26.00             16.50 429.00          Beach Sand/Read144400Read Custom Soils, LLC 62142 1/24/2019 RCS5310:20 26.00             16.50 429.00          Beach Sand/Read144402Read Custom Soils, LLC 62142 1/24/2019 RCS5110:29 26.00             16.50 429.00          Beach Sand/Read144405Read Custom Soils, LLC 62142 1/24/2019 LINDQUIST 10:30 26.00             16.50 429.00          Beach Sand/Read144406Read Custom Soils, LLC 62142 1/24/2019 MCDUFF510:37 26.00             16.50 429.00          Beach Sand/Read144410Read Custom Soils, LLC 62142 1/24/2019 SHU810:53 26.00             16.50 429.00          Beach Sand/Read144418Read Custom Soils, LLC 62142 1/24/2019 JCM110:58 26.00             16.50 429.00          Beach Sand/Read144421Read Custom Soils, LLC 62142 1/24/2019 ANGUS111:43 26.00             16.50 429.00          Beach Sand/Read144429Read Custom Soils, LLC 62142 1/24/2019 RCS5311:44 26.00             16.50 429.00          Beach Sand/Read144430Read Custom Soils, LLC62142 1/24/201926.00             16.50 429.00          Beach Sand/Read144432Read Custom Soils, LLC 62142 1/24/2019 MCDUFF511:55 26.00             16.50 429.00          Beach Sand/Read144434Read Custom Soils, LLC 62142 1/24/2019 SHU812:10 26.00             16.50 429.00          Beach Sand/Read144436Read Custom Soils, LLC 62142 1/24/2019 JCM112:15 26.00             16.50 429.00          Beach Sand/Read144438Read Custom Soils, LLC 62142 1/24/2019 ANGUS113:07 26.00             16.50 429.00          Beach Sand/Read144459Read Custom Soils, LLC 62142 1/24/2019 RCS5313:08 26.00             16.50 429.00          Beach Sand/Read144460Read Custom Soils, LLC 62142 1/24/2019 RCS5113:11 26.00             16.50 429.00          Beach Sand/Read144461Read Custom Soils, LLC 62142 1/24/2019 MCDUFF513:18 26.00             16.50 429.00          Beach Sand/Read144463Read Custom Soils, LLC 62283 2/13/2019 CAMERON7:07 26.00             16.50 429.00          Beach Sand/Read145688Read Custom Soils, LLC 62283 2/13/2019 BLANTON7:10 26.00             16.50 429.00          Beach Sand/Read145689Read Custom Soils, LLC 62283 2/13/2019 SHU87:14 26.00             16.50 429.00          Beach Sand/Read145690Read Custom Soils, LLC 62283 2/13/2019 MCDUFF57:16 26.00             16.50 429.00          Beach Sand/Read145691Read Custom Soils, LLC 62283 2/13/2019 LINDQUIST7:20 26.00             16.50 429.00          Beach Sand/Read145692Read Custom Soils, LLC 62283 2/13/2019 POMPEO17:23 26.00             16.50 429.00          Beach Sand/Read145693Read Custom Soils, LLC 62283 2/13/2019 ANGUS17:29 26.00             16.50 429.00          Beach Sand/Read145696Read Custom Soils, LLC 62283 2/13/2019 RCS517:33 26.00             16.50 429.00          Beach Sand/Read145698Read Custom Soils, LLC 62283 2/13/2019 CAMERON8:27 26.00             16.50 429.00          Beach Sand/Read145713DELIVERY DETAIL 5/1/2018 ‐ 3/31/2019Vendor Invoice # Date Truck ID Time Quantity  Unit Cost  Invoice Total Service Sand Ticket Read Custom Soils, LLC 62283 2/13/2019 BLANTON8:35 26.00             16.50 429.00          Beach Sand/Read145716Read Custom Soils, LLC 62283 2/13/2019 SHU88:39 26.00             16.50 429.00          Beach Sand/Read145717Read Custom Soils, LLC 62283 2/13/2019 MCDUFF58:51 26.00             16.50 429.00          Beach Sand/Read145718Read Custom Soils, LLC 62283 2/13/2019 LINDQUIST8:53 26.00             16.50 429.00          Beach Sand/Read145719Read Custom Soils, LLC 62283 2/13/2019 POMPEO18:57 26.00             16.50 429.00          Beach Sand/Read145720Read Custom Soils, LLC 62283 2/13/2019 ANGUS19:12 26.00             16.50 429.00          Beach Sand/Read145722Read Custom Soils, LLC 62283 2/13/2019 CAMERON9:45 26.00             16.50 429.00          Beach Sand/Read145729Read Custom Soils, LLC 62283 2/13/2019 BLANTON9:54 26.00             16.50 429.00          Beach Sand/Read145733Read Custom Soils, LLC 62283 2/13/2019 SHU89:59 26.00             16.50 429.00          Beach Sand/Read145736Read Custom Soils, LLC 62283 2/13/2019 LINDQUIST 10:11 26.00             16.50 429.00          Beach Sand/Read145737Read Custom Soils, LLC 62283 2/13/2019 POMPEO1 10:14 26.00             16.50 429.00          Beach Sand/Read145738Read Custom Soils, LLC 62283 2/13/2019 ANGUS110:36 26.00             16.50 429.00          Beach Sand/Read145741Read Custom Soils, LLC 62283 2/13/2019 CAMERON 10:59 26.00             16.50 429.00          Beach Sand/Read145743Read Custom Soils, LLC 62283 2/13/2019 BLANTON11:09 26.00             16.50 429.00          Beach Sand/Read145746Read Custom Soils, LLC 62283 2/13/2019 SHU811:15 26.00             16.50 429.00          Beach Sand/Read145748Read Custom Soils, LLC 62283 2/13/2019 LINDQUIST 11:25 26.00             16.50 429.00          Beach Sand/Read145751Read Custom Soils, LLC 62283 2/13/2019 POMPEO1 11:31 26.00             16.50 429.00          Beach Sand/Read145753Read Custom Soils, LLC62283 2/13/2019ANGUS112:0026.00             16.50 429.00          Beach Sand/Read145760Read Custom Soils, LLC 62283 2/13/2019 CAMERON 12:10 26.00             16.50 429.00          Beach Sand/Read145761Read Custom Soils, LLC 62283 2/13/2019 BLANTON12:20 26.00             16.50 429.00          Beach Sand/Read145763Read Custom Soils, LLC 62283 2/13/2019 shu812:37 26.00             16.50 429.00          Beach Sand/Read145766Read Custom Soils, LLC 62283 2/13/2019 LINDQUIST 12:41 26.00             16.50 429.00          Beach Sand/Read145768Read Custom Soils, LLC 62283 2/13/2019 POMPEO1 12:47 26.00             16.50 429.00          Beach Sand/Read145771Read Custom Soils, LLC 62283 2/13/2019 ANGUS113:16 26.00             16.50 429.00          Beach Sand/Read145776AH Construction LLC 241 2/21/2019 Multiple 2/6/2019 252.00           30.00 7,560.00       Beach Sand/AHAH Construction LLC 241 2/21/2019 Multiple 2/7/2019 108.00           30.00 3,240.00       Beach Sand/AHAH Construction LLC 241 2/21/2019 Multiple 2/8/2019 348.00           30.00 10,440.00     Beach Sand/AHAH Construction LLC 241 2/21/2019 Multiple 2/9/2019 486.00           30.00 14,580.00     Beach Sand/AHAH Construction LLC 241 2/21/2019 Multiple 2/10/2019 540.00           30.00 16,200.00     Beach Sand/AHAH Construction LLC 241 2/21/2019 Multiple 2/11/2019 72.00             30.00 2,160.00       Beach Sand/AHDELIVERY DETAIL 5/1/2018 ‐ 3/31/2019Vendor Invoice # Date Truck ID Time Quantity  Unit Cost  Invoice Total Service Sand Ticket DELIVERY DETAIL 4/1/2019 - 12/31/2019 Truck Delivery Date Loads Per Load CYD's Total CYD's Hours Amount Source Delivery Vendor Delivery Location 658 10/17/2019 9 18 162 7.00 1,050.00 Baxter Road, from Sandlot AH Construction To Bluff 658 10/18/2019 12 18 216 8.00 1,200.00 Baxter Road, from Sandlot AH Construction To Bluff 658 10/19/2019 5 18 90 3.00 450.00 Baxter Road, from Sandlot AH Construction To Bluff 658 10/21/2019 7 18 126 5.50 825.00 Baxter Road, from Sandlot AH Construction To Bluff 658 10/23/2019 8 18 144 6.00 900.00 Baxter Road, from Sandlot AH Construction To Bluff 658 10/24/2019 13 18 234 8.50 1,275.00 Baxter Road, from Sandlot AH Construction To Bluff65810/30/2019 3 18 54 1.50 300.00 Baxter Road, from Sandlot AH Construction To Bluff65811/7/2019 1 18 18 0.75 75.00 Baxter Road, from Sandlot AH Construction To Bluff 658 11/13/2019 13 18 234 8.50 1,275.00 Baxter Road, from Sandlot AH Construction To Bluff 658 11/14/2019 13 18 234 8.50 1,275.00 Baxter Road, from Sandlot AH Construction To Bluff 658 11/19/2019 7 18 126 5.00 750.00 Baxter Road, from Sandlot AH Construction To Bluff 658 11/20/2019 5 18 90 3.50 525.00 Baxter Road, from Sandlot AH Construction To Bluff 658 11/21/2019 11 18 198 7.50 1,125.00 Baxter Road, from Sandlot AH Construction To Bluff 097 10/17/2019 12 18 216 8.50 1,275.00 Baxter Road, from Sandlot AH Construction To Bluff 097 10/18/2019 13 18 234 9.50 1,425.00 Baxter Road, from Sandlot AH Construction To Bluff09710/19/2019 6 18 108 5.00 750.00 Baxter Road, from Sandlot AH Construction To Bluff09710/21/2019 5 18 90 4.50 675.00 Baxter Road, from Sandlot AH Construction To Bluff 097 10/23/2019 5 18 90 4.50 675.00 Baxter Road, from Sandlot AH Construction To Bluff 097 10/24/2019 10 18 180 7.50 1,125.00 Baxter Road, from Sandlot AH Construction To Bluff 097 10/30/2019 4 18 72 1.50 275.00 Baxter Road, from Sandlot AH Construction To Bluff 097 11/14/2019 11 18 198 7.00 1,050.00 Baxter Road, from Sandlot AH Construction To Bluff 097 11/19/2019 6 18 108 5.00 750.00 Baxter Road, from Sandlot AH Construction To Bluff 097 11/20/2019 2 18 36 2.00 300.00 Baxter Road, from Sandlot AH Construction To Bluff09711/21/2019 12 18 216 9.00 1,350.00 Baxter Road, from Sandlot AH Construction To Bluff09711/14/2019 11 18 198 7.00 1,050.00 Baxter Road, from Sandlot AH Construction To Bluff 097 11/19/2019 6 18 108 5.00 750.00 Baxter Road, from Sandlot AH Construction To Bluff 097 11/20/2019 2 18 36 2.00 300.00 Baxter Road, from Sandlot AH Construction To Bluff 097 11/21/2019 12 18 216 9.00 1,350.00 Baxter Road, from Sandlot AH Construction To Bluff 083 10/17/2019 8 18 144 6.00 900.00 Baxter Road, from Sandlot AH Construction To Bluff 083 10/18/2019 8 18 144 6.00 900.00 Baxter Road, from Sandlot AH Construction To Bluff 083 10/19/2019 8 18 144 6.00 900.00 Baxter Road, from Sandlot AH Construction To Bluff08310/30/2019 3 18 54 2.00 350.00 Baxter Road, from Sandlot AH Construction To Bluff08311/13/2019 12 18 216 7.50 1,125.00 Baxter Road, from Sandlot AH Construction To Bluff 083 11/14/2019 6 18 108 4.00 600.00 Baxter Road, from Sandlot AH Construction To Bluff 083 11/19/2019 10 18 180 6.50 975.00 Baxter Road, from Sandlot AH Construction To Bluff 083 11/20/2019 5 18 90 3.00 450.00 Baxter Road, from Sandlot AH Construction To Bluff 083 11/21/2019 10 18 180 8.00 1,200.00 Baxter Road, from Sandlot AH Construction To Bluff50010/17/2019 10 18 180 6.50 975.00 Baxter Road, from Sandlot AH Construction To Bluff50010/18/2019 12 18 216 7.50 1,125.00 Baxter Road, from Sandlot AH Construction To Bluff 500 10/21/2019 9 18 162 6.00 900.00 Baxter Road, from Sandlot AH Construction To Bluff 500 10/23/2019 4 18 72 3.00 450.00 Baxter Road, from Sandlot AH Construction To Bluff 500 10/24/2019 9 18 162 6.00 900.00 Baxter Road, from Sandlot AH Construction To Bluff 500 11/13/2019 11 18 198 6.50 975.00 Baxter Road, from Sandlot AH Construction To Bluff 500 11/14/2019 9 18 162 6.00 900.00 Baxter Road, from Sandlot AH Construction To Bluff 500 11/19/2019 10 18 180 7.50 1,100.00 Baxter Road, from Sandlot AH Construction To Bluff 500 11/19/2019 2 18 36 0.50 100.00 Baxter Road, from South Shore Road AH Construction To Bluff20710/18/2019 6 18 108 4.00 600.00 Baxter Road, from Sandlot AH Construction To Bluff20711/19/2019 10 18 180 7.00 1,000.00 Baxter Road, from Sandlot AH Construction To Bluff 207 11/19/2019 2 18 36 1.00 200.00 Baxter Road, from South Shore Road AH Construction To Bluff 473 12/7/2019 7 18 126 8.00 1,200.00 Baxter Road, from Sandlot AH Construction To Bluff 473 10/17/2019 12 18 216 8.00 1,200.00 Baxter Road, from Sandlot AH Construction To Bluff 473 10/18/2019 13 18 234 8.50 1,275.00 Baxter Road, from Sandlot AH Construction To Bluff 473 10/19/2019 5 18 90 3.00 450.00 Baxter Road, from Sandlot AH Construction To Bluff 473 10/21/2019 8 18 144 6.00 900.00 Baxter Road, from Sandlot AH Construction To Bluff47310/23/2019 8 18 144 6.50 975.00 Baxter Road, from Sandlot AH Construction To Bluff47310/24/2019 13 18 234 9.00 1,350.00 Baxter Road, from Sandlot AH Construction To Bluff 473 10/30/2019 1 18 18 1.00 150.00 Baxter Road, from TCE AH Construction To Bluff 473 11/11/2019 8 18 144 6.00 900.00 Baxter Road, from Sandlot AH Construction To Bluff 473 11/19/2019 11 18 198 8.00 1,200.00 Baxter Road, from Sandlot AH Construction To Bluff 473 11/19/2019 2 18 36 1.00 150.00 Baxter Road, from South Shore Road AH Construction To Bluff 473 11/20/2019 5 18 90 3.00 450.00 Baxter Road, from Sandlot AH Construction To Bluff 473 11/21/2019 12 18 216 8.00 1,200.00 Baxter Road, from Sandlot AH Construction To Bluff47310/29/2019 26 18 468 6.00 900.00 Baxter Road, from Sankaty Road AH Construction To Bluff47310/20/2019 20 18 360 5.00 3,000.00 Baxter Road, from Sankaty Road AH Construction To Bluff 473 10/31/2019 5 18 90 1.50 225.00 Baxter Road, from Sankaty Road AH Construction To Bluff 473 12/1/2019 29 18 522 8.00 10,440.00 Baxter Road, from South Shore Road AH Construction To Bluff Valero/Davidson 12/13/2019 34 18 612 12,240.00 Baxter Road, from TCE AH Construction To Bluff Glowacki 12/13/2019 6 18 108 2,150.00 Baxter Road, from TCE AH Construction To Bluff Lafluer 12/13/2019 5 18 90 1,800.00 Baxter Road, from TCE AH Construction To Bluff TCE 12/13/2019 3 18 48 960.00 Baxter Road, from TCE AH Construction To Bluff DELIVERY DETAIL 4/1/2019 - 12/31/2019 Truck Delivery Date Loads Per Load CYD's Total CYD's Hours Amount Source Delivery Vendor Delivery Location Attachment B Sconset Bluff September 2019 Aerial Survey Report Sconset Bluff September 2019 Aerial Survey Report Baxter Road and Sconset Bluff Stabilization Project Nantucket, MA November 2019 Submitted by: Siasconset Beach Preservation Fund PO Box 2279 Nantucket, MA 02584 Prepared by: Epsilon Associates 3 Mill & Main Place, Suite 250 Maynard, MA 01754 21597/Sconset 1 2019 Bluff Aerial Survey Report Epsilon Associates, Inc. 2019 ANNUAL BLUFF AERIAL SURVEY REPORT 1.0 Introduction The Baxter Road and Sconset Bluff Stabilization Project (the “Project”) consists of three-four tiers of geotextile tubes, vegetation planting on the bluff face, and the installation of stormwater runoff drainage system. The Project was constructed in two phases by the Sconset Beach Preservation Fund (“SBPF”). The first phase was constructed in late December 2013 and January 2014 under an Emergency Certification approval issued by the Nantucket Conservation Commission. The first phase consisted of the installation of three stacked tiers of 45-foot circumference geotextiles tubes at the base of the eroding Sconset Bluff. The geotextile tube installation was approximately 852 feet long and extends along the toe of the bank from 87-105 Baxter Road. The second phase was constructed in October 2015 through February 2016 and includes the installation of a fourth tier of geotextile tubes on lots 91-99, intermediate returns, end returns, and a surface runoff drainage system. With the returns included, the total project length is now 947 feet. SBPF intends to perform an annual survey of the bluff face each year, to facilitate the calculation of the following parameters: ♦ Annual change in volume of the bluff face above the geotubes; ♦ Annual change in volume of the unprotected bluff sections to the north and south of the geotextile tubes; and ♦ Volume of sand in the sand template. The 2019 drone LiDAR survey described below is the fourth aerial survey conducted since the Project’s Order of Conditions was issued in Fall 2015. 2.0 Annual Aerial Survey and Data processing An aerial survey of Sconset Bluff was performed by AirShark on September 2 and 3, 2019. As described in the “Southeast Nantucket Beach Monitoring, September 2019, 79th Survey Report” prepared by Woods Hole Group and dated September 2019, this aerial survey included the bluff, dune, and beach areas within the Siasconset Monitoring Area from Low Beach to Wauwinet that have been monitored by Woods Hole Group and others for over 20 years. A subset of the aerial survey data was processed and used to produce a digital surface model (DSM) of those parts of Sconset Bluff within and immediately adjacent to the area of the geotextile tubes. The remainder of this report focuses on the aerial survey data from the aerial survey data from the area of Sconset Bluff within and immediately adjacent to the geotextile tubes. 2.1 2019 Survey Details AirShark was contracted by the SBPF to conduct a UAV flight on September 2 and 3, 2019 of Siasconset Bluff. Airshark is the same firm that previously performed the 2017 and 2018 aerial surveys. The UAV utilized Light Detection and Ranging (LiDAR) to map the bluff, geotextile tubes, 21597/Sconset 2 2019 Bluff Aerial Survey Report Epsilon Associates, Inc. and beach along Baxter Road. LiDAR measures distance to a target by illuminating that target with a pulsed laser light, and measuring the reflected pulses with a sensor. The September 2019 LiDAR mission at Siasconset Beach was flown with a customized DJI M600 Pro flight platform, with a LiDAR capture system provided by Phoenix Aerial Systems. The platform was flown at approximately 200 – 250ft above ground level (AGL) above the beach in a series of oval pattern flights. This resulted in a single pass directly up the beach, with the return to home capturing data along the bluff and giving an approximate 40% sidelap across the previous LiDAR track. Due to the scale of the project area, the point spacing of the project varies but is generally between 30-40 points/m2. In comparison to the 2018 collection, the September 2019 collections were performed on a series of automated missions which improves both repeatability and collection efficiency. Takeoff and landings continue to be flown manually. The collection and data processing were produced to meet the American Society for Photogrammetry and Remote Sensing (“ASPRS”) 2.5 centimeters (cm) and 5 cm Vertical Accuracy Classes. Independent control and check points were not available for this collection; however, “Aeropoints,” manufactured by Propeller Aero were laid down near the launch zones for each flight. Aeropoints are “mapping grade” GNSS receivers embedded in square foam targets; these targets provide a manufacturer specified ~5 cm Root Mean Square Error (RMSEz) accuracy point when laid out according to instructions. In practice these targets tend to be significantly more accurate under ideal conditions; for this project the Aeropoints report approximately 1 cm RMS horizontal positional error (X and Y). Comparing the LiDAR data against the 9 available Aeropoints yields a vertical RMSEz of 1.5 cm (Z). An ortho image of the project area was also generated from the low-resolution onboard RGB camera, with a ground resolution of approximately 15 cm/pixel. 3.0 Changes in Bluff Volume To understand changes in the bluff volume since Project construction, the results of the 2019 survey were compared to the previous aerial surveys of the Project area that were conducted in May 2018, August 2017 and July 2013. The July 2013 survey was conducted about 6 months prior to the installation of the geotextile tubes. 3.1 Changes in Bluff Volume in Adjacent Unprotected Areas The results of the 2019 aerial survey were used to calculate the changes in the bluff volume from 2018 to 2019 for those unprotected areas immediately adjacent to the geotextile tube project (Figure 1). During review of the updated profile views it was determined that the break in slope between beach and bluff is best captured by using elevation +12 feet relative to the North American Vertical Datum of 1988 (NAVD 88).1 Therefore, the change in the bluff volume in these unprotected areas was calculated from the toe of the bluff (elevation +12 feet NAVD 88) to the top of the bluff. 1 The conversion from Mean Low Water 92 to NAVD 88 is -1.88 feet. 21597/Sconset 3 2019 Bluff Aerial Survey Report Epsilon Associates, Inc. ♦ For the north unprotected area, the section of the bluff within 802 feet immediately to the north of the geotextile tubes was used. ♦ For the south unprotected area, the section of bluff within 138 feet immediately to the south of the geotextile tubes was used. Areas farther south than this could not be used because they had coir or jute terraces installed so were not representative of the unprotected bluff. ♦ No areas with a bulge of sand from sand delivery activities at the accessway between 85 and 87 Baxter Road were used in the calculations. In particular, the size of the south unprotected area was reduced in 2019 (i.e. the northern boundary was moved farther south) to account for sand delivery activities and the associated accretion of sand on the bluff face extending farther south in 2019 than in previous years. As shown in Tables 1a-d, this analysis indicates that the unprotected areas immediately adjacent to the geotextile tubes eroded at the following rates: ♦ For the most recent year (May 2018 – September 2019), the unprotected areas showed a calculated net accretion of approximately 1,082 cy (Table 1a). This is equivalent to a distance-weighted average accretion rate of 1.2 cy/lf/yr. As discussed further below, this apparent accretion is within the vertical accuracy range of the survey and likely represents no net change. ♦ For the previous reporting period (August 2017 – May 2018), the unprotected areas eroded just over 17,000 cy (Table 1b). This is equivalent to a distance-weighted average of 17.4 cy/lf/yr. ♦ For the period from geotextile tube installation to the previous reporting period (July 2013 – August 2017), the unprotected areas eroded just over 23,700 cy (Table 1c). This is equivalent to a distance-weighted average of 5.8 cy/lf/yr. ♦ For the period from geotextile tube installation to the most recent survey (July 2013 – September 2019), the unprotected areas eroded a distance-weighted average equivalent of 6.8 cy/lf/yr (Table 1d). Table 1a Bluff Volume Loss in Unprotected Areas Adjacent to Geotextile Tubes for the Most Recent Year, May 15, 2018 - September 2019 Line Area Volume Eroded (CY) Length (Feet) Duration (Years) Annual Change (CY/LF/YR) 1 North Unprotected Area -797 802 1.0 -1.0 2 South Unprotected Area -285 138 1.0 -2.1 3 Total Bluff Erosion for Adjacent Unprotected Areas -1,082 -1.2 Note: A negative eroded volume correlates to accretion rate. See accompanying text; the calculated accretion is within the error range of the survey and likely represents no net change. 21597/Sconset 4 2019 Bluff Aerial Survey Report Epsilon Associates, Inc. Table 1b Bluff Volume Loss in Unprotected Areas Adjacent to Geotextile Tubes for the Previous Reporting Period, August 2017 - May 2018 Line Area Volume Eroded (CY) Length (Feet) Duration (Years) Annual Change (CY/LF/YR) 1 North Unprotected Area 14,229 802 1.0 17.7 2 South Unprotected Area 3,054 192 1.0 15.9 3 Total Bluff Erosion for Adjacent Unprotected Areas 17,283 17.4 Table 1c Bluff Volume Loss in Unprotected Areas Adjacent to Geotextile Tubes, July 2013 - August 2017 Line Area Volume Eroded (CY) Length (Feet) Duration (Years) Annual Change (CY/LF/YR) 1 North Unprotected Area 21,194 802 1.0 6.5 2 South Unprotected Area 2,523 192 1.0 3.2 3 Total Bluff Erosion for Adjacent Unprotected Areas 23,717 5.8 Table 1d Bluff Volume Loss in Unprotected Areas Adjacent to Geotextile Tubes for the Six Years since Geotextile Tube Installation, July 2013 - September 2019 Line Area Volume Eroded (CY) Length (Feet) Duration (Years) Annual Change (CY/LF/YR) 1 North Unprotected Area 35,423 802 6.0 7.3 2 South Unprotected Area 5,577 192 6.0 4.8 3 Total Bluff Erosion for Adjacent Unprotected Areas 41,000 6.8 Note: Bluff face accretion is shown in Table 1a for the 2019 Sand Year. As described in this report no net change is reported. therefore, a value of 0 was used for the 2019 Sand Year to calculate the 6-year average annual rate The 2018-2019 estimate of the annual change of sand volume from unprotected areas was calculated as -1.2 cy/lf/yr, which signifies accretion. However, we do not anticipate any accretion actually occurred on the bluff face in the adjacent unprotected areas. The calculated result presented in Table 2a may either: 1) represent a minor amount of sand accumulating at the toe of the bluff, or 2) represent values that are within the vertical accuracy range of the drone survey. The calculated change in volume correlates to approximately 0.4 feet (12.2 cm) of sand along the 940 feet of unprotected bluff. This change most likely reflects no net loss of unprotected bluff 21597/Sconset 5 2019 Bluff Aerial Survey Report Epsilon Associates, Inc. face with a minor amount of sand accumulation along the toe of the bluff. This result of no change to bluff face volume on the adjacent areas is consistent with the calm storm season. 3.2 Changes in Bluff Volume Above Geotextile Tubes The 2019 aerial survey was also used to calculate the changes in bluff volume above the geotextile tubes for the most recent year. No significant change in the bluff volume above the geotextile tubes was expected, because this portion of the bluff face is above the reach of storm waves and is also fully vegetated. The change in the bluff volume above the geotubes was calculated as approximately 587 cy of accretion; however, this accretion correlates to approximately 0.37 feet (11.3 cm), which is about the vertical accuracy range of the survey methods. This suggests that the small calculated change in bluff volume is within the vertical accuracy range and that there has been no net change to the bluff face above the template, which is as expected. 4.0 Volume of Sand in Template The volume of sand in the template was calculated by determining the total volume of the template at the time of the 2019 aerial survey and subtracting the known volume of sand within the geotextile tubes and returns located above the beach level. The total volume of sand above the beach level was 33,561 cy and the total volume of sand in the geotubes is 11,713 cy. This yields a sand cover volume in September 2019 of approximately 21,848 cubic yards, which correlates to 23 cy/lf for the 947-foot-long geotube system. Calculations were also performed of that portion of the sand template that is located above the fourth tier. Per the Project’s Order of Conditions, the sand on the top of the fourth tier is not counted as mitigation sand. This volume is calculated as approximately 3,790 cubic yards. It is anticipated that sand on top of the sand template, including sand on top of the fourth tier, will continue to be pushed down to re-cover the geotextile tubes as needed. Therefore, the volume above the fourth tier will become available through time. USGS, MassGIS G:\Projects\Lighthouse\2019\Lighthouse_2019_ArcPro\Lighthouse_2019_ArcPro.aprx 2018 to 2019 Sand Volume Comparison Figure 1 Baxter Road and Sconset Bluff Storm Damage Prevention Project Nantucket, Massachusetts Data Source: Office of Geographic Information (MassGIS), Commonwealth of Massachusetts, Information Technology Division Basemap: Orthophotography Provided by AirShark, MassGIS °0 112.5 225 Feet Scale 1:2,700 1 Inch = 225 Feet Net Gain Net Loss LEGEND 645cy Loss 930cy Gain 5,846cy Loss 6,643cy Gain 156cy Loss 743cy Gain Attachment C Excerpt from Southeast Nantucket Beach Monitoring, December 2019 80th Survey Report SOUTHEAST NANTUCKET BEACH MONITORING December 2019 80th SURVEY REPORT 107 Waterhouse Road Bourne, MA 02532 January 2020 Woods Hole Group, Inc. • A CLS Company Siasconset 80th Survey 2000-162 19 January 2020 “See Proprietary Note on Title Page” 3.3 LONG-TERM TRENDS To help visualize long-term trends at select profiles along the monitoring area, a series of figures illustrate cumulative change (feet) in shoreline position relative to a 1994 baseline position (zero on the vertical axis) over time on the horizontal axis for a representative subset of beach profiles. The figure captions include profile-specific observations. Nine (9) beach profiles are shown in Figures 5 through 13 to represent the stretch of beach subject to monitoring including: • Near the south of the monitoring area (Profile 84) • Approximately 1,000 ft and 500 ft south of the geotubes (Profiles 90 and 90.6) • Within the geotube area (Profiles 91, 91.5 and 92) • Approximately 500 ft and 1,000 ft north of the geotubes (Profiles 92.5 and 93) • Near the north end of the monitoring area (Profile S) Individual data points on each plot represent the change in shoreline position at mean low water (MLW), based on the surveyed beach profile at that time. Positive numbers indicate shoreline advance and negative numbers indicate shoreline retreat relative to the 1994 baseline (assumed zero). Blue dots represent data obtained from surveys before the installation of geotubes, while red dots represent data since geotube installation. The plots differentiate the pre- and post-geotube installation periods as a known geographic and temporal reference point highlighting results subject to the current regulatory requirements, and expected to be subject to future monitoring. The plots demonstrate temporal variability as can be seen with the following examples: • Periods of stability with little cumulative change in shoreline position as seen in Figure 5 from December of 1996 to May of 2002; • Periods of shoreline advance as seen in Figure 5 from May 2002 to February 2005; and • Periods of shoreline retreat as seen in Figure 6 from December 1996 to February 2005. General observations derived from the data plotted on Figures 5 through 13 are summarized below. This collection of long-term observations accentuates the high degree of variability at this site: • Each profile includes times of shoreline advance and shoreline retreat, demonstrating a high degree of variability on short and long-time scales. This high degree of variability, with observed short-term periods of erosion or accretion, suggests that adverse effects from the geotextile tubes could only be reliably determined through years of sustained erosion that deviate from historic observations. Woods Hole Group, Inc. • A CLS Company Siasconset 80th Survey 2000-162 20 January 2020 “See Proprietary Note on Title Page” • Each profile responds differently on variable time scales. • This variability does not lend itself to fitting a long-term trend line with a high degree of statistical accuracy. • The current November 2019 shoreline position at many profiles is generally similar (within about 20 feet) to the shoreline position in the ~2005-2008 timeframe. • The short-term variability shown by surveys since geotube installation in January 2014 is similar to short-term variability (~2-3 year periods) observed over many years of surveys before the geotubes were installed. Surveyed post-geotube shoreline changes are not materially different from previous observations as related to rates and duration of shoreline change. No accelerated erosion in excess of historical observations is evident. Figures 5 through 13 follows below with observations made for each profile. Figure 5. Cumulative Shoreline Change (ft) at Profile 84 since November 1994. • Figure 5 shows an overall shoreline advance of ~+110 ft since 1994 • Relatively stable shoreline position with modest retreat from 1996 to late 2001 • 200 ft of shoreline advance from September 2001 to January 2004 • Variable alternating periods of relative stability with modest shoreline advance and retreat spanning multiple years since 2004 • Relative stability since ~2013. Woods Hole Group, Inc. • A CLS Company Siasconset 80th Survey 2000-162 21 January 2020 “See Proprietary Note on Title Page” Figure 6. Cumulative Shoreline Change (ft) at Profile 90 since November 1994. • Figure 6 shows variable periods of shoreline retreat, stability, and advancement • Net shoreline erosion on the order of -110 ft since 1994 • Relatively consistent erosion from 1996 through April 2001; • Sharper short-term shoreline retreat between June 2005 and February 2006 • Shoreline advance from February 2006 to November, 2007 • Substantial trend of beach accretion from April 2011 to April 2014 • Relative stability since ~2013. Woods Hole Group, Inc. • A CLS Company Siasconset 80th Survey 2000-162 22 January 2020 “See Proprietary Note on Title Page” Figure 7. Cumulative Shoreline Change (ft) at Profile 90.6 since November 1994. • Figure 7 shows variable periods of shoreline erosion, stability, and accretion • General trend of shoreline erosion between 1996 and 2003 • Substantial advance from October 2003 to February 2005 • Sharp retreat from 2005 to 2006 • Net shoreline retreat on the order of -90 ft since 1994 • Current shoreline position similar to 2004, with relative stability since ~2013. Woods Hole Group, Inc. • A CLS Company Siasconset 80th Survey 2000-162 23 January 2020 “See Proprietary Note on Title Page” Figure 8. Cumulative Shoreline Change (ft) at Profile 91 since November 1994. • Figure 8 shows net shoreline loss since 1994 on the order of -110 ft • Substantial trend of beach erosion at variable rates through 2007 • Variable shoreline position since 2005 with reversing trends of beach accretion and erosion • Substantial shoreline advance from September 2012 to March 2013 • Little net change in the shoreline position since April 2007; similar to other profiles • Trend of milder shoreline erosion in September 2010 to September 2012, October 2003 to June 2005, and December 1998 to June 2000 • Current trend shows relative stability since before 2013. Woods Hole Group, Inc. • A CLS Company Siasconset 80th Survey 2000-162 24 January 2020 “See Proprietary Note on Title Page” Figure 9. Cumulative Shoreline Change (ft) at Profile 91.5 since November 1994. • Figure 9 shows net shoreline retreat on the order of -90 ft since 1994 • Relatively consistent long-term shoreline erosion from 1996 through September 2012; with short-term variability • Substantial beach accretion occurred from September 2012 to March 2013 • Current shoreline position similar to December 2012; the observation that the current shoreline position is similar to the condition 8-10 years ago is common to other profiles • Recent trend of relative beach stability since October 2015, and with similar shoreline position since before 2013. Woods Hole Group, Inc. • A CLS Company Siasconset 80th Survey 2000-162 25 January 2020 “See Proprietary Note on Title Page” Figure 10. Cumulative Shoreline Change (ft) at Profile 92 since November 1994. • Figure 10 shows net erosion on the order of -70 ft since 1994 • Current shoreline position similar to observations since 2005; similar to other profiles • Recent trend of beach stability since October 2015, and with similar shoreline position since before 2013. Woods Hole Group, Inc. • A CLS Company Siasconset 80th Survey 2000-162 26 January 2020 “See Proprietary Note on Title Page” Figure 11. Cumulative Shoreline Change (ft) at Profile 92.5 since November 1994. • Figure 11 shows net erosion on the order of -50 ft since 1994 • Current shoreline position similar to observations since 2005; similar to other profiles • Trend of beach stability for more than ~10 years. Woods Hole Group, Inc. • A CLS Company Siasconset 80th Survey 2000-162 27 January 2020 “See Proprietary Note on Title Page” Figure 12. Cumulative Shoreline Change (ft) at Profile 93 since November 1994. • Figure 12 shows relatively stable shoreline position since 1998 • Majority of net losses occurred between 1994 and 1998 • Net erosion on the order of -50 ft since 1994 Woods Hole Group, Inc. • A CLS Company Siasconset 80th Survey 2000-162 28 January 2020 “See Proprietary Note on Title Page” Figure 13. Cumulative Shoreline Change (ft) at Profile S since November 1994. • Figure 13 shows variable shoreline response • Net shoreline advance on the order of 25 ft since 1994 • Majority of accretion occurred up to 2011, with sharp periods of erosion between • Recent trend of beach stability since 2013. • As with other profiles, the current shoreline position similar to 2005 3.4 WAVE AND WATER LEVEL CONDITIONS For the current 80th survey, defined by the time period of September 4th, 2019 through November 27th, 2019, no nearshore wave data was available since the Woods Hole Oceanographic Institution’s (WHOI) Martha’s Vineyard Coastal Observatory (MVCO) was still not operational. Offshore wave data was taken from the National Oceanic and Atmospheric Administration’s (NOAA’s) National Data Buoy Center (NDBC) Station 44008, located 54 nautical miles southeast of Nantucket Island. At NDBC Station 44008, there were approximately twelve (12) significant wave events that exceed 1.5 m during the last three months with an overall energy-weighted average wave height for the time period of 2.7 meters, which is a significant increase since the last quarter. Three separate storms between September and November produced waves offshore that exceeded 7 m (22.5 ft) and the largest storm produced waves over 8 m between October 17th and 19th, indicative of a very energetic fall season. Attachment D Sconset Beach November 2019 Underwater Video Survey Reports Submitted to:Nantucket Conservation Commission2 Bathing Beach RoadNantucket, Massachusetts 02554 Submitted by:Siasconset Beach Preservation FundP.O. Box 2279Nantucket, Massachusetts 02584 February 18, 2020 Sconset Beach Underwater Video Survey Report Prepared by: Epsilon Associates, Inc. 3 Mill & Main Place, Suite 250 Maynard, Massachusetts 01754 CR Environmental, Inc. 639 Boxberry Road East Falmouth, Massachusetts 02536 Nantucket, MA Sconset Beach Underwater Video Survey Report Nantucket, MA Submitted to: Nantucket Conservation Commission Submitted by: Siasconset Beach Preservation Fund Prepared by: Epsilon Associates, Inc. CR Environmental, Inc. February 18, 2020 Table of Contents 21597/Sconset Geotextile Tube Project i Table of Contents Underwater Video Survey Report Epsilon Associates, Inc. Table of Contents UNDERWATER VIDEO SURVEY REPORT 2 1.0 Introduction 2 2.0 Vessel Operations, Navigation, and Survey Design 2 3.0 Survey Data Acquisition and Processing 3 4.0 Survey Results 4 4.1 Biota 5 4.2 Bottom Sediment Coverage 6 5.0 Conclusions 8 ATTACHMENT A Video Survey Maps Figure 1 Underwater Video Trackline Map Figure 2 Percent Cobble/Boulder Present at Trackline Intersections (November 2019) Figure 3 Percent Cobble/Boulder Present at Trackline Intersections (November 2018) Figure 4 Percent Cobble/Boulder Present at Trackline Intersections (June 2018) Figure 5 Percent Cobble/Boulder Present at Trackline Intersections (November 2017) Figure 6 Percent Cobble/Boulder Present at Trackline Intersections (June 2017) Figure 7 Percent Cobble/Boulder Present at Trackline Intersections (October 2016) Figure 8 Percent Cobble/Boulder Present at Trackline Intersections (June 2016) ATTACHMENT B Video Survey Screenshot Figures LIST OF TABLES Table 1 Sconset Beach Video Survey – Bottom Sediment Coverage and Biota Underwater Video Survey Report 21597/Sconset Geotextile Tube Project 2 Underwater Survey Report Epsilon Associates, Inc. UNDERWATER VIDEO SURVEY REPORT 1.0 Introduction On November 14, 2019, CR Environmental, Inc. (“CR”) and Epsilon Associates, Inc. (“Epsilon”) on behalf of the Siasconset Beach Preservation Fund (“SBPF”) conducted the autumn 2019 underwater video survey offshore from the geotube system, at the base of the bluff from 87-105 Baxter Road, Nantucket, MA. These geotubes were installed in December 2013 and January 2014 (with an approximate length of 852-feet) and were then expanded in November and December 2015 to a total length of 947-feet. As part of the Order of Conditions (DEP File No. SE48-2824) for the geotube project, underwater video monitoring is required as described in Special Conditions 28 of the Order of Conditions, which reads in part: “… Photographs and/or video shall be taken along the transects within the project area and the area directly adjacent to the project area. The underwater video shall be able to characterize the bottom sediments, species present and relative abundance including the calculating of the percent cobble where appropriate. …” The purpose of the underwater video survey monitoring is to evaluate if mitigation sand that washes off the sand template and carried into the littoral system, i.e. that sand on top of the geotextile tubes, is causing a significant alteration or loss of cobble/boulder habitat located directly offshore of the geotube system. The November 2019 survey marks the seventh underwater video survey since the geotubes were installed. This document describes the data acquisition and processing methods, equipment used for the survey, and survey results. 2.0 Vessel Operations, Navigation, and Survey Design The underwater video monitoring survey activity was conducted on November 14, 2019 from the 35-foot fishing vessel Althea K. The vessel was configured to accommodate navigation and video acquisition systems and was furnished with a portable generator to power survey electronics. The survey crew on the underwater video survey consisted of a boat captain and one mate, a field biologist, an oceanographic technician, and an environmental scientist. The survey was conducted to continue to visually to characterize bottom sediments, biota, and type of bottom cover offshore from the geotube project site (see Figures 1-8 in Attachment A). Navigation for the survey was accomplished using a Hemisphere VS-110 12-channel sub-meter (GPS) system. The GPS system was interfaced to a laptop computer running HYPACK 2013A hydrographic survey software. HYPACK recorded vessel position, water depth, and provided a steering display for the vessel captain. During the November 2019 survey, a total of nineteen (19) 3- to 5-minute video drifts were performed and bottom coverage was obtained at 33 of the 35 survey point intersections. The air temperature was between 35 to 40 degrees, wind speed at 5 to 10 knots, swells at 2 feet for the first three hours of the survey, which then increased to 10 to 15 knots with increased swells following the change in tide. Due to these workable ocean conditions, good quality underwater video data were obtained at most of the stations. At a few of the stations, the vessel was forced 21597/Sconset Geotextile Tube Project 3 Underwater Survey Report Epsilon Associates, Inc. to maneuver (power) in the seas to achieve the correct drift direction. In these cases, the video sled was at time towed sideways and the video data quality reduced. However, classification of the major substrate types and biota could still be performed by selecting the highest available video quality near each survey point intersection. 3.0 Survey Data Acquisition and Processing Underwater video operations were conducted using a real-time high-resolution color underwater video data acquisition system which permitted the characterization of bottom habitat and the species present. Maps showing the location of the video transects offshore are provided in Attachment A. Underwater video data were collected with CR’s portable towed video sled consisting of a lightweight aluminum frame, Outland Technologies’ high-resolution low light color camera, and two wide-angle 250-watt lights with variable output control. The video camera was cabled to the surface to an OTI-960 DVR recorder and topside monitor. A GoPro 4 Black color camera with internal data storage was also mounted to the towed sled and recorded footage simultaneously with the Outland camera as a second source of data. The video sled was lowered and raised using a lifting davit and lobster pot hauler mounted on the stern and the height of the system off the bottom was continually adjusted to achieve the best bottom coverage and video quality. The vessel speed varied between 0.5 to 1.7 knots. Mounted lasers on the video sled frame were used for scaling purposes, and a calibrated scale template was overlain on the video frame or screen captures. The distance between template grid lines in both the X and Y directions was equal to approximately 6 inches. This grid system permitted scaling and estimating of bottom biota and determining substrate classes and their percent coverage. When the video camera was one foot off the bottom, the viewing area of the camera was approximately 1.5 ft x 1.5 ft (18” x 18”) and the video quality was optimal for bottom sediment characterizations and biota identifications. HYPACK navigation files were recorded during each video drift. Video data were transferred to a processing computer and viewed by a staff scientist at Epsilon. Representative screen captures (frame images) were extracted along each video drift to characterize bottom sediments and biota offshore from the project. To analyze the bottom characteristics of each video drift, screenshots were taken at points as close as possible to the June 2017 survey’s seven shore-parallel and three shore-perpendicular transect intersections (Figure 6). The November 2019 survey collected video drifts over these intersections. In addition, coordinates for two previously-established, shore-perpendicular survey transects (90.6 and 92.5) were added to the figure, then screenshots were pulled from points nearest the June 2017 survey’s intersections between those two transects and the seven shore-parallel transects. Using the GPS data collected simultaneously with the video, the time stamps for each of these intersection points were extracted into a spreadsheet. The intersection coordinates were found by scrolling through the video until the time matched as closely as possible to the time recorded to the GPS data coordinates. Sometimes the view closest to the intersection point was not optimal due to the camera position being either too far from or too close to the bottom, or the 21597/Sconset Geotextile Tube Project 4 Underwater Survey Report Epsilon Associates, Inc. video sled was towing on its side so that the scale lasers were not visible. In these instances, a screenshot was captured as close as possible to the intersect position where the view was improved. The scale grid was overlain on the video view. Live video (not shown) was reviewed concurrent with the screenshots for the most accurate assessment of biota and bottom substrate. Once the scale grid was in place, the bottom coverage was classified along a gradient of grain sizes using the Auster hierarchical approach (Auster 1998). Bottom sediment and habitat types within the offshore area included: flat sand, sand ripples, sand waves, pebble, cobble, and boulder. The percent cover for bottom sediment types present in each screenshot was approximated using the scale grid. Each of the nine grid sections was reviewed and bottom sediment was categorized individually, then an average was calculated for the complete screenshot. The percent bottom type numbers were rounded to the nearest five percent for presentation in Table 1. To maintain consistency across the 33 screenshots, the same individual reviewed all final percent cover estimates concurrently with the live video. Each screenshot is given three identifiers in Table 1. First, the intersection location is indicated by the name of the transect, which is the same as the distance in feet from the shore (see Figure 1). The November 2019 intersection locations followed the November 2018 survey transect, therefore these distance labels are unchanged (see Figures 1 and 2). Second, the shore perpendicular transect that crosses the shore-parallel transect is listed. Lastly, each screenshot is given a number consistent with the order of all the past surveys’ intersection numbering (i.e. the November 2019 intersection numbering is consistent with all previous surveys, back to June 2016). 4.0 Survey Results Table 1 provides the bottom sediment coverage and biota present in the underwater video drifts collected in November 2019 offshore from the geotube system. Screenshots captured from the underwater video are numbered 1-35 (excluding 15 and 29) and are presented in Attachment B – Video Survey Screenshot Figures. Note, the November 2019 screenshot numbering 1-35 corresponds to the intersection numbers depicted on Figure 1 – Underwater Video Trackline Map, found in Attachment A – Figures. Results of each screenshot are tabulated in terms of bottom sediment coverage percentages and biota. Screenshots between intersection numbers 1 through 21 were taken at intersection locations between shore-parallel and shore-perpendicular survey transects established for the underwater video monitoring, while screenshots between intersection numbers 22 through 35 used shore-perpendicular transect locations taken from the previously established Woods Hole Group shoreline monitoring transects. Table 1 provides an assessment of the biota present and the bottom type at each of the 35 screenshot locations. 21597/Sconset Geotextile Tube Project 5 Underwater Survey Report Epsilon Associates, Inc. 4.1 Biota During the underwater video survey, 13 invertebrate species, one fish species, and five marine plant and algal species were observed. The dominant biota across all transects included unidentified branching brown algae, unidentified branching red algae, Irish moss red algae, rockweed brown algae, hydroids, barnacles, common slipper shells, bread crumb sponge, sulfur (boring) sponge, and hermit crabs. Additional biota observed at the transect intersections included northern star coral, orange encrusting bryozoan, red beard sponge, rock crab, surf clam shell, and unidentified shell fragments. Additionally, while either not captured or identifiable in the intersection screenshots, the following biota were observed during the video survey fieldwork: moonsnail, sand shrimp, common skate and egg casing, and scallop shell. ♦ Branching brown and red algae were abundant and were observed in the entire survey area. This was likely Irish moss and rockweed algae, which are often difficult to distinguish if the camera is not close or the sled speed is not slow enough. ♦ Sulfur sponge and hydroids were abundant and were found in nearly every transect, with the exception of the transect closest to shore: TR-250. ♦ Hermit crabs were the most abundant and were observed across the whole survey area and were observed mostly in the offshore cobble/boulder environment. ♦ Bread crumb sponge was abundant and was found in all transect, but not identified at every intersection. ♦ Common slipper shells were abundant in the entire survey area, mostly beyond 700 feet offshore. ♦ Moonsnails were observed in transect TR-725 near intersections 8, 9, and 31. ♦ Rock crabs were observed in all transects, except for the two closest to shore: TR-250 and TR-415. ♦ Sand shrimp were observed in transect TR-250 near intersections 1 and 22. ♦ Common skate was observed in transect TR-1915 and a skate egg case was seen near intersection 28. Overall, the November 2019 survey continues to show a biologically productive habitat is located just offshore from the geotube bank stabilization system. The June 2016, October 2016, June 2017, November 2017, June 2018, and November 2019 surveys had similar dominant biota of branching brown and red algae, sulfur sponge, bread crumb sponge, and common slipper shells. Besides some expected seasonal variability of the species present, the November 2019 survey had results consistent with the dominant biota observed in 2016, 2017, and 2018 and there is no indication of adverse effect of marine biota from the geotube system and sand contributed off the sand template. 21597/Sconset Geotextile Tube Project 6 Underwater Survey Report Epsilon Associates, Inc. 4.2 Bottom Sediment Coverage In addition to biota, Table 1 lists the bottom coverage types observed in the survey area. The bottom sediment categories include sand flat, sand waves, sand ripples, pebble, cobble, and boulder. An additional category shows the cobble and boulder percentage combined into one percentage. These percentages were combined to show a more representative picture of the bottom substrate differences across the survey area. These combined data were used to create Figure 2, which shows the abundance of cobble/boulder from the November 2019 survey. The cobble/boulder surface was calculated using a geoprocessing tool that interpolates a surface from points using an inverse distance weighted (IDW) technique1. The percentage of cobble/boulder coverage ranges from green gradients colors (0-24%), to blue gradient colors (25-69%), and finally to red gradient colors (70-100%) (Figure 2). The percent cobble/boulder coverage varies significantly across the survey area, from <10% to 80%. In November 2019, most of the survey area has 25-54% cobble/boulder coverage. A comparison was made between this November 2019 survey and the 2016, 2017, and 2018 survey results. An understanding of the natural variability in the nearshore environment provides important context for interpreting results between surveys. Although the presence of cobble/boulder habitat is widespread just offshore from the geotextile tubes, there is significant natural variability within this habitat. As explained in the October 2016 survey report, the percent cobble/boulder coverage can vary by 20% or more when reviewing video from locations even one or two seconds (this time correlates to about 4 to 10 feet) either before or after the intersection point selected for screenshot capture. While each survey collects video data along similar transects, it is nearly impossible to collect video data at absolutely identical locations between surveys, due to both minor variation in the position of the vessel during video survey data collection and due to the occasional need to adjust screenshot capture locations by one or two seconds in order to capture the clearest view. Accordingly, some variation is expected in the cobble/boulder percent cover in each survey, since each survey will represent slightly different locations. With these considerations in mind, the results of the November 2019 survey were compared with the previous six surveys conducted in June 2016, October 2016, June 2017, November 2017, June 2018, and November 2018. Following are the key findings from this comparison: ♦ All seven surveys showed that most of the sampling area had 25-54% cobble coverage. ♦ All seven surveys indicated that the nearshore survey areas had the lowest cobble/boulder percent coverage, from <10% to 24%. ♦ The cobble/boulder cover was found to increase further offshore. In the November 2019, November 2018, June 2018, November 2017, and June 2017 surveys, the increased cobble/boulder cover started to closer to shore (at about 415 feet offshore) than in the 1 The November 2019 figure shows an IDW interpolation with a fixed search radius that included all 33 intersection points. 21597/Sconset Geotextile Tube Project 7 Underwater Survey Report Epsilon Associates, Inc. June 2016 and October 2016 surveys (where increased cobble/boulder coverage was observed starting around 700 feet offshore). ♦ All seven surveys identified the same general areas as having the highest concentration of cobble/boulder: o June 2016 intersections 9, 11, 12, 15, 33, and 35 has 65-90% cobble/boulder coverage. o October 2016 intersections 9, 11, 15, 22, and 25 had 65-90% cobble/boulder coverage. o June 2017 intersections 6, 8, 9, 11, 13, 33, and 35 had 65-85% cobble/boulder coverage. o November 2017 intersections 8, 13, 18, 33, and 35 had 65-85% cobble/boulder coverage. o June 2018 intersections 7, 8, 11, 12, 13, 15, 17, 18, 33, and 35 had 65-100% cobble/boulder coverage. o November 2018 intersections 8, 9, 11, 13, 15, 18, 31, 33, and 35 had 65-100% cobble/boulder coverage. o November 2019 intersections 8, 9, 14, 15, 16, 18, 33, and 35 had 65-80% cobble/boulder coverage. While these results were generally consistent with each other, there was some variation. As explained above, the differences in percent cobble/boulder coverage between the six surveys are considered to be the results of natural variability. A couple locations where the percent cobble/boulder appeared to decrease in November 2019 from the previous surveys (intersections 11, 13, and 30) were checked and were within 10% of the past four surveys. Intersections 6, 14, 16, 20, 21, 23, 25, 28, and 34 showed increased cobble/boulder percentages than the previous surveys with a difference of 5-10%. Intersection 27 showed increased cobble/boulder percentage of approximately 15% but was checked and was lower than the percent cobble/boulder in June 2018 and the same percent cover in November 2017. These observations suggest that the apparent difference between the two 2016 surveys, the two 2017 surveys, the two 2018 surveys, and the 2019 survey reflects the slightly different locations 21597/Sconset Geotextile Tube Project 8 Underwater Survey Report Epsilon Associates, Inc. chosen for screenshot capture between the seven surveys and is not indicative of change in cobble/boulder habitat. Overall, the November 2019 underwater video survey indicates that a productive widespread cobble/boulder habitat area is located just offshore from the geotextile tubes, and there is no indication that such habitat is being covered by the sand mitigation. 5.0 Conclusions An underwater video survey of the area located just offshore of the geotube system and surrounding areas was conducted in November 2019, approximately 6 years after the installation of the geotextile tubes at the base of the bluff. During this survey, 13 invertebrate species, one fish species, and five marine plant and algal species were observed. The dominant biota across all transects included branching brown algae, branching red algae, hydroids, barnacles, common slipper shells, bread crumb sponge, sulfur sponge, and hermit crabs. Besides some expected seasonal variability of the species present, the November 2019 survey continues to show biologically productive benthic habitat just offshore from the geotextile tubes, and there is no indication of adverse effect on marine biota from the geotextile tube project. The bottom sediment type was also surveyed. The percent cobble/boulder coverage varied significantly across the survey area, from <10% to 80% with increasing percentage of cobble/boulder coverage correlated with increasing distance offshore. The November 2019 survey results were broadly consistent with the survey results from 2016, 2017, and 2018: most of the survey area in November 2019 had 25-54% cobble/boulder coverage, similar to the previous surveys, and localized areas of higher cobble coverage were found at similar locations in all seven surveys. While some variation was found between the seven surveys, an analysis of survey results described in the October 2016 survey report showed that the percentage of cobble/boulder coverage at video locations within just a few feet of one another could vary by up to 20-30%, indicating that much of the observed differences between the seven surveys can be attributed to natural variability. Based on the continued prevalence of cobble/boulder habitat located directly offshore of the geotextile tube Project, there is no evidence that cobble/boulder habitat is being covered by the mitigation sand. As described in the June 2016 report, the volume of the sand template is minimal compared to the volume of native sand moving in the littoral system and shoal movements. It is our ongoing recommendation that a reduction in the frequency of underwater video monitoring is warranted. Regular monitoring to date indicates that mitigation sand is not contributing to the loss of, or covering of, cobble/boulder substrate. Flat Sand/Sand Waves/Sand Ripples Pebble Cobble Boulder TR-250 91.9 1 55 5 30 10 40 Unidentified Branching Brown and Red Algae, Common Slipper Shells, Hermit Crabs, Bread Crumb Sponge, Northern Star Coral TR-250 91.35 2 TR-250 91 3 100 0 0 0 0 Unidentified Floating Algae TR-415 91.9 4 95 0 5 0 5 Unidentified Branching Brown and Red Algae, Unidentified Floating Algae TR-415 91.35 5 80 0 20 0 20 Rockweed, Unidentified Branching Algae, Hydroids, Northern Star Coral, Hermit Crabs, Shell Hash TR-415 91 6 40 0 35 25 60 Rockweed, Unidentified Branching Brown and Red Algae, Shell Hash, Hermit Crabs, Red Beard Sponge, Barnacles TR-725 91.9 7 55 0 15 30 45 Irish Moss, Unidentified Branching Brown and Red Algae, Common Slipper Shells, Orange Encrusting Bryozoan, Hydroids, Barnacles, Sulfur Sponge, Bread Crumb Sponge TR-725 91.35 8 30 0 10 60 70 Unidentified Branching Brown and Red Algae, Common Slipper Shells, Shell Hash, Rock Crab, Hermit Crabs, Sulfur Sponge TR-725 91 9 25 5 25 45 65 Rockweed, Irish Moss, Unidentified Branching Brown and Red Algae, Common Slipper Shells, Shell Hash, Hermit Crab, Sulfur Sponge, Bread Crumb Sponge TR-1050 91.9 10 20 55 25 0 25 Rockweed, Irish Moss, Common Slipper Shells, Shell Hash, Unidentified Branching Brown and Red Algae, Clam Shell No Data Available Table 1. Sconset Beach Video Survey November 14, 2019 - Bottom Sediment Coverage and Biota Shore-Parallel Transect # Shore- Perpendicular Transect # Screenshot Label Bottom Sediment Coverage (Percent)Cobble + Boulder (Percent) Biota Page 1 of 4 Flat Sand/Sand Waves/Sand Ripples Pebble Cobble Boulder Shore-Parallel Transect # Shore- Perpendicular Transect # Screenshot Label Bottom Sediment Coverage (Percent)Cobble + Boulder (Percent) Biota TR-1050 91.35 11 45 5 5 45 50 Rockweed, Irish Moss, Unidentified Branching Brown and Red Algae, Shell Hash, Hermit Crab, Unidentified Floating Algae TR-1050 91 12 40 10 0 50 50 Unidentified Branching Brown and Red Algae, Common Slipper Shell, Bread Crumb Sponge, Shell Hash, Moon Snail, Hermit Crabs TR-1300 91.9 13 45 5 15 35 50 Rockweed, Irish Moss, Unidentified Branching Brown and Red Algae, Unidentified Floating Red Algae, Sulfur Sponge, Bread Crumb Sponge, Hydroids, Shell Hash TR-1300 91.35 14 15 15 35 35 70 Unidentified Branching Brown and Red Algae, Sulfur Sponge, Bread Crumb Sponge, Common Slipper Shells TR-1300 91 15 5 25 60 10 70 Unidentified Branching Brown and Red Algae, Sulfur Sponge, Bread Crumb Sponge, Hydroids, Common Slipper Shells, Hermit Crabs TR-1595 91.9 16 10 20 55 15 70 Rockweed, Irish Moss, Unidentified Branching Brown and Red Algae, Orange Encrusting Bryozoan, Sulfur Sponge, Bread Crumb Sponge, Hydroids, Northern Star Coral, Hermit Crab, Common Slipper Shells TR-1595 91.35 17 5 40 55 0 55 Unidentified Branching Brown and Red Algae, Sulfur Sponge, Bread Crumb Sponge, Orange Encrusting Bryozoan, Hydroids, Northern Star Coral, Barnacles, Common Slipper Shells TR-1595 91 18 15 20 40 25 65 Unidentified Branching Brown and Red Algae, Sulfur Sponge, Bread Crumb Sponge, Common Slipper Shells, Shell Hash Page 2 of 4 Flat Sand/Sand Waves/Sand Ripples Pebble Cobble Boulder Shore-Parallel Transect # Shore- Perpendicular Transect # Screenshot Label Bottom Sediment Coverage (Percent)Cobble + Boulder (Percent) Biota TR-1915 91.9 19 35 25 30 10 40 Unidentified Branching Brown and Red Algae, Sulfur Sponge, Red Beard Sponge, Bread Crumb Sponge, Hermit Crab, Hermit Crab, Common Slipper Shells, Shell Hash TR-1915 91.35 20 40 10 15 35 50 Irish Moss, Unidentified Branching Brown and Red Algae, Sulfur Sponge, Bread Crumb Sponge, Red Beard Sponge, Barnacles TR-1915 91 21 50 15 35 0 35 Unidentified Branching Brown and Red Algae, Bread Crumb Sponge, Sulfur Sponge, Clam Shell, Common Slipper Shells TR-250 92.5 22 80 0 20 0 20 Unidentified Floating Algae, Unidentified Branching Brown and Red Algae, Hermit Crab TR-415 92.5 23 60 0 15 25 40 Unidentified Branching Brown and Red Algae, Hydroids, Shell Hash TR-725 92.5 24 65 0 15 20 35 Rockweed, Irish Moss, Unidentified Branching Brown and Red Algae, Shell Hash, Hydroids, Barnacles TR-1050 92.5 25 45 10 25 20 45 Unidentified Branching Red Algae, Barnacles, Sulfur Sponge, Bread Crumb Sponge, Red Beard Sponge, Common Slipper Shell, Shell Hash TR-1300 92.5 26 0 65 35 0 35 Unidentified Branching Brown and Red Algae, Bread Crumb Sponge, Common Slipper Shells, Hermit Crab TR-1595 92.5 27 65 0 30 5 35 Irish Moss, Unidentified Branching Brown and Red Algae, Sulfur Sponge, Common Slipper Shells, Hermit Crab, Barnacles TR-1915 92.5 28 45 20 30 5 35 Irish Moss, Unidentified Branching Brown and Red Algae, Common Slipper Shells, Sulfur Sponge, Red Beard Sponge, Moon Snail, Hermit Crab TR-250 90.6 29 No Data Available Page 3 of 4 Flat Sand/Sand Waves/Sand Ripples Pebble Cobble Boulder Shore-Parallel Transect # Shore- Perpendicular Transect # Screenshot Label Bottom Sediment Coverage (Percent)Cobble + Boulder (Percent) Biota TR-415 90.6 30 70 0 20 10 20 Unidentified Branching Red and Brown Algae, Unidentified Floating Algae, Common Slipper Shells, Bread Crumb Sponge, Hermit Crabs, Orange Encrusting Bryozoan, Hydroids, Shell Hash, Clam Shell TR-725 90.6 31 45 0 15 40 55 Unidentified Branching Brown and Red Algae, Hydroids, Bread Crumb Sponge, Red Beard Sponge, Orange Encrusting Bryozoan TR-1050 90.6 32 5 60 10 25 35 Unidentified Branching Brown and Red Algae, Common Slipper Shells, Sulfur Sponge, Shell Hash, Hydroids, Northern Star Coral, Hermit Crab TR-1300 90.6 33 25 5 40 30 70 Unidentified Branching Brown and Red Algae, Barnacles, Bread Crumb Sponge, Orange Encrusting Bryozoan TR-1595 90.6 34 0 60 30 10 40 Unidentified Branching Brown and Red Algae, Sulfur Sponge, Bread Crumb Sponge, Common Slipper Shells, Shell Hash, Hermit Crab, Northern Star Coral, Red Beard Sponge TR-1915 90.6 35 5 15 65 15 80 Unidentified Branching Brown and Red Algae, Bread Crumb Sponge, Red Beard Sponge, Barnacles, Common Slipper Shells, Shell Hash, Hermit Crab Page 4 of 4 Attachment A Video Survey Maps Figure 1 Underwater Video Trackline Map Figure 2 Percent Cobble/Boulder Present at Trackline Intersections (November 2019) Figure 3 Percent Cobble/Boulder Present at Trackline Intersections (November 2018) Figure 4 Percent Cobble/Boulder Present at Trackline Intersections (June 2018) Figure 5 Percent Cobble/Boulder Present at Trackline Intersections (November 2017) Figure 6 Percent Cobble/Boulder Present at Trackline Intersections (June 2017) Figure 7 Percent Cobble/Boulder Present at Trackline Intersections (October 2016) Figure 8 Percent Cobble/Boulder Present at Trackline Intersections (June 2016) 92.5 90.6 TR-91.9 TR-91.35 TR-91.13 TR-725 TR-1,300 TR-1,595 TR-415 TR-250 TR-1,915 TR-1,050 3 1 22 30 6 5 23 31 9 8 7 24 25 10 11 12 32 26 13 14 15 33 27 16 17 18 34 28 19 21 35 204 G:\Projects\Lighthouse\2019\2019_Underwater_Survey\MXD\Underwater_Video_Transects_20200117.mxd Figure 1Underwater Video Trackline Map Sconset Beach Video Survey Nantucket, Massachusetts LEGEND Basemap: 2018 World Imagery, ESRI °0 375 750 Feet1 inch = 750 feet Scale 1:9,000 Transect Survey Point Intersection Shoreline Survey Transects Video Drift Transects (November 2019) Video Drift Transects (June 2017) Geotube Area N orth A tl a nti c OceanService Layer Credits: Source: Esri,DigitalGlobe, GeoEye, EarthstarGeographics, CNES/Airbus DS, USDA,USGS, AeroGRID, IGN, and the GISUser Community Notes: -Transects 92.5 and 90.6 were not video drifttransects and were added to the figure so thatcoordinates could be pulled.-Transects TR-91.9, TR-91.35, and TR-91.13 areJune 2017 video drift transects and were added to the figure so that coordinates could be pulled.-The NAD27 Datum was used for consistency with Woods Hole Group Shoreline Surveys. TR-725 TR-1,300 TR-1,595 TR-415TR-250 TR-1,915 TR-1,050 TR-91.13 TR-91.35 TR-91.9 92.5 90.6 TR-725 TR-1,300 TR-415TR-250 3 1 22 30 6 5 23 31 9 8 7 24 25 10 11 12 32 26 13 14 15 33 27 16 17 18 34 28 19 21 35 204 G:\Projects\Lighthouse\2019\2019_Underwater_Survey\MXD\Percent_Cobble_Boulder_Transects_20200119.mxd Figure 2Percent Cobble/Boulder Present at Trackline Intersections (November 2019) Sconset Beach Video Survey Nantucket, Massachusetts LEGEND Basemap: 2018 World Imagery, ESRI °0 375 750 Feet1 inch = 750 feet Scale 1:9,000 Transect Survey Point Intersection Shoreline Survey Transects Video Drift Transects (November 2019) Video Drift Transects (June 2017) Geotube Area Service Layer Credits: Source: Esri,DigitalGlobe, GeoEye, EarthstarGeographics, CNES/Airbus DS, USDA,USGS, AeroGRID, IGN, and the GISUser Community Notes: -Transects 92.5 and 90.6 were not video drifttransects and were added to the figure so thatcoordinates could be pulled.-Transects TR-91.9, TR-91.35, and TR-91.13 areJune 2017 video drift transects and were added to the figure so that coordinates could be pulled.-The NAD27 Datum was used for consistency with Woods Hole Group Shoreline Surveys. % Cobble/Boulder 0-9% 10-24% 25-39% 40-54% 55-69% 70-84% 85-100% N ort h A tl a nti c Ocean !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !( !(!( !( !( !( !( !( !(!( !( !( !( !( !( TR-725 TR-1,300 TR-1,595 TR-415TR-250 TR-1,915 TR-1,050 TR-91.13 TR-91.35 TR-91.9 90.6 92.5 22 23 24 25 26 27 28 19161310741 2 5 8 11 14 17 20 21 33 34 12 31 63 9 15 18 29 30 32 35 G:\Projects\Lighthouse\2018\2018_Underwater_Video\MXD\Percent_Cobble_Boulder_Transects_20190221.mxd Figure 3 Percent Cobble/Boulder Present at Trackline Intersections (November 2018) Sconset Beach Video Survey Nantucket, Massachusetts LEGEND Basemap: 2017 World Imagery, ESRI °0 375 750 Feet1 inch = 750 feet Scale 1:9,000 !(Transect Survey Point Intersection Shoreline Survey Transects Video Drift Transects (November 2018) Video Drift Transects (June 2017) Geotube Area N orth A tl a nti c OceanNotes: -Transects 92.5 and 90.6 were not video drifttransects and were added to the figure so thatcoordinates could be pulled.-Transects TR-91.9, TR-91.35, and TR-91.13 areJune 2017 video drift transects and were added to the figure so that coordinates could be pulled.-The NAD27 Datum was used for consistency with Woods Hole Group Shoreline Surveys. % Cobble/Boulder 0-9% 10-24% 25-39% 40-54% 55-69% 70-84% 85-100% 92.5 90.6 TR-91.9 TR-91.35 TR-91.13 TR-1,050 TR-1,915 TR-250 TR-415 TR-1,595 TR-1,300 TR-725 6 5 4 9 8 7 3 2 12 11 10 15 14 13 18 17 16 20 19 21 30 31 29 32 33 34 23 24 22 25 26 27 35 28 1 G:\Projects\Lighthouse\2018\2018_Underwater_Video\MXD\Percent_Cobble_Boulder_Transects_20180607.mxd Figure 4 Percent Cobble/Boulder Present at Trackline Intersections (June 2018) Sconset Beach Video Survey Nantucket, Massachusetts LEGEND Basemap: 2017 World Imagery, ESRI °0 375 750 Feet1 inch = 750 feet Scale 1:9,000 Transect Survey Point Intersection Shoreline Survey Transects Video Drift Transects Geotube Area N orth A tl a nti c OceanNotes: -Transects 92.5 and 90.6 were not video drifttransects and were added to the figure so thatcoordinates could be pulled.-Transects TR-91.9, TR-91.35, and TR-91.13 areJune 2017 video drift transects and were added to the figure so that coordinates could be pulled.-The NAD27 Datum was used for consistency with Woods Hole Group Shoreline Surveys. % Cobble/Boulder 0-9% 10-24% 25-39% 40-54% 55-69% 70-84% 85-100%TR-91.9 TR-91.35 TR-91.13 24 26 28 7 14 2322 41 52 3 6 29 30 31 32 33 34 35 21 15 9 25 10 8 11 17 19 2013 27 16 1812 G:\Projects\Lighthouse\2017\2017_Underwater_Survey\MXD\Percent_Cobble_Boulder_20171116_30.mxd Figure 5 Percent Cobble/Boulder Present at Trackline Intersections (November 2017) Sconset Beach Video Survey Nantucket, Massachusetts LEGEND Basemap: ESRI World Imagery °0 375 750 Feet1 inch = 750 feet Scale 1:9,000 N orth A tl a nti c OceanNote: -Transects 92.5 and 90.6 were not video drift transects and were added to the figure so that coordinates could be pulled-The NAD27 Datum was used for consistency with Woods Hole Group Shoreline Surveys 92.5 90.6 TR-91.9 TR-91.35 TR-91.13 TR-1,050 TR-1,915 TR-250 TR-415 TR-1,595 TR-1,300 TR-725 Transect Survey Point Intersection Video Drift Transects Shoreline Survey Transects Video Drift Transects (June 2017) Geotube Area% Cobble/Boulder 0-9% 10-24% 25-39% 40-54% 55-69% 70-84% 85-100% Transect Survey Point Intersection(no data collection November 2017) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 G:\Projects\Lighthouse\2017\2017_Underwater_Survey\MXD\Percent_Cobble_Boulder_20170928.mxd Figure 6 Percent Cobble/Boulder Present at Trackline Intersections (June 2017) Sconset Beach Video Survey Nantucket, Massachusetts LEGEND Basemap: 2016 NAIP Imagery, USDA FSA °0 375 750 Feet1 inch = 750 feetScale1:9,000 Transect Survey Point Intersection Shoreline Survey Transects Video Drift Transects Geotube Area% Cobble/Boulder 0-9% 10-24% 25-39% 40-54% 55-69% 70-84% 85-100% N orth A tl a nti c OceanNote: -Transects 92.5 and 90.6 were not video drift transects and were added to the figure so that coordinates could be pulled-The NAD27 Datum was used for consistency with Woods Hole Group Shoreline Surveys 92.5 90.6 TR-91.9 TR-91.35 TR-91.13 TR-1,050 TR-1,915 TR-250 TR-415 TR-1,595 TR-1,300 TR-725 TR-91.9 TR-91.35 TR-710 TR-1,265 TR-1,590 TR-400TR-250 TR-1,925 TR-1,020 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 G:\Projects\Lighthouse\2016\Percent_Cobble_Boulder_20161221.mxd Figure 7 Percent Cobble/Boulder Present at Trackline Intersections (October 2016) Sconset Beach Video Survey Nantucket, Massachusetts Data Source: Office of Geographic Information (MassGIS), Commonwealth of Massachusetts, Information Technology Division LEGEND °0 350 700 Feet1 inch = 700 feet Scale 1:8,400 Screenshot Location Video Drift Transects Shoreline Survey Transects Geotube Area % Cobble/Boulder 0-9% 10-24% 25-39% 40-54% 55-69% 70-84% 85-100% 90.6 92.5 TR-91.9 TR-91.35 TR-91.13 NorthAtlanticOcean Note: -Transects 92.5 and 90.6 were not videodrift transects and were added to the figureso that coordinates could be pulled-The NAD27 Datum was used for consistency withWoods Hole Group Shoreline Surveys Basemap: 2013 Orthophotography, MassGIS TR-91.9 TR-91.35 TR-91.13 TR-220 TR-370 TR-720 TR-1,020 TR-1,280 TR-1,580 TR-1,900 N orth A t la n ti c Oc e an18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 21 20 19 343332313029 35 272625242322 28 G:\Projects\Lighthouse\2016\Percent_Cobble_Boulder_20161012.mxd Figure 8 Percent Cobble/Boulder Present at Trackline Intersections (June 2016) Sconset Beach Video Survey Nantucket, Massachusetts Data Source: Office of Geographic Information (MassGIS), Commonwealth of Massachusetts, Information Technology Division LEGEND 0 350 700 Feet1 inch = 700 feet Scale1:8,400 Screenshot Location Video Drift Transects Shoreline Survey Transects Geotube Area % Cobble/Boulder 0-10% 10-25% 25-40% 40-55% 55-70% 70-85% 85-100% 90.6 92.5 Note: -Transects 92.5 and 90.6 were not videodrift transects and were added to the figureso that coordinates could be pulled-The NAD27 Datum was used for consistency withWoods Hole Group Shoreline Surveys Attachment B Video Survey Screenshot Figures 1 (Sand 55%, Pebble 5%, Cobble 30%, Boulder 10%) Unidentified Branching Brown and Red Algae, Common Slipper Shells, Hermit Crabs, Bread Crumb Sponge, Northern Star Coral 3 (Sand Waves 100%) Unidentified Floating Algae 4 (Sand Waves 95%, Cobble 5%) Unidentified Branching Brown and Red Algae, Unidentified Floating Algae 5 (Sand Waves 80%, Cobble 20%) Rockweed, Unidentified Branching Algae, Hydroids, Northern Star Coral, Hermit Crabs, Shell Hash 6 (Sand 40%, Cobble 35%, Boulder 25%) Rockweed, Unidentified Branching Brown and Red Algae, Shell Hash, Hermit Crabs, Red Beard Sponge, Barnacles 7 (Sand 55%, Cobble 15%, Boulder 30%) Irish Moss, Unidentified Branching Brown and Red Algae, Common Slipper Shells, Orange Encrusting Bryozoan, Hydroids, Barnacles, Sulfur Sponge, Bread Crumb Sponge 8 (Sand 30%, Cobble 10%, Boulder 60%) Unidentified Branching Brown and Red Algae, Common Slipper Shells, Shell Hash, Rock Crab, Hermit Crabs, Sulfur Sponge 9 (Sand 25%, Pebble 5%, Cobble 20%, Boulder 45%) Rockweed, Irish Moss, Unidentified Branching Brown and Red Algae, Common Slipper Shells, Shell Hash, Hermit Crab, Sulfur Sponge, Bread Crumb Sponge 10 (Sand 20%, Pebble 55%, Cobble 25%) Rockweed, Irish Moss, Common Slipper Shells, Shell Hash, Unidentified Branching Brown and Red Algae, Clam Shell 11 (Sand 45%, Pebble 5%, Cobble 5%, Boulder 45%) Rockweed, Irish Moss, Unidentified Branching Brown and Red Algae, Shell Hash, Hermit Crab, Unidentified Floating Algae 12 (Sand 40%, Pebble 10%, Boulder 50%) Unidentified Branching Brown and Red Algae, Common Slipper Shell, Bread Crumb Sponge, Shell Hash, Moon Snail, Hermit Crabs 13 (Sand 45%, Pebble 5%, Cobble 15%, Boulder 35%) Rockweed, Irish Moss, Unidentified Branching Brown and Red Algae, Unidentified Floating Red Algae, Sulfur Sponge, Bread Crumb Sponge, Hydroids, Shell Hash 14 (Sand 15%, Pebble 15%, Cobble 35%, Boulder 35%) Unidentified Branching Brown and Red Algae, Sulfur Sponge, Bread Crumb Sponge, Common Slipper Shells 15 (Sand 5%, Pebble 25%, Cobble 60%, Boulder 10%) Unidentified Branching Brown and Red Algae, Sulfur Sponge, Bread Crumb Sponge, Hydroids, Common Slipper Shells, Hermit Crabs 16 (Sand 10%, Pebble 20%, Cobble 55%, Boulder 15%) Rockweed, Irish Moss, Unidentified Branching Brown and Red Algae, Orange Encrusting Bryozoan, Sulfur Sponge, Bread Crumb Sponge, Hydroids, Hermit Crab, Common Slipper Shells 17 (Sand 5%, Pebble 40%, Cobble 55%) Unidentified Branching Brown and Red Algae, Sulfur Sponge, Bread Crumb Sponge, Orange Encrusting Bryozoan, Hydroids, Northern Star Coral, Barnacles, Common Slipper Shells 18 (Sand 15%, Pebble 20%, Cobble 40%, Boulder 25%) Unidentified Branching Brown and Red Algae, Sulfur Sponge, Bread Crumb Sponge, Common Slipper Shells, Shell Hash 19 (Sand 35%, Pebble 25%, Cobble 30%, Boulder 10%) Unidentified Branching Brown and Red Algae, Sulfur Sponge, Red Beard Sponge, Bread Crumb Sponge, Hermit Crab, Hermit Crab, Common Slipper Shells, Shell Hash 20 (Sand 40%, Pebble 10%, Cobble 15%, Boulder 35%) Irish Moss, Unidentified Branching Brown and Red Algae, Sulfur Sponge, Bread Crumb Sponge, Red Beard Sponge, Barnacles 21 (Sand 50%, Pebble 15%, Cobble 35%) Unidentified Branching Brown and Red Algae, Bread Crumb Sponge, Sulfur Sponge, Clam Shell, Common Slipper Shells 22 (Sand Waves 80%, Cobble 20%) Unidentified Floating Algae, Unidentified Branching Brown and Red Algae, Hermit Crab 23 (Sand 60%, Cobble 15%, Boulder 25%) Unidentified Branching Brown and Red Algae, Hydroids, Shell Hash 24 (Sand 65%, Cobble 15%, Boulder 20%) Rockweed, Irish Moss, Unidentified Branching Brown and Red Algae, Shell Hash, Hydroids, Barnacles 25 (Sand 45%, Pebble 10%, Cobble 25%, Boulder 20%) Unidentified Branching Red Algae, Barnacles, Sulfur Sponge, Bread Crumb Sponge, Red Beard Sponge, Common Slipper Shell, Shell Hash 26 (Pebble 65%, Cobble 35%) Unidentified Branching Brown and Red Algae, Bread Crumb Sponge, Common Slipper Shells, Hermit Crab 27 (Sand 65%, Cobble 30%, Boulder 5%) Irish Moss, Unidentified Branching Brown and Red Algae, Sulfur Sponge, Common Slipper Shells, Hermit Crab, Barnacles 28 (Sand 45%, Pebble 20%, Cobble 30%, Boulder 5%) Irish Moss, Unidentified Branching Brown and Red Algae, Common Slipper Shells, Sulfur Sponge, Red Beard Sponge, Moon Snail, Hermit Crab 30 (Sand 70%, Cobble 20%, Boulder 10%) Unidentified Branching Red and Brown Algae, Unidentified Floating Algae, Common Slipper Shells, Bread Crumb Sponge, Hermit Crabs, Orange Encrusting Bryozoan, Hydroids, Shell Hash, Clam Shell 31 (Sand 45% Cobble 15%, Boulder 40%) Unidentified Branching Brown and Red Algae, Hydroids, Bread Crumb Sponge, Red Beard Sponge, Orange Encrusting Bryozoan 32 (Sand 5%, Pebble 60%, Cobble 10%, Boulder 25%) Unidentified Branching Brown and Red Algae, Common Slipper Shells, Sulfur Sponge, Shell Hash, Hydroids, Northern Star Coral, Hermit Crab 33 (Sand 25%, Pebble 5%, Cobble 40%, Boulder 30%) Unidentified Branching Brown and Red Algae, Barnacles, Bread Crumb Sponge, Orange Encrusting Bryozoan 34 (Pebble 60%, Cobble 30%, Boulder 10%) Unidentified Branching Brown and Red Algae, Sulfur Sponge, Bread Crumb Sponge, Common Slipper Shells, Shell Hash, Hermit Crab, Northern Star Coral, Red Beard Sponge 35 (Sand 5%, Pebble 15%, Cobble 65%, Boulder 15%) Unidentified Branching Brown and Red Algae, Bread Crumb Sponge, Red Beard Sponge, Barnacles, Common Slipper Shells, Shell Hash, Hermit Crab Attachment E Drainage System Annual Report 20 Mary Ann Drive • Nantucket, MA 02554 508-825-5053 • www.NantucketEngineer.com January 29, 2020 Dwight Dunk, PWS, BCES - Principal Epsilon Associates, Inc. 3 Mill & Main Place, Suite 250 Maynard, Massachusetts 01754 RE: SBPF - Baxter Road Drainage System Monitoring Dear Dwight: We have been monitoring the function of the stormwater drainage system near 87 Baxter Road, in accordance with the Stormwater Operation and Maintenance Plan. The system appears to be functioning as designed, and we do not have any immediate concerns. There is approximately eight-inches of accumulated sediment in the base of the catchbasin, which is below the threshold for cleaning. We will continue to monitor the system. There is some sediment along the gutter line of Baxter Road which we recommend be swept and removed from the area. Please feel free to contact me with any questions or concerns regarding this matter. Sincerely, Nantucket Engineering & Survey, P.C. By: Arthur D. Gasbarro, PE, PLS CC: Josh Posner, SBPF