Loading...
HomeMy WebLinkAboutRiverwalk Site Monitoring 2025-04-01 MEMORANDUM BETA GROUP, INC. www.BETA-Inc.com BACKGROUND On April 1, 2025, BETA staff visited the Yarmouth Riverwalk Park Site located at 669 Route 28 in Yarmouth, MA to perform environmental monitoring during the Phase 1 construction period. The purpose of this inspection was to document conditions of the salt marsh, erosion controls and park during Phase 1 of construction. The following was observed during the inspection: BOARDWALK/SALT MARSH Areas of the salt marsh where wetland matting was placed adjacent to the constructed boardwalk were observed as being sparsely vegetated. The eastern side of the boardwalk (Photo 2) was observed as having more areas of sparse vegetation compared to the western side (Photo 3). Some of these sparsely vegetated areas were also flooded. Within these areas, root systems of grass species (Spartina spp.) were present, indicating some ongoing vegetative establishment. Crabs were also observed as burrowing throughout the sparsely vegetated areas (Photo 5). Areas of the salt marsh will continue to be monitored to ensure that full restoration is achieved. Additionally, one area of residual grout /concrete was observed beneath the eastern side of the boardwalk that requires removal (Photo 4). EROSION CONTROLS Throughout the site, erosion controls were observed in varying stages of biodegradation. Erosion controls adjacent to the salt marsh on the eastern side of the boardwalk are in poor condition and require replacement because the filter tubes are torn (Photo 1). Erosion controls adjacent to the salt marsh on the western side of the boardwalk were observed in good condition. Two (2) layers of erosion controls consisting of silt fence and compost filter tubes are present throughout a majority of the site. In some locations, the compost filter tubes were observed in degraded conditions (Photo 6). If silt fence is removed, new compost filter tubes should be installed in locations where degraded compost filter tubes are present. Erosion controls adjacent to the Parkers River near the upweller require replacement as the compost filter tube has failed and no silt fence is present in this location (Photo 7). Date: April 14, 2025 Job No.: 22.10056.00 To: Amanda Lima, PE Town Engineer Kathy Williams, PE, Town Planner Brittany DiRienzo, Conservation Administrator From: Arek Galle, RLA, AICP, Senior Associate, BETA Group Prepared: Anna Haznar, Staff Scientist, BETA Group Subject: Yarmouth Riverwalk Park and Boardwalk Phase 1 Yarmouth, MA Site Monitoring April 14, 2025 Page 2 of 2 RIVERWALK PARK Currently, the Riverwalk Park is under construction. Throughout the park, areas of exposed soil with rill erosion were observed (Photo 8 and 9). Generally, areas of exposed soil were observed to have erosion controls in good condition downgradient, with the exception of the location near the upweller. Once construction is completed in locations of exposed soil, stabilization should commence. Two (2) areas of concrete that require disposal were observed throughout the park (Photo 10). The concrete and impacted underlying soil should be removed and disposed of in accordance with the SWPPP. During this inspection, no significant invasive species pressure was observed; however, the site should continue to be monitored for success of the invasive species removal plan. SUMMARY Currently, the Yarmouth Riverwalk Park and Boardwalk Project is under construction. Observations made during the April 1, 2025, inspection include the following:  Sparsely vegetated areas are present within the salt marsh adjacent to the boardwalk that should be monitored this season for reestablishment,  Erosion/sediment controls throughout the site are in varying conditions,  Areas of exposed soil are present at the site but generally have erosion controls downgradient,  Erosion controls adjacent to the upweller require replacement, and  Multiple areas of residual concrete requiring proper disposal are present throughout the site. Attachments: - Photographic Documentation - Site Aerial Image PHOTOGRAPHIC DOCUMENTATION Yarmouth Riverwalk Yarmouth, Massachusetts Photographs Documented April 1, 2025 Photo 2 Typical view of a sparsely vegetated area adjacent to the eastern side of the boardwalk – facing south. View of the erosion controls under the eastern side of the boardwalk adjacent to the salt marsh —facing northeast. Photo 1 PHOTOGRAPHIC DOCUMENTATION Yarmouth Riverwalk Yarmouth, Massachusetts Photographs Documented April 1, 2025 Photo 4 View of an area of concrete within the salt marsh requiring removal. Typical view of a sparsely vegetated area adjacent to the western side of the boardwalk—facing south. Photo 3 PHOTOGRAPHIC DOCUMENTATION Yarmouth Riverwalk Yarmouth, Massachusetts Photographs Documented April 1, 2025 Photo 6 Typical view of erosion controls throughout the site– facing south. View of crab burrowing holes and grass roots within a sparsely vegetated area. Photo 5 PHOTOGRAPHIC DOCUMENTATION Yarmouth Riverwalk Yarmouth, Massachusetts Photographs Documented April 1, 2025 Photo 8 View of rill erosion in exposed soil with erosion controls in good condition – facing north. View of erosion controls requiring replacement near the upweller—facing east. Photo 7 PHOTOGRAPHIC DOCUMENTATION Yarmouth Riverwalk Yarmouth, Massachusetts Photographs Documented April 1, 2025 Photo 10 View of an area of concrete requiring removal– facing north. View of another area of rill erosion—facing west. Photo 9 Yarmouth Riverwalk Park — June 17, 2025 Yarmouth Riverwalk Park — June 17, 2025 偨潴漠㄰