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HomeMy WebLinkAboutRevised Plan Request - Corten Wall (2025-01-09) Infrastructure Northeast 100 Nickerson Road, Marlborough, MA 01752 Tel 508.786.2200 Fax 508.786.2201 tetratech.com January 9, 2025 Darcy Karle, Conservation Administrator Barnstable Conservation Commission 230 South Street Hyannis, MA 02601 Re: Revised Plan Request – Corten Wall Cabana Patio Project (SE3-6134) 1500 Main Street Cotuit, MA Dear Ms. Karle: This letter, completed Form R, and attached supporting documentation requests Commission approval of a minor plan revision to the above-referenced Order of Conditions to include installation of a free-standing sculptural “Corten Steel” wall in the outer 50 feet of the 100-foot buffer zone at the subject property. The wall is comprised of three (3) curved sections proposed within landscaped portions of the front yard, two of which are located on the upland side of the existing site driveway including a small portion outside of jurisdiction. The proposed location of the wall in relation to the Cabana Patio (SE3-6134) work is shown on the attached Project Locus - Figure 1 and a copy of the Order of Conditions is attached. Landscape architect renderings of the wall are attached, and the wall has been staked in the field in case the Commission or its staff conduct a site visit. We are requesting the plan revision to reduce the number of outstanding Orders of Conditions at the subject property and since the work is relatively limited in scale. Additionally, the wall is located within areas of improved landscape, completely outside the 0-50’ buffer zone, and separated from the resource area by a large swath of woods resulting in virtually no risk of impact to the resource area. The following more specifically describes the work which is shown on the attached Corten Wall Site Plan – Figure 2. Resource Area Boundary: Resource area boundaries are taken from the prior Notice of Intent submittal for the Driveway Gates (SE3-5396) which encompassed the same general work area. A copy of our 2022 request for certificate of compliance for that project is attached for reference. Work: The work includes (1) excavating a 4’(W) x 4’(D) trench to construct the wall’s concrete footing, (2) erection of prefabricated wall sections, and (3) surface repairs and finish landscape improvements. The footing will be constructed using a backhoe or small excavator and excavated material will be removed immediately from the site. Wall panels will be delivered to the site by truck and erected with a mobile crane staged from the driveway. All surfaces will be returned to their original condition or otherwise landscaped as indicated on Figure 2 following installation of the sculpture wall and any areas disturbed during construction will be repaired immediately. Schedule: We anticipate installation of the foundation and wall sculpture will take approximately 15-20 days after which all materials and equipment will be removed and any areas disturbed during installation will be repaired immediately. Erosion Controls: A row of 12” compost filter tube will be installed as shown on the attached plan to ensure any erosion or sediment is contained and to otherwise define the limit of work (excluding groundcover Revised Plan Request – Corten Wall Cabana Patio Project (SE3-6134) January 9, 2025 TETRA TECH 2 Infrastructure Northeast planting). Potential for erosion or sedimentation is extremely limited given excavated material will be removed immediately and runoff in the vicinity of the work will be captured within the footing trench. Erosion controls will remain in place until the sculpture wall is installed, and all related repair work is complete. Materials required for the construction will be staged within the paved parking area immediately east of the work area. The parking area is bounded by a stone wall ensuring no materials or unintended activity will extend beyond the staging area. Any equipment or material not fitting within the parking area will be stored at the adjoining Rushy Marsh Farm property outside of jurisdiction and moved to the project site when needed or when adequate space is available in the staging area. The parking/staging area is shown on Figure 1. Proposed sedimentation and erosion controls are shown on the attached Corten Wall Erosion Control Plan – Figure 3. Mitigation: The work will result in less than 20 square feet of new impervious surface (1” wall) within the 50- 100’ wetland buffer requiring 60 sf of mitigation planting (3:1 ratio) per requirements of the Town of Barnstable Wetlands Protection Bylaw (Ch. 237). The proposed work includes conversion of more than 2,000 sf of lawn or otherwise sparsely vegetated ground to a dense ivy ground cover which more than offsets the 20 square- foot impact. The approximate limits of the proposed ivy groundcover are shown on Figure 2. Enclosed is a completed Form R, supporting documentation (including two (2) stamped original Figures 1-3), a check in the amount of $50 and eight (8) collated copies of the request. We would appreciate being added to the agenda of your earliest available hearing regardless of time or date. If you have any questions or require any additional information, please don’t hesitate to contact me directly by phone at 508-786-2230 or by email at sean.reardon@tetratech.com. Very truly yours, Sean P. Reardon, P.E. Vice President, Tetra Tech Attachments: • Form R • Figures 1-3 • Renderings • SE3-5396 COC Request • SE3-6134 OOC Copy. M. Ford – Ford & Ford Atty. 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