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North_Farms_Road_NOI_Updated_20221019.pdfNotice of Intent Application WE 246-0763 Revised 10/19/22 372 North Farms Road Florence, Massachusetts Submitted April 2022 File No. 15.0166938.00 PREPARED FOR: Laura Minsky & Brahm Wilson 372 North Farms Road Florence, MA GZA GeoEnvironmental, Inc. 1350 Main Street, Suite 1400 │ Springfield, MA 01103 413-726-2100 Offices Nationwide www.gza.com Copyright© 2022 GZA GeoEnvironmental, Inc. An Equal Opportunity Employer M/F/V/H October 19, 2022 GZA File No. 15.0166938.00 Northampton Conservation Commission Office of Planning and Sustainability 210 Main Street Northampton, MA 01060 RE: Notice of Intent Application 372 North Farms Road Florence, Northampton, MA Dear Conservation Commission Members: On behalf of Laura Minsky and Brahm Wilson (Applicant and Owners), GZA GeoEnvironmental, Inc. (GZA) is pleased to submit the enclosed revised Notice of Intent narrative and updated site plans for a proposed development at 372 North Farms Road, Florence, Northampton, MA. The Applicant is proposing to construct an ancillary structure to an existing single-family home , replace an existing septic system, remove an attached garage, and remove an asphalt driveway. The proposed work is within a resource area under the jurisdiction of the Massachusetts Wetlands Protection Act and accompanying regulations and the City of Northampton Wetlands Protection Ordinance. The enclosed material provides an updated project layout to meet Riverfront Area Redevelopment standards and show the location of the proposed septic system. If you have any questions, please feel free to contact Joseph Rogers at 413-218-2959 (joseph.rogers@gza.com) Very truly yours, GZA GeoEnvironmental, Inc. Joseph Rogers, MS, PWS, CESSWI Daniel M. Nitzsche, CPESC, CESSWI, SE Project Manager Consultant / Reviewer Stephen Lecco, AICP, CEP Principal-in-Charge CC with attachments: MassDEP-WERO Ms. Laura Minsky October 19, 2022 372 North Farms Road, Notice of Intent Narrative 15.0166938.00 TOC | i TABLE OF CONTENTS COVER COVER LETTER 1.0 INTRODUCTION .............................................................................................................................................1 2.0 EXISTING CONDITIONS ...................................................................................................................................1 2.1 REGULATED WETLAND RESOURCES ............................................................................................................. 1 2.2 OTHER RESOURCE AREAS ............................................................................................................................. 2 3.0 PROPOSED WORK ..........................................................................................................................................2 4.0 COMPLIANCE WITH REGULATIONS .................................................................................................................3 FIGURES FIGURE 1 LOCUS MAP FIGURE 2 AERIAL MAP APPENDICES APPENDIX A WPA Form 3 –Notice of Intent APPENDIX B Site Plan APPENDIX C Site Photographs APPENDIX D Abutter Notification Information October 19, 2022 372 North Farms Road, Notice of Intent Narrative 15.0166938.00 Page | 1 1.0 INTRODUCTION On behalf of Laura Minsky and Brahm Wilson (Applicant and Owners), GZA GeoEnvironmental, Inc. (GZA) has prepared this Notice of Intent (NOI) narrative for the proposed development at 372 North Farms Road, Florence, Northampton, MA (the “Project”) (Figures 1 & 2). The Project includes construction of an ancillary structure to an existing single-family home at the Site, the replacement of the septic system, the demolition of a garage, and the removal of an existing asphalt driveway. The work is located within the Riverfront Area (RA) and is subject to review by the City of Northampton Conservation Commission (Commission) pursuant to the Massachusetts Wetlands Protection Act (WPA; M.G.L. c. 131 § 40) and its companion regulations (WPA, 310 CMR 10.00) and the City of Northampton Wetlands Protection Ordinance (“Ordinance”, Code of Ordinances, Part II: General Legislation, Chapter 337 Wetlands Protection). A WPA Form 3 – Notice of Intent application is provided in Appendix A. 2.0 EXISTING CONDITIONS The Site is approximately 1.5 acres located on the west side of North Farms Road (Figure 2). Currently, the Site is developed with a house, fenced yard, and double driveway located in the eastern half of the property with a combination of maintained lawn and forested areas in the western half of the Site. A stone wall and topographic break separate the house from the western portion of the Site. The property slopes down from east to the west. Broad Brook, a perennial stream, traverses the western side of the property and flows from north to south. Based upon our site observations, the area immediately surrounding Broad Brook is forested with red maple (Acer rubrum), sugar maple (Acer saccharum), white pine (Pinus strobus), and white ash (Fraxinus americana). The understory is largely absent, and where present was predominantly comprised of immature red maple seedlings. The herbaceous layer along Broad Brook is sparsely arranged and appears to be dependent on openings in the tree canopy for sunlight. The predominant vegetation includes dame’s rocket (Hesperis matronalis), jewel weed (Impatiens capensis), and garlic mustard (Alliaria petiolata). Representative photos are included in Appendix C. 2.1 REGULATED WETLAND RESOURCES A wetland scientist from GZA completed a wetland delineation of the Site on May 20, 2021. The wetland delineation methodology was consistent with the resource definitions in 310 CMR 10.00. Consistent with Delineating Bordering Vegetated Wetlands Under the Massachusetts Wetlands Protection Act: A Handbook, S. Jackson, K.W. Peterson, R.W. Golledge, Jr., and R. Tomczyk. Boston, MA., Massachusetts Department of Environmental Protection, Division of Wetlands and Waterways; and Corps of Engineers Wetland Delineation Manual, Environmental Laboratory. Technical Report Y-87- 1. U.S. Army Engineer Waterways Experiment Station, Vicksburg, MS; Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Northcentral and Northeast Region, ed. J.S. Wakely, R.W. Lichvar, and C. C. Noble; ERDC/EL TR-12-1. Vicksburg, MS: U.S. Army Engineer Research and Development Center (Version 2.0), no bordering vegetated wetlands were delineated onsite above the mean annual high-water elevation. The delineation identified a portion of Broad Brook Riverfront Area (RA) as defined at 310 CMR 10.58(2). The delineated RA is assumed to support (5) of the eight (8) interests of the Wetland Protection Act regulations described at 310 CMR 10.01(2) including Protection of Wildlife Habitat, Flood Control, Prevention of Pollution, Storm Damage Prevention, and potentially Groundwater Protection. Figure 2 depicts the resource areas and photographs are included in Appendix C. October 19, 2022 372 North Farms Road, Notice of Intent Narrative 15.0166938.00 Page | 2 GZA demarcated the mean annual high-water line (MAHW) based on observed field indicators including bank undercuts, changes in slope, and changes in vegetation. The MAHW is the start of the RA that extends into the adjacent upland areas from Broad Brook. The MAHW delineation was coincident with the top of the Bank resource, as defined at 310 CMR 10.54(2). The Bank has a 100-feet regulated Buffer Zone; however, per 310 CMR 10.58(4)(a), the RA performance standards are considered protective of the Buffer Zone and shall be met in lieu of any other Buffer Zone requirements. 2.2 OTHER RESOURCE AREAS GZA reviewed MassGIS (available at https://maps.massgis.digital.mass.gov/MassMapper/MassMapper.html) to assess other resources present onsite. The findings are summarized in the table below. Table 1: Summary of Resources Onsite Resource Present Areas of Critical Environmental Concern (ACEC) No Outstanding Resource Waters (ORWs) No Zone I or Zone II Wellhead Protection Area No Priority Habitat for Rare and Endangered Species No Certified Vernal Pools No FEMA Floodplains No 3.0 PROPOSED WORK Within the inner RA (0-100’) the proposed work is limited to the planting of twelve (12) native shrubs within a 800 square foot area along the Bank to enhance the wildlife habitat value and result in an improvement to the RA over existing conditions. Within the outer RA (100-200’), the proposed work includes: the construction of a new ancillary building; a permeable path to connect the new building to the new parking area (outside of RA); short path to connect the existing home to the new parking area (outside of RA); the demolition of an existing garage at the west end of the existing home; the removal of the existing asphalt double driveway and associated walkway; the replacement of an existing septic system. Erosion controls consisting of straw wattle, compost fiber tube, or similar will be installed approximately along the 100- foot buffer/inner RA line shown on the attached plan. The driveway asphalt and garage will be removed and disposed of off-site. The old septic system will be disconnected and filled or removed from the site and the new system installed within the existing lawn area of the outer RA. The system is designed to comply with 310 CMR 10.58(6)(c). Impacts to the existing trees in the front lawn will be avoided to the extent possible during the septic installation. At least one tree is expected to need to be removed based on the anticipated disruption of its root system during the installation. Minor grading will be needed on the downslope side of the septic system as shown in the attached plan. Trenching of the septic line will take place between the house, the proposed accessory structure, and the replaced septic system. Loam will be added as needed to the former driveway area after the completion of the septic replacement and seeded to match the existing grade of the surrounding lawn. Any temporarily disturbed portions of the lawn will be re-loamed and seeded to match existing grades. A new parking area is proposed in the northeast portion of the property outside the RA. All of the temporarily disturbed areas within the outer RA will be seeded and maintained as lawn/yard space and enhanced with native plantings October 19, 2022 372 North Farms Road, Notice of Intent Narrative 15.0166938.00 Page | 3 The proposed work is depicted in Appendix B, Site Plan and the existing and proposed RA alterations are summarized in Table 2. There are 59,248 square feet (SF) of Riverfront Area on the property and in accordance with the WPA regulations, the allowable area for development is 5,925 SF (10%). Prior to the start of earth work, appropriate sedimentation control materials will be installed as shown on the Site Plan. These materials will be maintained until disturbed areas are stabilized with vegetation. Table 2: Summary of Work Resource Area Activity Existing (SF) Impervious Proposed (SF) Impervious Inner RA (0-100’) Riverfront Enhancement Planting (800 SF) Outer RA (100- 200’) House, Driveway, Walkway 5,450 5,450 Removal of Driveway and Walk (-3,435) Removal of Garage (-275) Removal of Main House Path (-56) Construction of Ancillary Building and Heat Pump +820 Construction of Ancillary Building Path +240 Construction of House Path +32 Total -- 5,450 (9.2%) 2,776 (4.7%) 4.0 COMPLIANCE WITH REGULATIONS The proposed work is subject to review under 310 CMR 10.58(5). The Ordinance does not provide additional Riverfront Area performance standards or requirements over and above 310 CMR 10.58(5); therefore, Tables 3 and 4 details compliance with the performance standards of both the WPA and the Ordinance. Table 3: Compliance with Performance Standards, 310 CMR 10.58(5) Performance Standard Project Compliance Discussion (a)Improvement of RA over existing conditions Yes The proposed project includes the removal of 2,674 SF of impervious surfaces from the RA and the conversion of that area to lawn/landscape plantings. An additional 272 SF of the property will be maintained as permeable pathways. Approximately 800 SF of RA along Broad Brook will also be enhanced with native plantings. (b)Stormwater management meets standards Yes While this project is exempt from the stormwater management standards, the reduction of impervious surfaces on the property and enhancement through native plantings is anticipated to result in a benefit on the property. (c)Within 200-foot riverfront areas, proposed work shall not be located closer to the river than existing conditions or 100 feet, whichever is less, or not closer than existing conditions within 25- foot riverfront areas, except in accordance with 310 CMR 10.58(5)(f) or (g). Yes The final proposed footprint of the auxiliary structure will not be located closer to the river than the existing conditions. October 19, 2022 372 North Farms Road, Notice of Intent Narrative 15.0166938.00 Page | 4 (d)Proposed work, including expansion of existing structures, shall be located outside the riverfront area or toward the riverfront area boundary and away from the river, except in accordance with 310 CMR 10.58(5)(f) or (g). Yes The project is designed to comply with 310 CMR 10.58(5)(c), involves a reduction in total degraded area and mitigation through native plantings within the inner riparian corridor. (e)The area of proposed work shall not exceed the amount of degraded area, provided that the proposed work may alter up to 10% if the degraded area is less than 10% of the riverfront area, except in accordance with 310 CMR 10.58(5)(f) or (g). Yes The proposed work associated with this project shall not exceed the existing degraded area or exceed 10%. The degraded area on the property is currently 9.2% of the RA. The proposed project will reduce the amount of impervious surface area on the property to 4.7% of RA. (f)When an applicant proposes restoration on-site of degraded riverfront area, alteration may be allowed notwithstanding the criteria of 310 CMR 10.58(5)(c), (d), and (e) at a ratio in square feet of at least 1:1 of restored area to area of alteration not conforming to the criteria. N/A N/A (g)When an applicant proposes mitigation either on-site or in the riverfront area within the same general area of the river basin, alteration may be allowed notwithstanding the criteria of 310 CMR 10.58(5)(c), (d), or (e) at a ratio in square feet of at least 2:1 of mitigation area to area of alteration not conforming to the criteria or an equivalent level of environmental protection where square footage is not a relevant measure. N/A As part of this project, the applicant is proposing the conversion of 2,674 SF of impervious areas with the outer RA to lawn and landscaping with the addition of native species. Additionally, the applicant is also proposing the enhancement of approximately 800 SF of inner RA along Broad Brook by planting native shrubs. While not required we believe that this satisfies 310 CMR 10.58(5)(a) and meets the spirit of equivalent level of environmental protection described in 310 CMR 10.58(5)(g). (h)The issuing authority shall include a continuing condition in the Certificate of Compliance for projects under 310 CMR 10.58(5)(f) or (g) prohibiting further alteration within the restoration or mitigation area, except as may be required to maintain the area in its restored or mitigated condition. Yes The applicant accepts that the 800 SF area of RA enhancement is intended to remain undisturbed. The location was chosen to easily identify and maintain its boundaries. 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