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NOI Package_final.pdf NOTICE OF INTENT DRAIN OUTFALL RESTORATION MASS CENTRAL RAIL TRAIL NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS NOVEMBER 17, 2023 DEPARTMENT OF PUBLIC WORKS 125 LOCUST STREET NORTHAMPTON, MASSACHUSETTS NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_final.docx | Page 2 TABLE OF CONTENTS WPA Form 3 – Notice of Intent 1 Introduction ................................................................................................................................................................ 4 2 General Site Description .......................................................................................................................................... 4 2.1 Site Conditions .................................................................................................................................................. 4 2.2 Wetland Resource Areas .................................................................................................................................. 5 3 Proposed Project ........................................................................................................................................................ 5 3.1 Wetland Impacts ............................................................................................................................................... 6 4 Alternatives Analysis ................................................................................................................................................. 9 4.1 Hydrologic & Hydraulic Evaluation .............................................................................................................. 9 4.2 Preferred Alternative Selection ..................................................................................................................... 12 5 Other Permits ........................................................................................................................................................... 12 APPENDICES A. Maps & Plans i. USGS Locus Map ii. Aerial Photo of Project Site iii. Project Plans iv. 1978 Plan B. BVW Delineation Forms C. Basin Design Calculations D. Photographs E. List of Abutters NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_final.docx | Page 3 WPA FORM 3 – NOTICE OF INTENT wpaform3.doc • rev. 6/18/2020 Page 1 of 9 4 Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands WPA Form 3 – Notice of Intent Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 Provided by MassDEP: MassDEP File Number Document Transaction Number City/Town Important: When filling out forms on the computer, use only the tab key to move your cursor - do not use the return key. Note: Before completing this form consult your local Conservation Commission regarding any municipal bylaw or ordinance. A. General Information 1. Project Location (Note: electronic filers will click on button to locate project site): a. Street Address b. City/Town c. Zip Code Latitude and Longitude: d. Latitude e. Longitude f. Assessors Map/Plat Number g. Parcel /Lot Number 2. Applicant: a. First Name b. Last Name c. Organization d. Street Address e. City/Town f. State g. Zip Code h. Phone Number i. Fax Number j. Email Address 3. Property owner (required if different from applicant): Check if more than one owner a. First Name b. Last Name c. Organization d. Street Address e. City/Town f. State g. Zip Code h. Phone Number i. Fax Number j. Email address 4. Representative (if any): a. First Name b. Last Name c. Company d. Street Address e. City/Town f. State g. Zip Code h. Phone Number i. Fax Number j. Email address 5. Total WPA Fee Paid (from NOI Wetland Fee Transmittal Form): a. Total Fee Paid b. State Fee Paid c. City/Town Fee Paid Northampton Mass Central Rail Trail Northampton 01060 42.33119 -72.64270 City of Northampton Department of Public Works 125 Locust St Northampton MA 01060 413-584-1570 413-584-1576 kbaker@northamptonma.gov $0 (exempt)$0 (exempt)$0 (exempt) 237, 04224A, 24B wpaform3.doc • rev. 6/18/2020 Page 2 of 9 4 Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands WPA Form 3 – Notice of Intent Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 Provided by MassDEP: MassDEP File Number Document Transaction Number City/Town A. General Information (continued) 6. General Project Description: 7a. Project Type Checklist: (Limited Project Types see Section A. 7b.) 1. Single Family Home 2. Residential Subdivision 3. Commercial/Industrial 4. Dock/Pier 5. Utilities 6. Coastal engineering Structure 7. Agriculture (e.g., cranberries, forestry) 8. Transportation 9. Other 7b. Is any portion of the proposed activity eligible to be treated as a limited project (including Ecological Restoration Limited Project) subject to 310 CMR 10.24 (coastal) or 310 CMR 10.53 (inland)? 1. Yes No If yes, describe which limited project applies to this project. (See 310 CMR 10.24 and 10.53 for a complete list and description of limited project types) 2. Limited Project Type If the proposed activity is eligible to be treated as an Ecological Restoration Limited Project (310 CMR10.24(8), 310 CMR 10.53(4)), complete and attach Appendix A: Ecological Restoration Limited Project Checklist and Signed Certification. 8. Property recorded at the Registry of Deeds for: a. County b. Certificate # (if registered land) c. Book d. Page Number B. Buffer Zone & Resource Area Impacts (temporary & permanent) 1. Buffer Zone Only – Check if the project is located only in the Buffer Zone of a Bordering Vegetated Wetland, Inland Bank, or Coastal Resource Area. 2. Inland Resource Areas (see 310 CMR 10.54-10.58; if not applicable, go to Section B.3, Coastal Resource Areas). Check all that apply below. Attach narrative and any supporting documentation describing how the project will meet all performance standards for each of the resource areas altered, including standards requiring consideration of alternative project design or location. Northampton x x Northampton DPW proposes to reconfigure and reconstruct a storm drain outfall that crosses under the Mass Central Rail Trail and drains to Barrett Street Marsh.The project aims to reduce erosion in the streamand wetland downstream of the outfall. x 10.53(3)(k) - maintenance and repair of road drainage structures Hampshire 2274 282 wpaform3.doc • rev. 6/18/2020 Page 3 of 9 4 Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands WPA Form 3 – Notice of Intent Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 Provided by MassDEP: MassDEP File Number Document Transaction Number City/Town B. Buffer Zone & Resource Area Impacts (temporary & permanent) (cont’d) For all projects affecting other Resource Areas, please attach a narrative explaining how the resource area was delineated. Resource Area Size of Proposed Alteration Proposed Replacement (if any) a. Bank 1. linear feet 2. linear feet b. Bordering Vegetated Wetland 1. square feet 2. square feet c. Land Under Waterbodies and Waterways 1. square feet 2. square feet 3. cubic yards dredged Resource Area Size of Proposed Alteration Proposed Replacement (if any) d. Bordering Land Subject to Flooding 1. square feet 2. square feet 3. cubic feet of flood storage lost 4. cubic feet replaced e. Isolated Land Subject to Flooding 1. square feet 2. cubic feet of flood storage lost 3. cubic feet replaced f. Riverfront Area 1. Name of Waterway (if available) - specify coastal or inland 2. Width of Riverfront Area (check one): 25 ft. - Designated Densely Developed Areas only 100 ft. - New agricultural projects only 200 ft. - All other projects 3. Total area of Riverfront Area on the site of the proposed project: square feet 4. Proposed alteration of the Riverfront Area: a. total square feet b. square feet within 100 ft. c. square feet between 100 ft. and 200 ft. 5. Has an alternatives analysis been done and is it attached to this NOI? Yes No 6. Was the lot where the activity is proposed created prior to August 1, 1996? Yes No 3. Coastal Resource Areas: (See 310 CMR 10.25-10.35) Note: for coastal riverfront areas, please complete Section B.2.f. above. Northampton x x x 147 147 565 565 1 1 wpaform3.doc • rev. 6/18/2020 Page 4 of 9 4 Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands WPA Form 3 – Notice of Intent Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 Provided by MassDEP: MassDEP File Number Document Transaction Number City/Town B. Buffer Zone & Resource Area Impacts (temporary & permanent) (cont’d) Check all that apply below. Attach narrative and supporting documentation describing how the project will meet all performance standards for each of the resource areas altered, including standards requiring consideration of alternative project design or location. Online Users: Include your document transaction number (provided on your receipt page) with all supplementary information you submit to the Department. Resource Area Size of Proposed Alteration Proposed Replacement (if any) a. Designated Port Areas Indicate size under Land Under the Ocean, below b. Land Under the Ocean 1. square feet 2. cubic yards dredged c. Barrier Beach Indicate size under Coastal Beaches and/or Coastal Dunes below d. Coastal Beaches 1. square feet 2. cubic yards beach nourishment e. Coastal Dunes 1. square feet 2. cubic yards dune nourishment Size of Proposed Alteration Proposed Replacement (if any) f. Coastal Banks 1. linear feet g. Rocky Intertidal Shores 1. square feet h. Salt Marshes 1. square feet 2. sq ft restoration, rehab., creation i. Land Under Salt Ponds 1. square feet 2. cubic yards dredged j. Land Containing Shellfish 1. square feet k. Fish Runs Indicate size under Coastal Banks, inland Bank, Land Under the Ocean, and/or inland Land Under Waterbodies and Waterways, above 1. cubic yards dredged l. Land Subject to Coastal Storm Flowage 1. square feet 4. Restoration/Enhancement If the project is for the purpose of restoring or enhancing a wetland resource area in addition to the square footage that has been entered in Section B.2.b or B.3.h above, please enter the additional amount here. a. square feet of BVW b. square feet of Salt Marsh 5. Project Involves Stream Crossings a. number of new stream crossings b. number of replacement stream crossings Northampton wpaform3.doc • rev. 6/18/2020 Page 5 of 9 4 Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands WPA Form 3 – Notice of Intent Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 Provided by MassDEP: MassDEP File Number Document Transaction Number City/Town C. Other Applicable Standards and Requirements This is a proposal for an Ecological Restoration Limited Project. Skip Section C and complete Appendix A: Ecological Restoration Limited Project Checklists – Required Actions (310 CMR 10.11). Streamlined Massachusetts Endangered Species Act/Wetlands Protection Act Review 1. Is any portion of the proposed project located in Estimated Habitat of Rare Wildlife as indicated on the most recent Estimated Habitat Map of State-Listed Rare Wetland Wildlife published by the Natural Heritage and Endangered Species Program (NHESP)? To view habitat maps, see the Massachusetts Natural Heritage Atlas or go to http://maps.massgis.state.ma.us/PRI_EST_HAB/viewer.htm. a. Yes No If yes, include proof of mailing or hand delivery of NOI to: Natural Heritage and Endangered Species Program Division of Fisheries and Wildlife 1 Rabbit Hill Road Westborough, MA 01581 Phone: (508) 389-6360 b. Date of map If yes, the project is also subject to Massachusetts Endangered Species Act (MESA) review (321 CMR 10.18). To qualify for a streamlined, 30-day, MESA/Wetlands Protection Act review, please complete Section C.1.c, and include requested materials with this Notice of Intent (NOI); OR complete Section C.2.f, if applicable. If MESA supplemental information is not included with the NOI, by completing Section 1 of this form, the NHESP will require a separate MESA filing which may take up to 90 days to review (unless noted exceptions in Section 2 apply, see below). c. Submit Supplemental Information for Endangered Species Review 1. Percentage/acreage of property to be altered: (a) within wetland Resource Area percentage/acreage (b) outside Resource Area percentage/acreage 2. Assessor’s Map or right-of-way plan of site 2. Project plans for entire project site, including wetland resource areas and areas outside of wetlands jurisdiction, showing existing and proposed conditions, existing and proposed tree/vegetation clearing line, and clearly demarcated limits of work  (a) Project description (including description of impacts outside of wetland resource area & buffer zone) (b) Photographs representative of the site  Some projects not in Estimated Habitat may be located in Priority Habitat, and require NHESP review (see https://www.mass.gov/ma- endangered-species-act-mesa-regulatory-review). Priority Habitat includes habitat for state-listed plants and strictly upland species not protected by the Wetlands Protection Act.  MESA projects may not be segmented (321 CMR 10.16). The applicant must disclose full development plans even if such plans are not required as part of the Notice of Intent process. Northampton x August 2021 wpaform3.doc • rev. 6/18/2020 Page 6 of 9 4 Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands WPA Form 3 – Notice of Intent Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 Provided by MassDEP: MassDEP File Number Document Transaction Number City/Town C. Other Applicable Standards and Requirements (cont’d) (c) MESA filing fee (fee information available at https://www.mass.gov/how-to/how-to-file-for- a-mesa-project-review). Make check payable to “Commonwealth of Massachusetts - NHESP” and mail to NHESP at above address Projects altering 10 or more acres of land, also submit: (d) Vegetation cover type map of site (e) Project plans showing Priority & Estimated Habitat boundaries (f) OR Check One of the Following 1. Project is exempt from MESA review. Attach applicant letter indicating which MESA exemption applies. (See 321 CMR 10.14, https://www.mass.gov/service-details/exemptions-from-review-for-projectsactivities-in- priority-habitat; the NOI must still be sent to NHESP if the project is within estimated habitat pursuant to 310 CMR 10.37 and 10.59.) 2. Separate MESA review ongoing. a. NHESP Tracking # b. Date submitted to NHESP 3. Separate MESA review completed. Include copy of NHESP “no Take” determination or valid Conservation & Management Permit with approved plan. 3. For coastal projects only, is any portion of the proposed project located below the mean high water line or in a fish run? a. Not applicable – project is in inland resource area only b. Yes No If yes, include proof of mailing, hand delivery, or electronic delivery of NOI to either: South Shore - Cohasset to Rhode Island border, and the Cape & Islands: Division of Marine Fisheries - Southeast Marine Fisheries Station Attn: Environmental Reviewer 836 South Rodney French Blvd. New Bedford, MA 02744 Email: dmf.envreview-south@mass.gov North Shore - Hull to New Hampshire border: Division of Marine Fisheries - North Shore Office Attn: Environmental Reviewer 30 Emerson Avenue Gloucester, MA 01930 Email: dmf.envreview-north@mass.gov Also if yes, the project may require a Chapter 91 license. For coastal towns in the Northeast Region, please contact MassDEP’s Boston Office. For coastal towns in the Southeast Region, please contact MassDEP’s Southeast Regional Office. c. Is this an aquaculture project? d. Yes No If yes, include a copy of the Division of Marine Fisheries Certification Letter (M.G.L. c. 130, § 57). Northampton x wpaform3.doc • rev. 6/18/2020 Page 7 of 9 4 Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands WPA Form 3 – Notice of Intent Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 Provided by MassDEP: MassDEP File Number Document Transaction Number City/Town C. Other Applicable Standards and Requirements (cont’d) Online Users: Include your document transaction number (provided on your receipt page) with all supplementary information you submit to the Department. 4. Is any portion of the proposed project within an Area of Critical Environmental Concern (ACEC)? a. Yes No If yes, provide name of ACEC (see instructions to WPA Form 3 or MassDEP Website for ACEC locations). Note: electronic filers click on Website. b. ACEC 5. Is any portion of the proposed project within an area designated as an Outstanding Resource Water (ORW) as designated in the Massachusetts Surface Water Quality Standards, 314 CMR 4.00? a. Yes No 6. Is any portion of the site subject to a Wetlands Restriction Order under the Inland Wetlands Restriction Act (M.G.L. c. 131, § 40A) or the Coastal Wetlands Restriction Act (M.G.L. c. 130, § 105)? a. Yes No 7. Is this project subject to provisions of the MassDEP Stormwater Management Standards? a. Yes. Attach a copy of the Stormwater Report as required by the Stormwater Management Standards per 310 CMR 10.05(6)(k)-(q) and check if: 1. Applying for Low Impact Development (LID) site design credits (as described in Stormwater Management Handbook Vol. 2, Chapter 3) 2. A portion of the site constitutes redevelopment 3. Proprietary BMPs are included in the Stormwater Management System. b. No. Check why the project is exempt: 1. Single-family house 2. Emergency road repair 3. Small Residential Subdivision (less than or equal to 4 single-family houses or less than or equal to 4 units in multi-family housing project) with no discharge to Critical Areas. D. Additional Information This is a proposal for an Ecological Restoration Limited Project. Skip Section D and complete Appendix A: Ecological Restoration Notice of Intent – Minimum Required Documents (310 CMR 10.12). Applicants must include the following with this Notice of Intent (NOI). See instructions for details. Online Users: Attach the document transaction number (provided on your receipt page) for any of the following information you submit to the Department. 1. USGS or other map of the area (along with a narrative description, if necessary) containing sufficient information for the Conservation Commission and the Department to locate the site. (Electronic filers may omit this item.) 2. Plans identifying the location of proposed activities (including activities proposed to serve as a Bordering Vegetated Wetland [BVW] replication area or other mitigating measure) relative to the boundaries of each affected resource area. Northampton x x x x x x wpaform3.doc • rev. 6/18/2020 Page 8 of 9 4 Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands WPA Form 3 – Notice of Intent Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 Provided by MassDEP: MassDEP File Number Document Transaction Number City/Town D. Additional Information (cont’d) 3. Identify the method for BVW and other resource area boundary delineations (MassDEP BVW Field Data Form(s), Determination of Applicability, Order of Resource Area Delineation, etc.), and attach documentation of the methodology. 4. List the titles and dates for all plans and other materials submitted with this NOI. a. Plan Title b. Prepared By c. Signed and Stamped by d. Final Revision Date e. Scale f. Additional Plan or Document Title g. Date 5. If there is more than one property owner, please attach a list of these property owners not listed on this form. 6. Attach proof of mailing for Natural Heritage and Endangered Species Program, if needed. 7. Attach proof of mailing for Massachusetts Division of Marine Fisheries, if needed. 8. Attach NOI Wetland Fee Transmittal Form 9. Attach Stormwater Report, if needed. E. Fees 1. Fee Exempt: No filing fee shall be assessed for projects of any city, town, county, or district of the Commonwealth, federally recognized Indian tribe housing authority, municipal housing authority, or the Massachusetts Bay Transportation Authority. Applicants must submit the following information (in addition to pages 1 and 2 of the NOI Wetland Fee Transmittal Form) to confirm fee payment: 2. Municipal Check Number 3. Check date 4. State Check Number 5. Check date 6. Payor name on check: First Name 7. Payor name on check: Last Name Northampton N/A N/A x x x Drainage Outfall Restoration - Mass Central Rail Trail near Adare Place Kris Baker, P.E.Kris Baker, P.E. November 2023 1":20' x N/A wpaform3.doc • rev. 6/18/2020 Page 9 of 9 4 Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands WPA Form 3 – Notice of Intent Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 Provided by MassDEP: MassDEP File Number Document Transaction Number City/Town F. Signatures and Submittal Requirements I hereby certify under the penalties of perjury that the foregoing Notice of Intent and accompanying plans, documents, and supporting data are true and complete to the best of my knowledge. I understand that the Conservation Commission will place notification of this Notice in a local newspaper at the expense of the applicant in accordance with the wetlands regulations, 310 CMR 10.05(5)(a). I further certify under penalties of perjury that all abutters were notified of this application, pursuant to the requirements of M.G.L. c. 131, § 40. Notice must be made by Certificate of Mailing or in writing by hand delivery or certified mail (return receipt requested) to all abutters within 100 feet of the property line of the project location. 1. Signature of Applicant 2. Date 3. Signature of Property Owner (if different) 4. Date 5. Signature of Representative (if any) 6. Date For Conservation Commission: Two copies of the completed Notice of Intent (Form 3), including supporting plans and documents, two copies of the NOI Wetland Fee Transmittal Form, and the city/town fee payment, to the Conservation Commission by certified mail or hand delivery. For MassDEP: One copy of the completed Notice of Intent (Form 3), including supporting plans and documents, one copy of the NOI Wetland Fee Transmittal Form, and a copy of the state fee payment to the MassDEP Regional Office (see Instructions) by certified mail or hand delivery. Other: If the applicant has checked the “yes” box in any part of Section C, Item 3, above, refer to that section and the Instructions for additional submittal requirements. The original and copies must be sent simultaneously. Failure by the applicant to send copies in a timely manner may result in dismissal of the Notice of Intent. Northampton noifeetf.doc • Wetland Fee Transmittal Form • rev. 10/11 Page 1 of 2 Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands NOI Wetland Fee Transmittal Form Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 Important: When filling out forms on the computer, use only the tab key to move your cursor - do not use the return key. A. Applicant Information 1. Location of Project: a. Street Address b. City/Town c. Check number d. Fee amount 2. Applicant Mailing Address: a. First Name b. Last Name c. Organization d. Mailing Address e. City/Town f. State g. Zip Code h. Phone Number i. Fax Number j. Email Address 3. Property Owner (if different): a. First Name b. Last Name c. Organization d. Mailing Address e. City/Town f. State g. Zip Code h. Phone Number i. Fax Number j. Email Address To calculate filing fees, refer to the category fee list and examples in the instructions for filling out WPA Form 3 (Notice of Intent). B. Fees Fee should be calculated using the following process & worksheet. Please see Instructions before filling out worksheet. Step 1/Type of Activity: Describe each type of activity that will occur in wetland resource area and buffer zone. Step 2/Number of Activities: Identify the number of each type of activity. Step 3/Individual Activity Fee: Identify each activity fee from the six project categories listed in the instructions. Step 4/Subtotal Activity Fee: Multiply the number of activities (identified in Step 2) times the fee per category (identified in Step 3) to reach a subtotal fee amount. Note: If any of these activities are in a Riverfront Area in addition to another Resource Area or the Buffer Zone, the fee per activity should be multiplied by 1.5 and then added to the subtotal amount. Step 5/Total Project Fee: Determine the total project fee by adding the subtotal amounts from Step 4. Step 6/Fee Payments: To calculate the state share of the fee, divide the total fee in half and subtract $12.50. To calculate the city/town share of the fee, divide the total fee in half and add $12.50. Mass Central Rail Trail Northampton N/A $0 City of Northampton Department of Public Works 125 Locust St Northampton MA 01060 413-584-1570 kbaker@northamptonma.gov noifeetf.doc • Wetland Fee Transmittal Form • rev. 10/11 Page 2 of 2 Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands NOI Wetland Fee Transmittal Form Massachusetts Wetlands Protection Act M.G.L. c. 131, §40 B. Fees (continued) Step 1/Type of Activity Step 2/Number of Activities Step 3/Individual Activity Fee Step 4/Subtotal Activity Fee Step 5/Total Project Fee: Step 6/Fee Payments: Total Project Fee: a. Total Fee from Step 5 State share of filing Fee: b. 1/2 Total Fee less $12.50 City/Town share of filling Fee: c. 1/2 Total Fee plus $12.50 C. Submittal Requirements a.) Complete pages 1 and 2 and send with a check or money order for the state share of the fee, payable to the Commonwealth of Massachusetts. Department of Environmental Protection Box 4062 Boston, MA 02211 b.) To the Conservation Commission: Send the Notice of Intent or Abbreviated Notice of Intent; a copy of this form; and the city/town fee payment. To MassDEP Regional Office (see Instructions): Send a copy of the Notice of Intent or Abbreviated Notice of Intent; a copy of this form; and a copy of the state fee payment. (E-filers of Notices of Intent may submit these electronically.) $0 (exempt) $0 $0 $0 NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_rev 20231201.docx | Page 4 1 INTRODUCTION The City of Northampton Department of Public Works (DPW) is responsible for maintaining a drainage system that runs along the Mass Central Rail Trail and discharges flow at a 36” outfall towards the Barrett Street Marsh Conservation Area near Adare Place. This system carries a significant amount of flow from a developed area to the west and the high volume of water in the system has caused the outfall pipes to start to fail. If left as is, the system will continue to fail and the bike path itself could be undermined. The proposed project seeks to avoid this scenario by reconfiguring the system to include a series of stepped manholes near the outfall that slows the flow within the pipes, and by reconstructing a failed riprap energy dissipation basin just downstream of the outlet pipe. Most of the proposed work will take place within the easement for the bike path; a small portion of the basin is proposed to be constructed on the adjacent conservation land. Work is proposed within Land Under Waterbodies and Waterways, Inland Bank and Bordering Vegetated Wetland associated with the outfall channel. As a result, the scope of work falls under Category VI of the DPW’s General Order of Conditions for Routine Maintenance and Repair Activities and requires the filing of a Notice of Intent. 2 GENERAL SITE DESCRIPTION 2.1 SITE CONDITIONS Two stormwater conveyance systems outfall at the same location on the north side of the Mass Central Rail Trail, just north of Adare Place. One drainage system caries flow from 76 acres of residential development to the west between Prospect Street and the bike path. The 30- to 36-inch trunk line for this system runs approximately 1,500 lf southeast along the bike path to a manhole and outfalls on the north side of the bike path embankment. The outfall discharge creates a channel that flows northeast then easterly to eventually join Barrett Brook. In 1978, this outfall was constructed to include corrugated metal pipe with a flared end that emptied to a riprap basin, followed by a two foot mortared stone ‘energy dissipater’ wall located eleven feet downstream of the pipe. According to the 1978 plan, a mortared stone channel was constructed downstream of the wall on the adjacent property (now conservation land). At present, the flared end section of pipe has become detached from the rest of the pipe, the outfall riprap basin is not intact, the stone wall has been overwhelmed leaving remnants of riprap in the stream, and the stone channel is not recognizable. Additionally, the downstream channel is significantly incised (4-5 feet deep) with evidence of ongoing severe erosion and undercut banks. The area immediately upslope the outlet pipe is also significantly eroded and a sinkhole is forming between the pipe outlet and the bike path, which suggests the impending detachment of another section of pipe. A second outfall at this location consists of a 24- by 36-inch stone box culvert that carries flow under the bike path from Adare Place, Murphy Terrace, Jackson Street and an open ditch along the bike path. This combined flow outlets to the same channel as the 36-inch pipe described above. While this structure is functional, the outlet appears to be collapsing, effectively reducing the amount of water that it can pass. The ongoing deterioration of both of these systems has the potential to compromise the northern embankment of the bike path, and eventually, the bike path itself. The City of Northampton holds a permanent easement from Massachusetts Electric Company for the bike path itself, which includes the “right…to construct, reconstruct, install, repair and maintain drainage facilities” along the bike path (Hampshire Registry of Deeds Bk 2274/Pg 282). Drainage from the outfall passes through Barret Brook Conservation Area – a marsh and forested wetland complex situated between the bike path and the King Street commercial corridor - which is owned by the City and under the care and control of the Office of Planning and Sustainability. At the project location, the bike path is elevated almost NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_rev 20231201.docx | Page 5 twenty feet above the wetland area to which the pipe outlets; the embankment on the north side of the bike path is steep with a greater than 70% slope. The project site is wooded with trees and shrubs on the embankment and throughout the wetland area. According to the USDA Web Soil Survey, soils on the embankment are mapped as Belgrade silt loam, 3-8% slopes, and soils in the wetland at the toe of the slope are mapped as Enosberg fine sandy loam, 3-8% slopes. Field observations were somewhat consistent with the Web Soil Survey, including a high groundwater table and sandy loam soil in the wetland area; a six-inch organic layer is also present on site within the area mapped as Enosberg soils. WETLAND RESOURCE AREAS Jurisdictional wetland resource areas around the outfall were identified and delineated by GZA staff in 2019 as part of the Designs with Nature project. DPW Environmental Planner Johanna Stacy conducted fieldwork in October 2023 to confirm the wetland boundaries and complete updated USACE wetland determination data sheets, which can be found in Appendix B. The following resource areas are present at the project site: o Land Under Waterbodies and Waterways (LUWW) o Inland Bank (IB) o Bordering Vegetated Wetland (BVW) o Intermittent Stream buffer (local) o Land Under Wetlands and Waterways (LUWW) is present within the outfall channel. As the outfall channel consists of an intermittent stream, LUWW is delineated as a single line within the channel. Much of this area in the vicinity of the outfall pipe already contains riprap and remnants of the stone basin that was constructed in 1978. Downstream of the outfall, LUWW is comprised of silty and sandy substrate. Inland Bank (IB) is present along the outfall channel and is characterized by the presence of some riprap near the outlet pipe. Further downstream, IB is native soil and shows evidence of significant erosion, with undercut banks and a general lack of vegetation. Bordering Vegetated Wetland (BVW) is present westerly adjacent to the stream channel and also on the east side of the stream beginning at a point about 150 feet downstream of the outlet. BVW consists of a red maple swamp where dominant species include: red maple (Acer rubrum), silver maple (Acer sacharinum), red elm (Ulmus rubra), black locust (Robinia psuedoacacia), honeysuckle (Lonicera sp.), privet (Ligustrum obtusum), Japanese barberry (Berberis thunbergii), skunk cabbage (Symplocarpus foetidus), and evergreen wood fern (Dryopteris intermedia). A soil pit in the wetland area on the west side of the channel indicated a saturated 6-inch layer of mucky organic soil (10YR 3/1), underlain by a two-inch mucky sand layer (5YR 4/2). This layer extends below 12 inches with many distinct redox concentrations visible (2.5YR 4/6). Intermittent stream buffer associated with the outfall channel is present within the project area and includes areas of BVW and upland area on the bike bath embankment. 3 PROPOSED PROJECT To address this failing system and reduce the amount of downstream erosion caused by intermittent high flow velocity, DPW proposes to reconstruct the 36-inch outfall by reconfiguring the last 100+ feet of this system. The proposed plan involves removing one existing manhole and approximately 90 lf of 36-inch drainpipe on the north side of the bike path and installing a series of four stepped manholes on the embankment that are connected by 36-inch reinforced concrete pipe (RCP). The new configuration will drain to a replaced outfall pipe and constructed riprap basin at the same location of the existing pipe. The proposed basin will be lined with large riprap (with 50% of stones weighing >200 lb) and measure about 15 feet wide by 30 feet in length and 2.5 feet deep. The basin and accompanying apron will extend approximately 50 lf NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_rev 20231201.docx | Page 6 from the outfall with a portion of the basin constructed within the easement parcel and about 30 feet of the structure built on the conservation property; the footprint of the proposed work is similar to that drawn in the 1978 plan, but extends further onto the conservation parcel to allow for a suitably-sized basin and apron to handle the existing flow volumes and velocity. The design calculations are based on U.S. Department of Transportation - Federal Highway Administration Publication No. FHWA-NHI-06-086, “Hydraulic Design of Energy Dissipaters for Culverts and Channels, July 2006. The stepped manholes are intended to slow the flow of water before it leaves the system and the riprap basin will provide additional energy dissipation before the water reaches the downstream channel and adjacent wetland. According to modeling conducted by DPW engineering staff, this combination of features should reduce the velocity of water from 15 fps at the existing 36” outfall to 8 fps during a 2-year storm, thereby maintaining the integrity of the system, reducing erosion within the wetland area, and ensuring the stability of the bike path. In addition to the work described above, DPW proposes to improve flows at the box culvert outlet located immediately adjacent to the 36-inch pipe. Proposed work at this outlet involves assessing the outlet structure, and if feasible, adjusting the placement of stone at the end of the outlet to restore its previous flow volume. 3.1 WETLAND IMPACTS Both outfalls drain to a channel, which flows through a forested wetland area and eventually joins Barrett Brook. The proposed stormwater outfall project is located approximately 1,000 feet west of Barrett Brook, mostly within the bike path easement and partly on the conservation parcel. Installation of the stepped manholes is proposed in the upland area on the embankment of the bike path. Reconstruction of the outfall pipe and riprap basin is proposed within Land Under Waterways and Inland Bank associated with the outfall channel. Construction site access is proposed with resource area 100-foot buffers and within the BVW on the north side of the channel. While the pipe reconstruction and riprap basin work within LUWW and IB constitute permanent alteration of these resource areas, the impacts to BVW are temporary and the area will be restored post-construction. Due to the nature of the project and the existing conditions at the site, it is infeasible to locate this project to another area. Moving the outfall would also alter the hydrologic regime that has been in place for over 40 years, which would likely affect the wetland habitat surrounding the project site. For these reasons, the project is proposed to remain at its current location. While the Performance Standards of the Northampton Wetland Ordinance do not allow alteration of resource areas or their buffer zones, Section 337-10(E)(2)(h) allows for alteration when the project contains an area “already degraded or developed” and the proposed work results “in an improvement over existing conditions” and the “area of proposed work shall not exceed the amount of degraded area.” The proposed outfall restoration is located in a degraded and developed area and should result in an improvement of conditions both at the outlet itself and in the downstream wetland complex. The proposed work extends slightly beyond the existing developed area to allow for the installation of a structure that provides sufficient energy dissipation to attenuate flow from larger and more intense storm events. Resource area impacts and how the proposed project meets performance standards for each resource area is described below: a) Land Under Wetlands and Waterways (LUWW) – work is proposed in 1 lf of LUWW to reconstruct the riprap basin and armor the bottom and sides of the channel near the outfall to prevent scour and ongoing erosion. Existing riprap will be used to the extent possible and additional riprap will be placed near the outfall where the previous riprap has washed away. LUWW also exists within the stone box culvert that will be restored. Performance standards for LUWW are met as follows: i. The water carrying capacity within the defined channel will not be impaired – The carrying capacity of the channel will be altered slightly in the immediate vicinity of the outlet to repair the scour pool NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_rev 20231201.docx | Page 7 created by the existing detached pipe section and to replace the detached length of pipe that will direct water away from the embankment. The riprap basin has been designed to carry sufficient flow from the outfall such that the carrying capacity of the channel will not be impaired. The carrying capacity in the channel downstream of the project will not be affected by the proposed design. As a limited project, the proposed design is not required to fully meet this standard. ii. Ground and surface water quality will not be impaired – The project seeks to improve surface water quality by slowing the flow of water leaving the drain pipe. Slower flow should reduce erosion and sedimentation during storm events and provide more opportunity for groundwater infiltration; iii. The capacity of said land to provide breeding habitat, escape cover and food for fisheries should not be impaired – Given the high flow fluctuations at the project site and high flow velocity during storm events, it is not an ideal site for breeding habitat or escape cover and thus does not further impair the habitat conditions at this location. The proposed project should result in improvements to these habitat functions downstream of the project site; iv. The capacity of said land to provide wildlife habitat functions should not be impaired – The area in the vicinity of the outfall is not well-suited to providing habitat functions; the proposed project should improve flow velocity downstream of the outfall and create more stable habitat conditions for wildlife. b) Inland Bank (IB) –Bank associated with the outfall channel is proposed to be riprapped for a length of 127 lf. Unstable, natural bank would be replaced with stone riprap to improve stability in this high-energy area and to reduce erosion that results from storm flows. The minimum amount of bank necessary to stabilize the channel is proposed to be altered. Work is also proposed within the 100- foot buffer to Inland Bank to construct the stepped manholes and re-grade a portion of the embankment to repair existing erosion. Equipment access on the east side of the stream channel will also occur in IB buffer. Twenty feet of Inland Bank also exists within the stone box culvert that will be restored; the placement of stone will change but no other permanent alteration of IB within the culvert will change. Performance standards for Inland Bank are met as follows: i. The physical stability of the bank will not be impaired – This project proposes to regrade and install riprap on steep, highly-eroded banks to stabilize the soil and prevent future erosion; the proposed work is expected to result in an improvement from existing conditions; ii. The water carrying capacity of the existing channel will not be impaired – The project proposes to restore the end section of the outfall pipe at the toe of the embankment and to restore the edge of bank that existed when the pipe was installed. This will require that the existing bank above the outlet be moved away from the side of the bike path embankment. While this will result in a small reduction in carrying capacity from the existing conditions, it is necessary to prevent the slope from eroding towards the bike path. The carrying capacity of the channel downstream of the new pipe outlet will not be reduced more than is necessary to grade the channel immediately adjacent to the outlet and the channel and basin have been designed to better handle the flow from the outfall; iii. Groundwater and surface water quality will not be impaired – the project seeks to improve water quality within the downstream channel and at the outlet itself by slowing the flow and reducing bank erosion; iv. The capacity of the Bank to provide breeding habitat, escape cover and food for fisheries will not be impaired – the area in the immediate vicinity of the outlet does not currently provide good conditions for these functions; however, the project is designed to improve these functions in downstream areas of the channel by slowing the flow and providing more stable habitat conditions for aquatic species. c) Bordering Vegetated Wetland (BVW) – BVW is present westerly adjacent to the stream channel and also on the east side of the stream beginning at a point about 150 feet downstream of the outlet. NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_rev 20231201.docx | Page 8 Work proposed in BVW includes 604 sf of temporary impacts related to equipment access for the construction of the riprap basin. Work is also proposed within the 100-foot buffer to BVW on the embankment to install the stepped manholes and connecting pipe. Installation of the manholes and connecting pipe will require removal of approximately eighteen live trees and one dead tree. Trees to be removed are listed below. Table 1. Trees >4” dbh Proposed for Removal within BVW Buffer Common name Scientific name dbh (inches) Red elm Ulmus rubra 12 Black locust (dead) Robinia pseudoacacia 17 Silver maple Acer saccharinum 11 Silver maple Acer saccharinum 13 Norway maple Acer platanoides 8 Norway maple Acer platanoides 8 Silver maple Acer saccharinum 10 Black locust Robinia pseudoacacia 7 Norway maple Acer platanoides 5 Black locust Robinia pseudoacacia 24 Silver maple Acer saccharinum 6 Black locust Robinia pseudoacacia 10 Red maple Acer rubrum 8 Red maple Acer rubrum 11 Silver maple Acer saccharinum 6 Black locust Robinia pseudoacacia 10 Black locust Robinia pseudoacacia 18 Black locust Robinia pseudoacacia 6 The performance standard for BVW requires that the proposed work does “not destroy or otherwise impair” any portion of the wetland. This project only proposes temporary impacts to BVW, and mitigation is provided through minimizing the project footprint and the use of construction mats when operating equipment in the BVW. Native wetland shrubs and groundcover will be planted adjacent to the channel to restore areas disturbed during construction. Tree removal within the buffer area will be mitigated by planting native tree and shrub species to stabilize the embankment. DPW proposes to plant the following species on the re-graded portion of the embankment: Red maple (Acer rubrum), Silver maple (Acer saccharinum), Black chokeberry (Aronia melanocarpa), Gray dogwood (Swida racemosa), Shadbush (Amelanchier sp.) and Witch-hazel (Hamemelis virginiana). d) Intermittent Stream Buffer (100’) - Northampton Wetland Ordinance includes a 100-foot buffer to intermittent streams, which is present on the site adjacent to the stream channel and overlaps with the IB and BVW buffer areas. Work proposed in this area that meets the performance standards for other resource areas is presumed to meet the intermittent stream buffer performance standards. Table 2. Summary of Wetland Impacts – Outfall and Stilling Basin Resource Alteration Replication BVW 565 sf (temp) 565 sf (In-Situ Replication) LUWW 1 lf 1lf (In-Situ Replication) Inland Bank 127 lf 127 lf NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_rev 20231201.docx | Page 9 (In-situ replication) Intermittent stream buffer (local) 1,200 N/A Work related to restoring the box culvert outlet involves using equipment to adjust the existing stone on the sides and top of the structure. Restoration work is only proposed within the last ten feet of the culvert structure. LUWW exists within the structure and will likely be disturbed during construction. Inland Bank exists along the sides of the structure. The proposed work is not expected to alter the existing conditions of either resource area and the proposed impacts will be temporary. Table 3. Summary of Wetland Impacts – Stone Box Culvert Resource Alteration Replication LUWW 1 lf (temp) 1 lf (In-Situ Replication) Inland Bank 20 lf (temp) 20 lf (In-situ Replication) To control erosion during construction, DPW proposes to install straw wattles downslope of the work area to prevent sedimentation to the surrounding wetland area. A temporary stone check dam is proposed within the downstream channel; the dam will be removed when the new outfall pipe is connected and receiving flow. Flow into the existing CMP will be temporarily directed toward a bypass pump with sediment trap until the new pipe is installed and functional. 4 ALTERNATIVES ANALYSIS The following sections provide details on the results of hydrology, hydraulics and design analyses conducted by City of Northampton DPW engineering staff. 4.1 HYDROLOGIC & HYDRAULIC EVALUATION Hydrology and hydraulics models of the drain system were developed to analyze the existing conditions and suitable alternatives for the reconstructed outfall. The existing conditions at the site were determined from drainage system mapping and invert information from ‘Topographical Plan of Land’ by Heritage Survey, Inc. January 31, 2019. City GIS, Planimetrics and LIDAR data were used to delineate catchment areas, determine impervious surfaces, and ground elevations. A SWMM model was developed to evaluate the pre-and post- project conditions. The system evaluations were conducted for the 2-, 10- and the 100-year storm events. The precipitation for these design storms was based on the National Oceanic and Atmospheric Administration (NOAA) Atlas 14, Volume 10 (version 3) precipitation depths (Table 1) and Northeast Regional Climate Center (NRCC) Type C, 24-hour precipitation distribution curve. Design Storm Rainfall depth (in) 2-year, 24-hour 3.08 10-year, 24 hour 4.92 100-year, 24 hour 7.83 Figure 2 shows the modeled subcatchment areas and outfalls that are used as the design points. Design point 1 (DP-1) is the outfall of the existing 36” RCP. Design point 2 (DP-2) is the outfall of the 2-foot by 3-foot stone culvert under the rail trail. Design point 3 (DP-3) is the combined flow in the drainage channel. NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_rev 20231201.docx | Page 10 Figure 1. Subcatchment areas and design points The existing condition peak discharge rates at the outfalls (design points) are shown in Table 3. The two and 10-year flow is used for the analysis. Table 4. Existing Subcatchment Areas Peak Runoff Rates Peak Runoff Rate (cfs) Subcatchment 2-year storm 10-year storm 100-year storm Subcatchment to DP-1 (36” CMP) (76.1 acres) 17.6 28.1 131.3 Subcatchment to DP-2 (2’x3’ Stone Culvert) (18.5 acres) 9.0 18.2 32.6 Table 5. Existing Drainage System Peak Discharge Rates and Velocities 2-year storm 10-year storm Design Point Peak discharge (cfs) Peak velocity (fps) Peak discharge (cfs) Peak velocity (fps) DP-1 (36” CMP) 17.6 14.6 28.1 16.2 DP-2 (2’x3’ stone culvert) 9.0 5.8 18.2 7.3 DP-3 (drainage channel) 26.6 -- 46.3 -- NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_rev 20231201.docx | Page 11 Note: The SWMM model includes the drainage system upgradient of the project site for 1,200 feet to include the existing system to Blackberry Lane. The capacity of the upgradient drainage system is 69.8 cfs. The additional runoff from the subcatchment will therefore not be conveyed into the system. This situation only occurs during the 100-year storm event for which 61.5 cfs is modeled as being lost to overland flow above the rims of the upgradient manholes. Flow velocities were calculated within the pipes, but are not available for the downstream drainage channel (DP-3). Alternative #1 With the goal of slowing the velocity of water leaving the 36” pipe, the proposed design replaces approximately 100 lf of pipe with a series of four manholes which are connected by 36” RCP pipe. The first three manholes are spaced about 40 feet apart with outlet inverts of each successive manhole approximately 2.5 feet below the one upstream. The last manhole is located about 20 feet upstream of the outfall with an outlet less than one foot above the outlet invert. This design functions to slow the flow of water as it descends the slope to the outfall. Flow volumes and velocities were modeled in SWMM at the fourth manhole (DP-4) to approximate flow leaving the outlet. Table 6. Design Flows for 36-inch Outfall and Stone Box Culvert 2-year storm 10-year storm Flow volume (cfs) Flow velocity (fps) Flow volume (cfs) Flow velocity (fps) DP-4 17.6 8 28.1 8.7 DP-2 9.0 5.4 18.2 6.5 In comparison to the existing condition where velocity of flow leaving the 36-inch pipe is 14.6 fps and 16.2 fps at the two and 10-year storms, the proposed design reduces flow velocity to 8fps and 8.7 fps, respectively. After these flows pass through the stilling basin, water velocity should be reduced even further to limit the amount of erosion taking place in the downstream channel. The riprap basin/dissipation pool at the outlet was designed to withstand the velocity of flow leaving the pipe and to provide sufficient storage capacity to further reduce the flow velocity of water leaving the basin. Large riprap is proposed to line the basin and the basin size was identified through calculations completed by DPW Engineering staff. Calculations for basin sizing and design can be found in Appendix C. The proposed outfall design is able to significantly reduce flow velocity of water leaving the outfall pipe and also maintains a relatively small footprint within the already disturbed resource area. It also accomplishes the goal of a more functional drain outfall that can withstand the volume and velocity of flow it receives in order to provide better downstream conditions for wildlife and natural hydrologic processes to take place. For these reasons, this design is the preferred option. Alternative #2 DPW considered an alternative design that extended the 36” drainpipe approximately 900 feet east along the bike path to outlet at a larger settling basin before flowing to the marsh. The proposed settling basin was located in close proximity to an isolated wetland and the riprap energy dissipater would have required a larger construction footprint on conservation property. This design would require obtaining permission from Mass Electric to install the drainline along the bike path, and additional tree removals would have been required. As the cost of this design was significantly higher than Alternative #1, and the scope of work is beyond the existing legal rights of the bike path easement, this alternative was considered infeasible and DPW did not pursue this option. NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_rev 20231201.docx | Page 12 4.2 PREFERRED ALTERNATIVE SELECTION The proposed outfall reconstruction near Adare Place seeks to address a failing stormwater outfall located in close proximity to the Mass Central Rail Trail. The proposed design of integrating four stepped manholes near the end of the system will alter flow within the drain pipes to reduce the flow velocity at the outfall. A previously-constructed riprap basin will be reconstructed to modern standards and be able to handle the volume and intensity of present-day storms. Most of this work is proposed within resource area buffers and within the bikeway easement. A small portion of the proposed work would take place on the Barrett Marsh conservation land. As a limited project, it is not required to fully meet the performance standards for each resource area. The project’s location within wetland resource areas require work that will alter these resources; however, the project footprint has been minimized to the extent feasible, no reasonable alternatives exist, and the long-term benefits to downstream resource areas and the preservation of a key local transportation route (Mass Central Rail Trail) likely outweigh the construction impacts to this already degraded area. Proposed mitigation to re-vegetate disturbed areas aims to reduce the overall impacts to Land Under Water, Inland Bank and Bordering Vegetation Wetland and restore the habitat functions of these areas. 5 OTHER PERMITS This project is not located within Priority or Estimated Habitat for Endangered Species and will not require a MESA Checklist Review. USACE jurisdictional wetlands are affected by this project and a Self-Verification Form will be filed consistent with the current Massachusetts General Permits. No other permits are required for the project as proposed. NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_final.docx | Page 12 4.2 PREFERRED ALTERNATIVE SELECTION The proposed outfall reconstruction near Adare Place seeks to address a failing stormwater outfall located in close proximity to the Mass Central Rail Trail. The proposed design of integrating four stepped manholes near the end of the system will alter flow within the drain pipes to reduce the flow velocity at the outfall. A previously-constructed riprap basin will be reconstructed to modern standards and be able to handle the volume and intensity of present-day storms. Most of this work is proposed within resource area buffers and within the bikeway easement. A small portion of the proposed work would take place on the Barrett Marsh conservation land. The project’s location within wetland resource areas require work that will alter these resources; however, the project footprint has been minimized to the extent feasible, and the long-term benefits to downstream resource areas and the preservation of a key local transportation route (Mass Central Rail Trail) likely outweigh the construction impacts to this already degraded area. Proposed mitigation to re-vegetate disturbed areas seeks to reduce the overall impacts to Land Under Water, Inland Bank and Bordering Vegetation Wetland and restore the habitat functions of these areas. 5 OTHER PERMITS This project is not located within Priority or Estimated Habitat for Endangered Species and will not require a MESA Checklist Review. USACE jurisdictional wetlands are affected by this project and a Self-Verification Form will be filed consistent with the current Massachusetts General Permits. No other permits are required for the project as proposed. NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_final.docx APPENDIX A USGS MAP & PROJECT PLANS Bridge Rd I-91 Jackson StState StBarrett St Franklin StProspect AveKi ng St - Routes 5 & 10Elm S t Massasoit StNorthEl mStHatfield StFinn St Crescent StC o okeAve Childs Park W oodlawnAveRoundHillRdGleason Rd Roe AveD a m o n R d Milton StElmSt-Route9NorthElmSt-Route9Carlo n D r Bancr o ftRdVernonStHillsideR d Ridgewood Ter Summer St HamptonGdns BlackberryLnHospitalRdNorfolk AveStoddard StAdare PlTerrace Ln Allison St Aldrich StDeni seCtPilgrim D r P e rk in s A v e Hampshire H t s Forbes AveAr lin gton St River Run Murphy TerNorth King St - R o u t e s 5&10Myrtle StPineBrookCur v e Church St Warbu rt onWay Francis StIndustrial Dr BarrettPlW in ter StH a yes A veCalvin Ter Bright St Fifth Ave Alley Taylor St Dickinson St Warfi el dPl H o o k e r A ve Prospect Hgts Denniston Pl Glendale AveP r o s p e c t C tMassasoit Ave Prospect St ChildsParkI-91 I - 9 1 I-91 Ch ild sParkAlleyUSGS The National Map: National Boundaries Dataset, 3DEP Elevation Program, Geographic Names Information System, National Hydrography Dataset, National Land Cover Database, National Structures Dataset, and National Transportation Dataset; USGS Global Ecosystems; U.S. Census Bureau TIGER/Line data; USFS Road Data; Natural Earth Data; U.S. Department of State Humanitarian Information Unit; and NOAA National Centers for Environmental Information, U.S. Coastal Relief Model. Datarefreshed October 2018. I City of Northampton Public Works 1:8,796 Absolute Scale 8-VC-1-3-33 8-VC-1-3-34 8-PVC-1990020236-RC-19781101 8-Tile-3-3-01, 1990020230-RC-19820420 36-ACCM-19781101 Adare Pl26 39 35 29 265 253 23 43 49 283 40 37 32 24 31 18 1725 5-0 4-0 3-0 6-CI-2-015I City of Northampton Public Works 1:1,000 Absolute Scale NORTHAMPTON, MASSACHUSETTS INDEX OF SHEETSTHE HONORABLE GINA-LOUISE SCIARRA MAYOR NO. G-1 C-1 C-2 C-3 DESCRIPTION COVER SHEET NOTES & LEGEND DEMOLITION & ENVIRONMENTAL PROPOSED CONDITIONS PLANTING PLAN PROFILE AND DETAILS NOVEMBER 17, 2023 CONTRACTS 2023 DRAINAGE OUTFALL RESTORATION MASS CENTRAL RAIL TRAIL NEAR ADARE PLACE DEPARTMENT OF PUBLIC WORKS DONNA LASCALEIA, DIRECTOR KRIS BAKER, P.E., CITY ENGINEER DEPARTMENT OF PUBLIC WORKS 125 LOCUST STREET NORTHAMPTON, MA 01060 413-587-1570 FAX 413-587-1576 PERMITTING SET D-1 CB CATCH BASIN CONC CONCRETE DET DETERMINED DGCS DENSE-GRADED CRUSHED STONE DI DUCTILE IRON DIR DIRECTED DMH DRAIN MANHOLE ENGR ENGINEER EOP EDGE OF PAVEMENT EX EXISTING F&C FRAME AND COVER F&G FRAME AND GRATE FIN FINISHED GV GAS VALVE HMA HOT MIX ASPHALT INV INVERT MH MANHOLE PAVE PAVEMENT PROP PROPOSED PROT PROTECT R&D REMOVE AND DISCARD R&R REMOVE AND RESET R&S REMOVE AND STACK RCP REINFORCED CONCRETE PIPE RET RETAIN SMH SEWER MANHOLE TYP TYPICAL UNK UNKNOWN WV WATER VALVE GENERAL ABBREVIATIONS BLSF BORDERING LAND SUBJECT TO FLOODING ILSF ISOLATED LAND SUBJECT TO FLOODING BVW BORDERING VEGETATION WETLAND LUWW LAND UNDER WATER AND WATERWAYS RFA RIVERFRONT AREA VP CERTIFIED VERNAL POOLS WETLAND RESOURCE AREA ABBREVIATIONS GENERAL NOTES: 1. CONTRACTOR SHALL SUBMIT A COMPLETE NOTICE OF INTENT TO THE EPA FOR COVERAGE UNDER THE CONSTRUCTION GENERAL PERMIT AT LEAST 7 DAYS PRIOR TO STARTING THE WORK. IN ADDITION, A COPY OF THE STORMWATER POLLUTION PREVENTION PLAN (SWPPP) SHALL BE PROVIDED TO THE NORTHAMPTON DPW FOR REVIEW PRIOR TO THE PRE-CONSTRUCTION MEETING AND THE NOTICE TO PROCEED. ADDITIONAL REQUIREMENTS FOR STORMWATER POLLUTION PREVENTION ARE PROVIDED IN THE PROJECT SPECIFICATIONS (INCLUDING A WETLANDS ORDER OF CONDITIONS, IF ANY) AND WITHIN THESE PLANS; SEE "EROSION AND SEDIMENTATION CONTROL" ON THIS SHEET. 2. GEODETIC COORDINATES: MASSACHUSETTS MAINLAND ZONE, US SURVEY FEET, NAD83-NAVD88. GPS CONTROL POINTS WILL BE PROVIDED BY DPW PRIOR TO CONSTRUCTION. THE CONTRACTOR SHALL BE RESPONSIBLE FOR MAINTAINING ALL CONTROL POINTS AND BENCH MARKS NECESSARY FOR THE WORK. 3. THE CONTRACTOR SHALL ENGAGE THE SERVICES OF A LICENSED SURVEYOR OR ENGINEER FOR THE PROJECT LAYOUT. THE CONTRACTOR IS RESPONSIBLE FOR MAINTAINING EXISTING MONUMENTATION, INCLUDING PROPERTY BOUNDARY PINS, AND REPLACING THEM IN KIND AND ACCURACY IF DISTURBED. 4. UNLESS OTHERWISE NOTED, PROPERTY LINES AND OWNERSHIP INFORMATION ARE FROM THE CITY OF NORTHAMPTON ASSESSOR'S OFFICE AND ARE APPROXIMATE. 5. TOPOGRAPHIC CONTOURS DERIVED FROM MASSGIS LIDAR TERRAIN DATA PROJECT, 2015. PLANIMETRICS BASEMAPPING DATA FROM THE SANBORN MAP COMPANY, INC, UTILIZING STEREOIMAGERY ACQUIRED UNDER THE MASSORTHO CONSORTIUM AND USGS QL1 LIDAR, 2015. 6. THE CONTRACTOR IS REQUIRED TO CONTACT DIGSAFE (888-344-7233) AT LEAST 72 HOURS PRIOR TO ANY EXCAVATION WORK, AND OBTAIN A TRENCH PERMIT FROM THE NORTHAMPTON DPW. 7. UTILITY EMERGENCY: CALL 911 8. UNDERGROUND UTILITY LOCATIONS WERE COMPILED FROM DPW FIELD SURVEY, RECORD DRAWINGS AND AVAILABLE UTILITY COMPANY RECORD PLANS. ALL EXISTING CONDITIONS SHALL BE FIELD VERIFIED BY THE CONTRACTOR PRIOR TO CONSTRUCTION. IF FIELD CONDITIONS ARE OBSERVED THAT VARY SIGNIFICANTLY FROM THOSE SHOWN ON THE PLANS, THE CONTRACTOR SHALL IMMEDIATELY NOTIFY THE ENGINEER IN WRITING FOR RESOLUTION OF THE CONFLICTING INFORMATION. 9. THE CONTRACTOR IS RESPONSIBLE FOR SITE SECURITY AND SAFETY. ALL CONSTRUCTION AND EXCAVATION SHALL COMPLY WITH CURRENT OSHA STANDARDS, INCLUDING, BUT NOT LIMITED TO, THE PROVISION FOR A COMPETENT PERSON ON SITE, TRENCH SAFETY PLANS AND ANY OTHER REQUIRED DOCUMENTATION. 10. THE CONTRACTOR SHALL MATCH ALL NEW PAVEMENT AND OTHER SURFACE GRADES TO EXISTING GRADES, PROVIDING A SMOOTH, FLUSH TRANSITION. EROSION AND SEDIMENT CONTROLS: 1.CONSTRUCTION STORMWATER POLLUTION PREVENTION PLAN (SWPPP). SEE GENERAL NOTE 1, ABOVE. IN ADDITION, THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL STORMWATER POLLUTION PREVENTION IRRESPECTIVE OF ANY APPROVALS RECEIVED FROM THE EPA, THE CITY, OR OTHER SOURCE. THE SWPPP SHALL COMPLY WITH ALL REGULATORY REQUIREMENTS AND SHALL ALSO INCLUDE THE FOLLOWING: 2.SITE PERIMETER SEDIMENT CONTROLS SHALL INCLUDE SEDIMENT CAPTURE DEVICES INSTALLED DOWN-GRADIENT OF THE SITE WORK. SEDIMENT CAPTURE DEVICES SHALL INCLUDE, AS APPLICABLE, THE FOLLOWING: 2.1.FILTER SOCKS - SEE DETAILS, FOR USE AS PERIMETER CONTROL, TEMPORARY CHECK DAM IN SWALE, OR AS DIRECTED BY ENGINEER. 2.2.STRAW WATTLES - SEE DETAILS, FOR USE AS PERIMETER CONTROL, WITHIN ROADSIDE DRAINAGE CHANNEL, OR AS DIRECTED BY ENGINEER. 2.3.SILT FENCE WITH STRAW BALES - SEE DETAILS, FOR USE AS PERIMETER SEDIMENT CAPTURE IN UNPAVED AREAS, DOWN-GRADIENT OF SOIL STOCK PILES, AND AS DIRECTED BY ENGINEER. AS A MINIMUM, THE TYPE OF SITE PERIMETER CONTROL USED SHALL BE AS INDICATED ON PLAN SHEETS OR AS DIRECTED BY ENGINEER. DIRECTION GIVEN BY CITY REPRESENTATIVE SHALL NOT RELIEVE THE CONTRACTOR FROM RESPONSIBILITY TO IMPLEMENT ADDITIONAL SEDIMENT CONTROL MEASURES IF NEEDED TO CONTROL SEDIMENT MOVEMENT. 3.VEHICULAR SOIL TRACKING SHALL BE MINIMIZED AS NECESSARY THROUGH THE USE OF CRUSHED STONE AT THE ENTRANCES TO DRIVEWAYS OR ROADWAYS, DAILY SWEEPING ON HIGHER TRAFFIC AREAS, AND DAILY EVALUATION OF THE SITE TO DETERMINE ADDITIONAL SOIL MIGRATION PREVENTION AND DUST CONTROL MEASURES. 4.SOIL STOCKPILES THAT ARE NOT USED THE SAME DAY SHALL HAVE SEDIMENT CONTROLS/BARRIERS (SILT FENCE AND STRAW BALES) INSTALLED DOWN-GRADIENT OF THE STOCKPILE. STOCK PILES THAT REMAIN INACTIVE FOR MORE THAN 7 DAYS SHALL BE COVERED WITH IMPERVIOUS TARPAULIN. 5.CONTROL OF SEDIMENT MOVEMENT INTO CATCH BASINS AND AREA DRAINS. FILTER FABRICS DESIGNED FOR INSERTION BELOW STANDARD ROADWAY CATCH BASIN INLETS ARE PREFERRED SEDIMENT CONTROL FOR CATCH BASIN INLETS DRAINING LESS THAN 3000-SF IMPERVIOUS (ROADWAY) AT SLOPES LESS THAN 5%; SEE DETAIL SHEETS FOR "FILTER SOCK CURB INLET" OR "INLET PROTECTION". STRAW BALE SEDIMENT BARRIERS OR SILT FENCE SEDIMENT BARRIERS MAY BE REQUIRED FOR LARGER DRAINAGE AREAS OR HIGHER SLOPES, TO BE DIRECTED BY ENGINEER. 6.SLOPE PROTECTION: EROSION CONTROL MATTING SHALL BE USED TO STABILIZE DISTURBED AND REGRADED SLOPES STEEPER THAN 4H:1V OR AS DIRECTED BY ENGINEER. INSTALLATION SHALL BE IN ACCORDANCE WITH MANUFACTURER'S RECOMMENDATIONS. 7.INSPECTION AND MAINTENANCE: INSPECT THE EROSION AND SEDIMENT CONTROL MEASURES AFTER EACH RAIN EVENT AND PROMPTLY MAKE ANY NECESSARY REPAIRS. SEDIMENT SHALL BE REMOVED AFTER EACH SIGNIFICANT STORM (1-INCH IN 24 HOURS) TO PROVIDE ADEQUATE STORAGE VOLUME FOR THE NEXT RAIN EVENT. CONTRACTOR SHALL INSTALL AND MAINTAIN RAIN GAUGE. THE REMOVED SEDIMENT SHALL BE DEPOSITED IN AN AREA THAT CAN BE PERMANENTLY STABILIZED AND WILL NOT CONTRIBUTE SEDIMENT OFF SITE. IF THE GRAVEL FILTER BECOMES CLOGGED WITH SEDIMENT, THE CLOGGED FILTER STONE AND SEDIMENTS MUST BE CAREFULLY REMOVED TO PREVENT MOVEMENT OF SEDIMENT INTO DRAINAGE STRUCTURES OR TOWARDS OTHER PROTECTED AREAS AND A NEW WASHED STONE FILTER SHALL BE INSTALLED TO CONTROL MOVEMENT OF SEDIMENTS. SIGN AND PAVEMENT MARKINGS: 1. ALL EXISTING TRAFFIC CONTROL SIGNS WITHIN THE LIMITS OF WORK SHALL BE MAINTAINED, PROTECTED, AND/OR REMOVED AND RESET UNLESS OTHERWISE NOTED ON THE PLANS OR AS DIRECTED BY THE ENGINEER. ALL SIGN PANELS REMOVED FOR REPLACEMENT SHALL BE DISPOSED OF OFF-SITE OR DELIVERED TO THE DPW YARD AS DIRECTED BY THE ENGINEER. 2. EXACT LAYOUT AND PLACEMENT OF ALL SIGNS AND THERMOPLASTIC PAINT TO MEET INTENT OF THE CURRENT EDITION OF THE "MANUAL ON UNIFORM TRAFFIC CONTROL DEVICES" (MUTCD) GUIDELINES, & BE APPROVED BY ENGINEER. HIGH INTENSITY RETROREFLECTIVE SHEETING SHALL BE USED FOR ALL SIGNS. TREE PROTECTION: 1. TREES IN THE VICINITY OF WORK SHALL BE PROTECTED DURING CONSTRUCTION. PRIOR TO STARTING WORK, CONTRACTOR SHALL CONSULT WITH DPW ARBORIST TO DETERMINE TYPE OF PROTECTION REQUIRED FOR EACH TREE. SEE TREE PROTECTION DETAILS. 2. AIR SPADING MAY BE REQUIRED IF ROOTS ARE ENCOUNTERED DURING CONSTRUCTION EXCAVATION, PER DIRECTION OF THE TREE WARDEN AND/ OR ENGINEER. UTILITY NOTES: 1. EXISTING UTILITIES ARE SHOWN BASED ON AVAILABLE INFORMATION AND ARE APPROXIMATE ONLY. THE CONTRACTOR, IN ALL OPERATIONS, SHALL ANTICIPATE THE EXISTENCE OF UTILITIES THAT ARE CONSISTENT WITH LOCAL USAGE REQUIREMENTS. THE CONTRACTOR SHALL VERIFY THE LOCATION OF ALL EXISTING UTILITIES AND NOTIFY THE APPROPRIATE UTILITY COMPANY OR AUTHORITY. 2. THE CONTRACTOR SHALL DIG TEST PITS, WHERE REQUIRED, TO VERIFY THE LOCATION OF UNDERGROUND UTILITIES AND WHEREVER PROPOSED UNDERGROUND UTILITIES MAY CROSS OR BE ADJACENT TO EXISTING UTILITIES. 3. IT SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR TO RELOCATE, OR COORDINATE THE RELOCATION OF, ALL EXISTING UTILITIES WHICH CONFLICT WITH THE PROPOSED IMPROVEMENTS SHOWN ON THE PLAN. CONTRACTOR SHALL NOTIFY APPROPRIATE UTILITY AT LEAST 3 WEEKS PRIOR TO ANY REQUIRED UTILITY RELOCATIONS. 4. IT SHALL BE THE CONTRACTOR'S RESPONSIBILITY TO MAINTAIN THE PROPER FUNCTIONING OF ALL UTILITIES IN THE AREAS UNDER CONSTRUCTION PRIOR TO THE TIME WHEN THE FINAL SYSTEM IS PLACED INTO SERVICE. ALL PIPES AND STRUCTURES, AND POLES WITHIN THE LIMITS OF WORK SHALL BE LEFT IN A CLEAN AND OPERABLE CONDITION AT THE COMPLETION OF WORK. THE CONTRACTOR IS RESPONSIBLE FOR DAMAGE TO ANY EXISTING UTILITIES AND FOR REPAIRS THAT COMPLY WITH THE REQUIREMENTS OF THE CITY OR RESPECTIVE UTILITY COMPANY. 5. UTILITY TRENCHES IN ROADWAY SHALL BE PATCHED WITHIN 48 HOURS OR AS DIRECTED BY THE ENGINEER. 6. THE CONTRACTOR SHALL NOTIFY ALL RESIDENTS AND BUSINESSES OWNERS OF ANY WORK WHICH MAY AFFECT ACCESS TO THEIR PROPERTY (SUCH AS DRIVEWAYS). SAID NOTICE SHALL BE GIVEN, IN WRITING, 24 HOURS PRIOR TO THE COMMENCEMENT OF SUCH WORK. 7. ALL WATER SHUTDOWNS SHALL BE PERFORMED BY THE CITY OF NORTHAMPTON WATER DIVISION. 8. ANY WATER HYDRANT THAT IS OUT OF SERVICE SHALL BE BAGGED. THE FIRE DEPARTMENT SHALL BE NOTIFIED AT LEAST 24 HOURS IN ADVANCE OF ANY HYDRANT THAT IS TO BE TAKEN OUT OF SERVICE. PROPERTY PROTECTION: 1. LAND MONUMENTS AND PROPERTY MARKS SHALL BE CAREFULLY PROTECTED AND, IF FOUND NECESSARY TO REMOVE, THE CONTRACTOR SHALL ENGAGE A PROFESSIONAL LAND SURVEYOR TO REMOVE AND LATER RESET PROPERTY MONUMENTS AND MARKS. THE CONTRACTOR WILL BE RESPONSIBLE FOR THE REPLACEMENT BY A LICENSED PROFESSIONAL LAND SURVEYOR OF ANY PROPERTY PINS OR MONUMENTS DISTURBED DURING CONSTRUCTION. 2. THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL DAMAGE CAUSED BY THEIR ACTIONS ON PRIVATE PROPERTY. 3. TOPOGRAPHY AND PLANIMETRICS PROVIDED BY NORTHAMPTON DPW. PROPERTY LINES PROVIDED BY ASSESSOR'S OFFICE. 4. EXISTING MAILBOXES SHALL BE PROTECTED OR REMOVED AND RESET TO PERFORM WORK. SEQUENCE OF WORK: 1. CONTRACTOR SHALL SUBMIT A DETAILED PLAN SHOWING THE OVERALL SEQUENCE OF WORK FOR EACH WORK ITEM, INCLUDING BUT NOT LIMITED TO PROPOSED WEEKLY SCHEDULE, SEQUENCING OF INSTALLATION OF VARIOUS COMPONENTS OF THE WORK, PROPOSED ROAD CLOSURES, AND ALTERNATE ROUTES. THIS SCHEDULE SHALL BE SUBMITTED PRIOR TO ISSUANCE OF A NOTE TO PROCEED. 2. THE SEQUENCE OF WORK SHALL ALSO DESCRIBE METHODS TO MAINTAIN PEDESTRIAN TRAFFIC FOR ALL PHASES AND TO ALL AFFECTED PROPERTIES. 3. THE CONTRACTOR SHALL SUBMIT A DETAILED TRAFFIC MANAGEMENT PLAN FOR REVIEW AND APPROVAL BY THE NORTHAMPTON DPW PRIOR TO CONDUCTING ANY SITE WORK. 4. CONTRACTOR SHALL IMPLEMENT SITE SAFETY CONTROLS AND TRAFFIC AND PEDESTRIAN MANAGEMENT PLAN PRIOR TO CONDUCTING ANY SITE WORK. DEMOLITION: 1. IN AREAS WHERE BITUMINOUS CONCRETE IS TO BE REMOVED, THE EDGE OF ANY BITUMINOUS CONCRETE TO REMAIN SHALL BE NEATLY SAWCUT PRIOR TO THE BITUMINOUS CONCRETE REMOVAL. IF THE NEATLY SAWCUT EDGE IS DAMAGED PRIOR TO FINAL PAVEMENT, IT SHALL BE NEATLY SAWCUT AGAIN AS DIRECTED BY THE ENGINEER. 2. MATERIALS TO BE REMOVED MAY INCLUDE, BUT ARE NOT LIMITED TO: BITUMINOUS PAVEMENT, CURBING, WALKS AND DRIVES; CONCRETE CURBING, WALKS AND DRIVES; CAST IRON, ASBESTOS CEMENT AND OTHER PIPING; UTILITY STRUCTURES; RUBBLE, ROCK AND UNSUITABLE MATERIAL. THE CONTRACTOR SHALL DISPOSE OF THESE MATERIALS IN ACCORDANCE WITH ALL APPLICABLE CITY OF NORTHAMPTON, STATE, AND FEDERAL REGULATIONS. 3. UNLESS OTHERWISE INDICATED, ABANDONED EXISTING UTILITY LINES SHALL BE CAPPED WITH MASONRY & CONCRETE PLUGS AT THE LIMITS OF WORK. ABANDONED LINES WITHIN THE LIMITS OF WORK SHALL BE REMOVED AND DISPOSED OF IN ACCORDANCE WITH ALL LOCAL, STATE AND FEDERAL REGULATIONS. 4. EXISTING BURIED STRUCTURES THAT ARE NOT FUNCTIONAL MAY BE ABANDONED IN PLACE, AT THE DISCRETION OF THE ENGINEER, AS FOLLOWS: REMOVE THE TOP RISER SECTION; PERFORATE THE BOTTOM TO ALLOW IT TO DRAIN; ALL PIPE PENETRATIONS SHALL BE PLUGGED WITH MASONRY AND MORTAR; AND THE VOID SHALL BE BACKFILLED AND COMPACTED WITH ORDINARY BORROW OR CONTROL DENSITY FILL. PROPOSED LEGEND STORM DRAIN EDGE OF PAVEMENT STORM DRAIN MANHOLE TREE PROTECTION CONTOUR EROSION CONTROL SPOT GRADE LIMIT OF WORK DRAWN: DATE: DESIGN: CHECKED: NORTHAMPTON DEPARTMENT OF PUBLIC WORKS ENGINEERING DIVISION NORTHAMPTON, MA. 01060 125 LOCUST STREET FAX (413) 587-1576 (413) 587-1570 SCALE: 1" = DRAWING NO. SHEET TITLE REVISIONS DATE DESCRIPTIONPROJECTNO. VERT. SCALE: CITY OF N/A N/A . G-1 11/17/2023 GJN KB KB NOTES & LEGENDDRAINAGE OUTFALLRESTORATIONMASS CENTRAL RAIL TRAILNEAR ADARE PLACE 2 3 4 DRAWN: DATE: DESIGN: CHECKED: NORTHAMPTON DEPARTMENT OF PUBLIC WORKS ENGINEERING DIVISION NORTHAMPTON, MA. 01060 125 LOCUST STREET FAX (413) 587-1576 (413) 587-1570 SCALE: 1" = DRAWING NO. SHEET TITLE REVISIONS DATE DESCRIPTIONPROJECTNO. VERT. SCALE: CITY OF N/A 10' 20'10'0' C-1 12/01/2023 GJN CZC/KB CZC/KB DEMOLITION & ENVIRONMENTALDRAINAGE OUTFALLRESTORATIONMASS CENTRAL RAIL TRAILNEAR ADARE PLACE 2 3 4 DRAWN: DATE: DESIGN: CHECKED: NORTHAMPTON DEPARTMENT OF PUBLIC WORKS ENGINEERING DIVISION NORTHAMPTON, MA. 01060 125 LOCUST STREET FAX (413) 587-1576 (413) 587-1570 SCALE: 1" = DRAWING NO. SHEET TITLE REVISIONS DATE DESCRIPTIONPROJECTNO. VERT. SCALE: CITY OF N/A 10' 20'10'0' C-2 11/17/2023 GJN CZC/KB CZC/KB PROPOSED CONDITIONSDRAINAGE OUTFALLRESTORATIONMASS CENTRAL RAIL TRAILNEAR ADARE PLACE 2 3 4 DRAWN: DATE: DESIGN: CHECKED: NORTHAMPTON DEPARTMENT OF PUBLIC WORKS ENGINEERING DIVISION NORTHAMPTON, MA. 01060 125 LOCUST STREET FAX (413) 587-1576 (413) 587-1570 SCALE: 1" = DRAWING NO. SHEET TITLE REVISIONS DATE DESCRIPTIONPROJECTNO. VERT. SCALE: CITY OF N/A 10' 20'10' 0' C-3 11/17/2023 GJN CZC/KB CZC/KB PLANTING PLANDRAINAGE OUTFALLRESTORATIONMASS CENTRAL RAIL TRAILNEAR ADARE PLACE 150 155 160 165 170 175 180 185 150 160 170 180 1+601+802+002+202+402+602+803+003+203+403+603+804+00DRAWN: DATE: DESIGN: CHECKED: NORTHAMPTON DEPARTMENT OF PUBLIC WORKS ENGINEERING DIVISION NORTHAMPTON, MA. 01060 125 LOCUST STREET FAX (413) 587-1576 (413) 587-1570 SCALE: 1" = DRAWING NO. SHEET TITLE REVISIONS DATE DESCRIPTIONPROJECTNO. VERT. SCALE: CITY OF 1" = 2' 10' 20'10'0' D-1 11/17/2023 GJN CZC/KB CZC/KB PROFILE & DETAILSDRAINAGE OUTFALLRESTORATIONMASS CENTRAL RAIL TRAILNEAR ADARE PLACE NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_final.docx APPENDIX B BVW DELINEATION FORMS US Army Corps of Engineers Northcentral and Northeast Region – Version 2.0 WETLAND DETERMINATION DATA FORM – Northcentral and Northeast Region Project/Site: City/County: Sampling Date: Applicant/Owner: State: Sampling Point: Investigator(s): Section, Township, Range: Landform (hillslope, terrace, etc.): Local relief (concave, convex, none): Slope (%): Subregion (LRR or MLRA): Lat: Long: Datum: Soil Map Unit Name: NWI classification: Are climatic / hydrologic conditions on the site typical for this time of year? Yes No (If no, explain in Remarks.) Are Vegetation , Soil , or Hydrology significantly disturbed? Are “Normal Circumstances” present? Yes No Are Vegetation , Soil , or Hydrology naturally problematic? (If needed, explain any answers in Remarks.) SUMMARY OF FINDINGS – Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes No Hydric Soil Present? Yes No Wetland Hydrology Present? Yes No Is the Sampled Area within a Wetland? Yes No If yes, optional Wetland Site ID: Remarks: (Explain alternative procedures here or in a separate report.) HYDROLOGY Wetland Hydrology Indicators: Secondary Indicators (minimum of two required) Primary Indicators (minimum of one is required; check all that apply) Surface Soil Cracks (B6) Surface Water (A1) Water-Stained Leaves (B9) Drainage Patterns (B10) High Water Table (A2) Aquatic Fauna (B13) Moss Trim Lines (B16) Saturation (A3) Marl Deposits (B15) Dry-Season Water Table (C2) Water Marks (B1) Hydrogen Sulfide Odor (C1) Crayfish Burrows (C8) Sediment Deposits (B2) Oxidized Rhizospheres on Living Roots (C3) Saturation Visible on Aerial Imagery (C9) Drift Deposits (B3) Presence of Reduced Iron (C4) Stunted or Stressed Plants (D1) Algal Mat or Crust (B4) Recent Iron Reduction in Tilled Soils (C6) Geomorphic Position (D2) Iron Deposits (B5) Thin Muck Surface (C7) Shallow Aquitard (D3) Inundation Visible on Aerial Imagery (B7) Other (Explain in Remarks) Microtopographic Relief (D4) Sparsely Vegetated Concave Surface (B8) FAC-Neutral Test (D5) Field Observations: Surface Water Present? Yes No Depth (inches): Water Table Present? Yes No Depth (inches): Saturation Present? Yes No Depth (inches): (includes capillary fringe) Wetland Hydrology Present? Yes No Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Remarks: Adare Place outfall 10/24/2023 City of Northampton - Dept of Public Works Northampton MA 1 Johanna Stacy basin concave <3% LRR R 42.33120 -72.64271 NAD 88 PSS1E x x x x x x Precipitation has been unusually high - rainfall since July is about 10" above average xx x x 1-2 x x 3 x Enosberg fine sandy loam, 3-8% slope Water table at 7" below surface 7 US Army Corps of Engineers Northcentral and Northeast Region – Version 2.0 VEGETATION – Use scientific names of plants. Sampling Point: Absolute Dominant Indicator Tree Stratum (Plot size: ) % Cover Species? Status 1. 2. 3. 4. 5. 6. 7. = Total Cover Sapling/Shrub Stratum (Plot size: ) 1. 2. 3. 4. 5. 6. 7. = Total Cover Herb Stratum (Plot size: ) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. = Total Cover Woody Vine Stratum (Plot size: ) 1. 2. 3. 4. = Total Cover Dominance Test worksheet: Number of Dominant Species That Are OBL, FACW, or FAC: (A) Total Number of Dominant Species Across All Strata: (B) Percent of Dominant Species That Are OBL, FACW, or FAC: (A/B) Prevalence Index worksheet: Total % Cover of: Multiply by: OBL species x 1 = FACW species x 2 = FAC species x 3 = FACU species x 4 = UPL species x 5 = Column Totals: (A) (B) Prevalence Index = B/A = Hydrophytic Vegetation Indicators: 1 - Rapid Test for Hydrophytic Vegetation 2 - Dominance Test is >50% 3 - Prevalence Index is ≤3.01 4 - Morphological Adaptations1 (Provide supporting data in Remarks or on a separate sheet) Problematic Hydrophytic Vegetation1 (Explain) 1Indicators of hydric soil and wetland hydrology must be present, unless disturbed or problematic. Definitions of Vegetation Strata: Tree – Woody plants 3 in. (7.6 cm) or more in diameter at breast height (DBH), regardless of height. Sapling/shrub – Woody plants less than 3 in. DBH and greater than or equal to 3.28 ft (1 m) tall. Herb – All herbaceous (non-woody) plants, regardless of size, and woody plants less than 3.28 ft tall. Woody vines – All woody vines greater than 3.28 ft in height. Hydrophytic Vegetation Present? Yes No Remarks: (Include photo numbers here or on a separate sheet.) 1 30' Acer rubrum 30 Y FAC Ulmus rubra 30 Y FAC 15' Y FACU Y FACU N 60 5 Symplocarpus foetidus 25 Y OBL Berberis thungerbii 10 FACU Lonicera sp.10 FACU 30 x x Ligustrum obtusum Lonicera sp. Aronia arbutifolia 15 10 10 5 5 5 Y 50 Rosa multiflora Prunus virginiana Ulmus americana FACW N N 5 5Aegopodium podagraria Y 55 Y N N 8 4 50 Unkown US Army Corps of Engineers Northcentral and Northeast Region – Version 2.0 SOIL Sampling Point: Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color (moist) % Color (moist) % Type1 Loc2 Texture Remarks 1Type: C=Concentration, D=Depletion, RM=Reduced Matrix, MS=Masked Sand Grains. 2Location: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: Indicators for Problematic Hydric Soils3: Histosol (A1) Polyvalue Below Surface (S8) (LRR R, 2 cm Muck (A10) (LRR K, L, MLRA 149B) Histic Epipedon (A2) MLRA 149B) Coast Prairie Redox (A16) (LRR K, L, R) Black Histic (A3) Thin Dark Surface (S9) (LRR R, MLRA 149B) 5 cm Mucky Peat or Peat (S3) (LRR K, L, R) Hydrogen Sulfide (A4) Loamy Mucky Mineral (F1) (LRR K, L) Dark Surface (S7) (LRR K, L) Stratified Layers (A5) Loamy Gleyed Matrix (F2) Polyvalue Below Surface (S8) (LRR K, L) Depleted Below Dark Surface (A11) Depleted Matrix (F3) Thin Dark Surface (S9) (LRR K, L) Thick Dark Surface (A12) Redox Dark Surface (F6) Iron-Manganese Masses (F12) (LRR K, L, R) Sandy Mucky Mineral (S1) Depleted Dark Surface (F7) Piedmont Floodplain Soils (F19) (MLRA 149B) Sandy Gleyed Matrix (S4) Redox Depressions (F8) Mesic Spodic (TA6) (MLRA 144A, 145, 149B) Sandy Redox (S5) Red Parent Material (F21) Stripped Matrix (S6) Very Shallow Dark Surface (TF12) Dark Surface (S7) (LRR R, MLRA 149B) Other (Explain in Remarks) 3Indicators of hydrophytic vegetation and wetland hydrology must be present, unless disturbed or problematic. Restrictive Layer (if observed): Type: Depth (inches): Hydric Soil Present? Yes No Remarks: 1 100 mucky mucky sand saturated x x 0-4 10YR 3/1 4-12+5Y 4/2 95 2.5 YR 4/6 5 C PL saturated NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_final.docx APPENDIX C BASIN DESIGN CALCULATIONS Sphere 170 lb/cf W (lbs)V (cf) r (ft)D (ft) sphere D (ft) FHWA D (ft) USACE D (ft) NRCS 25 0.15 0.04 0.07 0.56 0.65 0.72 50 0.29 0.07 0.14 0.70 0.83 0.91 75 0.44 0.11 0.21 0.80 0.94 1.04 125 0.74 0.18 0.35 0.95 1.12 1.23 200 1.18 0.28 0.56 1.11 1.31 1.44 300 1.76 0.42 0.84 1.28 1.50 1.65 400 2.35 0.56 1.12 1.40 1.65 1.81 500 2.94 0.70 1.40 1.51 1.78 1.95 W (lbs)V (cf) r (ft)D (in) sphere D (in) FHWA D (in) USACE D (in) NRCS 25 0.15 0.04 1 7 8 9 50 0.29 0.07 2 8 10 11 75 0.44 0.11 3 10 11 12 125 0.74 0.18 4 11 13 15 200 1.18 0.28 7 13 16 17 300 1.76 0.42 10 15 18 20 400 2.35 0.56 13 17 20 22 500 2.94 0.70 17 18 21 23 36" RCP 2'x3' Culv W50 400 75 D50 1.65 0.94 T (2*D50)3 2 Rock Type M2.02.0 Rip Rap M2.02.3 Stone for Pipe Ends Notes: FHWA HEC-23 and TxDOT standard specification book of 2014 assume the volume of a riprap stone is 85% of a cube with the same characteristic size D: W=0.85*Density*D^3. USACE EM 1110-2-1601: W=(Pi()*Density*D^3)/6, or W=0.524*Density*D^3. NRCS: National Engineering Book Part 654 Technical Supplement 14C – Stone Sizing Criteria; D: W=(Pi()*Density*D^3)/8, or W=0.393*Density*D^3. 0 5 10 15 20 25 0 100 200 300 400 500 600d50 (ft)Weight (lbs) D (ft) FHWA D (ft) USACE D (ft) NRCS MH Center STA ELEV in ELEV out Dia RIM DIST Pipe Length (ft) MHA 221 171.2 169.2 6 178.1 MHB 241 168.5 166.5 6 175.5 A-B 14 MHC 261 165.9 163.9 6 172.8 B-C 14 MHD 301 162.3 160.3 6 169.2 C-D 34 OUT 320 159.5 D-OUT 16 SET El. Outfall 159.5 Pipe Slope Calcs Drop within each MH 2 L of pipe 78 Total Drop 9.7 V Loss in MHs 6 Pipe Rise 3.7 Pipe Run 78 SLOPE In PIPES 4.7% 158 160 162 164 166 168 170 172 200 220 240 260 280 300 320 340Elevation Station ELEV in ELEV out HEC 14 Manual Rip Rap Basin 36" 100-YR Step 1. Compute the culvert outlet velocity, Vo, and depth, yo. Vo 13.1 ft/s From Proposed SWMM 3' culvert, 100-year storm Q 69.8 cfs yo 2.12 ft D 3.0 ft A 7.07 sf ye=yo ye = equivalent brink (outlet) depth, ft; ye=yo for box culverts ye 1.88 ft (A/2)^(1/2) for non-rectangular sections Fr 1.68 Fr = Vo /(g * yo)^0.5 g 32.2 ft/s2 Step 2. Select D50 appropriate for locally available riprap. S 2.8 Riprap Specific Gravity (175 lb/ft3 / 62.4 lb/ft3) D50 1.0 ft Using Equation 10.6 D50 design 1.3 ft Dumped Rip Rap M2.02.2 TW/ye < 0.75 Co 2.00 --Eqn 10.3 intermediate risk w low tailwater hs/ye -0.25 -- hs -0.47 ft hs = dissipator pool depth, ft hs Design 2.50 ft hs needs to be at least 2 * D50 Check hs/D50 ≥ 2 1.88 TOO LOW hs is the depth of the pool below the TW D50/ye ≥ 0.1 0.19 OK Step 3. Determine the length of the dissipation pool (scour hole) Ls, total basin length, LB, and basin width at the basin exit, WB Recommended Minimum Design from Section 10.1 Wo -- --3.0 ft LS 25.0 9 29.0 ft LA 12.5 3.0 12.0 ft LB 37.5 12 41.0 ft WB 30.3 --16.0 ft Side Slopes 2 H:1 Step 4. Determine the basin exit depth, yB = yc, and exit velocity, VB = Vc and compare with the allowable exit velocity, Vallow. yB = yC 0.81 ft Critical Depth / Iterative enter to match below the two calculations of Q^2/g VB = VC 4.9 ft/s Vallow 5 ft/s Best 2 ft/s for open channel; will allow 5 ft/s with bioengineered banks Check YES Is Vc <= Vallow? 4 ft/s for grass channel max erosive force Critical Depth Iterative Calc Ac 14.3 Q^2/g 151 Q2/g = (Ac)^3/Tc = [yc(WB + zyc)]/ (WB + 2zyc) Q^2/g (iter)151 close enough match to cell above by iterating yB = yC Ac^3 2,907 Tc 19 Side Slope 2 -- Step 5. Assess need for additional riprap downstream of the dissipator exit. If TW/yo ≤ 0.75, no additional riprap is needed. TW Condition ok bc slope of d/s channel NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_final.docx APPENDIX D PHOTOGRAPHS NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_final.docx PHOTO 1. EXISTING OUTFALL WITH DETACHED SECTION AND RIPRAP IN STREAMBED (OCTOBER 2023) PHOTO 2. 36-INCH OUTFALL (RIGHT) AND STONE BOX CULVERT (LEFT) (FEBRUARY 2023) 36” outfall 2’ x 3’ stone box culvert NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_final.docx PHOTO 3. VIEW OF PROJECT AREA AND ERODED BANKS (OCTOBER 2023) PHOTO 4. VIEW TO DOWNSTREAM AREA (OCTOBER 2023) NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_final.docx PHOTO 5. CHANNEL DOWNSTREAM OF PROJECT AREA (OCTOBER 2023) PHOTO 6. VIEW OF OUTFALL WITH REMNANT OF STONE WALL DISSIPATER Remnants of stone wall dissipater NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_final.docx PHOTO 7. VIEW FACING WEST OF BIKE PATH AND TREES TO BE REMOVED PHOTO 8. VIEW FROM BIKE PATH WITH SINKHOLE FORMING (NOVEMBER 2023) NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_final.docx PHOTO 9. SOILS IN WETLAND AREA WEST OF CHANNEL PHOTO 10. VIEW OF WETLAND AREA WEST OF CHANNEL NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_final.docx APPENDIX E LIST OF ABUTTERS NOTICE OF INTENT DRAIN OUTFALL RESTORATION NEAR ADARE PLACE NORTHAMPTON, MASSACHUSETTS M:\Adare Place\Bike Path Culvert Fix_DPW Design\Permitting\WPA\NOI Report_final.docx LIST OF ABUTTERS WITHIN 100 FT OF PROJECT SITE AND DOWNSTREAM ADJACENT PROPERTIES PARCEL ID OWNER NAME STREET ADDRESS MAILNG ADDRESS CITY STATE ZIP CODE 24A-055-001 Daniel & Tracey Polacheck 130 Jackson S 95 Jackson St Northampton MA 01060 24A-202-001 Norice McGrath 49 Murphy Ter 49 Murphy Terr Northampton MA 01060 24A-210-001 William Abrashkin 26 Adare Pl 26 Adare Place Northampton MA 01060 24A-212-001 Christian Salmon 40 Adare Pl 40 Adare Place Northampton MA 01060 24A-213-001 Susan Weiss 39 Adare Pl 39 Adare Place Northampton MA 01060 24B-041-001 Aster Associates LLC Barrett St Annx P.O. Box 3220 Amherst MA 01004 24B-044-001 Thomas G Hart 40 Barrett St 40 Barrett Street Northampton MA 01060 24B-045-001 Peter Feitner & Christine Knox 38 Barrett St 70 Porter Hill Rd Cummington MA 01026 24B-085-001 Safe Passage Inc 76 Carlon Dr 43 Center St, Suite 304 Northampton MA 01060 24B-073-001 Kevin Brown 74 Barrett St 74 Barrett St #102 Northampton MA 01060 24B-073-004 Coachlight 105 LLC 74 Barrett St P.O. 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