mile long segment of a multi-use recreational trail. Work includes; - PowerPoint PPT Presentation

• ARRT through Maynard and Acton is a 3.42- mile long segment of a multi-use recreational trail. • Work includes; – Construction of paved 8 to 12 foot wide multi-use recreational trail with one to two foot graded stone dust shoulders on either side; – Construction of a parking lot at Winter Street and Florida Road; – Replacement of the existing pedestrian bridge over the Assabet River in downtown Maynard with a 65’ long prefabricated steel truss bridge.

• May 1997: The five ARRT communities (Marlborough, Hudson, Stowe, Maynard, and Acton) received $668,000 in state funding to acquire the rights-of-ways of the former rail line • September 2002: The town of Maynard acquires all necessary land rights to allow for the construction of the ARRT • October 2004: ARRT volunteers completed a 12 month effort to clear and place woodchips on two sections of the trail, each 1000 feet in length. The woodchips create an interim walking path, until the final bike path is built. • November 2011: Maynard/Acton 25% Design completed by AECOM • March 2014: Rail road rails removed from length of trail in Maynard & Acton

Existing Resource Areas

Existing Resource Areas – Taylor Brook

Existing Resource Areas – Assabet River at Tobin Park

Existing Resource Areas – Intermittent Streams/RR Ditches

Existing Resource Areas – Pratt’s Brook (Acton)

Permit Requirements

Permit Requirements • WPA – Process ongoing o MassDEP has issued File No. 213-0262 for NOI o ORAD confirming resource area boundaries issued by Maynard Conservation Commission on 12/4/14 • Section 404 ACOE Individual Permit • Section 401 Water Quality Certification • Chapter 91 Waterways filed and pending • MEPA – ENF filed on 3/9/15; Awaiting comment • Categorical Exclusion Checklist • MassDOT Hazardous Materials Clearance • Section 106 Clearance

Resource Area Impact Summary

Impact Summary Table 1: Wetland Resource Area Impacts - Maynard - Assabet River Rail Trail Wetland Resource Area Impacts LUW/other Waters of BVW/VW ROW STA the U.S. Brook Name Comments No. # Bank(lf) BLSF Sq. ft BLSF c.f. Perm. (sf) Temp. (sf) Perm. (sf) Temp. (sf) TOTAL 262.89 372.84 1478.70 1329.92 357.75 5784.00 1936.51 • Total Permanent and temporary vegetated wetland alteration is 635.73 square feet. • Based on the “no - rise” results of the hydraulic analyses 1 , compensatory storage volume is not being proposed for the BLSF embankment encroachment at Taylor Brook and the transitional ramp fill in Tobin Park. Work within BLSF will not restrict flows or result in an increase in flood stage or velocity. • Total 200-foot Riverfront Area is approximately 255,275 square feet. Total 200-foot Riverfront Area alteration is approximately 54,181 square feet, of which 17,190 square feet is within the Inner 100-feet. 27,875 of the 54,528 square feet (51%) of Riverfront Area to be impact in Maynard is Previously Developed Riverfront Area under the Act at 310 CMR 10.58 (5). Additionally, 117 square feet of Riverfront area alteration is associated with a limited project. 1 HEC-RAS Analysis Assabet River Rail Trail Acton & Maynard, Massachusetts MassDOT Project #604531; Prepared by Nover- Armstrong Associates, Inc; prepared for Greenman-Pedersen, Inc.; dated November 2014.

Impact Summary – Taylor Brook • Reduction in parking BLSF REGION 1 spaces at Ice House STA. 13+00 to STA. 19+00 ( 276.36 SF) Landing Parking lot Volume by Interval has minimized outer Interval (CY) 177-178 0 RA impact in the 178-179 0.42 area from 15,775 179-179.4 0.72 square feet to 13,106 Total 1.14 square feet. Proposed Ice House Landing Parking Area

Impact Summary – Assabet River/Pedestrian Bridge Following the issuance of BLSF REGION 2 STA. 65+00 to STA. 66+00 (1053.56 SF) the NOI, parking was added Volume by Interval at Sta. 62+00 before the Interval (CY) 158-159 0.00 Maynard Bridge. This 159-159.96 12.11 increased the outer riparian Total 12.11 riverfront impacts here from 9,149.65 square feet to 11,124.77 square feet.

Impact Summary – Intermittent Streams/RR Ditches

Impact Summary – Intermittent Streams/RR Ditches • AECOM Appendix Wetland Resource Area Impacts LUW/other ROW BVW/VW Waters of the B Wildlife Habitat STA No. Brook Name Comments U.S. Bank(lf) # Perm. Temp. Perm. Temp. Evaluation (sf) (sf) (sf) (sf) Permanent impacts to LUW reached a finding Railroad meet all performance 102+50 1173.05 drainage swale standards detailed at 310 CMR 10.56(4). of “no substantial 103 + Railroad Bank restoration proposed at 182.40 25 drainage swale impact location. reduction in the Temporary LUW impacts to Railroad 105+75 1327.03 be restored at impat drainage swale capacity to location. Bank restoration proposed at impact location. Permanent provide important 108+50 Railroad impacts to LUW will meet all to 1028.90 3385.56 drainage swale performance standards 109+50 wildlife habitat detailed at 310 CMR 10.56(4). 110 + Railroad Permanent impacts to BVW functions drainage swale 126.41 00 RT to be fully replicated. Temporary impacts to BVW identified within to be restored in place. Railroad Permanent impacts to LUW 110+50 194.43 1225.39 310.40 the Bank Impact drainage swale will meet all performance standards detailed at 310 CMR 10.56(4) Areas”. 111 + Railroad Impacts to bank to be fully 267.40 00 drainage swale restored at impact location. Temporary LUW impacts to Railroad 112+50 214.40 be restored at impact drainage swale location. Temporary LUW impacts to Railroad 120+00 84.68 be restored at impact drainage swale location. TOTAL 126.41 194.43 1478.70 5784.00 1936.51

Mitigation

Mitigation Area 1 • Located approximately 280 feet west of the bank of Taylor Brook • 150 square feet in size

Mitigation Area 2 • Located approximately 1000 feet South of the Maynard/Acton town boundary and West of Brown Street (Route 27). • 1,650.8 square feet in size • Provides mitigation for impacts associated with the intermittent streams/RR ditches.

Mitigation Summary BVW BVW Alteration Mitigation 262.89 1800.8 Square feet Square feet • The replication areas have been designed to comply with the General Performance Standards listed at 310 CMR 10.55(4)(b)(1-7).

NHESP Mapped Vernal Pool

NHESP Mapped Vernal Pool • NHESP Mapped Certified Vernal Pool (CVP #4183) located at within Assabet River National Wildlife Refuge in Stowe, approximately 350 feet southwest of the beginning of the Trail in Maynard. • The CVP is separated from the project limits by the presence of White Pond Road. • An additional depression, not mapped by NHESP, is identified on the Project plans in the vicinity of Taylor Brook at approximately Sta. 22+50 to 24+00.

Stormwater Compliance • The Project will meet the Stormwater Standards at M.G.L.c.131, Sec. 40 to the maximum extent practicable as required by all footpath, bikepath and path for pedestrian and/or non-motorized vehicle Projects. • Meets Stormwater Standards 1,2,3,6,7,8,9 • Meets Stormwater Standard 4 to the extent practicable • Stormwater Standard 5 not applicable