pdf of PPT Presentation 606552 NOI Continuance 2020 04 23- FINALProject Update
I-91 Bridge Replacement over U.S. Route 5, B&M RR,
and Hockanum Road
Northampton | Project File No. 606552
Conservation Commission Meeting
Via Zoom on-line meeting App, due to COVID-19
April 23, 2020 | 5:30 PM
•Paul King – MassDOT Project Manager
–Robert Natario – MassDOT District 2 Environmental
•Haris Awal – Parsons Project Manager, Design Consultant
–Steven Cronkite – Parsons Planner, Design Consultant
–Cory Grayburn – Parsons Planner, Design Consultant
I-91 Bridge Replacement over U.S. Route 5, B&M RR
and Hockanum Road
Northampton | Project File No. 606552
Introduction
I-91 at Exit 18 and Hockanum Road
Limits of Work
Project Area
I-91 Bridge Replacement over U.S. Route 5, B&M RR and
Hockanum Road
Northampton | Project File No. 606552
I-91 at Exit 18 and Hockanum Road
Limits of Work
Project Area
I-91 Bridge Replacement over U.S. Route 5, B&M RR and
Hockanum Road
Northampton | Project File No. 606552
I-91 at Exit 18 and Hockanum Road
Limits of Work
Project Area
I-91 Bridge Replacement over U.S. Route 5, B&M RR and
Hockanum Road
Northampton | Project File No. 606552
Changes since the original NOI submittal on December 24, 2019
and the Conservation Commission Meeting on January 23, 2020
Project Updates
I-91 Bridge Replacement over U.S. Route 5, B&M RR and
Hockanum Road
Northampton | Project File No. 606552
What Changed Original NOI Submittal Updated NOI
Soil Test Report for
Bioretention Ponds Not included. Included.
I-91 Bioretention Pond Design No underdrain.
Existing trees not mapped.
Underdrain added.
Existing trees surveyed, avoided
where possible.
Route 5 Bioretention Pond
Design
No underdrain. Underdrain added.
Flood Storage Compensation
Area
Designed based on available
survey; survey update was in
progress.
Design revised based on
updated survey.
Landscaping Minimal landscaping proposed.
Additional landscaping
proposed and shown on
dedicated landscaping sheet.
Project Updates
I-91 Bridge Replacement over U.S. Route 5, B&M RR and
Hockanum Road
Northampton | Project File No. 606552
Impacts & Mitigation Original NOI Submittal Updated NOI Comments
Wetlands (BVW) Impact
(s.f.)
174 Perm.
8,688 Temp.
174 Perm.
8,688 Temp.No Change.
Wetlands (BVW) Creation
(s.f.) 215 215 No Change.
BLSF (s.f.)24,695 33,688
Increased due to base mapping
updates.
Flood Storage Impact (c.y.) 1,640 1,874
Increased due to base mapping
updates.
Flood Storage Creation (c.y.)1,793 1,897 Increased by adding a retaining wall.
Resource & Mitigation Overview Map
I-91 Bridge Replacement over U.S. Route 5, B&M RR and
Hockanum Road
Northampton | Project File No. 606552
I-91 Bioretention Pond
I-91 Bridge Replacement over U.S. Route 5, B&M RR and
Hockanum Road
Northampton | Project File No. 606552
I-91 Bioretention Pond - Detail
I-91 Bridge Replacement over U.S. Route 5, B&M RR and
Hockanum Road
Northampton | Project File No. 606552
US Route 5 Bioretention Pond
I-91 Bridge Replacement over U.S. Route 5, B&M RR and
Hockanum Road
Northampton | Project File No. 606552
US Route 5 Bioretention Pond - Detail
I-91 Bridge Replacement over U.S. Route 5, B&M RR and
Hockanum Road
Northampton | Project File No. 606552
Flood Storage Compensation Area
I-91 Bridge Replacement over U.S. Route 5, B&M RR and
Hockanum Road
Northampton | Project File No. 606552
Flood Storage Compensation Area - Detail
I-91 Bridge Replacement over U.S. Route 5, B&M RR and
Hockanum Road
Northampton | Project File No. 606552
I-91 over U.S. Route 5, B&M RR and Hockanum Road
Northampton | Project File No. 606552
MA WPA Resource Impacts & Mitigation
Bordering Land Subject to Flooding (BLSF) and Flood Storage Volume
Elevation (range,
in feet)
Route 5 Embankment Fill
(cubic yards)
Proposed Compensation
(cubic yards)
Net flood storage
increase (decrease)
122.3-122 335.7 26.5 -309.1
122-121 1074.5 78.5 -996.0
121-120 154.5 61.9 -92.6
120-119 128.6 82.0 -46.6
119-118 89.0 115.0 26.1
118-117 48.3 194.6 146.3
117-116 20.6 185.0 164.4
116-115 11.1 201.4 190.3
115-114 6.7 218.0 211.3
114-113 3.6 236.4 232.8
113-112 1.1 206.9 205.9
112-111 0.5 290.5 289.9
Total (Cu. yd):1874.0 1896.6 22.7
The project will fill approximately 33,688 square feet of BLSF in order to widen the US Route 5
roadway, and will create approximately 11,880 square feet of new BLSF.
The project will displace approximately 1,874 cubic yards of flood storage below the 100-year flood
elevation 123.0 feet NGVD29 (122.3 feet NAVD88) (the 100-year flood elevation) in order to widen
the US Route 5 roadway embankment. Proposed fill and compensation volumes, by 1-foot elevation
increment:
Landscape Plan
I-91 Bridge Replacement over U.S. Route 5, B&M RR and
Hockanum Road
Northampton | Project File No. 606552
Landscape Plan - Detail
I-91 Bridge Replacement over U.S. Route 5, B&M RR and
Hockanum Road
Northampton | Project File No. 606552
• NEPA Categorical Exclusion - complete
• MEPA ENF – Submitted to the Secretary of Energy and Environmental
Affairs on April 1, 2020 and published in the Environmental Monitor on
April 22, 2020.
• Section 106 (Historic/Cultural resources) – no impacts. (Bridges found
‘not eligible’).
• MA WPA NOI submitted to Con Comm for wetland impact & mitigation.
Update at 4/23 Continuance: additional fee, soils testing, survey updates,
design revisions.
• Section 401 WQC submitted to MassDEP Jan. 2020. In review; and
updates have been provided to MassDEP.
• Section 404 Permit – SV to be submitted to ACOE.
• Rare Species review complete including NLEB (bat) coordination.
• NPDES Construction General Permit eNOI to be submitted to EPA after
Contractor is selected.
• Section 408 review -- coordination with ACOE regarding flood control
levee – completed.
I-91 Bridge Replacement over U.S. Route 5, B&M RR and
Hockanum Road
Northampton | Project File No. 606552
Environmental Permitting
Project Schedule
Conservation
Committee Meeting
January 23, 2020
Conservation
Committee Meeting
April 23, 2020
100% Design Submittal
May 2020
Construction Starts
Fall 2020
I-91 Bridge Replacement over U.S. Route 5, B&M RR and
Hockanum Road
Northampton | Project File No. 606552
Paul King, MassDOT Project Manager
paul.c.king@state.ma.us;
Cell: 617-939-6915
I-91 Bridge Replacement over U.S. Route 5, B&M RR
and Hockanum Road
Northampton | Project File No. 606552
Contact Information
Thank You
Q&A
Conservation Commission Meeting
Via Zoom on-line meeting App, due to COVID-19
April 23, 2020 | 5:30 PM
I-91 Bridge Replacement over U.S. Route 5, B&M RR,
and Hockanum Road
Northampton | Project File No. 606552