merrimack river bridge rehabilitation project contract #2-substructure improvements contract...
TRANSCRIPT
Draft for Discussion & Policy Purposes Only
Merrimack River Bridge Rehabilitation Project
Contract #2-Substructure Improvements
Contract #B64CN02
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Project Overview
Draft for Discussion & Policy Purposes Only
• Three connected bridges in Haverhill, MA - Merrimack River, North Approach, and Washington St. Bridges; 12 spans total: 1,042 feet.
• Used by MBTA Commuter Rail, Amtrak Downeaster, and Pan Am freight. Daily service includes approximately 36 passenger trains and 10 freight trains.
• Project is broken up into two separate contracts due to the unique requirements for rehabilitating a historic bridge and in-river; masonry substructures
• Contract 1 is Superstructure repair and land substructure strengthening• Contract 2 Contract is river pier scour mitigation• Total Project Budget: $99,031,203• Total Construction Budget: $68,921,133
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Contract #1 (B64CN01)Design-Bid-Build Superstructure Rehabilitation
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• Contract ongoing with LMH/CMC. Award amount $23,937,000.• Strengthen structural members• Clean and paint• Replace bearings• Improve seismic performance• Historic Bridge Rehabilitation
better suited using D-B-B because of greater end product control
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Contract #2 (B64CN02)Design-Build – Substructure Improvements
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• River piers scour countermeasures• Improve integrity of pier foundations• Reasons for going Design-Build:
1. Contractor input because thecomplexity of the project andthe constructability will dictatethe final design from contractor means and methods 2. Access to specialized marineexperience and equipment
3. Alternate technical concepts
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Contract #2 (B64CN02)Design-Build – Substructure Improvements
Draft for Discussion & Policy Purposes Only
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Project Benefits
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• Extend the life of the historic bridges.
• Lift current speed restriction which is 15 MPH for Commuter Rail and 5 MPH for Freight traffic.
• Improve protection of piers against river bottom undermining erosion (scour).
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Design Build Team Selection
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• Seven firms responded to RFQ and LOI, three teams shortlisted.• Selected teams submitted Alternate Technical Concepts (ATCs) followed by
review of ATCs, submission of proposals and oral presentations.• As listed below a combination of the price proposal and technical score resulted
in Cianbro as the “Best Value Scorer”
Description Cianbro Engineer (HDR) SPS JF White
PRICE (Contract Amount) $ 28,270,000 $31,497,000 $ 31,970,000 $ 55,795,000
TECHNICAL SCORE (points) 89.21 - 81.85 81.75
TOTAL SCORE (Price/point) 316,892.73 - 390,592.55 682,507.65
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