Description
The Massachusetts Department of Transportation is seeking qualified contractors to replace the aging Webster Avenue bridge (Bridge S‑17‑016) that crosses MBTA commuter‑rail tracks and the Boston‑Mystic Rail Road in Somerville. The project includes complete demolition of the existing steel‑girder bridge, construction of a new single‑span steel‑plate‑girder bridge with concrete deck, extensive utility relocations (electric, gas, water, sewer, telecommunications, fire‑alarm, and MBTA PTC fiber), installation of modern traffic‑control and intelligent‑transportation‑system devices, and deep micropile foundations socketed into bedrock. The contract is estimated at $12 million and requires compliance with federal‑aid, Buy‑America, labor‑participation, and environmental regulations.
• New steel‑plate‑girder superstructure with 24‑ft roadway, sidewalks, and bike lane.
• Micropile foundation system (≈19 ft deep, 10.75 in OD steel casings) and associated geotechnical testing.
• Comprehensive utility coordination: Eversource electric & gas, MWRA water, Verizon, MBTA PTC fiber, fire‑alarm, and numerous municipal services.
• Installation of traffic‑signal equipment, power pedestals, vehicle‑detection systems, connected work‑zone notification system, and roadway lighting.
• Required subcontractor pre‑qualification, bid guaranty (5 % of bid), and strict schedule constraints (bid due Oct 6 2026, bid opening Oct 20 2026).