Red Line Hi‑Rail Access Tunnel – Design‑Build Services (Y42CN01)

The Massachusetts Bay Transportation Authority seeks a design‑build entity to construct a new hi‑rail access tunnel for the Red Line in Cambridge, providing a dedicated vehicle access point to the existing subway tunnel. The scope includes full engineering, permitting, construction of a 15‑ft‑wide, 14‑ft‑high access ramp with a maximum 11.7 % grade, installation of flood doors, security systems, utility relocations, contaminated‑soil remediation, and full commissioning. The contractor must comply with stringent MBTA safety, environmental, and prevailing‑wage requirements, manage a $42 million construction budget, and meet a schedule of roughly 2.8 years from notice to proceed. • Design‑build of a new underground access tunnel (≈150 ft) with associated structural, electrical, and mechanical systems. • Required handling of asbestos‑containing soils, de‑watering, and storm‑water management per MassDEP. • Mandatory coordination with MBTA’s track‑access, security, and PTC protection procedures, including a pre‑proposal site visit. • Payment based on a lump‑sum contract (estimated $42 M) with allowances for traffic officers, busing, and risk contingencies. • Strict compliance with Massachusetts prevailing‑wage rates, non‑discrimination, and undocumented‑worker certifications.