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Lynn Commuter Rail Station Slope Stabilization Design-Build

Lynn, Massachusetts

Client/Owner: Massachusetts Bay Transportation Authority (MBTA)
1,000 CY Excavation
5,000 SF Concrete Slab Demolition
400 LF 10 Ft. High, Engineered Wall in 2 Sections
About This Project
Located just 11.5 miles north of Boston, busy Lynn Central Commuter Rail Station serves an average of 67 combined inbound/outbound weekday trips on the MBTA's Rockport/Newburyport service originating from North Station. Built in 1992 as part of a major station rehabilitation, gunite slopes designed to support a direct fixation (DF) track slab system carrying 600 LF of inbound tracks alongside the station had deteriorated over time, compromising the integrity of the busy station. To Address the issue, the client called upon LM Heavy Civil Construction, LLC (LMH) to deliver this important $1 million fast-track, design/build(D/B), slope stabilization project. The work involved approximately 1,000 CY of heavy excavation, including demolition of gunite slope and 5,000 SF of concrete slabs. A new engineered wall was installed in teo 10-foot high sections totaling 440 LS in length. The work also included approximately 100 LF in expansion joint repairs and 650 LF of new drainage. LMH developed detailed solutions to deal with the numerous site constraints, including seven separate staging areas and upwards of 30 ft. diffrence in elevation, delivering this project in three consecutive weekends, with interrupting service.
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