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Merrimack River Bridge Rehabilitation (LMH-Cmc JV)

Haverhill, Massachusetts

Client/Owner: Massachusetts Bay Transportation Authority (MBTA)
40,000 High Strength Bolts
84 Mini Piles
The Merrimack River Bridge is a Warren truss with verticals, fabricated by the Bethlehem Steel Bridge Company in Steelton, Pennsylvania plant in 1920.
About This Project
LM Heavy Civil Construction, LLC (LMH) and Joint Venture Partner Cooperativa Muratori & Cementisti - Cmc Di Ravena Società Cooprerativa (LMH's ultimate parent company) are currently preforming MBTA Contract No. B64CN01, a $24 million project involving rehabilitation of the 5-span Merrimack River Bridge (BR. No, H-12-061A1F) over the Merrimack River; the 4-span North Approach Bridge (BR. No. H-12-061-749) over land; and the 2-span  Washington Street Bridge (BR. No. H-12-029-857) over road, for a total extension of over 1,300 lineal feet. Combined, the Bridges carry the West Route Commuter Rail Service, Amtrak Service between Boston and Maine and Pan Am Freight Service. Bridge superstructure work includes: partial demolition; repair of deteriorated steel structural members; strengthening of existing structural members; replacement of portion of existing superstructure; replacement of existing bearings and deteriorated rivets; and superstructure painting. bridge substructure work includes repair  and strengthening, as well as repointing/ grouting of mortar joints. Trackwork involves removal and reinstallation of existing bridge ties and replacement of existing jointed rail with continuous welded rail.
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