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MBTA - Merrimack River Bridge

Photo 

Photo taken by Paul Shea

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BH Photo #270219

Map 

Street Views 

Description 

Former Manchester & Lawrence (M&L) branch.

This bridge is a six-span, pin-connected Pratt deck truss, originally designed to carry two tracks, but presently carrying only one. The superstructure was fabricated by Cofrode and Saylor in 1893. In the original drawings, the upper chord and verticals are of steel, while most of the diagonals and lower chords are of wrought-iron bars, pinned in groups of six. Four 15-foot deep Pratt-truss systems, interconnected by girders and struts, support the deck. -Massachusetts Historical Commission (Peter Stott, MBTA Historical Property Survey, 9/1988)

Facts 

Overview
Warren deck truss bridge over Merrimack River on Railroad (MBTA)
Location
Lawrence, Essex County, Massachusetts
Status
Abandoned
History
Built 1893
Builders
- Cofrode & Saylor of Philadelphia, Pennsylvania
- Philadelphia Bridge Works of Philadelphia, Pennsylvania
Railroads
- Boston & Maine Railroad (B&M; BM)
- Commuter Rail
- Massachusetts Bay Transportation Authority (MBTA)
Design
Warren deck truss
Dimensions
Length of largest span: 140.0 ft.
Total length: 840.0 ft.
Deck width: 37.5 ft.
Also called
B&M - M&L Branch Bridge No. 0.32
B&M - M&L Branch Bridge No. 191
Approximate latitude, longitude
+42.70130, -71.16529   (decimal degrees)
42°42'05" N, 71°09'55" W   (degrees°minutes'seconds")
Approximate UTM coordinates
19/322654/4729918 (zone/easting/northing)
Quadrangle map:
Lawrence
Inventory number
BH 58787 (Bridgehunter.com ID)

Update Log 

  • February 1, 2015: Updated by Ian Martin: Added build info. & dimensions
  • November 13, 2013: Added by Luke Harden

Sources