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MBTA - Shawsheen River Bridge

Map 

Description 

"The Boston and Lowell Railroad, chartered in June of 1830, completed its main line in June of 1835. The Boston and Maine Railroad acquired control of the Boston and Lowell Railroad in 1887 and the MBTA purchased the "New Hampshire Main Line" in 1976.

This double track, single span, rubble stone arch bridge carries two tracks over the Shawsheen River. The thirty-foot span is the last of the original arch structures on the line. The span is about 16 feet less than the Mystic River bridge (milepost 5.11), the only other single-span 19th-century structure on the line. The water level is approximately 8.3 feet from the crown of the arch and approximately 18 feet from the base of the track rail.

A corrugated, galvanized steel liner installed in 1940 reinforces the arch. The space between the stone arch and the steel liner is approximately eight inches thick and is filled with grout. The liner has a reinforced concrete footing."

-Peter Stott, MBTA Historical Property Survey Phase II, 9/1988

Facts 

Overview
Stone arch bridge over Shawsheen River on MBTA Lowell Line
Location
Wilmington, Middlesex County, Massachusetts
Status
Open to traffic
History
Built 1835, steel liner arch added 1940, scheduled for rehabilitation
Railroads
- Boston & Maine Railroad (B&M; BM)
- Commuter Rail
- Massachusetts Bay Transportation Authority (MBTA)
Design
Stone arch
Dimensions
Length of largest span: 28.8 ft.
Total length: 56.0 ft.
Deck width: 43.8 ft.
Also called
B&M New Hampshire Main Line Bridge 17.92
Approximate latitude, longitude
+42.57053, -71.21503   (decimal degrees)
42°34'14" N, 71°12'54" W   (degrees°minutes'seconds")
Approximate UTM coordinates
19/318200/4715502 (zone/easting/northing)
Inventory number
BH 71154 (Bridgehunter.com ID)

Update Log 

  • February 27, 2016: Added by Ian Martin