Main Street Bridge
MBTA - Main Street Bridge - S Acton
Photo from old postcard
BH Photo #466731
"A relatively late example of the commonest metal truss bridge sub-type found in Massachusetts — the rivetted Warren pony truss.
Approximately 225 metal truss bridges of all types (not counting bridges which use metal trusses only in approach spans) have been identified to date in the MDPW statewide computer print-out. Of the 108 examples whose sub-types have been catalogued to date, 15 are deck trusses, 24 are through trusses, and 69 are pony trusses. 51 of the 70 pony trussess are Warrens and all 51 are rivetted. Built by an important and extremely prolific Massachusetts bridge-building company (47 surviving Boston Bridge Works bridges are currently listed in the statewide builders' and designers' index) but not a particularly early or important example of their work." - S.J. Roper, 10/17/1984
- Pony truss bridge over MBTA on Main Street SR 27
- South Acton, Middlesex County, Massachusetts
- Replaced by a new bridge
- Built 1906; replaced 1997
- - Boston Bridge Works of Boston, Massachusetts
- - Boston & Maine Railroad (B&M; BM)
- Massachusetts Bay Transportation Authority (MBTA)
- Warren pony truss with all verticals
Length of largest span: 86.9 ft.
Total length: 89.9 ft.
Deck width: 52.0 ft.
- Approximate latitude, longitude
- +42.45998, -71.45448 (decimal degrees)
42°27'36" N, 71°27'16" W (degrees°minutes'seconds")
- Approximate UTM coordinates
- 19/298190/4703768 (zone/easting/northing)
- Inventory number
- BH 88408 (Bridgehunter.com ID)
- May 21, 2020: Updated by Ian Martin: Merged MACRIS Database info; bridge has been replaced
- March 2, 2020: New photo from Geoff Hubbs