US Bridges

ST 27 N Main ST over RR Mbta/Csx

Good

Middlesex County, Massachusetts · 0.2 Mi. N. of RT-135 · Structure no. N0300629PDOT634

Built
1895
130 years old, rebuilt 1995
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
83 ft
1 main span
Daily traffic
23,000
2014 count
Owner
State
State Highway Agency

About this bridge

ST 27 N Main ST over RR Mbta/Csx is a steel stringer/multi-beam or girder carrying ST 27 N Main ST over RR Mbta/Csx in Middlesex County, Massachusetts. It was built in 1895 and reconstructed in 1995, so it is 130 years old, older than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 23,000 vehicles a day, roughly 10% of them trucks, projected to reach 36,324 by 2031. The structure is 83 ft (25.3 m) long and 62 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesST 27 N Main ST
CrossesRR Mbta/Csx
Location0.2 Mi. N. of RT-135
RouteState Highway 27
CountyMiddlesex County
StateMassachusetts
Coordinates42.2856, -71.34806
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating81.8 US tons
Inventory rating60 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length83 ft (25.3 m)
Longest span69 ft (21 m)
Deck width62 ft (19 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,000 (2014)
Projected traffic36,324 by 2031
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$482,000 (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 27 N Main ST over RR Mbta/Csx built?

It was built in 1895, making it 130 years old in 2025. It was reconstructed in 1995.

What condition is ST 27 N Main ST over RR Mbta/Csx in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does ST 27 N Main ST over RR Mbta/Csx carry?

About 23,000 vehicles per day (2014 count), of which roughly 10% are trucks.

How long is ST 27 N Main ST over RR Mbta/Csx?

The structure is 83 ft (25.3 m) long with a longest span of 69 ft (21 m) and a deck 62 ft wide.

Who owns ST 27 N Main ST over RR Mbta/Csx?

It is owned by the State Highway Agency.