US Bridges

ST 2 over RR Mbta/Bmrr

Fair

Middlesex County, Massachusetts · MM113.7 0.5 MI E Rt 495 · Structure no. L1301827CDOTNBI

Built
1950
75 years old, rebuilt 1990
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
174 ft
3 main spans
Daily traffic
42,826
2023 count
Owner
State
State Highway Agency

About this bridge

ST 2 over RR Mbta/Bmrr is a steel continuous stringer/multi-beam or girder carrying ST 2 over RR Mbta/Bmrr in Middlesex County, Massachusetts. It was built in 1950 and reconstructed in 1990, so it is 75 years old, older than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 42,826 vehicles a day, roughly 4% of them trucks, projected to reach 60,803 by 2031. The structure is 174 ft (53 m) long and 89 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesST 2
CrossesRR Mbta/Bmrr
LocationMM113.7 0.5 MI E Rt 495
RouteState Highway 2
CountyMiddlesex County
StateMassachusetts
Coordinates42.51779, -71.5017
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating66.8 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length174 ft (53 m)
Longest span57 ft (17.4 m)
Deck width89 ft (27 m)
Roadway width76 ft (23.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,826 (2023)
Projected traffic60,803 by 2031
Trucks4%
Lanes on structure4
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$14.2 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 2 over RR Mbta/Bmrr built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1990.

What condition is ST 2 over RR Mbta/Bmrr in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.

How much traffic does ST 2 over RR Mbta/Bmrr carry?

About 42,826 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is ST 2 over RR Mbta/Bmrr?

The structure is 174 ft (53 m) long with a longest span of 57 ft (17.4 m) and a deck 89 ft wide.

Who owns ST 2 over RR Mbta/Bmrr?

It is owned by the State Highway Agency.