US Bridges

HWY Medford ST over RR Mbta/Bmrr

Fair

Middlesex County, Massachusetts · .7 MI SW of JCT SR28&38 · Structure no. S170073G4DOT634

Built
1910
115 years old, rebuilt 1983
Condition
Fair
inspected October 2023
Type
Girder and Floorbeam System
Steel
Length
150 ft
2 main spans
Daily traffic
14,800
2024 count
Owner
State
State Highway Agency

About this bridge

HWY Medford ST over RR Mbta/Bmrr is a steel girder and floorbeam system carrying HWY Medford ST over RR Mbta/Bmrr in Middlesex County, Massachusetts. It was built in 1910 and reconstructed in 1983, so it is 115 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 14,800 vehicles a day, roughly 10% of them trucks, projected to reach 19,741 by 2032. The structure is 150 ft (45.7 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHWY Medford ST
CrossesRR Mbta/Bmrr
Location.7 MI SW of JCT SR28&38
RouteCity Street 0
CountyMiddlesex County
StateMassachusetts
Coordinates42.38743, -71.0954
Functional classUrban Minor Arterial

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 inspectionOctober 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating55.2 US tons
Inventory rating29.1 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length150 ft (45.7 m)
Longest span140 ft (42.7 m)
Deck width50 ft (15.2 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,800 (2024)
Projected traffic19,741 by 2032
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 SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$6.8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Medford ST over RR Mbta/Bmrr built?

It was built in 1910, making it 115 years old in 2025. It was reconstructed in 1983.

What condition is HWY Medford ST 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 October 2023.

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

About 14,800 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is HWY Medford ST over RR Mbta/Bmrr?

The structure is 150 ft (45.7 m) long with a longest span of 140 ft (42.7 m) and a deck 50 ft wide.

Who owns HWY Medford ST over RR Mbta/Bmrr?

It is owned by the State Highway Agency.