US Bridges

US 20 EB over RR Mbta/Bmrr

Fair

Middlesex County, Massachusetts · O · Structure no. W290112E6DOTNBI

Built
1950
75 years old, rebuilt 1960
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
140 ft
3 main spans
Daily traffic
22,400
2023 count
Owner
State
State Highway Agency

About this bridge

US 20 EB over RR Mbta/Bmrr is a steel stringer/multi-beam or girder carrying US 20 EB over RR Mbta/Bmrr in Middlesex County, Massachusetts. It was built in 1950 and reconstructed in 1960, 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. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 22,400 vehicles a day, roughly 7% of them trucks, projected to reach 36,324 by 2032. The structure is 140 ft (42.7 m) long and 36 ft wide.

Location

Open in Google Maps
CarriesUS 20 EB
CrossesRR Mbta/Bmrr
LocationO
RouteU.S. Route 20
CountyMiddlesex County
StateMassachusetts
Coordinates42.36924, -71.27116
Functional classUrban Other Principal 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, would be posted or closed except for temporary shoring
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.4 US tons
Inventory rating36.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length140 ft (42.7 m)
Longest span64 ft (19.5 m)
Deck width36 ft (11.1 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,400 (2023)
Projected traffic36,324 by 2032
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed—
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$4.6 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 20 EB over RR Mbta/Bmrr built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1960.

What condition is US 20 EB 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 February 2023.

How much traffic does US 20 EB over RR Mbta/Bmrr carry?

About 22,400 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US 20 EB over RR Mbta/Bmrr?

The structure is 140 ft (42.7 m) long with a longest span of 64 ft (19.5 m) and a deck 36 ft wide.

Who owns US 20 EB over RR Mbta/Bmrr?

It is owned by the State Highway Agency.