US Bridges

HWY Washngton ST over Comb I 90 & Csx/Mbta

Fair

Middlesex County, Massachusetts · At Int 17 S31 · Structure no. N120144R8DOTNBI

Built
1964
61 years old, rebuilt 1995
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
220 ft
4 main spans
Daily traffic
33,750
2024 count
Owner
State
State Highway Agency

About this bridge

HWY Washngton ST over Comb I 90 & Csx/Mbta is a steel stringer/multi-beam or girder carrying HWY Washngton ST over Comb I 90 & Csx/Mbta in Middlesex County, Massachusetts. It was built in 1964 and reconstructed in 1995, so it is 61 years old, younger 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 33,750 vehicles a day, roughly 7% of them trucks, projected to reach 21,478 by 2032. The structure is 220 ft (67.1 m) long and 82 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesHWY Washngton ST
CrossesComb I 90 & Csx/Mbta
LocationAt Int 17 S31
RouteInterstate 90
CountyMiddlesex County
StateMassachusetts
Coordinates42.35682, -71.18369
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.4 US tons
Inventory rating54.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length220 ft (67.1 m)
Longest span56 ft (17.1 m)
Deck width82 ft (25.1 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,750 (2024)
Projected traffic21,478 by 2032
Trucks7%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$16.6 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Washngton ST over Comb I 90 & Csx/Mbta built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1995.

What condition is HWY Washngton ST over Comb I 90 & Csx/Mbta 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 January 2024.

How much traffic does HWY Washngton ST over Comb I 90 & Csx/Mbta carry?

About 33,750 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is HWY Washngton ST over Comb I 90 & Csx/Mbta?

The structure is 220 ft (67.1 m) long with a longest span of 56 ft (17.1 m) and a deck 82 ft wide.

Who owns HWY Washngton ST over Comb I 90 & Csx/Mbta?

It is owned by the State Highway Agency.