US Bridges

ST 16 Eb/Wshgtn ST over Comb I 90 & Csx/Mbta

Fair

Middlesex County, Massachusetts · At Int 16 S17 · Structure no. N120154QXDOTNBI

Built
1964
61 years old, rebuilt 1996
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
210 ft
4 main spans
Daily traffic
17,600
2024 count
Owner
State
State Highway Agency

About this bridge

ST 16 Eb/Wshgtn ST over Comb I 90 & Csx/Mbta is a steel stringer/multi-beam or girder carrying ST 16 Eb/Wshgtn ST over Comb I 90 & Csx/Mbta in Middlesex County, Massachusetts. It was built in 1964 and reconstructed in 1996, 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 17,600 vehicles a day, roughly 6% of them trucks, projected to reach 21,478 by 2031. The structure is 210 ft (64 m) long and 66 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesST 16 Eb/Wshgtn ST
CrossesComb I 90 & Csx/Mbta
LocationAt Int 16 S17
RouteInterstate 90
CountyMiddlesex County
StateMassachusetts
Coordinates42.34783, -71.22892
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 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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.2 US tons
Inventory rating42.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length210 ft (64 m)
Longest span55 ft (16.8 m)
Deck width66 ft (20.2 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,600 (2024)
Projected traffic21,478 by 2031
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed3.7 mi (6 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$12.8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 16 Eb/Wshgtn ST over Comb I 90 & Csx/Mbta built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1996.

What condition is ST 16 Eb/Wshgtn 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 ST 16 Eb/Wshgtn ST over Comb I 90 & Csx/Mbta carry?

About 17,600 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is ST 16 Eb/Wshgtn ST over Comb I 90 & Csx/Mbta?

The structure is 210 ft (64 m) long with a longest span of 55 ft (16.8 m) and a deck 66 ft wide.

Who owns ST 16 Eb/Wshgtn ST over Comb I 90 & Csx/Mbta?

It is owned by the State Highway Agency.