US Bridges

HWY ST James ST over Comb I 90 & Csx/Mbta

Fair

Middlesex County, Massachusetts · At Int 17 S33 · Structure no. N120134RADOTNBI

Built
1964
61 years old, rebuilt 1993
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
277 ft
4 main spans
Daily traffic
12,802
2024 count
Owner
State
State Highway Agency

About this bridge

HWY ST James ST over Comb I 90 & Csx/Mbta is a steel stringer/multi-beam or girder carrying HWY ST James ST over Comb I 90 & Csx/Mbta in Middlesex County, Massachusetts. It was built in 1964 and reconstructed in 1993, 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 12,802 vehicles a day, roughly 5% of them trucks, projected to reach 1,106 by 2032. The structure is 277 ft (84.4 m) long and 42 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesHWY ST James ST
CrossesComb I 90 & Csx/Mbta
LocationAt Int 17 S33
RouteInterstate 90
CountyMiddlesex County
StateMassachusetts
Coordinates42.35743, -71.18113
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64 US tons
Inventory rating38.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length277 ft (84.4 m)
Longest span69 ft (21 m)
Deck width42 ft (12.9 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,802 (2024)
Projected traffic1,106 by 2032
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$18.3 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

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

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1993.

What condition is HWY ST James 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 ST James ST over Comb I 90 & Csx/Mbta carry?

About 12,802 vehicles per day (2024 count), of which roughly 5% are trucks.

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

The structure is 277 ft (84.4 m) long with a longest span of 69 ft (21 m) and a deck 42 ft wide.

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

It is owned by the State Highway Agency.