US Bridges

I 93 /US1/ST3 over RR CSX Spur

Fair

Suffolk County, Massachusetts · 2 MI S of JCT I90&I93 · Structure no. B162603DNDOTNBI

Built
1958
67 years old, rebuilt 1984
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
81 ft
1 main span
Daily traffic
188,320
2022 count
Owner
State
State Highway Agency

About this bridge

I 93 /US1/ST3 over RR CSX Spur is a steel stringer/multi-beam or girder carrying I 93 /US1/ST3 over RR CSX Spur in Suffolk County, Massachusetts. It was built in 1958 and reconstructed in 1984, so it is 67 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 6 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 188,320 vehicles a day, roughly 6% of them trucks, projected to reach 308,911 by 2032. The structure is 81 ft (24.8 m) long and 111 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesI 93 /US1/ST3
CrossesRR CSX Spur
Location2 MI S of JCT I90&I93
RouteInterstate 93
CountySuffolk County
StateMassachusetts
Coordinates42.31639, -71.05126
Functional classUrban Principal Arterial - Interstate

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
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 alignment7: Better than present minimum criteria
Operating rating77.3 US tons
Inventory rating46.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length81 ft (24.8 m)
Longest span60 ft (18.2 m)
Deck width111 ft (33.9 m)
Roadway width105 ft (32 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic188,320 (2022)
Projected traffic308,911 by 2032
Trucks6%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.9 mi (3 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$2.9 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 93 /US1/ST3 over RR CSX Spur built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1984.

What condition is I 93 /US1/ST3 over RR CSX Spur 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 I 93 /US1/ST3 over RR CSX Spur carry?

About 188,320 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is I 93 /US1/ST3 over RR CSX Spur?

The structure is 81 ft (24.8 m) long with a longest span of 60 ft (18.2 m) and a deck 111 ft wide.

Who owns I 93 /US1/ST3 over RR CSX Spur?

It is owned by the State Highway Agency.