US Bridges

Bridge ST over Saint John River

Fair

Aroostook County, Maine · 0.15 MI NE of JCT US1 · Structure no. 2400

Built
1972
53 years old, rebuilt 2018
Condition
Fair
inspected December 2023
Type
Box Beam or Girders - Multiple
Steel Continuous
Length
732 ft
5 main spans
Daily traffic
330
2016 count
Owner
State
State Highway Agency

About this bridge

Bridge ST over Saint John River is a steel continuous box beam or girders - multiple carrying Bridge ST over Saint John River in Aroostook County, Maine. It was built in 1972 and reconstructed in 2018, so it is 53 years old, younger than the Maine average of 53.7 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 330 vehicles a day, roughly 5% of them trucks, projected to reach 528 by 2036. The structure is 732 ft (223 m) long and 37 ft wide. If it were closed, the detour would be 100 mi (161 km).

Location

Open in Google Maps
CarriesBridge ST
CrossesSaint John River
Location0.15 MI NE of JCT US1
RouteState Highway 0
CountyAroostook County
StateMaine
Coordinates47.15959, -67.93092
Functional classRural 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.5 US tons
Inventory rating27.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length732 ft (223 m)
Longest span190 ft (57.9 m)
Deck width37 ft (11.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic330 (2016)
Projected traffic528 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed100 mi (161 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Bridge ST over Saint John River built?

It was built in 1972, making it 53 years old in 2025. It was reconstructed in 2018.

What condition is Bridge ST over Saint John River 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 December 2023.

How much traffic does Bridge ST over Saint John River carry?

About 330 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Bridge ST over Saint John River?

The structure is 732 ft (223 m) long with a longest span of 190 ft (57.9 m) and a deck 37 ft wide.

Who owns Bridge ST over Saint John River?

It is owned by the State Highway Agency.