US Bridges

Fort ST over Prestile Stream

Fair

Aroostook County, Maine · 0.2 MI NE of JCT US1 · Structure no. 2686

Built
1955
70 years old, rebuilt 1995
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete
Length
92 ft
2 main spans
Daily traffic
3,950
2016 count
Owner
State
State Highway Agency

About this bridge

Fort ST over Prestile Stream is a concrete tee beam carrying Fort ST over Prestile Stream in Aroostook County, Maine. It was built in 1955 and reconstructed in 1995, so it is 70 years old, older 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 3,950 vehicles a day, roughly 5% of them trucks, projected to reach 5,530 by 2036. The structure is 92 ft (27.9 m) long and 52 ft wide. If it were closed, the detour would be 41 mi (66 km).

Location

Open in Google Maps
CarriesFort ST
CrossesPrestile Stream
Location0.2 MI NE of JCT US1
RouteState Highway 1
CountyAroostook County
StateMaine
Coordinates46.518, -67.86622
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating29.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length92 ft (27.9 m)
Longest span44 ft (13.4 m)
Deck width52 ft (15.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,950 (2016)
Projected traffic5,530 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed41 mi (66 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Fort ST over Prestile Stream built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1995.

What condition is Fort ST over Prestile Stream 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 June 2024.

How much traffic does Fort ST over Prestile Stream carry?

About 3,950 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Fort ST over Prestile Stream?

The structure is 92 ft (27.9 m) long with a longest span of 44 ft (13.4 m) and a deck 52 ft wide.

Who owns Fort ST over Prestile Stream?

It is owned by the State Highway Agency.