US Bridges

Main ST over Caribou Stream

Fair

Aroostook County, Maine · 0.4 MI N JCT 161 & 164 · Structure no. 2333

Built
1922
103 years old, rebuilt 1996
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete
Length
28 ft
1 main span
Daily traffic
7,670
2016 count
Owner
State
State Highway Agency

About this bridge

Main ST over Caribou Stream is a concrete tee beam carrying Main ST over Caribou Stream in Aroostook County, Maine. It was built in 1922 and reconstructed in 1996, so it is 103 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 7,670 vehicles a day, roughly 5% of them trucks, projected to reach 10,738 by 2036. The structure is 28 ft (8.5 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMain ST
CrossesCaribou Stream
Location0.4 MI N JCT 161 & 164
RouteCounty Highway 161
CountyAroostook County
StateMaine
Coordinates46.85932, -68.01131
Functional classUrban Collector

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.
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80 US tons
Inventory rating61.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length28 ft (8.5 m)
Longest span24 ft (7.3 m)
Deck width46 ft (14 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,670 (2016)
Projected traffic10,738 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Main ST over Caribou Stream built?

It was built in 1922, making it 103 years old in 2025. It was reconstructed in 1996.

What condition is Main ST over Caribou 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 Main ST over Caribou Stream carry?

About 7,670 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Main ST over Caribou Stream?

The structure is 28 ft (8.5 m) long with a longest span of 24 ft (7.3 m) and a deck 46 ft wide.

Who owns Main ST over Caribou Stream?

It is owned by the State Highway Agency.