US Bridges

W Main ST over Sebec River

Fair

Piscataquis County, Maine · 600 Ft SW of JCT RTE 11 · Structure no. 2931

Built
1924
101 years old, rebuilt 1995
Condition
Fair
inspected September 2023
Type
Slab
Concrete
Length
26 ft
1 main span
Daily traffic
6,037
2016 count
Owner
State
State Highway Agency

About this bridge

W Main ST over Sebec River is a concrete slab carrying W Main ST over Sebec River in Piscataquis County, Maine. It was built in 1924 and reconstructed in 1995, so it is 101 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 6,037 vehicles a day, roughly 5% of them trucks, projected to reach 8,452 by 2036. The structure is 26 ft (7.9 m) long and 38 ft wide. If it were closed, the detour would be 49.1 mi (79 km).

Location

Open in Google Maps
CarriesW Main ST
CrossesSebec River
Location600 Ft SW of JCT RTE 11
RouteState Highway 6
CountyPiscataquis County
StateMaine
Coordinates45.25099, -68.98769
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 inspectionSeptember 2023
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 rating90.4 US tons
Inventory rating70 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length26 ft (7.9 m)
Longest span21 ft (6.4 m)
Deck width38 ft (11.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,037 (2016)
Projected traffic8,452 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed49.1 mi (79 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 W Main ST over Sebec River built?

It was built in 1924, making it 101 years old in 2025. It was reconstructed in 1995.

What condition is W Main ST over Sebec 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 September 2023.

How much traffic does W Main ST over Sebec River carry?

About 6,037 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is W Main ST over Sebec River?

The structure is 26 ft (7.9 m) long with a longest span of 21 ft (6.4 m) and a deck 38 ft wide.

Who owns W Main ST over Sebec River?

It is owned by the State Highway Agency.