US Bridges

Main ST over Mousam River

Fair

York County, Maine · .1 MI So Townline · Structure no. 3636

Built
1952
73 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete
Length
35 ft
1 main span
Daily traffic
6,320
2016 count
Owner
State
State Highway Agency

About this bridge

Main ST over Mousam River is a concrete slab carrying Main ST over Mousam River in York County, Maine. It was built in 1952, so it is 73 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 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 6,320 vehicles a day, roughly 5% of them trucks, projected to reach 8,848 by 2036. The structure is 35 ft (10.6 m) long and 35 ft wide. If it were closed, the detour would be 39.1 mi (63 km).

Location

Open in Google Maps
CarriesMain ST
CrossesMousam River
Location.1 MI So Townline
RouteCounty Highway 11
CountyYork County
StateMaine
Coordinates43.48605, -70.8263
Functional classRural Major 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating91.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length35 ft (10.6 m)
Longest span30 ft (9.1 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,320 (2016)
Projected traffic8,848 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.1 mi (63 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 Mousam River built?

It was built in 1952, making it 73 years old in 2025.

What condition is Main ST over Mousam 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 April 2024.

How much traffic does Main ST over Mousam River carry?

About 6,320 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Main ST over Mousam River?

The structure is 35 ft (10.6 m) long with a longest span of 30 ft (9.1 m) and a deck 35 ft wide.

Who owns Main ST over Mousam River?

It is owned by the State Highway Agency.