US Bridges

River ST over Mousam River

Fair

York County, Maine · 1 MI S JCT 224 · Structure no. 1349

Built
1978
47 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
42 ft
1 main span
Daily traffic
6,030
2016 count
Owner
State
State Highway Agency

About this bridge

River ST over Mousam River is a steel stringer/multi-beam or girder carrying River ST over Mousam River in York County, Maine. It was built in 1978, so it is 47 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 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 6,030 vehicles a day, roughly 5% of them trucks, projected to reach 8,442 by 2036. The structure is 42 ft (12.7 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesRiver ST
CrossesMousam River
Location1 MI S JCT 224
RouteCounty Highway 0
StateMaine
Coordinates43.45042, -70.77784
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.1 US tons
Inventory rating40 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length42 ft (12.7 m)
Longest span38 ft (11.6 m)
Deck width56 ft (17.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,030 (2016)
Projected traffic8,442 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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was River ST over Mousam River built?

It was built in 1978, making it 47 years old in 2025.

What condition is River 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 July 2023.

How much traffic does River ST over Mousam River carry?

About 6,030 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is River ST over Mousam River?

The structure is 42 ft (12.7 m) long with a longest span of 38 ft (11.6 m) and a deck 56 ft wide.

Who owns River ST over Mousam River?

It is owned by the State Highway Agency.