US Bridges

Bridge ST over Mousam River

Fair

York County, Maine · 0.1 MI N RTE 11/109 · Structure no. 1358

Built
1901
124 years old
Condition
Fair
inspected July 2023
Type
Arch - Deck
Masonry
Length
64 ft
1 main span
Daily traffic
6,840
2016 count
Owner
State
State Highway Agency

About this bridge

Bridge ST over Mousam River is a masonry arch - deck carrying Bridge ST over Mousam River in York County, Maine. It was built in 1901, so it is 124 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 6,840 vehicles a day, roughly 5% of them trucks, projected to reach 9,576 by 2036. The structure is 64 ft (19.5 m) long and 59 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesBridge ST
CrossesMousam River
Location0.1 MI N RTE 11/109
RouteCounty Highway 224
CountyYork County
StateMaine
Coordinates43.46657, -70.7953
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
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating106.8 US tons
Inventory rating71.1 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckOther
Main spans1
Design loadUnknown
Structure length64 ft (19.5 m)
Longest span20 ft (6.1 m)
Deck width59 ft (18.1 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,840 (2016)
Projected traffic9,576 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Bridge ST over Mousam River built?

It was built in 1901, making it 124 years old in 2025.

What condition is Bridge 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 Bridge ST over Mousam River carry?

About 6,840 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Bridge ST over Mousam River?

The structure is 64 ft (19.5 m) long with a longest span of 20 ft (6.1 m) and a deck 59 ft wide.

Who owns Bridge ST over Mousam River?

It is owned by the State Highway Agency.