US Bridges

Route 109 over Salmon Falls River

Fair

York County, Maine · Me. - N.H. Border · Structure no. 3959

Built
1957
68 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete
Length
28 ft
1 main span
Daily traffic
730
2016 count
Owner
State
State Highway Agency

About this bridge

Route 109 over Salmon Falls River is a concrete slab carrying Route 109 over Salmon Falls River in York County, Maine. It was built in 1957, so it is 68 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 730 vehicles a day, roughly 5% of them trucks, projected to reach 1,168 by 2036. The structure is 28 ft (8.6 m) long and 30 ft wide. If it were closed, the detour would be 100 mi (161 km).

CarriesRoute 109
CrossesSalmon Falls River
LocationMe. - N.H. Border
RouteState Highway 109
StateMaine
Coordinates43.55226, -70.95166
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.
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 inspectionJuly 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 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 rating66.5 US tons
Inventory rating51.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length28 ft (8.6 m)
Longest span26 ft (7.8 m)
Deck width30 ft (9.2 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic730 (2016)
Projected traffic1,168 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed100 mi (161 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 Route 109 over Salmon Falls River built?

It was built in 1957, making it 68 years old in 2025.

What condition is Route 109 over Salmon Falls 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 Route 109 over Salmon Falls River carry?

About 730 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Route 109 over Salmon Falls River?

The structure is 28 ft (8.6 m) long with a longest span of 26 ft (7.8 m) and a deck 30 ft wide.

Who owns Route 109 over Salmon Falls River?

It is owned by the State Highway Agency.