US Bridges

Main ST over Salmon Falls River

Fair

York County, Maine · Townline · Structure no. 5700

Built
1959
66 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
154 ft
2 main spans
Daily traffic
2,114
2016 count
Owner
State
State Highway Agency

About this bridge

Main ST over Salmon Falls River is a steel stringer/multi-beam or girder carrying Main ST over Salmon Falls River in York County, Maine. It was built in 1959, so it is 66 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 2,114 vehicles a day, roughly 5% of them trucks, projected to reach 2,960 by 2036. The structure is 154 ft (46.9 m) long and 35 ft wide. If it were closed, the detour would be 100 mi (161 km).

Location

Open in Google Maps
CarriesMain ST
CrossesSalmon Falls River
LocationTownline
RouteCounty Highway 0
CountyYork County
StateMaine
Coordinates43.23717, -70.81752
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 protection7 GoodSome minor problems.
Last inspectionOctober 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 rating48.6 US tons
Inventory rating37.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length154 ft (46.9 m)
Longest span75 ft (22.9 m)
Deck width35 ft (10.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,114 (2016)
Projected traffic2,960 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 Main ST over Salmon Falls River built?

It was built in 1959, making it 66 years old in 2025.

What condition is Main ST 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 October 2023.

How much traffic does Main ST over Salmon Falls River carry?

About 2,114 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Main ST over Salmon Falls River?

The structure is 154 ft (46.9 m) long with a longest span of 75 ft (22.9 m) and a deck 35 ft wide.

Who owns Main ST over Salmon Falls River?

It is owned by the State Highway Agency.