US Bridges

Prospect Hill RD over Salmon Falls

Fair

York County, Maine · 50 E of N. H. RTE 125 · Structure no. 5162

Built
2004
21 years old
Condition
Fair
inspected December 2024
Type
Slab
Prestressed Concrete
Length
101 ft
2 main spans
Daily traffic
1,420
2016 count
Owner
State
State Highway Agency

About this bridge

Prospect Hill RD over Salmon Falls is a prestressed concrete slab carrying Prospect Hill RD over Salmon Falls in York County, Maine. It was built in 2004, so it is 21 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 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 1,420 vehicles a day, roughly 5% of them trucks, projected to reach 2,130 by 2036. The structure is 101 ft (30.9 m) long and 26 ft wide. If it were closed, the detour would be 100 mi (161 km).

Location

Open in Google Maps
CarriesProspect Hill RD
CrossesSalmon Falls
Location50 E of N. H. RTE 125
RouteCity Street 0
CountyYork County
StateMaine
Coordinates43.41338, -70.98698
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
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 inspectionDecember 2024
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 rating48.2 US tons
Inventory rating37.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadGreater than HL 93
Structure length101 ft (30.9 m)
Longest span40 ft (12.2 m)
Deck width26 ft (7.9 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,420 (2016)
Projected traffic2,130 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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Prospect Hill RD over Salmon Falls built?

It was built in 2004, making it 21 years old in 2025.

What condition is Prospect Hill RD over Salmon Falls 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 December 2024.

How much traffic does Prospect Hill RD over Salmon Falls carry?

About 1,420 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Prospect Hill RD over Salmon Falls?

The structure is 101 ft (30.9 m) long with a longest span of 40 ft (12.2 m) and a deck 26 ft wide.

Who owns Prospect Hill RD over Salmon Falls?

It is owned by the State Highway Agency.