US Bridges

Stibnite Road over E.Fk. of S.Fk.Salmon Rvr

Fair

Valley County, Idaho · 1.5 E. Yellow Pine · Structure no. 000000000033900

Built
1959
66 years old
Condition
Fair
inspected August 2021
Type
Stringer/Multi-beam or Girder
Concrete Continuous
Length
96 ft
3 main spans
Daily traffic
30
2023 count
Owner
County
County Highway Agency

About this bridge

Stibnite Road over E.Fk. of S.Fk.Salmon Rvr is a concrete continuous stringer/multi-beam or girder carrying Stibnite Road over E.Fk. of S.Fk.Salmon Rvr in Valley County, Idaho. It was built in 1959, so it is 66 years old, older than the Idaho average of 45.3 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 30 vehicles a day, roughly 50% of them trucks, projected to reach 45 by 2042. The structure is 96 ft (29.3 m) long and 18 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesStibnite Road
CrossesE.Fk. of S.Fk.Salmon Rvr
Location1.5 E. Yellow Pine
RouteCounty Highway 0
CountyValley County
StateIdaho
Coordinates44.96264, -115.46028
Functional classRural Minor 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length96 ft (29.3 m)
Longest span60 ft (18.3 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2023)
Projected traffic45 by 2042
Trucks50%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Stibnite Road over E.Fk. of S.Fk.Salmon Rvr built?

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

What condition is Stibnite Road over E.Fk. of S.Fk.Salmon Rvr 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 August 2021.

How much traffic does Stibnite Road over E.Fk. of S.Fk.Salmon Rvr carry?

About 30 vehicles per day (2023 count), of which roughly 50% are trucks.

How long is Stibnite Road over E.Fk. of S.Fk.Salmon Rvr?

The structure is 96 ft (29.3 m) long with a longest span of 60 ft (18.3 m) and a deck 18 ft wide.

Who owns Stibnite Road over E.Fk. of S.Fk.Salmon Rvr?

It is owned by the County Highway Agency.