US Bridges

Fs Route No. 412 over Shoshone Creek

Good

Shoshone County, Idaho · 9 MI from Shoshone W.C. · Structure no. 010401000000065

Built
1977
48 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
78 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Fs Route No. 412 over Shoshone Creek is a prestressed concrete stringer/multi-beam or girder carrying Fs Route No. 412 over Shoshone Creek in Shoshone County, Idaho. It was built in 1977, so it is 48 years old, older than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 50 vehicles a day, projected to reach 75 by 2045. The structure is 78 ft (23.8 m) long and 31 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

CarriesFs Route No. 412
CrossesShoshone Creek
Location9 MI from Shoshone W.C.
RouteFederal Lands Road 412
StateIdaho
Coordinates47.81914, -115.9722
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.1 US tons
Inventory rating35.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length78 ft (23.8 m)
Longest span76 ft (23.2 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed620.7 mi (999 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Fs Route No. 412 over Shoshone Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is Fs Route No. 412 over Shoshone Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does Fs Route No. 412 over Shoshone Creek carry?

About 50 vehicles per day (latest count).

How long is Fs Route No. 412 over Shoshone Creek?

The structure is 78 ft (23.8 m) long with a longest span of 76 ft (23.2 m) and a deck 31 ft wide.

Who owns Fs Route No. 412 over Shoshone Creek?

It is owned by the U.S. Forest Service.