US Bridges

Fs Route 326 over Frazier Creek

FairPosted for load

Shoshone County, Idaho · 10 Miles from Avery Id · Structure no. 010402000000172

Built
1938
87 years old, rebuilt 2010
Condition
Fair
inspected July 2024
Type
Girder and Floorbeam System
Steel
Length
78 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Fs Route 326 over Frazier Creek is a steel girder and floorbeam system carrying Fs Route 326 over Frazier Creek in Shoshone County, Idaho. It was built in 1938 and reconstructed in 2010, so it is 87 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, projected to reach 75 by 2045. The structure is 78 ft (23.8 m) long and 13 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

CarriesFs Route 326
CrossesFrazier Creek
Location10 Miles from Avery Id
RouteFederal Lands Road 326
StateIdaho
Coordinates47.35873, -115.69714
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating20.7 US tons
Inventory rating16.1 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1 (+2 approach)
Design loadH 15
Structure length78 ft (23.8 m)
Longest span39 ft (11.8 m)
Deck width13 ft (4.1 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-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 326 over Frazier Creek built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 2010.

What condition is Fs Route 326 over Frazier Creek 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 2024.

How much traffic does Fs Route 326 over Frazier Creek carry?

About 50 vehicles per day (latest count).

How long is Fs Route 326 over Frazier Creek?

The structure is 78 ft (23.8 m) long with a longest span of 39 ft (11.8 m) and a deck 13 ft wide.

Who owns Fs Route 326 over Frazier Creek?

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