US Bridges

Fs Route No. 300A over N.F. ST Joe River

FairPosted for load

Shoshone County, Idaho · 3.5 Miles from Avery Id · Structure no. 010402000001057

Built
1935
90 years old
Condition
Fair
inspected October 2024
Type
Truss - Thru
Steel
Length
144 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Fs Route No. 300A over N.F. ST Joe River is a steel truss - thru carrying Fs Route No. 300A over N.F. ST Joe River in Shoshone County, Idaho. It was built in 1935, so it is 90 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. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, projected to reach 75 by 2045. The structure is 144 ft (43.9 m) long and 13 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

Location

Open in Google Maps
CarriesFs Route No. 300A
CrossesN.F. ST Joe River
Location3.5 Miles from Avery Id
RouteFederal Lands Road 1997B
CountyShoshone County
StateIdaho
Coordinates47.30049, -115.77243
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 alignment6: Equal to present minimum criteria
Operating rating25.7 US tons
Inventory rating19.6 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+2 approach)
Design loadH 15
Structure length144 ft (43.9 m)
Longest span100 ft (30.6 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 No. 300A over N.F. ST Joe River built?

It was built in 1935, making it 90 years old in 2025.

What condition is Fs Route No. 300A over N.F. ST Joe 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 2024.

How much traffic does Fs Route No. 300A over N.F. ST Joe River carry?

About 50 vehicles per day (latest count).

How long is Fs Route No. 300A over N.F. ST Joe River?

The structure is 144 ft (43.9 m) long with a longest span of 100 ft (30.6 m) and a deck 13 ft wide.

Who owns Fs Route No. 300A over N.F. ST Joe River?

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