US Bridges

Steamboat Road over Steamboat Creek

Good

Idaho County, Idaho · Steamboat Ford Site · Structure no. 041204000003408

Built
2007
18 years old
Condition
Good
inspected September 2023
Type
Slab
Wood or Timber
Length
28 ft
1 main span
Daily traffic
5
Owner
Federal
U.S. Forest Service

About this bridge

Steamboat Road over Steamboat Creek is a wood or timber slab carrying Steamboat Road over Steamboat Creek in Idaho County, Idaho. It was built in 2007, so it is 18 years old, younger 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 5 vehicles a day, projected to reach 7 by 2045. The structure is 28 ft (8.5 m) long and 16 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

CarriesSteamboat Road
CrossesSteamboat Creek
LocationSteamboat Ford Site
RouteFederal Lands Road 50370
StateIdaho
Coordinates45.26152, -115.719
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating80.7 US tons
Inventory rating62.2 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 20
Structure length28 ft (8.5 m)
Longest span27 ft (8.2 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (—)
Projected traffic7 by 2045
Trucks—
Lanes on structure2
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 Steamboat Road over Steamboat Creek built?

It was built in 2007, making it 18 years old in 2025.

What condition is Steamboat Road over Steamboat 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 September 2023.

How much traffic does Steamboat Road over Steamboat Creek carry?

About 5 vehicles per day (latest count).

How long is Steamboat Road over Steamboat Creek?

The structure is 28 ft (8.5 m) long with a longest span of 27 ft (8.2 m) and a deck 16 ft wide.

Who owns Steamboat Road over Steamboat Creek?

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