US Bridges

Forest Road 233 over Wildhorse Creek

GoodClosed to traffic

Idaho County, Idaho · Near Orogrande Summit · Structure no. 011705000000125

Built
1955
70 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
36 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Forest Road 233 over Wildhorse Creek is a wood or timber stringer/multi-beam or girder carrying Forest Road 233 over Wildhorse Creek in Idaho County, Idaho. It was built in 1955, so it is 70 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. Its operating status is: closed to all traffic.

It carries about 50 vehicles a day, projected to reach 75 by 2045. The structure is 36 ft (11 m) long and 15 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Location

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CarriesForest Road 233
CrossesWildhorse Creek
LocationNear Orogrande Summit
RouteFederal Lands Road 233
CountyIdaho County
StateIdaho
Coordinates45.63923, -115.63273
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 protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating22.2 US tons
Inventory rating17.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 25 or greater
Structure length36 ft (11 m)
Longest span35 ft (10.7 m)
Deck width15 ft (4.7 m)
Roadway width14 ft (4.3 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 closed98.2 mi (158 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 Forest Road 233 over Wildhorse Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is Forest Road 233 over Wildhorse 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 October 2023.

How much traffic does Forest Road 233 over Wildhorse Creek carry?

About 50 vehicles per day (latest count).

How long is Forest Road 233 over Wildhorse Creek?

The structure is 36 ft (11 m) long with a longest span of 35 ft (10.7 m) and a deck 15 ft wide.

Who owns Forest Road 233 over Wildhorse Creek?

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