US Bridges

Fdr over Valley Creek

Good

Custer County, Idaho · North MP120.7 ST HWY 21 · Structure no. 041403000001087

Built
1986
39 years old
Condition
Good
inspected October 2021
Type
Slab
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
60
Owner
Federal
U.S. Forest Service

About this bridge

Fdr over Valley Creek is a prestressed concrete slab carrying Fdr over Valley Creek in Custer County, Idaho. It was built in 1986, so it is 39 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 60 vehicles a day, projected to reach 90 by 2045. The structure is 40 ft (12.2 m) long and 14 ft wide.

CarriesFdr
CrossesValley Creek
LocationNorth MP120.7 ST HWY 21
RouteFederal Lands Road 70304
StateIdaho
Coordinates44.32066, -115.06785
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation*: *
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating—
Inventory rating—

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckWood or timber
Main spans1
Design loadHL 93
Structure length40 ft (12.2 m)
Longest span40 ft (12.2 m)
Deck width14 ft (4.3 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (—)
Projected traffic90 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Fdr over Valley Creek built?

It was built in 1986, making it 39 years old in 2025.

What condition is Fdr over Valley 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 2021.

How much traffic does Fdr over Valley Creek carry?

About 60 vehicles per day (latest count).

How long is Fdr over Valley Creek?

The structure is 40 ft (12.2 m) long with a longest span of 40 ft (12.2 m) and a deck 14 ft wide.

Who owns Fdr over Valley Creek?

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