US Bridges

Beaver Creek Road over Marsh Creek

Fair

Custer County, Idaho · Crosses Marsh Creek · Structure no. 040601000001105

Built
1964
61 years old, rebuilt 1999
Condition
Fair
inspected October 2023
Type
Girder and Floorbeam System
Steel
Length
51 ft
1 main span
Daily traffic
50
1994 count
Owner
Federal
U.S. Forest Service

About this bridge

Beaver Creek Road over Marsh Creek is a steel girder and floorbeam system carrying Beaver Creek Road over Marsh Creek in Custer County, Idaho. It was built in 1964 and reconstructed in 1999, so it is 61 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.

It carries about 50 vehicles a day, projected to reach 125 by 2015. The structure is 51 ft (15.4 m) long and 16 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

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CarriesBeaver Creek Road
CrossesMarsh Creek
LocationCrosses Marsh Creek
RouteFederal Lands Road 40008
CountyCuster County
StateIdaho
Coordinates44.39603, -115.16919
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39 US tons
Inventory rating25 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckWood or timber
Main spans1
Design loadH 20
Structure length51 ft (15.4 m)
Longest span49 ft (14.9 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (1994)
Projected traffic125 by 2015
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Beaver Creek Road over Marsh Creek built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1999.

What condition is Beaver Creek Road over Marsh 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 October 2023.

How much traffic does Beaver Creek Road over Marsh Creek carry?

About 50 vehicles per day (1994 count).

How long is Beaver Creek Road over Marsh Creek?

The structure is 51 ft (15.4 m) long with a longest span of 49 ft (14.9 m) and a deck 16 ft wide.

Who owns Beaver Creek Road over Marsh Creek?

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