US Bridges

Gold Dust Road over Big Creek

Fair

Valley County, Idaho · 2.3 S. 3.0 E. Cascade · Structure no. 000000000028610

Built
1975
50 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Prestressed Concrete
Length
46 ft
1 main span
Daily traffic
70
2023 count
Owner
County
County Highway Agency

About this bridge

Gold Dust Road over Big Creek is a prestressed concrete tee beam carrying Gold Dust Road over Big Creek in Valley County, Idaho. It was built in 1975, so it is 50 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 70 vehicles a day, roughly 10% of them trucks, projected to reach 105 by 2039. The structure is 46 ft (14 m) long and 27 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesGold Dust Road
CrossesBig Creek
Location2.3 S. 3.0 E. Cascade
RouteCounty Highway 0
CountyValley County
StateIdaho
Coordinates44.47931, -115.97506
Functional classRural Minor Collector

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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length46 ft (14 m)
Longest span44 ft (13.4 m)
Deck width27 ft (8.3 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (2023)
Projected traffic105 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$513,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Gold Dust Road over Big Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Gold Dust Road over Big 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 August 2024.

How much traffic does Gold Dust Road over Big Creek carry?

About 70 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Gold Dust Road over Big Creek?

The structure is 46 ft (14 m) long with a longest span of 44 ft (13.4 m) and a deck 27 ft wide.

Who owns Gold Dust Road over Big Creek?

It is owned by the County Highway Agency.