US Bridges

Rock Creek Road over Rock Creek

FairPosted for load

Washington County, Idaho · 13.0 N. 8.7 W. Weiser · Structure no. 000000000028940

Built
1970
55 years old, rebuilt 1995
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
29 ft
1 main span
Daily traffic
5
2023 count
Owner
County
County Highway Agency

About this bridge

Rock Creek Road over Rock Creek is a steel stringer/multi-beam or girder carrying Rock Creek Road over Rock Creek in Washington County, Idaho. It was built in 1970 and reconstructed in 1995, so it is 55 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. Its operating status is: posted for load restriction.

It carries about 5 vehicles a day, roughly 5% of them trucks, projected to reach 8 by 2039. The structure is 29 ft (8.8 m) long and 18 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

Location

Open in Google Maps
CarriesRock Creek Road
CrossesRock Creek
Location13.0 N. 8.7 W. Weiser
RouteCounty Highway 0
CountyWashington County
StateIdaho
Coordinates44.43214, -117.14617
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating18 US tons
Inventory rating11 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadH 15
Structure length29 ft (8.8 m)
Longest span28 ft (8.5 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2023)
Projected traffic8 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.8 mi (56 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$339,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rock Creek Road over Rock Creek built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1995.

What condition is Rock Creek Road over Rock 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 July 2024.

How much traffic does Rock Creek Road over Rock Creek carry?

About 5 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Rock Creek Road over Rock Creek?

The structure is 29 ft (8.8 m) long with a longest span of 28 ft (8.5 m) and a deck 18 ft wide.

Who owns Rock Creek Road over Rock Creek?

It is owned by the County Highway Agency.