US Bridges

Idaho Road over S. Fork Rock Creek

Good

Benewah County, Idaho · 0.4 MI N of E Truax RD · Structure no. 000000000030033

Built
2020
5 years old
Condition
Good
inspected July 2023
Type
Girder and Floorbeam System
Steel
Length
42 ft
1 main span
Daily traffic
36
2023 count
Owner
County
County Highway Agency

About this bridge

Idaho Road over S. Fork Rock Creek is a steel girder and floorbeam system carrying Idaho Road over S. Fork Rock Creek in Benewah County, Idaho. It was built in 2020, so it is 5 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 36 vehicles a day, roughly 19% of them trucks, projected to reach 51 by 2042. The structure is 42 ft (12.8 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIdaho Road
CrossesS. Fork Rock Creek
Location0.4 MI N of E Truax RD
RouteCounty Highway 2002
CountyBenewah County
StateIdaho
Coordinates47.35236, -117.03978
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating52.1 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHL 93
Structure length42 ft (12.8 m)
Longest span41 ft (12.5 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36 (2023)
Projected traffic51 by 2042
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$519,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Idaho Road over S. Fork Rock Creek built?

It was built in 2020, making it 5 years old in 2025.

What condition is Idaho Road over S. Fork Rock 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 July 2023.

How much traffic does Idaho Road over S. Fork Rock Creek carry?

About 36 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is Idaho Road over S. Fork Rock Creek?

The structure is 42 ft (12.8 m) long with a longest span of 41 ft (12.5 m) and a deck 25 ft wide.

Who owns Idaho Road over S. Fork Rock Creek?

It is owned by the County Highway Agency.