US Bridges

Flint Road over Rock Creek

Fair

Power County, Idaho · 6.5 S. 1.5 E. Rockland · Structure no. 000000000023490

Built
1978
47 years old
Condition
Fair
inspected April 2023
Type
Tee Beam
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
95
2023 count
Owner
County
County Highway Agency

About this bridge

Flint Road over Rock Creek is a prestressed concrete tee beam carrying Flint Road over Rock Creek in Power County, Idaho. It was built in 1978, so it is 47 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 95 vehicles a day, roughly 10% of them trucks, projected to reach 143 by 2039. The structure is 30 ft (9.1 m) long and 24 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesFlint Road
CrossesRock Creek
Location6.5 S. 1.5 E. Rockland
RouteCounty Highway 0
CountyPower County
StateIdaho
Coordinates42.47986, -112.84753
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating61.9 US tons
Inventory rating35.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length30 ft (9.1 m)
Longest span28 ft (8.5 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic95 (2023)
Projected traffic143 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$270,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Flint Road over Rock Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is Flint 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 April 2023.

How much traffic does Flint Road over Rock Creek carry?

About 95 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Flint Road over Rock Creek?

The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.5 m) and a deck 24 ft wide.

Who owns Flint Road over Rock Creek?

It is owned by the County Highway Agency.