US Bridges

Rock Creek Road over Rock Creek; SE Potlatch

Fair

Latah County, Idaho · 1.2 S. 0.6 E. Potlatch · Structure no. 000000000029695

Built
1975
50 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
20 ft
1 main span
Daily traffic
340
2023 count
Owner
Local
Other Local Agency

About this bridge

Rock Creek Road over Rock Creek; SE Potlatch is a steel stringer/multi-beam or girder carrying Rock Creek Road over Rock Creek; SE Potlatch in Latah 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 5 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 340 vehicles a day, roughly 3% of them trucks, projected to reach 510 by 2042. The structure is 20 ft (6.1 m) long and 24 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesRock Creek Road
CrossesRock Creek; SE Potlatch
Location1.2 S. 0.6 E. Potlatch
RouteCounty Highway 0
CountyLatah County
StateIdaho
Coordinates46.90458, -116.88778
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating45 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 15
Structure length20 ft (6.1 m)
Longest span19 ft (5.8 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic340 (2023)
Projected traffic510 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$312,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rock Creek Road over Rock Creek; SE Potlatch built?

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

What condition is Rock Creek Road over Rock Creek; SE Potlatch 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 May 2023.

How much traffic does Rock Creek Road over Rock Creek; SE Potlatch carry?

About 340 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Rock Creek Road over Rock Creek; SE Potlatch?

The structure is 20 ft (6.1 m) long with a longest span of 19 ft (5.8 m) and a deck 24 ft wide.

Who owns Rock Creek Road over Rock Creek; SE Potlatch?

It is owned by the Other Local Agency.