US Bridges

Rock Creek Road over Palouse R;se.Potlatch Br

Fair

Latah County, Idaho · 0.4 S. 0.1 E. Potlatch · Structure no. 000000000029535

Built
1965
60 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
193 ft
3 main spans
Daily traffic
580
2023 count
Owner
Local
Other Local Agency

About this bridge

Rock Creek Road over Palouse R;se.Potlatch Br is a prestressed concrete stringer/multi-beam or girder carrying Rock Creek Road over Palouse R;se.Potlatch Br in Latah County, Idaho. It was built in 1965, so it is 60 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 580 vehicles a day, roughly 7% of them trucks, projected to reach 870 by 2042. The structure is 193 ft (58.8 m) long and 26 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesRock Creek Road
CrossesPalouse R;se.Potlatch Br
Location0.4 S. 0.1 E. Potlatch
RouteCounty Highway 0
CountyLatah County
StateIdaho
Coordinates46.91614, -116.89619
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating45 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length193 ft (58.8 m)
Longest span63 ft (19.2 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic580 (2023)
Projected traffic870 by 2042
Trucks7%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Rock Creek Road over Palouse R;se.Potlatch Br built?

It was built in 1965, making it 60 years old in 2025.

What condition is Rock Creek Road over Palouse R;se.Potlatch Br 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 2023.

How much traffic does Rock Creek Road over Palouse R;se.Potlatch Br carry?

About 580 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Rock Creek Road over Palouse R;se.Potlatch Br?

The structure is 193 ft (58.8 m) long with a longest span of 63 ft (19.2 m) and a deck 26 ft wide.

Who owns Rock Creek Road over Palouse R;se.Potlatch Br?

It is owned by the Other Local Agency.