US Bridges

Olson Road over S.Fk.Palouse River

Fair

Latah County, Idaho · 0.8 N. 3.0 E. Moscow · Structure no. 000000000029710

Built
1970
55 years old
Condition
Fair
inspected June 2024
Type
Culvert
Steel
Length
23 ft
2 main spans
Daily traffic
30
2023 count
Owner
Local
Other Local Agency

About this bridge

Olson Road over S.Fk.Palouse River is a steel culvert carrying Olson Road over S.Fk.Palouse River in Latah County, Idaho. It was built in 1970, 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.

It carries about 30 vehicles a day, roughly 10% of them trucks, projected to reach 45 by 2039. The structure is 23 ft (7 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesOlson Road
CrossesS.Fk.Palouse River
Location0.8 N. 3.0 E. Moscow
RouteCounty Highway 0
CountyLatah County
StateIdaho
Coordinates46.74329, -116.93814
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width36 ft (11 m)
Roadway width36 ft (11 m)
Vertical clearance over deck30 ft (9.1 m)

Traffic and service

Average daily traffic30 (2023)
Projected traffic45 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Olson Road over S.Fk.Palouse River built?

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

What condition is Olson Road over S.Fk.Palouse River 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 June 2024.

How much traffic does Olson Road over S.Fk.Palouse River carry?

About 30 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Olson Road over S.Fk.Palouse River?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m) and a deck 36 ft wide.

Who owns Olson Road over S.Fk.Palouse River?

It is owned by the Other Local Agency.