US Bridges

US 95 over S.Fk. Palouse River

Fair

Latah County, Idaho · At Moscow Scl · Structure no. 000000000018511

Built
2004
21 years old
Condition
Fair
inspected August 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
64 ft
1 main span
Daily traffic
7,500
2023 count
Owner
State
State Highway Agency

About this bridge

US 95 over S.Fk. Palouse River is a prestressed concrete stringer/multi-beam or girder carrying US 95 over S.Fk. Palouse River in Latah County, Idaho. It was built in 2004, so it is 21 years old, younger 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 7,500 vehicles a day, roughly 10% of them trucks, projected to reach 11,250 by 2042. The structure is 64 ft (19.5 m) long and 82 ft wide. If it were closed, the detour would be 31.7 mi (51 km).

CarriesUS 95
CrossesS.Fk. Palouse River
LocationAt Moscow Scl
RouteU.S. Route 95
StateIdaho
Coordinates46.71403, -117.00386
Functional classUrban Other Principal Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionAugust 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating40 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length64 ft (19.5 m)
Longest span64 ft (19.5 m)
Deck width82 ft (25.1 m)
Roadway width71 ft (21.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2023)
Projected traffic11,250 by 2042
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.7 mi (51 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway 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 US 95 over S.Fk. Palouse River built?

It was built in 2004, making it 21 years old in 2025.

What condition is US 95 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 August 2021.

How much traffic does US 95 over S.Fk. Palouse River carry?

About 7,500 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is US 95 over S.Fk. Palouse River?

The structure is 64 ft (19.5 m) long with a longest span of 64 ft (19.5 m) and a deck 82 ft wide.

Who owns US 95 over S.Fk. Palouse River?

It is owned by the State Highway Agency.