US Bridges

US 95B over Lapwai Creek

Fair

Lewis County, Idaho · Winchester Scl · Structure no. 000000000018548

Built
2002
23 years old
Condition
Fair
inspected February 2023
Type
Frame
Concrete
Length
22 ft
1 main span
Daily traffic
550
2023 count
Owner
State
State Highway Agency

About this bridge

US 95B over Lapwai Creek is a concrete frame carrying US 95B over Lapwai Creek in Lewis County, Idaho. It was built in 2002, so it is 23 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 550 vehicles a day, roughly 25% of them trucks, projected to reach 825 by 2042. The structure is 22 ft (6.7 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 95B
CrossesLapwai Creek
LocationWinchester Scl
RouteU.S. Route 95
StateIdaho
Coordinates46.23786, -116.61917
Functional classRural Major 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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99.9 US tons
Inventory rating61 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length22 ft (6.7 m)
Longest span22 ft (6.7 m)
Deck width40 ft (12.2 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic550 (2023)
Projected traffic825 by 2042
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 95B over Lapwai Creek built?

It was built in 2002, making it 23 years old in 2025.

What condition is US 95B over Lapwai 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 February 2023.

How much traffic does US 95B over Lapwai Creek carry?

About 550 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is US 95B over Lapwai Creek?

The structure is 22 ft (6.7 m) long with a longest span of 22 ft (6.7 m) and a deck 40 ft wide.

Who owns US 95B over Lapwai Creek?

It is owned by the State Highway Agency.