US Bridges

US 95 over Lapwai Creek

Fair

Nez Perce County, Idaho · 1 N. Lapwai · Structure no. 000000000018455

Built
1964
61 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
74 ft
1 main span
Daily traffic
7,000
2023 count
Owner
State
State Highway Agency

About this bridge

US 95 over Lapwai Creek is a prestressed concrete stringer/multi-beam or girder carrying US 95 over Lapwai Creek in Nez Perce County, Idaho. It was built in 1964, so it is 61 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 7,000 vehicles a day, roughly 13% of them trucks, projected to reach 10,500 by 2042. The structure is 74 ft (22.6 m) long and 42 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS 95
CrossesLapwai Creek
Location1 N. Lapwai
RouteU.S. Route 95
StateIdaho
Coordinates46.42356, -116.80397
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73 US tons
Inventory rating44 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length74 ft (22.6 m)
Longest span69 ft (21 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,000 (2023)
Projected traffic10,500 by 2042
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Lapwai Creek built?

It was built in 1964, making it 61 years old in 2025.

What condition is US 95 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 November 2023.

How much traffic does US 95 over Lapwai Creek carry?

About 7,000 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is US 95 over Lapwai Creek?

The structure is 74 ft (22.6 m) long with a longest span of 69 ft (21 m) and a deck 42 ft wide.

Who owns US 95 over Lapwai Creek?

It is owned by the State Highway Agency.