US Bridges

US 95 over Lapwai Creek

Good

Lewis County, Idaho · 2.9 N. 1.3 E. Winchester · Structure no. 000000000033146

Built
2020
5 years old
Condition
Good
inspected November 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
36 ft
1 main span
Daily traffic
3,600
2023 count
Owner
State
State Highway Agency

About this bridge

US 95 over Lapwai Creek is a prestressed concrete box beam or girders - multiple carrying US 95 over Lapwai Creek in Lewis County, Idaho. It was built in 2020, so it is 5 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,600 vehicles a day, roughly 21% of them trucks, projected to reach 5,400 by 2042. The structure is 36 ft (11 m) long and 81 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesUS 95
CrossesLapwai Creek
Location2.9 N. 1.3 E. Winchester
RouteU.S. Route 95
CountyLewis County
StateIdaho
Coordinates46.28528, -116.59444
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating79.7 US tons
Inventory rating55 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length36 ft (11 m)
Longest span34 ft (10.4 m)
Deck width81 ft (24.8 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic3,600 (2023)
Projected traffic5,400 by 2042
Trucks21%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 2020, making it 5 years old in 2025.

What condition is US 95 over Lapwai Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.

How much traffic does US 95 over Lapwai Creek carry?

About 3,600 vehicles per day (2023 count), of which roughly 21% are trucks.

How long is US 95 over Lapwai Creek?

The structure is 36 ft (11 m) long with a longest span of 34 ft (10.4 m) and a deck 81 ft wide.

Who owns US 95 over Lapwai Creek?

It is owned by the State Highway Agency.