US Bridges

Entrance Road over Lapwai Creek

FairPosted for load

Nez Perce County, Idaho · 1.4 Miles Southeast of Jc · Structure no. 9370001P0000000

Built
1988
37 years old
Condition
Fair
inspected July 2024
Type
Truss - Thru
Wood or Timber
Length
65 ft
1 main span
Daily traffic
225
2019 count
Owner
Federal
National Park Service

About this bridge

Entrance Road over Lapwai Creek is a wood or timber truss - thru carrying Entrance Road over Lapwai Creek in Nez Perce County, Idaho. It was built in 1988, so it is 37 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. Its operating status is: posted for load restriction.

It carries about 225 vehicles a day, roughly 1% of them trucks, projected to reach 300 by 2039. The structure is 65 ft (19.8 m) long and 24 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesEntrance Road
CrossesLapwai Creek
Location1.4 Miles Southeast of Jc
RouteFederal Lands Road 10
CountyNez Perce County
StateIdaho
Coordinates46.4485, -116.81792
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39 US tons
Inventory rating27 US tons

Structure

Structure typeTruss - Thru
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 15
Structure length65 ft (19.8 m)
Longest span60 ft (18.3 m)
Deck width24 ft (7.3 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic225 (2019)
Projected traffic300 by 2039
Trucks1%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNational Park Service
Maintained byNational Park Service
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$45,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Entrance Road over Lapwai Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is Entrance Road 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 July 2024.

How much traffic does Entrance Road over Lapwai Creek carry?

About 225 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is Entrance Road over Lapwai Creek?

The structure is 65 ft (19.8 m) long with a longest span of 60 ft (18.3 m) and a deck 24 ft wide.

Who owns Entrance Road over Lapwai Creek?

It is owned by the National Park Service.