US Bridges

River Road over Pine Creek

FairPosted for load

Nez Perce County, Idaho · 1.7 N. 3.6 E. Myrtle · Structure no. 000000000029920

Built
1929
96 years old, rebuilt 1968
Condition
Fair
inspected September 2023
Type
Truss - Thru
Steel
Length
40 ft
1 main span
Daily traffic
30
2023 count
Owner
County
County Highway Agency

About this bridge

River Road over Pine Creek is a steel truss - thru carrying River Road over Pine Creek in Nez Perce County, Idaho. It was built in 1929 and reconstructed in 1968, so it is 96 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 5 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 30 vehicles a day, roughly 5% of them trucks, projected to reach 45 by 2039. The structure is 40 ft (12.2 m) long and 16 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesRiver Road
CrossesPine Creek
Location1.7 N. 3.6 E. Myrtle
RouteCounty Highway 0
CountyNez Perce County
StateIdaho
Coordinates46.52636, -116.64622
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating24 US tons
Inventory rating14 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadH 15
Structure length40 ft (12.2 m)
Longest span39 ft (11.9 m)
Deck width16 ft (5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2023)
Projected traffic45 by 2039
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$444,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was River Road over Pine Creek built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1968.

What condition is River Road over Pine 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 September 2023.

How much traffic does River Road over Pine Creek carry?

About 30 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is River Road over Pine Creek?

The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.9 m) and a deck 16 ft wide.

Who owns River Road over Pine Creek?

It is owned by the County Highway Agency.