US Bridges

Stc 4751;CTTNWD CR over Coyote Creek

FairPosted for load

Nez Perce County, Idaho · 3.1 S. 3.0 E. Myrtle · Structure no. 000000000029905

Built
1938
87 years old, rebuilt 1968
Condition
Fair
inspected September 2023
Type
Truss - Thru
Steel
Length
69 ft
1 main span
Daily traffic
40
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 4751;CTTNWD CR over Coyote Creek is a steel truss - thru carrying Stc 4751;CTTNWD CR over Coyote Creek in Nez Perce County, Idaho. It was built in 1938 and reconstructed in 1968, so it is 87 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. Its operating status is: posted for load restriction.

It carries about 40 vehicles a day, roughly 50% of them trucks, projected to reach 60 by 2042. The structure is 69 ft (21 m) long and 32 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

CarriesStc 4751;CTTNWD CR
CrossesCoyote Creek
Location3.1 S. 3.0 E. Myrtle
RouteCounty Highway 4751
StateIdaho
Coordinates46.45575, -116.65986
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 protection7 GoodSome minor problems.
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating22 US tons
Inventory rating13 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadH 15
Structure length69 ft (21 m)
Longest span65 ft (19.8 m)
Deck width32 ft (9.7 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2023)
Projected traffic60 by 2042
Trucks50%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 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$698,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 4751;CTTNWD CR over Coyote Creek built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1968.

What condition is Stc 4751;CTTNWD CR over Coyote 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 Stc 4751;CTTNWD CR over Coyote Creek carry?

About 40 vehicles per day (2023 count), of which roughly 50% are trucks.

How long is Stc 4751;CTTNWD CR over Coyote Creek?

The structure is 69 ft (21 m) long with a longest span of 65 ft (19.8 m) and a deck 32 ft wide.

Who owns Stc 4751;CTTNWD CR over Coyote Creek?

It is owned by the County Highway Agency.