US Bridges

Moser Road over Cow Creek

FairPosted for load

Nez Perce County, Idaho · 1.5 S. 4.4 W. Genesee · Structure no. 000000000029915

Built
1970
55 years old
Condition
Fair
inspected May 2024
Type
Girder and Floorbeam System
Steel
Length
51 ft
1 main span
Daily traffic
30
2023 count
Owner
County
County Highway Agency

About this bridge

Moser Road over Cow Creek is a steel girder and floorbeam system carrying Moser Road over Cow Creek in Nez Perce County, Idaho. It was built in 1970, so it is 55 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 30 vehicles a day, roughly 10% of them trucks, projected to reach 45 by 2039. The structure is 51 ft (15.5 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesMoser Road
CrossesCow Creek
Location1.5 S. 4.4 W. Genesee
RouteCounty Highway 0
StateIdaho
Coordinates46.52842, -117.02314
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 protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32 US tons
Inventory rating19 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length51 ft (15.5 m)
Longest span50 ft (15.2 m)
Deck width28 ft (8.5 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2023)
Projected traffic45 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$541,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Moser Road over Cow Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is Moser Road over Cow 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 May 2024.

How much traffic does Moser Road over Cow Creek carry?

About 30 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Moser Road over Cow Creek?

The structure is 51 ft (15.5 m) long with a longest span of 50 ft (15.2 m) and a deck 28 ft wide.

Who owns Moser Road over Cow Creek?

It is owned by the County Highway Agency.