US Bridges

US 95 over Cottonwood Creek

Fair

Idaho County, Idaho · S. of Cottonwood Scl · Structure no. 000000000018369

Built
1978
47 years old
Condition
Fair
inspected February 2023
Type
Culvert
Steel
Length
27 ft
1 main span
Daily traffic
3,000
2023 count
Owner
State
State Highway Agency

About this bridge

US 95 over Cottonwood Creek is a steel culvert carrying US 95 over Cottonwood Creek in Idaho County, Idaho. It was built in 1978, so it is 47 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.

It carries about 3,000 vehicles a day, roughly 19% of them trucks, projected to reach 4,500 by 2042. The structure is 27 ft (8.2 m) long and 270 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesUS 95
CrossesCottonwood Creek
LocationS. of Cottonwood Scl
RouteU.S. Route 95
CountyIdaho County
StateIdaho
Coordinates46.04492, -116.34342
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating99.9 US tons
Inventory rating99.9 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length27 ft (8.2 m)
Longest span27 ft (8.2 m)
Deck width270 ft (82.3 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2023)
Projected traffic4,500 by 2042
Trucks19%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Cottonwood Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is US 95 over Cottonwood 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 February 2023.

How much traffic does US 95 over Cottonwood Creek carry?

About 3,000 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is US 95 over Cottonwood Creek?

The structure is 27 ft (8.2 m) long with a longest span of 27 ft (8.2 m) and a deck 270 ft wide.

Who owns US 95 over Cottonwood Creek?

It is owned by the State Highway Agency.