US Bridges

SH 7 over N.Fk. Clearwater River

Fair

Clearwater County, Idaho · At Ahsahka · Structure no. 000000000010211

Built
1999
26 years old
Condition
Fair
inspected October 2021
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
516 ft
3 main spans
Daily traffic
2,100
2023 count
Owner
State
State Highway Agency

About this bridge

SH 7 over N.Fk. Clearwater River is a steel continuous stringer/multi-beam or girder carrying SH 7 over N.Fk. Clearwater River in Clearwater County, Idaho. It was built in 1999, so it is 26 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.

It carries about 2,100 vehicles a day, roughly 5% of them trucks, projected to reach 3,150 by 2042. The structure is 516 ft (157.3 m) long and 34 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesSH 7
CrossesN.Fk. Clearwater River
LocationAt Ahsahka
RouteState Highway 7
CountyClearwater County
StateIdaho
Coordinates46.50319, -116.32094
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78 US tons
Inventory rating46 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length516 ft (157.3 m)
Longest span242 ft (73.8 m)
Deck width34 ft (10.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,100 (2023)
Projected traffic3,150 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SH 7 over N.Fk. Clearwater River built?

It was built in 1999, making it 26 years old in 2025.

What condition is SH 7 over N.Fk. Clearwater River 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 October 2021.

How much traffic does SH 7 over N.Fk. Clearwater River carry?

About 2,100 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is SH 7 over N.Fk. Clearwater River?

The structure is 516 ft (157.3 m) long with a longest span of 242 ft (73.8 m) and a deck 34 ft wide.

Who owns SH 7 over N.Fk. Clearwater River?

It is owned by the State Highway Agency.