US Bridges

US 95 over Skookumchuck Creek

Fair

Idaho County, Idaho · 4.6 S. Whitebird · Structure no. 000000000018360

Built
1971
54 years old
Condition
Fair
inspected February 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
70 ft
1 main span
Daily traffic
2,200
2023 count
Owner
State
State Highway Agency

About this bridge

US 95 over Skookumchuck Creek is a prestressed concrete stringer/multi-beam or girder carrying US 95 over Skookumchuck Creek in Idaho County, Idaho. It was built in 1971, so it is 54 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 2,200 vehicles a day, roughly 63% of them trucks, projected to reach 3,300 by 2042. The structure is 70 ft (21.3 m) long and 40 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesUS 95
CrossesSkookumchuck Creek
Location4.6 S. Whitebird
RouteU.S. Route 95
CountyIdaho County
StateIdaho
Coordinates45.69981, -116.31614
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2022
Inspection intervalevery 48 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 rating87 US tons
Inventory rating53 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span68 ft (20.8 m)
Deck width40 ft (12.1 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,200 (2023)
Projected traffic3,300 by 2042
Trucks63%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1 million (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 95 over Skookumchuck Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is US 95 over Skookumchuck 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 2022.

How much traffic does US 95 over Skookumchuck Creek carry?

About 2,200 vehicles per day (2023 count), of which roughly 63% are trucks.

How long is US 95 over Skookumchuck Creek?

The structure is 70 ft (21.3 m) long with a longest span of 68 ft (20.8 m) and a deck 40 ft wide.

Who owns US 95 over Skookumchuck Creek?

It is owned by the State Highway Agency.