US Bridges

Squaw Creek RD over Squaw Creek

Poor

Custer County, Idaho · 2.9 N. 3.5 W. Clayton · Structure no. 000000000031740

Built
1960
65 years old, rebuilt 1984
Condition
Poor
inspected July 2024
Type
Tee Beam
Prestressed Concrete
Length
24 ft
1 main span
Daily traffic
330
2023 count
Owner
County
County Highway Agency

About this bridge

Squaw Creek RD over Squaw Creek is a prestressed concrete tee beam carrying Squaw Creek RD over Squaw Creek in Custer County, Idaho. It was built in 1960 and reconstructed in 1984, so it is 65 years old, older than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 330 vehicles a day, roughly 10% of them trucks, projected to reach 495 by 2039. The structure is 24 ft (7.3 m) long and 28 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesSquaw Creek RD
CrossesSquaw Creek
Location2.9 N. 3.5 W. Clayton
RouteCounty Highway 0
StateIdaho
Coordinates44.30108, -114.47711
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating42 US tons
Inventory rating25 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span23 ft (7 m)
Deck width28 ft (8.5 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic330 (2023)
Projected traffic495 by 2039
Trucks10%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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$223,000 (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Squaw Creek RD over Squaw Creek built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1984.

What condition is Squaw Creek RD over Squaw Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does Squaw Creek RD over Squaw Creek carry?

About 330 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Squaw Creek RD over Squaw Creek?

The structure is 24 ft (7.3 m) long with a longest span of 23 ft (7 m) and a deck 28 ft wide.

Who owns Squaw Creek RD over Squaw Creek?

It is owned by the County Highway Agency.