US Bridges

US 93 over Garden Creek

Fair

Custer County, Idaho · At Challis · Structure no. 000000000017840

Built
1941
84 years old
Condition
Fair
inspected October 2024
Type
Frame
Concrete
Length
21 ft
1 main span
Daily traffic
2,300
2023 count
Owner
State
State Highway Agency

About this bridge

US 93 over Garden Creek is a concrete frame carrying US 93 over Garden Creek in Custer County, Idaho. It was built in 1941, so it is 84 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 2,300 vehicles a day, roughly 7% of them trucks, projected to reach 3,450 by 2042. The structure is 21 ft (6.4 m) long and 45 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesUS 93
CrossesGarden Creek
LocationAt Challis
RouteU.S. Route 93
CountyCuster County
StateIdaho
Coordinates44.50792, -114.22344
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width45 ft (13.7 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,300 (2023)
Projected traffic3,450 by 2042
Trucks7%
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$617,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 93 over Garden Creek built?

It was built in 1941, making it 84 years old in 2025.

What condition is US 93 over Garden 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 October 2024.

How much traffic does US 93 over Garden Creek carry?

About 2,300 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US 93 over Garden Creek?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m) and a deck 45 ft wide.

Who owns US 93 over Garden Creek?

It is owned by the State Highway Agency.