US Bridges

SH 75 over Bradshaw Creek

Good

Custer County, Idaho · 14.1 S. Challis · Structure no. 000000000017805

Built
1988
37 years old
Condition
Good
inspected October 2022
Type
Frame
Concrete
Length
29 ft
1 main span
Daily traffic
600
2023 count
Owner
State
State Highway Agency

About this bridge

SH 75 over Bradshaw Creek is a concrete frame carrying SH 75 over Bradshaw Creek in Custer County, Idaho. It was built in 1988, so it is 37 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 600 vehicles a day, roughly 18% of them trucks, projected to reach 900 by 2042. The structure is 29 ft (8.8 m) long and 54 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesSH 75
CrossesBradshaw Creek
Location14.1 S. Challis
RouteState Highway 75
CountyCuster County
StateIdaho
Coordinates44.33414, -114.28392
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83 US tons
Inventory rating49.1 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length29 ft (8.8 m)
Longest span27 ft (8.2 m)
Deck width54 ft (16.6 m)
Roadway width52 ft (16 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2023)
Projected traffic900 by 2042
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 75 over Bradshaw Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is SH 75 over Bradshaw Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2022.

How much traffic does SH 75 over Bradshaw Creek carry?

About 600 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is SH 75 over Bradshaw Creek?

The structure is 29 ft (8.8 m) long with a longest span of 27 ft (8.2 m) and a deck 54 ft wide.

Who owns SH 75 over Bradshaw Creek?

It is owned by the State Highway Agency.