US Bridges

US 93 over Rock Creek

Fair

Twin Falls County, Idaho · 2.5 W. Twin Falls · Structure no. 000000000019391

Built
2011
14 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
498 ft
3 main spans
Daily traffic
15,000
2023 count
Owner
State
State Highway Agency

About this bridge

US 93 over Rock Creek is a steel continuous stringer/multi-beam or girder carrying US 93 over Rock Creek in Twin Falls County, Idaho. It was built in 2011, so it is 14 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 15,000 vehicles a day, roughly 9% of them trucks, projected to reach 22,500 by 2042. The structure is 498 ft (151.8 m) long and 79 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 93
CrossesRock Creek
Location2.5 W. Twin Falls
RouteU.S. Route 93
CountyTwin Falls County
StateIdaho
Coordinates42.59347, -114.53042
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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length498 ft (151.8 m)
Longest span164 ft (50 m)
Deck width79 ft (24 m)
Roadway width75 ft (23 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,000 (2023)
Projected traffic22,500 by 2042
Trucks9%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 US 93 over Rock Creek built?

It was built in 2011, making it 14 years old in 2025.

What condition is US 93 over Rock 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 August 2023.

How much traffic does US 93 over Rock Creek carry?

About 15,000 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is US 93 over Rock Creek?

The structure is 498 ft (151.8 m) long with a longest span of 164 ft (50 m) and a deck 79 ft wide.

Who owns US 93 over Rock Creek?

It is owned by the State Highway Agency.