US Bridges

US 30 over Salmon Falls Creek

Good

Twin Falls County, Idaho · 11.0 N Buhl · Structure no. 000000000013586

Built
2020
5 years old
Condition
Good
inspected July 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
102 ft
1 main span
Daily traffic
3,000
2023 count
Owner
State
State Highway Agency

About this bridge

US 30 over Salmon Falls Creek is a steel stringer/multi-beam or girder carrying US 30 over Salmon Falls Creek in Twin Falls County, Idaho. It was built in 2020, so it is 5 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,000 vehicles a day, roughly 10% of them trucks, projected to reach 4,500 by 2042. The structure is 102 ft (31.1 m) long and 52 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS 30
CrossesSalmon Falls Creek
Location11.0 N Buhl
RouteU.S. Route 30
CountyTwin Falls County
StateIdaho
Coordinates42.69661, -114.85516
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.3 US tons
Inventory rating57.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length102 ft (31.1 m)
Longest span100 ft (30.5 m)
Deck width52 ft (15.9 m)
Roadway width49 ft (15 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2023)
Projected traffic4,500 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 30 over Salmon Falls Creek built?

It was built in 2020, making it 5 years old in 2025.

What condition is US 30 over Salmon Falls 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 July 2022.

How much traffic does US 30 over Salmon Falls Creek carry?

About 3,000 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is US 30 over Salmon Falls Creek?

The structure is 102 ft (31.1 m) long with a longest span of 100 ft (30.5 m) and a deck 52 ft wide.

Who owns US 30 over Salmon Falls Creek?

It is owned by the State Highway Agency.