US Bridges

US 30 over Perrine Coulee Canal

Fair

Twin Falls County, Idaho · Near Twin Falls Secl · Structure no. 000000000013635

Built
1960
65 years old
Condition
Fair
inspected March 2021
Type
Frame
Concrete
Length
25 ft
1 main span
Daily traffic
15,500
2023 count
Owner
State
State Highway Agency

About this bridge

US 30 over Perrine Coulee Canal is a concrete frame carrying US 30 over Perrine Coulee Canal in Twin Falls County, Idaho. It was built in 1960, 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 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 15,500 vehicles a day, roughly 7% of them trucks, projected to reach 23,250 by 2042. The structure is 25 ft (7.6 m) long and 263 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS 30
CrossesPerrine Coulee Canal
LocationNear Twin Falls Secl
RouteU.S. Route 30
CountyTwin Falls County
StateIdaho
Coordinates42.54833, -114.44078
Functional classUrban Other Principal Arterial

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 protection8 Very GoodNo problems noted.
Last inspectionMarch 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to 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 rating71 US tons
Inventory rating42 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span25 ft (7.6 m)
Deck width263 ft (80.3 m)
Roadway width261 ft (79.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,500 (2023)
Projected traffic23,250 by 2042
Trucks7%
Lanes on structure8
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 Perrine Coulee Canal built?

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

What condition is US 30 over Perrine Coulee Canal 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 March 2021.

How much traffic does US 30 over Perrine Coulee Canal carry?

About 15,500 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US 30 over Perrine Coulee Canal?

The structure is 25 ft (7.6 m) long with a longest span of 25 ft (7.6 m) and a deck 263 ft wide.

Who owns US 30 over Perrine Coulee Canal?

It is owned by the State Highway Agency.