US Bridges

S 400 W over G Canal

Good

Cassia County, Idaho · 4.0 W 0.7 S Burley · Structure no. 000000000019593

Built
1994
31 years old
Condition
Good
inspected March 2023
Type
Frame
Concrete
Length
21 ft
1 main span
Daily traffic
1,000
2023 count
Owner
Local
Other Local Agency

About this bridge

S 400 W over G Canal is a concrete frame carrying S 400 W over G Canal in Cassia County, Idaho. It was built in 1994, so it is 31 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 1,000 vehicles a day, roughly 11% of them trucks, projected to reach 1,500 by 2042. The structure is 21 ft (6.4 m) long and 48 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesS 400 W
CrossesG Canal
Location4.0 W 0.7 S Burley
RouteCounty Highway 0
StateIdaho
Coordinates42.52636, -113.87278
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
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 rating65 US tons
Inventory rating39 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width48 ft (14.6 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2023)
Projected traffic1,500 by 2042
Trucks11%
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

OwnerOther Local Agency
Maintained byOther Local 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 S 400 W over G Canal built?

It was built in 1994, making it 31 years old in 2025.

What condition is S 400 W over G Canal 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 March 2023.

How much traffic does S 400 W over G Canal carry?

About 1,000 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is S 400 W over G Canal?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m) and a deck 48 ft wide.

Who owns S 400 W over G Canal?

It is owned by the Other Local Agency.