US Bridges

350 East Road over G Canal

Good

Cassia County, Idaho · 0.2 S. 5.0 W. Declo · Structure no. 000000000023935

Built
1986
39 years old
Condition
Good
inspected March 2024
Type
Frame
Concrete
Length
22 ft
1 main span
Daily traffic
250
2023 count
Owner
Local
Other Local Agency

About this bridge

350 East Road over G Canal is a concrete frame carrying 350 East Road over G Canal in Cassia County, Idaho. It was built in 1986, so it is 39 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 250 vehicles a day, roughly 10% of them trucks, projected to reach 375 by 2039. The structure is 22 ft (6.7 m) long and 36 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries350 East Road
CrossesG Canal
Location0.2 S. 5.0 W. Declo
RouteCounty Highway 0
StateIdaho
Coordinates42.51281, -113.72486
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 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span22 ft (6.7 m)
Deck width36 ft (11.1 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2023)
Projected traffic375 by 2039
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

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 350 East Road over G Canal built?

It was built in 1986, making it 39 years old in 2025.

What condition is 350 East Road 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 2024.

How much traffic does 350 East Road over G Canal carry?

About 250 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is 350 East Road over G Canal?

The structure is 22 ft (6.7 m) long with a longest span of 22 ft (6.7 m) and a deck 36 ft wide.

Who owns 350 East Road over G Canal?

It is owned by the Other Local Agency.