US Bridges

350 East Road over H Canal

Fair

Cassia County, Idaho · 2.9S 5.0W DECLO;370S-350E · Structure no. 000000000024100

Built
1976
49 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
160
2023 count
Owner
Local
Other Local Agency

About this bridge

350 East Road over H Canal is a prestressed concrete tee beam carrying 350 East Road over H Canal in Cassia County, Idaho. It was built in 1976, so it is 49 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 160 vehicles a day, roughly 10% of them trucks, projected to reach 240 by 2039. The structure is 30 ft (9.1 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries350 East Road
CrossesH Canal
Location2.9S 5.0W DECLO;370S-350E
RouteCounty Highway 0
CountyCassia County
StateIdaho
Coordinates42.47792, -113.72478
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic160 (2023)
Projected traffic240 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 H Canal built?

It was built in 1976, making it 49 years old in 2025.

What condition is 350 East Road over H 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 2024.

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

About 160 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is 350 East Road over H Canal?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 30 ft wide.

Who owns 350 East Road over H Canal?

It is owned by the Other Local Agency.