US Bridges

500 West over East Canal

FairPosted for load

Cassia County, Idaho · 1.9 S. 0.8 W. Oakley · Structure no. 000000000023970

Built
1952
73 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete
Length
27 ft
1 main span
Daily traffic
200
2023 count
Owner
Local
Other Local Agency

About this bridge

500 West over East Canal is a concrete slab carrying 500 West over East Canal in Cassia County, Idaho. It was built in 1952, so it is 73 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 200 vehicles a day, roughly 20% of them trucks, projected to reach 300 by 2039. The structure is 27 ft (8.2 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries500 West
CrossesEast Canal
Location1.9 S. 0.8 W. Oakley
RouteCounty Highway 0
CountyCassia County
StateIdaho
Coordinates42.21581, -113.89767
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating18 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length27 ft (8.2 m)
Longest span25 ft (7.6 m)
Deck width24 ft (7.4 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2023)
Projected traffic300 by 2039
Trucks20%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$326,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 500 West over East Canal built?

It was built in 1952, making it 73 years old in 2025.

What condition is 500 West over East 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 2023.

How much traffic does 500 West over East Canal carry?

About 200 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is 500 West over East Canal?

The structure is 27 ft (8.2 m) long with a longest span of 25 ft (7.6 m) and a deck 24 ft wide.

Who owns 500 West over East Canal?

It is owned by the Other Local Agency.