US Bridges

100 South Road over G Canal

Fair

Cassia County, Idaho · 0.1 S. 0.7 W. Declo · Structure no. 000000000024215

Built
1989
36 years old
Condition
Fair
inspected March 2022
Type
Frame
Concrete
Length
24 ft
1 main span
Daily traffic
250
2023 count
Owner
Local
Other Local Agency

About this bridge

100 South Road over G Canal is a concrete frame carrying 100 South Road over G Canal in Cassia County, Idaho. It was built in 1989, so it is 36 years old, younger 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 250 vehicles a day, roughly 10% of them trucks, projected to reach 375 by 2039. The structure is 24 ft (7.3 m) long and 36 ft wide.

Location

Open in Google Maps
Carries100 South Road
CrossesG Canal
Location0.1 S. 0.7 W. Declo
RouteCounty Highway 0
CountyCassia County
StateIdaho
Coordinates42.51806, -113.64347
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2022
Inspection intervalevery 48 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 rating54.6 US tons
Inventory rating34.7 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.4 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 closed—
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 100 South Road over G Canal built?

It was built in 1989, making it 36 years old in 2025.

What condition is 100 South Road over G 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 2022.

How much traffic does 100 South Road over G Canal carry?

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

How long is 100 South Road over G Canal?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m) and a deck 36 ft wide.

Who owns 100 South Road over G Canal?

It is owned by the Other Local Agency.