US Bridges

Cassia Road over Farmers Coop Canal

FairPosted for load

Payette County, Idaho · 3.5S 3.4E New Plymouth · Structure no. 000000000028390

Built
1959
66 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete
Length
27 ft
1 main span
Daily traffic
80
2023 count
Owner
County
County Highway Agency

About this bridge

Cassia Road over Farmers Coop Canal is a concrete slab carrying Cassia Road over Farmers Coop Canal in Payette County, Idaho. It was built in 1959, so it is 66 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 80 vehicles a day, roughly 10% of them trucks, projected to reach 120 by 2039. The structure is 27 ft (8.2 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCassia Road
CrossesFarmers Coop Canal
Location3.5S 3.4E New Plymouth
RouteCounty Highway 0
CountyPayette County
StateIdaho
Coordinates43.92395, -116.75254
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30 US tons
Inventory rating18 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length27 ft (8.2 m)
Longest span25 ft (7.6 m)
Deck width33 ft (10 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2023)
Projected traffic120 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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$381,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cassia Road over Farmers Coop Canal built?

It was built in 1959, making it 66 years old in 2025.

What condition is Cassia Road over Farmers Coop 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 November 2024.

How much traffic does Cassia Road over Farmers Coop Canal carry?

About 80 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Cassia Road over Farmers Coop Canal?

The structure is 27 ft (8.2 m) long with a longest span of 25 ft (7.6 m) and a deck 33 ft wide.

Who owns Cassia Road over Farmers Coop Canal?

It is owned by the County Highway Agency.