US Bridges

Iowa Avenue over Lower Payette Canal

Fair

Payette County, Idaho · 1.5 N. 1.1 E. Payette · Structure no. 000000000028405

Built
1940
85 years old
Condition
Fair
inspected November 2023
Type
Frame
Concrete
Length
21 ft
1 main span
Daily traffic
150
2023 count
Owner
County
County Highway Agency

About this bridge

Iowa Avenue over Lower Payette Canal is a concrete frame carrying Iowa Avenue over Lower Payette Canal in Payette County, Idaho. It was built in 1940, so it is 85 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.

It carries about 150 vehicles a day, roughly 10% of them trucks, projected to reach 225 by 2039. The structure is 21 ft (6.4 m) long and 31 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesIowa Avenue
CrossesLower Payette Canal
Location1.5 N. 1.1 E. Payette
RouteCounty Highway 0
CountyPayette County
StateIdaho
Coordinates44.09503, -116.91328
Functional classUrban 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 protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating28.8 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2023)
Projected traffic225 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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$339,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Iowa Avenue over Lower Payette Canal built?

It was built in 1940, making it 85 years old in 2025.

What condition is Iowa Avenue over Lower Payette 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 2023.

How much traffic does Iowa Avenue over Lower Payette Canal carry?

About 150 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Iowa Avenue over Lower Payette Canal?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m) and a deck 31 ft wide.

Who owns Iowa Avenue over Lower Payette Canal?

It is owned by the County Highway Agency.