US Bridges

Elgin Road over Farmers Coop Canal

Fair

Payette County, Idaho · 4.1S 4.4E New Plymouth · Structure no. 000000000028420

Built
1950
75 years old, rebuilt 1981
Condition
Fair
inspected March 2023
Type
Tee Beam
Prestressed Concrete
Length
29 ft
1 main span
Daily traffic
80
2023 count
Owner
County
County Highway Agency

About this bridge

Elgin Road over Farmers Coop Canal is a prestressed concrete tee beam carrying Elgin Road over Farmers Coop Canal in Payette County, Idaho. It was built in 1950 and reconstructed in 1981, so it is 75 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 80 vehicles a day, roughly 10% of them trucks, projected to reach 120 by 2039. The structure is 29 ft (8.8 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesElgin Road
CrossesFarmers Coop Canal
Location4.1S 4.4E New Plymouth
RouteCounty Highway 0
CountyPayette County
StateIdaho
Coordinates43.91639, -116.73253
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.
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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no 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 alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating53 US tons
Inventory rating31 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length29 ft (8.8 m)
Longest span28 ft (8.5 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 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$339,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Elgin Road over Farmers Coop Canal built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1981.

What condition is Elgin 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 March 2023.

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

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

How long is Elgin Road over Farmers Coop Canal?

The structure is 29 ft (8.8 m) long with a longest span of 28 ft (8.5 m) and a deck 32 ft wide.

Who owns Elgin Road over Farmers Coop Canal?

It is owned by the County Highway Agency.