US Bridges

W South Slope RD over Farmers Coop Canal

Fair

Gem County, Idaho · 1.6 S. 5.1 W. Emmett · Structure no. 000000000028010

Built
1955
70 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
28 ft
1 main span
Daily traffic
710
2023 count
Owner
County
County Highway Agency

About this bridge

W South Slope RD over Farmers Coop Canal is a steel stringer/multi-beam or girder carrying W South Slope RD over Farmers Coop Canal in Gem County, Idaho. It was built in 1955, so it is 70 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 710 vehicles a day, roughly 4% of them trucks, projected to reach 1,065 by 2042. The structure is 28 ft (8.5 m) long and 22 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesW South Slope RD
CrossesFarmers Coop Canal
Location1.6 S. 5.1 W. Emmett
RouteCounty Highway 0
CountyGem County
StateIdaho
Coordinates43.85258, -116.60306
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 inspectionMarch 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating52 US tons
Inventory rating31 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length28 ft (8.5 m)
Longest span27 ft (8.2 m)
Deck width22 ft (6.6 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic710 (2023)
Projected traffic1,065 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$413,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was W South Slope RD over Farmers Coop Canal built?

It was built in 1955, making it 70 years old in 2025.

What condition is W South Slope RD 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 W South Slope RD over Farmers Coop Canal carry?

About 710 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is W South Slope RD over Farmers Coop Canal?

The structure is 28 ft (8.5 m) long with a longest span of 27 ft (8.2 m) and a deck 22 ft wide.

Who owns W South Slope RD over Farmers Coop Canal?

It is owned by the County Highway Agency.