US Bridges

Co. Rd.;old US 93 over R Canal

Fair

Jerome County, Idaho · 13.2 N. Twin Falls · Structure no. 000000000024825

Built
1934
91 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Concrete
Length
42 ft
1 main span
Daily traffic
5
2023 count
Owner
State
State Highway Agency

About this bridge

Co. Rd.;old US 93 over R Canal is a concrete tee beam carrying Co. Rd.;old US 93 over R Canal in Jerome County, Idaho. It was built in 1934, so it is 91 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 5 vehicles a day, roughly 10% of them trucks, projected to reach 8 by 2039. The structure is 42 ft (12.8 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesCo. Rd.;old US 93
CrossesR Canal
Location13.2 N. Twin Falls
RouteCounty Highway 0
CountyJerome County
StateIdaho
Coordinates42.78042, -114.43378
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
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 geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating46 US tons
Inventory rating28 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length42 ft (12.8 m)
Longest span40 ft (12.2 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2023)
Projected traffic8 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$485,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Co. Rd.;old US 93 over R Canal built?

It was built in 1934, making it 91 years old in 2025.

What condition is Co. Rd.;old US 93 over R 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 Co. Rd.;old US 93 over R Canal carry?

About 5 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Co. Rd.;old US 93 over R Canal?

The structure is 42 ft (12.8 m) long with a longest span of 40 ft (12.2 m) and a deck 28 ft wide.

Who owns Co. Rd.;old US 93 over R Canal?

It is owned by the State Highway Agency.