US Bridges

3600 North RD over Twin Falls Main Canal

Fair

Twin Falls County, Idaho · 0.7 S. 1.2 E. Hansen · Structure no. 000000000025690

Built
1975
50 years old
Condition
Fair
inspected February 2023
Type
Channel Beam
Prestressed Concrete
Length
143 ft
4 main spans
Daily traffic
70
2023 count
Owner
Local
Other Local Agency

About this bridge

3600 North RD over Twin Falls Main Canal is a prestressed concrete channel beam carrying 3600 North RD over Twin Falls Main Canal in Twin Falls County, Idaho. It was built in 1975, so it is 50 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 6 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 70 vehicles a day, roughly 10% of them trucks, projected to reach 105 by 2039. The structure is 143 ft (43.6 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries3600 North RD
CrossesTwin Falls Main Canal
Location0.7 S. 1.2 E. Hansen
RouteCounty Highway 0
StateIdaho
Coordinates42.51871, -114.27667
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length143 ft (43.6 m)
Longest span35 ft (10.7 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (2023)
Projected traffic105 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

OwnerOther Local Agency
Maintained byOther Local Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 3600 North RD over Twin Falls Main Canal built?

It was built in 1975, making it 50 years old in 2025.

What condition is 3600 North RD over Twin Falls Main 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 February 2023.

How much traffic does 3600 North RD over Twin Falls Main Canal carry?

About 70 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is 3600 North RD over Twin Falls Main Canal?

The structure is 143 ft (43.6 m) long with a longest span of 35 ft (10.7 m) and a deck 28 ft wide.

Who owns 3600 North RD over Twin Falls Main Canal?

It is owned by the Other Local Agency.