US Bridges

3100 East Road over Low Line Canal

FairPosted for load

Twin Falls County, Idaho · 4.2 S. 1.5 E. Twin Falls · Structure no. 000000000025440

Built
1965
60 years old
Condition
Fair
inspected February 2024
Type
Tee Beam
Prestressed Concrete
Length
97 ft
2 main spans
Daily traffic
140
2023 count
Owner
Local
Other Local Agency

About this bridge

3100 East Road over Low Line Canal is a prestressed concrete tee beam carrying 3100 East Road over Low Line Canal in Twin Falls County, Idaho. It was built in 1965, so it is 60 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. Its operating status is: posted for load restriction.

It carries about 140 vehicles a day, roughly 10% of them trucks, projected to reach 210 by 2039. The structure is 97 ft (29.6 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries3100 East Road
CrossesLow Line Canal
Location4.2 S. 1.5 E. Twin Falls
RouteCounty Highway 0
CountyTwin Falls County
StateIdaho
Coordinates42.49472, -114.44056
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 15
Structure length97 ft (29.6 m)
Longest span47 ft (14.3 m)
Deck width29 ft (8.8 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic140 (2023)
Projected traffic210 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 3100 East Road over Low Line Canal built?

It was built in 1965, making it 60 years old in 2025.

What condition is 3100 East Road over Low Line 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 2024.

How much traffic does 3100 East Road over Low Line Canal carry?

About 140 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is 3100 East Road over Low Line Canal?

The structure is 97 ft (29.6 m) long with a longest span of 47 ft (14.3 m) and a deck 29 ft wide.

Who owns 3100 East Road over Low Line Canal?

It is owned by the Other Local Agency.