US Bridges

1400 East Road over High Line Canal

FairPosted for load

Twin Falls County, Idaho · 7.5 S. 0.6 W. Buhl · Structure no. 000000000025355

Built
1915
110 years old, rebuilt 1964
Condition
Fair
inspected February 2023
Type
Truss - Thru
Steel
Length
38 ft
1 main span
Daily traffic
20
2023 count
Owner
Local
Other Local Agency

About this bridge

1400 East Road over High Line Canal is a steel truss - thru carrying 1400 East Road over High Line Canal in Twin Falls County, Idaho. It was built in 1915 and reconstructed in 1964, so it is 110 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. Its operating status is: posted for load restriction.

It carries about 20 vehicles a day, roughly 10% of them trucks, projected to reach 30 by 2039. The structure is 38 ft (11.6 m) long and 16 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries1400 East Road
CrossesHigh Line Canal
Location7.5 S. 0.6 W. Buhl
RouteCounty Highway 0
CountyTwin Falls County
StateIdaho
Coordinates42.49108, -114.77056
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
Deck8 Very GoodNo problems noted.
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 protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating16 US tons
Inventory rating9 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadH 15
Structure length38 ft (11.6 m)
Longest span36 ft (11 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2023)
Projected traffic30 by 2039
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$395,000 (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 1400 East Road over High Line Canal built?

It was built in 1915, making it 110 years old in 2025. It was reconstructed in 1964.

What condition is 1400 East Road over High 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 2023.

How much traffic does 1400 East Road over High Line Canal carry?

About 20 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is 1400 East Road over High Line Canal?

The structure is 38 ft (11.6 m) long with a longest span of 36 ft (11 m) and a deck 16 ft wide.

Who owns 1400 East Road over High Line Canal?

It is owned by the Other Local Agency.