US Bridges

Walker Lake Road over High Line Canal

FairPosted for load

Canyon County, Idaho · 1.3 N. 3.5 E. Marsing · Structure no. 000000000026740

Built
1967
58 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
90
2023 count
Owner
Local
Other Local Agency

About this bridge

Walker Lake Road over High Line Canal is a prestressed concrete tee beam carrying Walker Lake Road over High Line Canal in Canyon County, Idaho. It was built in 1967, so it is 58 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 90 vehicles a day, roughly 10% of them trucks, projected to reach 135 by 2039. The structure is 41 ft (12.5 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesWalker Lake Road
CrossesHigh Line Canal
Location1.3 N. 3.5 E. Marsing
RouteCounty Highway 0
CountyCanyon County
StateIdaho
Coordinates43.56768, -116.74292
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.
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 protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating30 US tons
Inventory rating18 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length41 ft (12.5 m)
Longest span37 ft (11.3 m)
Deck width32 ft (9.9 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90 (2023)
Projected traffic135 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$444,000 (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Walker Lake Road over High Line Canal built?

It was built in 1967, making it 58 years old in 2025.

What condition is Walker Lake 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 March 2024.

How much traffic does Walker Lake Road over High Line Canal carry?

About 90 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Walker Lake Road over High Line Canal?

The structure is 41 ft (12.5 m) long with a longest span of 37 ft (11.3 m) and a deck 32 ft wide.

Who owns Walker Lake Road over High Line Canal?

It is owned by the Other Local Agency.