US Bridges

Hollow Road over C Line West Canal

Fair

Canyon County, Idaho · 9.1 N. 0.4 E. Caldwell · Structure no. 000000000027190

Built
1985
40 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
70
2023 count
Owner
Local
Other Local Agency

About this bridge

Hollow Road over C Line West Canal is a prestressed concrete tee beam carrying Hollow Road over C Line West Canal in Canyon County, Idaho. It was built in 1985, so it is 40 years old, younger 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 30 ft (9.1 m) long and 36 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesHollow Road
CrossesC Line West Canal
Location9.1 N. 0.4 E. Caldwell
RouteCounty Highway 0
CountyCanyon County
StateIdaho
Coordinates43.79336, -116.678
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.5 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 Hollow Road over C Line West Canal built?

It was built in 1985, making it 40 years old in 2025.

What condition is Hollow Road over C Line West 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 Hollow Road over C Line West Canal carry?

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

How long is Hollow Road over C Line West Canal?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 36 ft wide.

Who owns Hollow Road over C Line West Canal?

It is owned by the Other Local Agency.