US Bridges

Frost Road over Low Line Canal

Good

Canyon County, Idaho · 5.2 S. 5.5 E. Wilder · Structure no. 000000000027175

Built
1990
35 years old
Condition
Good
inspected November 2021
Type
Stringer/Multi-beam or Girder
Steel
Length
23 ft
1 main span
Daily traffic
50
2023 count
Owner
Local
Other Local Agency

About this bridge

Frost Road over Low Line Canal is a steel stringer/multi-beam or girder carrying Frost Road over Low Line Canal in Canyon County, Idaho. It was built in 1990, so it is 35 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 50 vehicles a day, roughly 10% of them trucks, projected to reach 75 by 2039. The structure is 23 ft (7 m) long and 24 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesFrost Road
CrossesLow Line Canal
Location5.2 S. 5.5 E. Wilder
RouteCounty Highway 0
StateIdaho
Coordinates43.59981, -116.80256
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating40.7 US tons
Inventory rating30.8 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadH 15
Structure length23 ft (7 m)
Longest span22 ft (6.7 m)
Deck width24 ft (7.4 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic75 by 2039
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 Frost Road over Low Line Canal built?

It was built in 1990, making it 35 years old in 2025.

What condition is Frost Road over Low Line Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2021.

How much traffic does Frost Road over Low Line Canal carry?

About 50 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Frost Road over Low Line Canal?

The structure is 23 ft (7 m) long with a longest span of 22 ft (6.7 m) and a deck 24 ft wide.

Who owns Frost Road over Low Line Canal?

It is owned by the Other Local Agency.