US Bridges

STC3717;FRIENDS RD over Deer Flat Low Line Canal

Fair

Canyon County, Idaho · 1.9 S. 4.5 E. Wilder · Structure no. 000000000027170

Built
1961
64 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
52 ft
2 main spans
Daily traffic
500
2023 count
Owner
Local
Other Local Agency

About this bridge

STC3717;FRIENDS RD over Deer Flat Low Line Canal is a concrete stringer/multi-beam or girder carrying STC3717;FRIENDS RD over Deer Flat Low Line Canal in Canyon County, Idaho. It was built in 1961, so it is 64 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.

It carries about 500 vehicles a day, roughly 25% of them trucks, projected to reach 750 by 2042. The structure is 52 ft (15.8 m) long and 27 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSTC3717;FRIENDS RD
CrossesDeer Flat Low Line Canal
Location1.9 S. 4.5 E. Wilder
RouteCounty Highway 3717
CountyCanyon County
StateIdaho
Coordinates43.64989, -116.82264
Functional classRural Major Collector

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 inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length52 ft (15.8 m)
Longest span25 ft (7.6 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2023)
Projected traffic750 by 2042
Trucks25%
Lanes on structure2
Traffic directionTwo-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 STC3717;FRIENDS RD over Deer Flat Low Line Canal built?

It was built in 1961, making it 64 years old in 2025.

What condition is STC3717;FRIENDS RD over Deer Flat 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 November 2023.

How much traffic does STC3717;FRIENDS RD over Deer Flat Low Line Canal carry?

About 500 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is STC3717;FRIENDS RD over Deer Flat Low Line Canal?

The structure is 52 ft (15.8 m) long with a longest span of 25 ft (7.6 m) and a deck 27 ft wide.

Who owns STC3717;FRIENDS RD over Deer Flat Low Line Canal?

It is owned by the Other Local Agency.