US Bridges

STC3742;WAMSTAD RD over Golden Gate Canal

Good

Canyon County, Idaho · 2.6 N. 2.0 W. Wilder · Structure no. 000000000027136

Built
1993
32 years old
Condition
Good
inspected October 2023
Type
Channel Beam
Concrete
Length
51 ft
3 main spans
Daily traffic
80
2023 count
Owner
Local
Other Local Agency

About this bridge

STC3742;WAMSTAD RD over Golden Gate Canal is a concrete channel beam carrying STC3742;WAMSTAD RD over Golden Gate Canal in Canyon County, Idaho. It was built in 1993, so it is 32 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 80 vehicles a day, roughly 14% of them trucks, projected to reach 120 by 2042. The structure is 51 ft (15.5 m) long and 28 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSTC3742;WAMSTAD RD
CrossesGolden Gate Canal
Location2.6 N. 2.0 W. Wilder
RouteCounty Highway 3742
CountyCanyon County
StateIdaho
Coordinates43.71378, -116.952
Functional classRural Major Collector

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 protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating99 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length51 ft (15.5 m)
Longest span17 ft (5.2 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2023)
Projected traffic120 by 2042
Trucks14%
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$68,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was STC3742;WAMSTAD RD over Golden Gate Canal built?

It was built in 1993, making it 32 years old in 2025.

What condition is STC3742;WAMSTAD RD over Golden Gate 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 October 2023.

How much traffic does STC3742;WAMSTAD RD over Golden Gate Canal carry?

About 80 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is STC3742;WAMSTAD RD over Golden Gate Canal?

The structure is 51 ft (15.5 m) long with a longest span of 17 ft (5.2 m) and a deck 28 ft wide.

Who owns STC3742;WAMSTAD RD over Golden Gate Canal?

It is owned by the Other Local Agency.