US Bridges

Wilson Road over Watson Slough Canal

Fair

Bingham County, Idaho · 1.6 S. 2.0 W. Riverside · Structure no. 000000000023040

Built
1968
57 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Prestressed Concrete
Length
22 ft
1 main span
Daily traffic
235
2023 count
Owner
County
County Highway Agency

About this bridge

Wilson Road over Watson Slough Canal is a prestressed concrete tee beam carrying Wilson Road over Watson Slough Canal in Bingham County, Idaho. It was built in 1968, so it is 57 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 235 vehicles a day, roughly 10% of them trucks, projected to reach 353 by 2039. The structure is 22 ft (6.7 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesWilson Road
CrossesWatson Slough Canal
Location1.6 S. 2.0 W. Riverside
RouteCounty Highway 0
CountyBingham County
StateIdaho
Coordinates43.17436, -112.47483
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry6: Equal to present minimum 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 loadH 20
Structure length22 ft (6.7 m)
Longest span21 ft (6.4 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic235 (2023)
Projected traffic353 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway 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 Wilson Road over Watson Slough Canal built?

It was built in 1968, making it 57 years old in 2025.

What condition is Wilson Road over Watson Slough 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 Wilson Road over Watson Slough Canal carry?

About 235 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Wilson Road over Watson Slough Canal?

The structure is 22 ft (6.7 m) long with a longest span of 21 ft (6.4 m) and a deck 30 ft wide.

Who owns Wilson Road over Watson Slough Canal?

It is owned by the County Highway Agency.