US Bridges

Wilson Road over Upton Slough

Fair

Jackson County, Oregon · 0.01 Milepost · Structure no. 29C115728 00001

Built
1959
66 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
2,153
2020 count
Owner
County
County Highway Agency

About this bridge

Wilson Road over Upton Slough is a concrete continuous culvert carrying Wilson Road over Upton Slough in Jackson County, Oregon. It was built in 1959, so it is 66 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 2,153 vehicles a day, roughly 10% of them trucks, projected to reach 2,528 by 2025. The structure is 22 ft (6.7 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesWilson Road
CrossesUpton Slough
Location0.01 Milepost
RouteCounty Highway C0728
CountyJackson County
StateOregon
Coordinates42.39655, -122.88574
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating29.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width34 ft (10.3 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,153 (2020)
Projected traffic2,528 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Wilson Road over Upton Slough built?

It was built in 1959, making it 66 years old in 2025.

What condition is Wilson Road over Upton Slough 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 June 2023.

How much traffic does Wilson Road over Upton Slough carry?

About 2,153 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Wilson Road over Upton Slough?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 34 ft wide.

Who owns Wilson Road over Upton Slough?

It is owned by the County Highway Agency.