US Bridges

Wyatt Drive over Slough

Fair

Linn County, Oregon · 045MI South Harrisburg · Structure no. 12391 023600134

Built
1968
57 years old
Condition
Fair
inspected May 2023
Type
Slab
Prestressed Concrete
Length
74 ft
3 main spans
Daily traffic
62
2019 count
Owner
County
County Highway Agency

About this bridge

Wyatt Drive over Slough is a prestressed concrete slab carrying Wyatt Drive over Slough in Linn County, Oregon. It was built in 1968, so it is 57 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 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 62 vehicles a day, projected to reach 88 by 2039. The structure is 74 ft (22.6 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesWyatt Drive
CrossesSlough
Location045MI South Harrisburg
RouteCounty Highway C0236
CountyLinn County
StateOregon
Coordinates44.21819, -123.14766
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.6 US tons
Inventory rating29.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadHS 20
Structure length74 ft (22.6 m)
Longest span30 ft (9.1 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic62 (2019)
Projected traffic88 by 2039
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
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 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 Wyatt Drive over Slough built?

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

What condition is Wyatt Drive over 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 May 2023.

How much traffic does Wyatt Drive over Slough carry?

About 62 vehicles per day (2019 count).

How long is Wyatt Drive over Slough?

The structure is 74 ft (22.6 m) long with a longest span of 30 ft (9.1 m) and a deck 24 ft wide.

Who owns Wyatt Drive over Slough?

It is owned by the County Highway Agency.