US Bridges

Laduke Road over Gray Creek

Fair

Lane County, Oregon · 022 MI South Hyway 58 · Structure no. 39C623614000220

Built
1980
45 years old
Condition
Fair
inspected October 2024
Type
Slab
Prestressed Concrete
Length
56 ft
1 main span
Daily traffic
179
2020 count
Owner
County
County Highway Agency

About this bridge

Laduke Road over Gray Creek is a prestressed concrete slab carrying Laduke Road over Gray Creek in Lane County, Oregon. It was built in 1980, so it is 45 years old, younger 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 179 vehicles a day, roughly 10% of them trucks, projected to reach 184 by 2025. The structure is 56 ft (17.1 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesLaduke Road
CrossesGray Creek
Location022 MI South Hyway 58
RouteCounty Highway C6140
StateOregon
Coordinates43.74042, -122.50444
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
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 rating74 US tons
Inventory rating41 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length56 ft (17.1 m)
Longest span55 ft (16.8 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic179 (2020)
Projected traffic184 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Laduke Road over Gray Creek built?

It was built in 1980, making it 45 years old in 2025.

What condition is Laduke Road over Gray Creek 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 October 2024.

How much traffic does Laduke Road over Gray Creek carry?

About 179 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Laduke Road over Gray Creek?

The structure is 56 ft (17.1 m) long with a longest span of 55 ft (16.8 m) and a deck 28 ft wide.

Who owns Laduke Road over Gray Creek?

It is owned by the County Highway Agency.