US Bridges

Clark Creek Road over Grande Ronde River

Good

Union County, Oregon · 0.4 MI E of HWY 82 · Structure no. 10795A056 00037

Built
1972
53 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
185 ft
2 main spans
Daily traffic
578
2020 count
Owner
County
County Highway Agency

About this bridge

Clark Creek Road over Grande Ronde River is a prestressed concrete continuous stringer/multi-beam or girder carrying Clark Creek Road over Grande Ronde River in Union County, Oregon. It was built in 1972, so it is 53 years old, older than the Oregon average of 49.9 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 578 vehicles a day, roughly 5% of them trucks, projected to reach 688 by 2025. The structure is 185 ft (56.4 m) long and 31 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesClark Creek Road
CrossesGrande Ronde River
Location0.4 MI E of HWY 82
RouteCounty Highway 0
CountyUnion County
StateOregon
Coordinates45.5619, -117.90891
Functional classRural Minor 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than 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 alignment6: Equal to present minimum criteria
Operating rating80.7 US tons
Inventory rating62.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length185 ft (56.4 m)
Longest span91 ft (27.7 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic578 (2020)
Projected traffic688 by 2025
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 Clark Creek Road over Grande Ronde River built?

It was built in 1972, making it 53 years old in 2025.

What condition is Clark Creek Road over Grande Ronde River 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 September 2023.

How much traffic does Clark Creek Road over Grande Ronde River carry?

About 578 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Clark Creek Road over Grande Ronde River?

The structure is 185 ft (56.4 m) long with a longest span of 91 ft (27.7 m) and a deck 31 ft wide.

Who owns Clark Creek Road over Grande Ronde River?

It is owned by the County Highway Agency.