US Bridges

Clow Corner Road over N Fork Ash Creek

Fair

Polk County, Oregon · 012 W State HWY 99W · Structure no. 53C009085200225

Built
1957
68 years old, rebuilt 1980
Condition
Fair
inspected August 2024
Type
Tee Beam
Concrete Continuous
Length
86 ft
3 main spans
Daily traffic
6,536
2021 count
Owner
County
County Highway Agency

About this bridge

Clow Corner Road over N Fork Ash Creek is a concrete continuous tee beam carrying Clow Corner Road over N Fork Ash Creek in Polk County, Oregon. It was built in 1957 and reconstructed in 1980, so it is 68 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 6,536 vehicles a day, roughly 20% of them trucks, projected to reach 7,286 by 2041. The structure is 86 ft (26.2 m) long and 43 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesClow Corner Road
CrossesN Fork Ash Creek
Location012 W State HWY 99W
RouteCounty Highway 0
StateOregon
Coordinates44.89774, -123.25307
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 rating44 US tons
Inventory rating30 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length86 ft (26.2 m)
Longest span28 ft (8.5 m)
Deck width43 ft (13.2 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,536 (2021)
Projected traffic7,286 by 2041
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$573,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Clow Corner Road over N Fork Ash Creek built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1980.

What condition is Clow Corner Road over N Fork Ash 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 August 2024.

How much traffic does Clow Corner Road over N Fork Ash Creek carry?

About 6,536 vehicles per day (2021 count), of which roughly 20% are trucks.

How long is Clow Corner Road over N Fork Ash Creek?

The structure is 86 ft (26.2 m) long with a longest span of 28 ft (8.5 m) and a deck 43 ft wide.

Who owns Clow Corner Road over N Fork Ash Creek?

It is owned by the County Highway Agency.