US Bridges

Keasey Road over Rock Creek

Fair

Columbia County, Oregon · 00 8 MI East Keasey · Structure no. 13650B306400100

Built
1980
45 years old
Condition
Fair
inspected May 2023
Type
Slab
Prestressed Concrete
Length
139 ft
2 main spans
Daily traffic
120
2020 count
Owner
County
County Highway Agency

About this bridge

Keasey Road over Rock Creek is a prestressed concrete slab carrying Keasey Road over Rock Creek in Columbia 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 120 vehicles a day, projected to reach 135 by 2025. The structure is 139 ft (42.4 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesKeasey Road
CrossesRock Creek
Location00 8 MI East Keasey
RouteCounty Highway A0756
CountyColumbia County
StateOregon
Coordinates45.87116, -123.32123
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
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 rating40 US tons
Inventory rating31.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length139 ft (42.4 m)
Longest span69 ft (21 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2020)
Projected traffic135 by 2025
Trucks0%
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 Keasey Road over Rock Creek built?

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

What condition is Keasey Road over Rock 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 May 2023.

How much traffic does Keasey Road over Rock Creek carry?

About 120 vehicles per day (2020 count).

How long is Keasey Road over Rock Creek?

The structure is 139 ft (42.4 m) long with a longest span of 69 ft (21 m) and a deck 28 ft wide.

Who owns Keasey Road over Rock Creek?

It is owned by the County Highway Agency.