US Bridges

Olney Cut-Off Rd. over S Fork Klaskanine River

Fair

Clatsop County, Oregon · 008 MI SE of Olney · Structure no. 11171A060400050

Built
1977
48 years old
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
84 ft
1 main span
Daily traffic
338
2020 count
Owner
County
County Highway Agency

About this bridge

Olney Cut-Off Rd. over S Fork Klaskanine River is a prestressed concrete box beam or girders - multiple carrying Olney Cut-Off Rd. over S Fork Klaskanine River in Clatsop County, Oregon. It was built in 1977, so it is 48 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 338 vehicles a day, roughly 10% of them trucks, projected to reach 358 by 2025. The structure is 84 ft (25.6 m) long and 24 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesOlney Cut-Off Rd.
CrossesS Fork Klaskanine River
Location008 MI SE of Olney
RouteCounty Highway C0604
CountyClatsop County
StateOregon
Coordinates46.08969, -123.74631
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.1 US tons
Inventory rating47.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length84 ft (25.6 m)
Longest span83 ft (25.3 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic338 (2020)
Projected traffic358 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Olney Cut-Off Rd. over S Fork Klaskanine River built?

It was built in 1977, making it 48 years old in 2025.

What condition is Olney Cut-Off Rd. over S Fork Klaskanine River 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 March 2023.

How much traffic does Olney Cut-Off Rd. over S Fork Klaskanine River carry?

About 338 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Olney Cut-Off Rd. over S Fork Klaskanine River?

The structure is 84 ft (25.6 m) long with a longest span of 83 ft (25.3 m) and a deck 24 ft wide.

Who owns Olney Cut-Off Rd. over S Fork Klaskanine River?

It is owned by the County Highway Agency.