US Bridges

Conant Basin RD over Crooked River

Fair

Crook County, Oregon · 002 MI South HWY 380 · Structure no. 19913 310 00020

Built
2002
23 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
123 ft
1 main span
Daily traffic
151
2020 count
Owner
County
County Highway Agency

About this bridge

Conant Basin RD over Crooked River is a prestressed concrete stringer/multi-beam or girder carrying Conant Basin RD over Crooked River in Crook County, Oregon. It was built in 2002, so it is 23 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 151 vehicles a day, roughly 5% of them trucks, projected to reach 172 by 2025. The structure is 123 ft (37.5 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesConant Basin RD
CrossesCrooked River
Location002 MI South HWY 380
RouteCounty Highway C0310
StateOregon
Coordinates44.17261, -120.54205
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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
ScourFoundations stable; scour above top of footing
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 rating48.2 US tons
Inventory rating37.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length123 ft (37.5 m)
Longest span121 ft (37 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic151 (2020)
Projected traffic172 by 2025
Trucks5%
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 Conant Basin RD over Crooked River built?

It was built in 2002, making it 23 years old in 2025.

What condition is Conant Basin RD over Crooked 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 August 2024.

How much traffic does Conant Basin RD over Crooked River carry?

About 151 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Conant Basin RD over Crooked River?

The structure is 123 ft (37.5 m) long with a longest span of 121 ft (37 m) and a deck 26 ft wide.

Who owns Conant Basin RD over Crooked River?

It is owned by the County Highway Agency.