US Bridges

Dever-Conner Road over Crooks Creek

Fair

Linn County, Oregon · 030 MI N Millersburg · Structure no. 12778A003400126

Built
1962
63 years old
Condition
Fair
inspected October 2024
Type
Slab
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
566
2021 count
Owner
County
County Highway Agency

About this bridge

Dever-Conner Road over Crooks Creek is a prestressed concrete slab carrying Dever-Conner Road over Crooks Creek in Linn County, Oregon. It was built in 1962, so it is 63 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 566 vehicles a day, roughly 15% of them trucks, projected to reach 798 by 2041. The structure is 30 ft (9.1 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesDever-Conner Road
CrossesCrooks Creek
Location030 MI N Millersburg
RouteCounty Highway A0500
StateOregon
Coordinates44.71918, -123.07736
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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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 rating35.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width28 ft (8.6 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic566 (2021)
Projected traffic798 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Dever-Conner Road over Crooks Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is Dever-Conner Road over Crooks 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 October 2024.

How much traffic does Dever-Conner Road over Crooks Creek carry?

About 566 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is Dever-Conner Road over Crooks Creek?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 28 ft wide.

Who owns Dever-Conner Road over Crooks Creek?

It is owned by the County Highway Agency.