US Bridges

Kelly RD over Thomas Creek

Fair

Linn County, Oregon · 015MI SE Intsection CR4 · Structure no. 12935A062200150

Built
1979
46 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
221 ft
1 main span
Daily traffic
494
2021 count
Owner
County
County Highway Agency

About this bridge

Kelly RD over Thomas Creek is a prestressed concrete stringer/multi-beam or girder carrying Kelly RD over Thomas Creek in Linn County, Oregon. It was built in 1979, so it is 46 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 494 vehicles a day, roughly 15% of them trucks, projected to reach 618 by 2041. The structure is 221 ft (67.4 m) long and 33 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesKelly RD
CrossesThomas Creek
Location015MI SE Intsection CR4
RouteCounty Highway A0496
CountyLinn County
StateOregon
Coordinates44.69, -122.9396
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
Deck7 GoodSome minor problems.
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 inspectionJuly 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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37.1 US tons
Inventory rating28.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length221 ft (67.4 m)
Longest span130 ft (39.6 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic494 (2021)
Projected traffic618 by 2041
Trucks15%
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 Kelly RD over Thomas Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is Kelly RD over Thomas 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 July 2023.

How much traffic does Kelly RD over Thomas Creek carry?

About 494 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is Kelly RD over Thomas Creek?

The structure is 221 ft (67.4 m) long with a longest span of 130 ft (39.6 m) and a deck 33 ft wide.

Who owns Kelly RD over Thomas Creek?

It is owned by the County Highway Agency.