US Bridges

422nd Ave over Cedar Creek

Fair

Clackamas County, Oregon · 0.5 Miles S Coalman Rd. · Structure no. 18395

Built
1996
29 years old
Condition
Fair
inspected July 2024
Type
Girder and Floorbeam System
Steel
Length
53 ft
1 main span
Daily traffic
695
2020 count
Owner
County
County Highway Agency

About this bridge

422nd Ave over Cedar Creek is a steel girder and floorbeam system carrying 422nd Ave over Cedar Creek in Clackamas County, Oregon. It was built in 1996, so it is 29 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 695 vehicles a day, projected to reach 775 by 2025. The structure is 53 ft (16.2 m) long and 12 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
Carries422nd Ave
CrossesCedar Creek
Location0.5 Miles S Coalman Rd.
RouteCounty Highway 5006
CountyClackamas County
StateOregon
Coordinates45.39389, -122.22841
Functional classRural Minor Arterial

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.1 US tons
Inventory rating32.5 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckSteel plate
Main spans1
Design loadHS 20
Structure length53 ft (16.2 m)
Longest span51 ft (15.5 m)
Deck width12 ft (3.8 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic695 (2020)
Projected traffic775 by 2025
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$272,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 422nd Ave over Cedar Creek built?

It was built in 1996, making it 29 years old in 2025.

What condition is 422nd Ave over Cedar 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 2024.

How much traffic does 422nd Ave over Cedar Creek carry?

About 695 vehicles per day (2020 count).

How long is 422nd Ave over Cedar Creek?

The structure is 53 ft (16.2 m) long with a longest span of 51 ft (15.5 m) and a deck 12 ft wide.

Who owns 422nd Ave over Cedar Creek?

It is owned by the County Highway Agency.