US Bridges

Or 224 (hwy 171) over Clack Rvr. (carter Br.)

Fair

Clackamas County, Oregon · 15.3 MI SE Estacada · Structure no. 08988 171 03877

Built
1954
71 years old, rebuilt 1970
Condition
Fair
inspected August 2023
Type
Truss - Thru
Steel
Length
352 ft
1 main span
Daily traffic
337
2022 count
Owner
State
State Highway Agency

About this bridge

Or 224 (hwy 171) over Clack Rvr. (carter Br.) is a steel truss - thru carrying Or 224 (hwy 171) over Clack Rvr. (carter Br.) in Clackamas County, Oregon. It was built in 1954 and reconstructed in 1970, so it is 71 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 337 vehicles a day, roughly 22% of them trucks, projected to reach 350 by 2042. The structure is 352 ft (107.2 m) long and 29 ft wide. If it were closed, the detour would be 52.8 mi (85 km).

Location

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CarriesOr 224 (hwy 171)
CrossesClack Rvr. (carter Br.)
Location15.3 MI SE Estacada
RouteState Highway 224
CountyClackamas County
StateOregon
Coordinates45.16681, -122.15576
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 protection7 GoodSome minor problems.
Last inspectionAugust 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+3 approach)
Design loadH 20
Structure length352 ft (107.2 m)
Longest span240 ft (73.2 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deck17 ft (5.3 m)

Traffic and service

Average daily traffic337 (2022)
Projected traffic350 by 2042
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed52.8 mi (85 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Or 224 (hwy 171) over Clack Rvr. (carter Br.) built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1970.

What condition is Or 224 (hwy 171) over Clack Rvr. (carter Br.) 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 2023.

How much traffic does Or 224 (hwy 171) over Clack Rvr. (carter Br.) carry?

About 337 vehicles per day (2022 count), of which roughly 22% are trucks.

How long is Or 224 (hwy 171) over Clack Rvr. (carter Br.)?

The structure is 352 ft (107.2 m) long with a longest span of 240 ft (73.2 m) and a deck 29 ft wide.

Who owns Or 224 (hwy 171) over Clack Rvr. (carter Br.)?

It is owned by the State Highway Agency.