US Bridges

Or 211 (hwy 161) over Clackamas River

Fair

Clackamas County, Oregon · In Estacada · Structure no. 02208 161 03340

Built
1936
89 years old
Condition
Fair
inspected June 2023
Type
Arch - Deck
Concrete
Length
371 ft
1 main span
Daily traffic
7,518
2022 count
Owner
State
State Highway Agency

About this bridge

Or 211 (hwy 161) over Clackamas River is a concrete arch - deck carrying Or 211 (hwy 161) over Clackamas River in Clackamas County, Oregon. It was built in 1936, so it is 89 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 7,518 vehicles a day, roughly 13% of them trucks, projected to reach 8,400 by 2042. The structure is 371 ft (113.1 m) long and 35 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesOr 211 (hwy 161)
CrossesClackamas River
LocationIn Estacada
RouteState Highway 211
CountyClackamas County
StateOregon
Coordinates45.2827, -122.33203
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating18.5 US tons
Inventory rating14.3 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1 (+8 approach)
Design loadH 15
Structure length371 ft (113.1 m)
Longest span140 ft (42.7 m)
Deck width35 ft (10.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,518 (2022)
Projected traffic8,400 by 2042
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.9 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Or 211 (hwy 161) over Clackamas River built?

It was built in 1936, making it 89 years old in 2025.

What condition is Or 211 (hwy 161) over Clackamas 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 June 2023.

How much traffic does Or 211 (hwy 161) over Clackamas River carry?

About 7,518 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is Or 211 (hwy 161) over Clackamas River?

The structure is 371 ft (113.1 m) long with a longest span of 140 ft (42.7 m) and a deck 35 ft wide.

Who owns Or 211 (hwy 161) over Clackamas River?

It is owned by the State Highway Agency.