US Bridges

Or 99E(HWY 001E) over Clackamas River

FairPosted for load

Clackamas County, Oregon · 1.4 MI N Oregon City Cc · Structure no. 01617 01E 01120

Built
1933
92 years old
Condition
Fair
inspected November 2024
Type
Arch - Thru
Steel
Length
730 ft
3 main spans
Daily traffic
33,434
2022 count
Owner
State
State Highway Agency

About this bridge

Or 99E(HWY 001E) over Clackamas River is a steel arch - thru carrying Or 99E(HWY 001E) over Clackamas River in Clackamas County, Oregon. It was built in 1933, so it is 92 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. Its operating status is: posted for load restriction.

It carries about 33,434 vehicles a day, roughly 1% of them trucks, projected to reach 44,200 by 2042. The structure is 730 ft (222.6 m) long and 60 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesOr 99E(HWY 001E)
CrossesClackamas River
Location1.4 MI N Oregon City Cc
RouteState Highway 99
CountyClackamas County
StateOregon
Coordinates45.37316, -122.60152
Functional classUrban Other Principal 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating20.4 US tons
Inventory rating15.8 US tons

Structure

Structure typeArch - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans3 (+4 approach)
Design loadH 15
Structure length730 ft (222.6 m)
Longest span242 ft (73.8 m)
Deck width60 ft (18.4 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deck19 ft (5.6 m)

Traffic and service

Average daily traffic33,434 (2022)
Projected traffic44,200 by 2042
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$3.7 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Or 99E(HWY 001E) over Clackamas River built?

It was built in 1933, making it 92 years old in 2025.

What condition is Or 99E(HWY 001E) 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 November 2024.

How much traffic does Or 99E(HWY 001E) over Clackamas River carry?

About 33,434 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Or 99E(HWY 001E) over Clackamas River?

The structure is 730 ft (222.6 m) long with a longest span of 242 ft (73.8 m) and a deck 60 ft wide.

Who owns Or 99E(HWY 001E) over Clackamas River?

It is owned by the State Highway Agency.