US Bridges

Or 99E(HWY81) SB over Hillside

Fair

Clackamas County, Oregon · 1.3 MI S Oregon City Cc · Structure no. 07164 01E 01386

Built
1949
76 years old
Condition
Fair
inspected November 2024
Type
Tee Beam
Concrete Continuous
Length
396 ft
14 main spans
Daily traffic
8,817
2022 count
Owner
State
State Highway Agency

About this bridge

Or 99E(HWY81) SB over Hillside is a concrete continuous tee beam carrying Or 99E(HWY81) SB over Hillside in Clackamas County, Oregon. It was built in 1949, so it is 76 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 8,817 vehicles a day, roughly 4% of them trucks, projected to reach 11,650 by 2042. The structure is 396 ft (120.7 m) long and 12 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesOr 99E(HWY81) SB
CrossesHillside
Location1.3 MI S Oregon City Cc
RouteState Highway 99
CountyClackamas County
StateOregon
Coordinates45.34499, -122.62877
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.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.1 US tons
Inventory rating21.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans14
Design loadUnknown
Structure length396 ft (120.7 m)
Longest span35 ft (10.7 m)
Deck width12 ft (3.8 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,817 (2022)
Projected traffic11,650 by 2042
Trucks4%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Or 99E(HWY81) SB over Hillside built?

It was built in 1949, making it 76 years old in 2025.

What condition is Or 99E(HWY81) SB over Hillside 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(HWY81) SB over Hillside carry?

About 8,817 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Or 99E(HWY81) SB over Hillside?

The structure is 396 ft (120.7 m) long with a longest span of 35 ft (10.7 m) and a deck 12 ft wide.

Who owns Or 99E(HWY81) SB over Hillside?

It is owned by the State Highway Agency.