US Bridges

Johnson Creek Blvd over Johnson Creek

Good

Clackamas County, Oregon · 06 MI W of SE 82nd Ave · Structure no. 20408 028 00060

Built
2006
19 years old
Condition
Good
inspected May 2023
Type
Slab
Prestressed Concrete
Length
85 ft
1 main span
Daily traffic
14,098
2020 count
Owner
County
County Highway Agency

About this bridge

Johnson Creek Blvd over Johnson Creek is a prestressed concrete slab carrying Johnson Creek Blvd over Johnson Creek in Clackamas County, Oregon. It was built in 2006, so it is 19 years old, younger than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 14,098 vehicles a day, roughly 10% of them trucks, projected to reach 15,548 by 2025. The structure is 85 ft (25.8 m) long and 64 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesJohnson Creek Blvd
CrossesJohnson Creek
Location06 MI W of SE 82nd Ave
RouteCounty Highway 9704
StateOregon
Coordinates45.45589, -122.59072
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.5 US tons
Inventory rating76.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length85 ft (25.8 m)
Longest span82 ft (25 m)
Deck width64 ft (19.6 m)
Roadway width48 ft (14.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,098 (2020)
Projected traffic15,548 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Johnson Creek Blvd over Johnson Creek built?

It was built in 2006, making it 19 years old in 2025.

What condition is Johnson Creek Blvd over Johnson Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does Johnson Creek Blvd over Johnson Creek carry?

About 14,098 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Johnson Creek Blvd over Johnson Creek?

The structure is 85 ft (25.8 m) long with a longest span of 82 ft (25 m) and a deck 64 ft wide.

Who owns Johnson Creek Blvd over Johnson Creek?

It is owned by the County Highway Agency.