US Bridges

Foster RD over Rock Creek

Fair

Clackamas County, Oregon · 1.8 M N of HWY 212 · Structure no. 06040 054 00173

Built
1976
49 years old
Condition
Fair
inspected July 2024
Type
Slab
Prestressed Concrete
Length
28 ft
1 main span
Daily traffic
11,400
2018 count
Owner
County
County Highway Agency

About this bridge

Foster RD over Rock Creek is a prestressed concrete slab carrying Foster RD over Rock Creek in Clackamas County, Oregon. It was built in 1976, so it is 49 years old, younger 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 11,400 vehicles a day, roughly 11% of them trucks, projected to reach 11,500 by 2038. The structure is 28 ft (8.5 m) long and 36 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesFoster RD
CrossesRock Creek
Location1.8 M N of HWY 212
RouteCounty Highway 0A637
CountyClackamas County
StateOregon
Coordinates45.4358, -122.47277
Functional classUrban 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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span27 ft (8.2 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,400 (2018)
Projected traffic11,500 by 2038
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Foster RD over Rock Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is Foster RD over Rock Creek 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 July 2024.

How much traffic does Foster RD over Rock Creek carry?

About 11,400 vehicles per day (2018 count), of which roughly 11% are trucks.

How long is Foster RD over Rock Creek?

The structure is 28 ft (8.5 m) long with a longest span of 27 ft (8.2 m) and a deck 36 ft wide.

Who owns Foster RD over Rock Creek?

It is owned by the County Highway Agency.