US Bridges

SE 172nd Ave over Rock Creek

Fair

Clackamas County, Oregon · 01.71 MI N of HWY 212 · Structure no. 06287 000 00171

Built
1968
57 years old
Condition
Fair
inspected July 2024
Type
Slab
Prestressed Concrete
Length
29 ft
1 main span
Daily traffic
4,868
2020 count
Owner
County
County Highway Agency

About this bridge

SE 172nd Ave over Rock Creek is a prestressed concrete slab carrying SE 172nd Ave over Rock Creek in Clackamas County, Oregon. It was built in 1968, so it is 57 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 5 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 4,868 vehicles a day, roughly 10% of them trucks, projected to reach 5,212 by 2025. The structure is 29 ft (8.8 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSE 172nd Ave
CrossesRock Creek
Location01.71 MI N of HWY 212
RouteCounty Highway C0738
CountyClackamas County
StateOregon
Coordinates45.43543, -122.48574
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length29 ft (8.8 m)
Longest span29 ft (8.8 m)
Deck width28 ft (8.5 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,868 (2020)
Projected traffic5,212 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$149,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SE 172nd Ave over Rock Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is SE 172nd Ave 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 SE 172nd Ave over Rock Creek carry?

About 4,868 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is SE 172nd Ave over Rock Creek?

The structure is 29 ft (8.8 m) long with a longest span of 29 ft (8.8 m) and a deck 28 ft wide.

Who owns SE 172nd Ave over Rock Creek?

It is owned by the County Highway Agency.