US Bridges

Kropf Road over Rock Creek

Poor

Clackamas County, Oregon · 1.7 MI S of HWY 211 · Structure no. 06506 010 00374

Built
1958
67 years old
Condition
Poor
inspected September 2024
Type
Girder and Floorbeam System
Steel
Length
94 ft
1 main span
Daily traffic
5,600
2018 count
Owner
County
County Highway Agency

About this bridge

Kropf Road over Rock Creek is a steel girder and floorbeam system carrying Kropf Road over Rock Creek in Clackamas County, Oregon. It was built in 1958, so it is 67 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 5,600 vehicles a day, roughly 24% of them trucks, projected to reach 5,700 by 2038. The structure is 94 ft (28.7 m) long and 29 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesKropf Road
CrossesRock Creek
Location1.7 MI S of HWY 211
RouteCounty Highway 0A605
CountyClackamas County
StateOregon
Coordinates45.12385, -122.68541
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure8 Very GoodNo problems noted.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be 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 rating26.8 US tons
Inventory rating20.7 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadUnknown
Structure length94 ft (28.7 m)
Longest span48 ft (14.6 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,600 (2018)
Projected traffic5,700 by 2038
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Kropf Road over Rock Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is Kropf Road over Rock Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.

How much traffic does Kropf Road over Rock Creek carry?

About 5,600 vehicles per day (2018 count), of which roughly 24% are trucks.

How long is Kropf Road over Rock Creek?

The structure is 94 ft (28.7 m) long with a longest span of 48 ft (14.6 m) and a deck 29 ft wide.

Who owns Kropf Road over Rock Creek?

It is owned by the County Highway Agency.