US Bridges

Whiskey Hill RD over Rock Creek

Fair

Clackamas County, Oregon · 045 MI E HWY 99E · Structure no. 06543 015 00701

Built
1957
68 years old
Condition
Fair
inspected April 2023
Type
Tee Beam
Concrete Continuous
Length
130 ft
3 main spans
Daily traffic
11,450
2022 count
Owner
County
County Highway Agency

About this bridge

Whiskey Hill RD over Rock Creek is a concrete continuous tee beam carrying Whiskey Hill RD over Rock Creek in Clackamas County, Oregon. It was built in 1957, so it is 68 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 11,450 vehicles a day, roughly 2% of them trucks, projected to reach 14,300 by 2042. The structure is 130 ft (39.6 m) long and 31 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

Location

Open in Google Maps
CarriesWhiskey Hill RD
CrossesRock Creek
Location045 MI E HWY 99E
RouteCounty Highway 0A598
CountyClackamas County
StateOregon
Coordinates45.17392, -122.73768
Functional classRural Major 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 rating29.3 US tons
Inventory rating22.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length130 ft (39.6 m)
Longest span50 ft (15.2 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,450 (2022)
Projected traffic14,300 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed4.3 mi (7 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 Whiskey Hill RD over Rock Creek built?

It was built in 1957, making it 68 years old in 2025.

What condition is Whiskey Hill 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 April 2023.

How much traffic does Whiskey Hill RD over Rock Creek carry?

About 11,450 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Whiskey Hill RD over Rock Creek?

The structure is 130 ft (39.6 m) long with a longest span of 50 ft (15.2 m) and a deck 31 ft wide.

Who owns Whiskey Hill RD over Rock Creek?

It is owned by the County Highway Agency.