US Bridges

Cornelius Pass RD over Rock Creek

Fair

Washington County, Oregon · 007 MI N Germantown Road · Structure no. 671343063200837

Built
1950
75 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Concrete Continuous
Length
59 ft
3 main spans
Daily traffic
9,915
2020 count
Owner
County
County Highway Agency

About this bridge

Cornelius Pass RD over Rock Creek is a concrete continuous tee beam carrying Cornelius Pass RD over Rock Creek in Washington County, Oregon. It was built in 1950, so it is 75 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 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 9,915 vehicles a day, roughly 10% of them trucks, projected to reach 10,935 by 2025. The structure is 59 ft (18 m) long and 31 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesCornelius Pass RD
CrossesRock Creek
Location007 MI N Germantown Road
RouteCounty Highway C1172
StateOregon
Coordinates45.58748, -122.86829
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 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 rating25 US tons
Inventory rating19.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length59 ft (18 m)
Longest span37 ft (11.3 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,915 (2020)
Projected traffic10,935 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$302,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Cornelius Pass RD over Rock Creek built?

It was built in 1950, making it 75 years old in 2025.

What condition is Cornelius Pass 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 August 2024.

How much traffic does Cornelius Pass RD over Rock Creek carry?

About 9,915 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Cornelius Pass RD over Rock Creek?

The structure is 59 ft (18 m) long with a longest span of 37 ft (11.3 m) and a deck 31 ft wide.

Who owns Cornelius Pass RD over Rock Creek?

It is owned by the County Highway Agency.