US Bridges

Germantown Road over Rock Creek

Fair

Washington County, Oregon · 006 MI W County Line · Structure no. 19033 020300520

Built
2000
25 years old
Condition
Fair
inspected August 2024
Type
Slab
Prestressed Concrete
Length
67 ft
1 main span
Daily traffic
2,833
2020 count
Owner
County
County Highway Agency

About this bridge

Germantown Road over Rock Creek is a prestressed concrete slab carrying Germantown Road over Rock Creek in Washington County, Oregon. It was built in 2000, so it is 25 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 2,833 vehicles a day, roughly 5% of them trucks, projected to reach 3,125 by 2025. The structure is 67 ft (20.3 m) long and 40 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesGermantown Road
CrossesRock Creek
Location006 MI W County Line
RouteCounty Highway CA104
CountyWashington County
StateOregon
Coordinates45.57961, -122.85844
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.8 US tons
Inventory rating25.4 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length67 ft (20.3 m)
Longest span66 ft (20 m)
Deck width40 ft (12.2 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,833 (2020)
Projected traffic3,125 by 2025
Trucks5%
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 Germantown Road over Rock Creek built?

It was built in 2000, making it 25 years old in 2025.

What condition is Germantown Road 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 Germantown Road over Rock Creek carry?

About 2,833 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Germantown Road over Rock Creek?

The structure is 67 ft (20.3 m) long with a longest span of 66 ft (20 m) and a deck 40 ft wide.

Who owns Germantown Road over Rock Creek?

It is owned by the County Highway Agency.