US Bridges

Drive Uhlman RD E over Greenwater River

Fair

King County, Washington · 0.2 MI NE of SR-410 · Structure no. 081052000000000

Built
1973
52 years old
Condition
Fair
inspected July 2023
Type
Girder and Floorbeam System
Steel
Length
105 ft
1 main span
Daily traffic
80
2023 count
Owner
County
County Highway Agency

About this bridge

Drive Uhlman RD E over Greenwater River is a steel girder and floorbeam system carrying Drive Uhlman RD E over Greenwater River in King County, Washington. It was built in 1973, so it is 52 years old, older than the Washington average of 49.8 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 80 vehicles a day, projected to reach 125 by 2039. The structure is 105 ft (32 m) long and 12 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesDrive Uhlman RD E
CrossesGreenwater River
Location0.2 MI NE of SR-410
RouteCounty Highway 31260
CountyKing County
StateWashington
Coordinates47.15594, -121.65153
Functional classRural Local

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.9 US tons
Inventory rating22.5 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length105 ft (32 m)
Longest span102 ft (31.1 m)
Deck width12 ft (3.7 m)
Roadway width11 ft (3.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2023)
Projected traffic125 by 2039
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Drive Uhlman RD E over Greenwater River built?

It was built in 1973, making it 52 years old in 2025.

What condition is Drive Uhlman RD E over Greenwater River 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 2023.

How much traffic does Drive Uhlman RD E over Greenwater River carry?

About 80 vehicles per day (2023 count).

How long is Drive Uhlman RD E over Greenwater River?

The structure is 105 ft (32 m) long with a longest span of 102 ft (31.1 m) and a deck 12 ft wide.

Who owns Drive Uhlman RD E over Greenwater River?

It is owned by the County Highway Agency.