US Bridges

Road over Snow Creek

Fair

King County, Washington · 0.1MI W of RD 54/50 JCT · Structure no. 060505000001381

Built
1979
46 years old
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
73 ft
1 main span
Daily traffic
33
1992 count
Owner
Federal
U.S. Forest Service

About this bridge

Road over Snow Creek is a prestressed concrete box beam or girders - multiple carrying Road over Snow Creek in King County, Washington. It was built in 1979, so it is 46 years old, younger 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 33 vehicles a day, projected to reach 49 by 2045. The structure is 73 ft (22.2 m) long and 17 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesRoad
CrossesSnow Creek
Location0.1MI W of RD 54/50 JCT
RouteFederal Lands Road 54000
CountyKing County
StateWashington
Coordinates47.25198, -121.40367
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating100.1 US tons
Inventory rating59.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length73 ft (22.2 m)
Longest span70 ft (21.2 m)
Deck width17 ft (5.3 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33 (1992)
Projected traffic49 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Road over Snow Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is Road over Snow 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 September 2023.

How much traffic does Road over Snow Creek carry?

About 33 vehicles per day (1992 count).

How long is Road over Snow Creek?

The structure is 73 ft (22.2 m) long with a longest span of 70 ft (21.2 m) and a deck 17 ft wide.

Who owns Road over Snow Creek?

It is owned by the U.S. Forest Service.