US Bridges

W Snoq River RD NE over Drainage Ditch

Fair

King County, Washington · 2 MI N of SR-202 · Structure no. 087794000000000

Built
2008
17 years old
Condition
Fair
inspected September 2024
Type
Slab
Prestressed Concrete
Length
33 ft
1 main span
Daily traffic
798
2020 count
Owner
County
County Highway Agency

About this bridge

W Snoq River RD NE over Drainage Ditch is a prestressed concrete slab carrying W Snoq River RD NE over Drainage Ditch in King County, Washington. It was built in 2008, so it is 17 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 798 vehicles a day, roughly 2% of them trucks, projected to reach 1,440 by 2044. The structure is 33 ft (10.1 m) long and 24 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesW Snoq River RD NE
CrossesDrainage Ditch
Location2 MI N of SR-202
RouteCounty Highway 67850
Coordinates47.61152, -121.93439
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.4 US tons
Inventory rating43.5 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length33 ft (10.1 m)
Longest span31 ft (9.4 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic798 (2020)
Projected traffic1,440 by 2044
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$1.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was W Snoq River RD NE over Drainage Ditch built?

It was built in 2008, making it 17 years old in 2025.

What condition is W Snoq River RD NE over Drainage Ditch 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 2024.

How much traffic does W Snoq River RD NE over Drainage Ditch carry?

About 798 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is W Snoq River RD NE over Drainage Ditch?

The structure is 33 ft (10.1 m) long with a longest span of 31 ft (9.4 m) and a deck 24 ft wide.

Who owns W Snoq River RD NE over Drainage Ditch?

It is owned by the County Highway Agency.