US Bridges

SR 202 over Overflow Channel

FairPosted for load

King County, Washington · 7.5 E JCT SR 203 · Structure no. 0000857A0000000

Built
1925
100 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete Continuous
Length
120 ft
4 main spans
Daily traffic
11,531
2023 count
Owner
State
State Highway Agency

About this bridge

SR 202 over Overflow Channel is a concrete continuous tee beam carrying SR 202 over Overflow Channel in King County, Washington. It was built in 1925, so it is 100 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. Its operating status is: posted for load restriction.

It carries about 11,531 vehicles a day, roughly 7% of them trucks, projected to reach 16,349 by 2039. The structure is 120 ft (36.6 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSR 202
CrossesOverflow Channel
Location7.5 E JCT SR 203
RouteState Highway 202
CountyKing County
StateWashington
Coordinates47.50105, -121.79124
Functional classUrban 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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 rating29.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length120 ft (36.6 m)
Longest span30 ft (9.1 m)
Deck width25 ft (7.5 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,531 (2023)
Projected traffic16,349 by 2039
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 202 over Overflow Channel built?

It was built in 1925, making it 100 years old in 2025.

What condition is SR 202 over Overflow Channel 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 March 2024.

How much traffic does SR 202 over Overflow Channel carry?

About 11,531 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is SR 202 over Overflow Channel?

The structure is 120 ft (36.6 m) long with a longest span of 30 ft (9.1 m) and a deck 25 ft wide.

Who owns SR 202 over Overflow Channel?

It is owned by the State Highway Agency.