US Bridges

SR 202 over Patterson Creek

Fair

King County, Washington · 11.5 E JCT SR 520 · Structure no. 0001380A0000000

Built
1930
95 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete
Length
42 ft
1 main span
Daily traffic
7,187
2023 count
Owner
State
State Highway Agency

About this bridge

SR 202 over Patterson Creek is a concrete tee beam carrying SR 202 over Patterson Creek in King County, Washington. It was built in 1930, so it is 95 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 7,187 vehicles a day, roughly 9% of them trucks, projected to reach 11,161 by 2039. The structure is 42 ft (12.8 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSR 202
CrossesPatterson Creek
Location11.5 E JCT SR 520
RouteState Highway 202
CountyKing County
StateWashington
Coordinates47.57979, -121.93644
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.2 US tons
Inventory rating24.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length42 ft (12.8 m)
Longest span40 ft (12.2 m)
Deck width29 ft (8.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,187 (2023)
Projected traffic11,161 by 2039
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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$678,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 202 over Patterson Creek built?

It was built in 1930, making it 95 years old in 2025.

What condition is SR 202 over Patterson 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 July 2023.

How much traffic does SR 202 over Patterson Creek carry?

About 7,187 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is SR 202 over Patterson Creek?

The structure is 42 ft (12.8 m) long with a longest span of 40 ft (12.2 m) and a deck 29 ft wide.

Who owns SR 202 over Patterson Creek?

It is owned by the State Highway Agency.