US Bridges

SR 203 over Clemons Creek

Good

King County, Washington · 14.6 N JCT SR 202 · Structure no. 0018676A0000000

Built
2015
10 years old
Condition
Good
inspected October 2023
Type
Culvert
Prestressed Concrete
Length
27 ft
1 main span
Daily traffic
13,062
2023 count
Owner
State
State Highway Agency

About this bridge

SR 203 over Clemons Creek is a prestressed concrete culvert carrying SR 203 over Clemons Creek in King County, Washington. It was built in 2015, so it is 10 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 13,062 vehicles a day, roughly 8% of them trucks, projected to reach 18,371 by 2039. The structure is 27 ft (8.2 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR 203
CrossesClemons Creek
Location14.6 N JCT SR 202
RouteState Highway 203
Coordinates47.73667, -121.98736
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionOctober 2023
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.1 US tons
Inventory rating27.1 US tons

Structure

Structure typeCulvert
MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length27 ft (8.2 m)
Longest span25 ft (7.6 m)
Deck width60 ft (18.3 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,062 (2023)
Projected traffic18,371 by 2039
Trucks8%
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 statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 203 over Clemons Creek built?

It was built in 2015, making it 10 years old in 2025.

What condition is SR 203 over Clemons Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does SR 203 over Clemons Creek carry?

About 13,062 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SR 203 over Clemons Creek?

The structure is 27 ft (8.2 m) long with a longest span of 25 ft (7.6 m) and a deck 60 ft wide.

Who owns SR 203 over Clemons Creek?

It is owned by the State Highway Agency.