US Bridges

Kelly RD NE over Harris Creek

Good

King County, Washington · 2.5 MI E of SR-203 · Structure no. 087292000000000

Built
2005
20 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
80 ft
1 main span
Daily traffic
3,101
2023 count
Owner
County
County Highway Agency

About this bridge

Kelly RD NE over Harris Creek is a prestressed concrete stringer/multi-beam or girder carrying Kelly RD NE over Harris Creek in King County, Washington. It was built in 2005, so it is 20 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 3,101 vehicles a day, roughly 6% of them trucks, projected to reach 5,600 by 2043. The structure is 80 ft (24.4 m) long and 37 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesKelly RD NE
CrossesHarris Creek
Location2.5 MI E of SR-203
RouteCounty Highway 98950
Coordinates47.69439, -121.90022
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
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 evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.8 US tons
Inventory rating53.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length80 ft (24.4 m)
Longest span75 ft (22.9 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,101 (2023)
Projected traffic5,600 by 2043
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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$3.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Kelly RD NE over Harris Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is Kelly RD NE over Harris 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 July 2023.

How much traffic does Kelly RD NE over Harris Creek carry?

About 3,101 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Kelly RD NE over Harris Creek?

The structure is 80 ft (24.4 m) long with a longest span of 75 ft (22.9 m) and a deck 37 ft wide.

Who owns Kelly RD NE over Harris Creek?

It is owned by the County Highway Agency.