US Bridges

SE 86th Street over Raging River

Good

King County, Washington · 0.1 MI E of Prstn-Fall RD · Structure no. 087125000000000

Built
2003
22 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
243 ft
2 main spans
Daily traffic
210
2020 count
Owner
County
County Highway Agency

About this bridge

SE 86th Street over Raging River is a prestressed concrete continuous stringer/multi-beam or girder carrying SE 86th Street over Raging River in King County, Washington. It was built in 2003, so it is 22 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 210 vehicles a day, roughly 1% of them trucks, projected to reach 250 by 2040. The structure is 243 ft (74.1 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSE 86th Street
CrossesRaging River
Location0.1 MI E of Prstn-Fall RD
RouteCounty Highway 86050
Coordinates47.52342, -121.92614
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating19 US tons
Inventory rating14.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length243 ft (74.1 m)
Longest span130 ft (39.6 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic210 (2020)
Projected traffic250 by 2040
Trucks1%
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

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$9.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SE 86th Street over Raging River built?

It was built in 2003, making it 22 years old in 2025.

What condition is SE 86th Street over Raging River 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 March 2023.

How much traffic does SE 86th Street over Raging River carry?

About 210 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is SE 86th Street over Raging River?

The structure is 243 ft (74.1 m) long with a longest span of 130 ft (39.6 m) and a deck 30 ft wide.

Who owns SE 86th Street over Raging River?

It is owned by the County Highway Agency.