US Bridges

N.E. Dogwood St. over E.Fk. Issaquah Ck.

Good

King County, Washington · 0.1 MI W of I-90 · Structure no. 086296000000000

Built
1996
29 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
1,200
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

N.E. Dogwood St. over E.Fk. Issaquah Ck. is a prestressed concrete stringer/multi-beam or girder carrying N.E. Dogwood St. over E.Fk. Issaquah Ck. in King County, Washington. It was built in 1996, so it is 29 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 1,200 vehicles a day, roughly 5% of them trucks, projected to reach 3,100 by 2041. The structure is 60 ft (18.3 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesN.E. Dogwood St.
CrossesE.Fk. Issaquah Ck.
Location0.1 MI W of I-90
RouteCity Street 590
Coordinates47.53396, -122.03373
Functional classUrban Collector

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 inspectionSeptember 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating25.4 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20 + Mod
Structure length60 ft (18.3 m)
Longest span58 ft (17.7 m)
Deck width36 ft (11.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2021)
Projected traffic3,100 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was N.E. Dogwood St. over E.Fk. Issaquah Ck. built?

It was built in 1996, making it 29 years old in 2025.

What condition is N.E. Dogwood St. over E.Fk. Issaquah Ck. 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 September 2023.

How much traffic does N.E. Dogwood St. over E.Fk. Issaquah Ck. carry?

About 1,200 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is N.E. Dogwood St. over E.Fk. Issaquah Ck.?

The structure is 60 ft (18.3 m) long with a longest span of 58 ft (17.7 m) and a deck 36 ft wide.

Who owns N.E. Dogwood St. over E.Fk. Issaquah Ck.?

It is owned by the City or Municipal Highway Agency.