US Bridges

Front ST N. over E.Fk.Issaquah Ck.

Fair

King County, Washington · 0.3 MI S of I-90 · Structure no. 085466000000000

Built
1970
55 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete
Length
41 ft
1 main span
Daily traffic
30,000
2018 count
Owner
City
City or Municipal Highway Agency

About this bridge

Front ST N. over E.Fk.Issaquah Ck. is a concrete slab carrying Front ST N. over E.Fk.Issaquah Ck. in King County, Washington. It was built in 1970, so it is 55 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 30,000 vehicles a day, roughly 6% of them trucks, projected to reach 34,000 by 2038. The structure is 41 ft (12.5 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFront ST N.
CrossesE.Fk.Issaquah Ck.
Location0.3 MI S of I-90
RouteCity Street 590
CountyKing County
StateWashington
Coordinates47.53536, -122.03642
Functional classUrban Other Principal 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.2 US tons
Inventory rating30.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length41 ft (12.5 m)
Longest span40 ft (12.2 m)
Deck width55 ft (16.9 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,000 (2018)
Projected traffic34,000 by 2038
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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$1.8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Front ST N. over E.Fk.Issaquah Ck. built?

It was built in 1970, making it 55 years old in 2025.

What condition is Front ST N. over E.Fk.Issaquah Ck. 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 September 2023.

How much traffic does Front ST N. over E.Fk.Issaquah Ck. carry?

About 30,000 vehicles per day (2018 count), of which roughly 6% are trucks.

How long is Front ST N. over E.Fk.Issaquah Ck.?

The structure is 41 ft (12.5 m) long with a longest span of 40 ft (12.2 m) and a deck 55 ft wide.

Who owns Front ST N. over E.Fk.Issaquah Ck.?

It is owned by the City or Municipal Highway Agency.