US Bridges

Old Cascade HWY over Martin Ceek

Fair

King County, Washington · 0.2 MI S of SR-2 · Structure no. 088746000000000

Built
1959
66 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Concrete Continuous
Length
95 ft
3 main spans
Daily traffic
60
2023 count
Owner
County
County Highway Agency

About this bridge

Old Cascade HWY over Martin Ceek is a concrete continuous stringer/multi-beam or girder carrying Old Cascade HWY over Martin Ceek in King County, Washington. It was built in 1959, so it is 66 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 60 vehicles a day, projected to reach 90 by 2043. The structure is 95 ft (29 m) long and 16 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesOld Cascade HWY
CrossesMartin Ceek
Location0.2 MI S of SR-2
RouteCounty Highway 89964
CountyKing County
StateWashington
Coordinates47.71873, -121.20921
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating42.9 US tons
Inventory rating32.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length95 ft (29 m)
Longest span65 ft (19.8 m)
Deck width16 ft (5 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2023)
Projected traffic90 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.8 mi (11 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$2.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Old Cascade HWY over Martin Ceek built?

It was built in 1959, making it 66 years old in 2025.

What condition is Old Cascade HWY over Martin Ceek 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 July 2023.

How much traffic does Old Cascade HWY over Martin Ceek carry?

About 60 vehicles per day (2023 count).

How long is Old Cascade HWY over Martin Ceek?

The structure is 95 ft (29 m) long with a longest span of 65 ft (19.8 m) and a deck 16 ft wide.

Who owns Old Cascade HWY over Martin Ceek?

It is owned by the County Highway Agency.