US Bridges

Crescent Lake Rd. over Snoqualmie River

Fair

Snohomish County, Washington · 1.3 W JCT SR 203 · Structure no. 086223000000000

Built
1996
29 years old
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
426 ft
2 main spans
Daily traffic
2,421
2023 count
Owner
County
County Highway Agency

About this bridge

Crescent Lake Rd. over Snoqualmie River is a prestressed concrete continuous box beam or girders - single or spread carrying Crescent Lake Rd. over Snoqualmie River in Snohomish 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 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 2,421 vehicles a day, roughly 15% of them trucks, projected to reach 4,000 by 2042. The structure is 426 ft (129.8 m) long and 37 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesCrescent Lake Rd.
CrossesSnoqualmie River
Location1.3 W JCT SR 203
RouteCounty Highway 92555
CountySnohomish County
StateWashington
Coordinates47.80346, -122.00343
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating79 US tons
Inventory rating41 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2 (+1 approach)
Design loadHS 25 or greater
Structure length426 ft (129.8 m)
Longest span235 ft (71.6 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,421 (2023)
Projected traffic4,000 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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$15.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Crescent Lake Rd. over Snoqualmie River built?

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

What condition is Crescent Lake Rd. over Snoqualmie River 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 May 2024.

How much traffic does Crescent Lake Rd. over Snoqualmie River carry?

About 2,421 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is Crescent Lake Rd. over Snoqualmie River?

The structure is 426 ft (129.8 m) long with a longest span of 235 ft (71.6 m) and a deck 37 ft wide.

Who owns Crescent Lake Rd. over Snoqualmie River?

It is owned by the County Highway Agency.