US Bridges

NE Carnation Farm over Snoqualmie River

Fair

King County, Washington · 0.8 MI W of SR-203 · Structure no. 080972000000000

Built
1951
74 years old
Condition
Fair
inspected April 2023
Type
Truss - Thru
Steel
Length
330 ft
1 main span
Daily traffic
1,259
2022 count
Owner
County
County Highway Agency

About this bridge

NE Carnation Farm over Snoqualmie River is a steel truss - thru carrying NE Carnation Farm over Snoqualmie River in King County, Washington. It was built in 1951, so it is 74 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 5 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 1,259 vehicles a day, roughly 5% of them trucks, projected to reach 1,550 by 2041. The structure is 330 ft (100.6 m) long and 28 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesNE Carnation Farm
CrossesSnoqualmie River
Location0.8 MI W of SR-203
RouteCounty Highway 96806
CountyKing County
StateWashington
Coordinates47.66593, -121.92556
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating13.2 US tons
Inventory rating10 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+3 approach)
Design loadH 15
Structure length330 ft (100.6 m)
Longest span180 ft (54.9 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck15 ft (4.6 m)

Traffic and service

Average daily traffic1,259 (2022)
Projected traffic1,550 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$12.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was NE Carnation Farm over Snoqualmie River built?

It was built in 1951, making it 74 years old in 2025.

What condition is NE Carnation Farm 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 April 2023.

How much traffic does NE Carnation Farm over Snoqualmie River carry?

About 1,259 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is NE Carnation Farm over Snoqualmie River?

The structure is 330 ft (100.6 m) long with a longest span of 180 ft (54.9 m) and a deck 28 ft wide.

Who owns NE Carnation Farm over Snoqualmie River?

It is owned by the County Highway Agency.