US Bridges

Road over S Fk Snoqualmie River

Good

King County, Washington · 2 MI NE of 58/9035 JCT · Structure no. 060505000003173

Built
2004
21 years old
Condition
Good
inspected August 2023
Type
Truss - Thru
Steel
Length
126 ft
1 main span
Daily traffic
232
1993 count
Owner
Federal
U.S. Forest Service

About this bridge

Road over S Fk Snoqualmie River is a steel truss - thru carrying Road over S Fk Snoqualmie River in King County, Washington. It was built in 2004, so it is 21 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 232 vehicles a day, roughly 20% of them trucks, projected to reach 348 by 2045. The structure is 126 ft (38.4 m) long and 29 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesRoad
CrossesS Fk Snoqualmie River
Location2 MI NE of 58/9035 JCT
RouteFederal Lands Road 58000
Coordinates47.40626, -121.44342
Functional classRural Local

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating75.1 US tons
Inventory rating45.1 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 25 or greater
Structure length126 ft (38.4 m)
Longest span125 ft (38 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic232 (1993)
Projected traffic348 by 2045
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Road over S Fk Snoqualmie River built?

It was built in 2004, making it 21 years old in 2025.

What condition is Road over S Fk Snoqualmie River 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 August 2023.

How much traffic does Road over S Fk Snoqualmie River carry?

About 232 vehicles per day (1993 count), of which roughly 20% are trucks.

How long is Road over S Fk Snoqualmie River?

The structure is 126 ft (38.4 m) long with a longest span of 125 ft (38 m) and a deck 29 ft wide.

Who owns Road over S Fk Snoqualmie River?

It is owned by the U.S. Forest Service.