US Bridges

Road # 6305 over Lewis Creek

Good

Snohomish County, Washington · 0.5 MI E of 63/6305 JCT · Structure no. 060506000001591

Built
1991
34 years old
Condition
Good
inspected June 2021
Type
Stringer/Multi-beam or Girder
Steel
Length
80 ft
1 main span
Daily traffic
3
1995 count
Owner
Federal
U.S. Forest Service

About this bridge

Road # 6305 over Lewis Creek is a steel stringer/multi-beam or girder carrying Road # 6305 over Lewis Creek in Snohomish County, Washington. It was built in 1991, so it is 34 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 3 vehicles a day, projected to reach 4 by 2045. The structure is 80 ft (24.4 m) long and 16 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesRoad # 6305
CrossesLewis Creek
Location0.5 MI E of 63/6305 JCT
RouteFederal Lands Road 63050
Coordinates47.82121, -121.51086
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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2021
Inspection intervalevery 48 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 alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating61.8 US tons
Inventory rating47.8 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 25 or greater
Structure length80 ft (24.4 m)
Longest span78 ft (23.8 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3 (1995)
Projected traffic4 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 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 # 6305 over Lewis Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is Road # 6305 over Lewis Creek 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 June 2021.

How much traffic does Road # 6305 over Lewis Creek carry?

About 3 vehicles per day (1995 count).

How long is Road # 6305 over Lewis Creek?

The structure is 80 ft (24.4 m) long with a longest span of 78 ft (23.8 m) and a deck 16 ft wide.

Who owns Road # 6305 over Lewis Creek?

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