US Bridges

RD No. 49 over N Fork Sauk River

Good

Snohomish County, Washington · M.P. 7.2 Rd. No. 49 · Structure no. 060502000001401

Built
1960
65 years old
Condition
Good
inspected March 2025
Type
Frame
Concrete Continuous
Length
80 ft
3 main spans
Daily traffic
23
1980 count
Owner
Federal
U.S. Forest Service

About this bridge

RD No. 49 over N Fork Sauk River is a concrete continuous frame carrying RD No. 49 over N Fork Sauk River in Snohomish County, Washington. It was built in 1960, so it is 65 years old, older 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 23 vehicles a day, projected to reach 34 by 2045. The structure is 80 ft (24.4 m) long and 18 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesRD No. 49
CrossesN Fork Sauk River
LocationM.P. 7.2 Rd. No. 49
RouteFederal Lands Road 49000
Coordinates48.05808, -121.29058
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2025
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 alignment8: Equal to present desirable criteria
Operating rating56.9 US tons
Inventory rating34.1 US tons

Structure

Structure typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadOther
Structure length80 ft (24.4 m)
Longest span50 ft (15.2 m)
Deck width18 ft (5.6 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23 (1980)
Projected traffic34 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 RD No. 49 over N Fork Sauk River built?

It was built in 1960, making it 65 years old in 2025.

What condition is RD No. 49 over N Fork Sauk 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 March 2025.

How much traffic does RD No. 49 over N Fork Sauk River carry?

About 23 vehicles per day (1980 count).

How long is RD No. 49 over N Fork Sauk River?

The structure is 80 ft (24.4 m) long with a longest span of 50 ft (15.2 m) and a deck 18 ft wide.

Who owns RD No. 49 over N Fork Sauk River?

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