US Bridges

Rd. No. 25 over Suiattle River

Fair

Skagit County, Washington · M.P. 0.1 Rd. No. 25 · Structure no. 060502000001450

Built
1959
66 years old
Condition
Fair
inspected September 2023
Type
Frame
Concrete Continuous
Length
240 ft
3 main spans
Daily traffic
24
1992 count
Owner
Federal
U.S. Forest Service

About this bridge

Rd. No. 25 over Suiattle River is a concrete continuous frame carrying Rd. No. 25 over Suiattle River in Skagit County, Washington. It was built in 1959, so it is 66 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 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 24 vehicles a day, projected to reach 36 by 2045. The structure is 240 ft (73.2 m) long and 17 ft wide. If it were closed, the detour would be 44.7 mi (72 km).

Location

Open in Google Maps
CarriesRd. No. 25
CrossesSuiattle River
LocationM.P. 0.1 Rd. No. 25
RouteFederal Lands Road 25000
CountySkagit County
StateWashington
Coordinates48.30185, -121.41794
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating44.1 US tons
Inventory rating26 US tons

Structure

Structure typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length240 ft (73.2 m)
Longest span150 ft (45.7 m)
Deck width17 ft (5.3 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24 (1992)
Projected traffic36 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed44.7 mi (72 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. 25 over Suiattle River built?

It was built in 1959, making it 66 years old in 2025.

What condition is Rd. No. 25 over Suiattle 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 September 2023.

How much traffic does Rd. No. 25 over Suiattle River carry?

About 24 vehicles per day (1992 count).

How long is Rd. No. 25 over Suiattle River?

The structure is 240 ft (73.2 m) long with a longest span of 150 ft (45.7 m) and a deck 17 ft wide.

Who owns Rd. No. 25 over Suiattle River?

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