US Bridges

Rd. No. 25 over Suiattle River

Good

Skagit County, Washington · M.P. 0.06 Rd. No. 25 · Structure no. 060502000003335

Built
2009
16 years old
Condition
Good
inspected September 2023
Type
Truss - Thru
Steel
Length
316 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Rd. No. 25 over Suiattle River is a steel truss - thru carrying Rd. No. 25 over Suiattle River in Skagit County, Washington. It was built in 2009, so it is 16 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 316 ft (96.3 m) long and 13 ft wide. If it were closed, the detour would be 44.7 mi (72 km).

CarriesRd. No. 25
CrossesSuiattle River
LocationM.P. 0.06 Rd. No. 25
RouteFederal Lands Road 25000
Coordinates48.30157, -121.41826
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 inspectionSeptember 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating71 US tons
Inventory rating42.5 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckSteel plate
Main spans1 (+8 approach)
Design loadHS 20
Structure length316 ft (96.3 m)
Longest span210 ft (64 m)
Deck width13 ft (4.1 m)
Roadway width13 ft (4.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 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 2009, making it 16 years old in 2025.

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

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

About 50 vehicles per day (latest count).

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

The structure is 316 ft (96.3 m) long with a longest span of 210 ft (64 m) and a deck 13 ft wide.

Who owns Rd. No. 25 over Suiattle River?

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