US Bridges

Cook Road over DD#14 Ditch

Good

Skagit County, Washington · 0.5 E JCT Interstate 5 · Structure no. 086553000000000

Built
2000
25 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
37 ft
1 main span
Daily traffic
16,617
2023 count
Owner
County
County Highway Agency

About this bridge

Cook Road over DD#14 Ditch is a prestressed concrete stringer/multi-beam or girder carrying Cook Road over DD#14 Ditch in Skagit County, Washington. It was built in 2000, so it is 25 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 16,617 vehicles a day, roughly 9% of them trucks, projected to reach 30,012 by 2043. The structure is 37 ft (11.4 m) long and 43 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesCook Road
CrossesDD#14 Ditch
Location0.5 E JCT Interstate 5
RouteCounty Highway 63000
Coordinates48.50758, -122.32789
Functional classRural Major Collector

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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.9 US tons
Inventory rating29 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 25 or greater
Structure length37 ft (11.4 m)
Longest span34 ft (10.5 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,617 (2023)
Projected traffic30,012 by 2043
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$748,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cook Road over DD#14 Ditch built?

It was built in 2000, making it 25 years old in 2025.

What condition is Cook Road over DD#14 Ditch 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 Cook Road over DD#14 Ditch carry?

About 16,617 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Cook Road over DD#14 Ditch?

The structure is 37 ft (11.4 m) long with a longest span of 34 ft (10.5 m) and a deck 43 ft wide.

Who owns Cook Road over DD#14 Ditch?

It is owned by the County Highway Agency.