US Bridges

Farm to Market RD over Drainage Ditch

Good

Skagit County, Washington · 0.1 N SR 20 · Structure no. 0TA1011A0000000

Built
1999
26 years old
Condition
Good
inspected April 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
54 ft
1 main span
Daily traffic
3,124
2002 count
Owner
State
State Highway Agency

About this bridge

Farm to Market RD over Drainage Ditch is a prestressed concrete stringer/multi-beam or girder carrying Farm to Market RD over Drainage Ditch in Skagit County, Washington. It was built in 1999, so it is 26 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 3,124 vehicles a day, roughly 15% of them trucks, projected to reach 5,779 by 2036. The structure is 54 ft (16.5 m) long and 66 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesFarm to Market RD
CrossesDrainage Ditch
Location0.1 N SR 20
RouteCounty Highway 20
Coordinates48.44651, -122.44391
Functional classRural Minor Arterial

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 inspectionApril 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating94 US tons
Inventory rating56 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 25 or greater
Structure length54 ft (16.5 m)
Longest span53 ft (16.2 m)
Deck width66 ft (20 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,124 (2002)
Projected traffic5,779 by 2036
Trucks15%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Farm to Market RD over Drainage Ditch built?

It was built in 1999, making it 26 years old in 2025.

What condition is Farm to Market RD over Drainage 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 April 2021.

How much traffic does Farm to Market RD over Drainage Ditch carry?

About 3,124 vehicles per day (2002 count), of which roughly 15% are trucks.

How long is Farm to Market RD over Drainage Ditch?

The structure is 54 ft (16.5 m) long with a longest span of 53 ft (16.2 m) and a deck 66 ft wide.

Who owns Farm to Market RD over Drainage Ditch?

It is owned by the State Highway Agency.