US Bridges

Prairie Road over Friday Creek

Fair

Skagit County, Washington · 0.17 MI E of Old HWY 99 · Structure no. 080245000000000

Built
1975
50 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
78 ft
1 main span
Daily traffic
2,757
2021 count
Owner
County
County Highway Agency

About this bridge

Prairie Road over Friday Creek is a prestressed concrete stringer/multi-beam or girder carrying Prairie Road over Friday Creek in Skagit County, Washington. It was built in 1975, so it is 50 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 2,757 vehicles a day, roughly 9% of them trucks, projected to reach 4,097 by 2041. The structure is 78 ft (23.8 m) long and 30 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesPrairie Road
CrossesFriday Creek
Location0.17 MI E of Old HWY 99
RouteCounty Highway 50000
CountySkagit County
StateWashington
Coordinates48.55858, -122.32853
Functional classRural Major Collector

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 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 evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating73.2 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length78 ft (23.8 m)
Longest span75 ft (22.9 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,757 (2021)
Projected traffic4,097 by 2041
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Prairie Road over Friday Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Prairie Road over Friday Creek 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 Prairie Road over Friday Creek carry?

About 2,757 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is Prairie Road over Friday Creek?

The structure is 78 ft (23.8 m) long with a longest span of 75 ft (22.9 m) and a deck 30 ft wide.

Who owns Prairie Road over Friday Creek?

It is owned by the County Highway Agency.