US Bridges

Bay View-Edison RD over Big Indian Slough

Fair

Skagit County, Washington · 0.4 N JCT SR20 · Structure no. 086030000000000

Built
1992
33 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
71 ft
1 main span
Daily traffic
1,176
2021 count
Owner
County
County Highway Agency

About this bridge

Bay View-Edison RD over Big Indian Slough is a prestressed concrete stringer/multi-beam or girder carrying Bay View-Edison RD over Big Indian Slough in Skagit County, Washington. It was built in 1992, so it is 33 years old, younger 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 1,176 vehicles a day, roughly 8% of them trucks, projected to reach 1,748 by 2041. The structure is 71 ft (21.6 m) long and 37 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesBay View-Edison RD
CrossesBig Indian Slough
Location0.4 N JCT SR20
RouteCounty Highway 31210
CountySkagit County
StateWashington
Coordinates48.45058, -122.46567
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 inspectionJuly 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.2 US tons
Inventory rating46.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length71 ft (21.6 m)
Longest span70 ft (21.3 m)
Deck width37 ft (11.2 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,176 (2021)
Projected traffic1,748 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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$1.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Bay View-Edison RD over Big Indian Slough built?

It was built in 1992, making it 33 years old in 2025.

What condition is Bay View-Edison RD over Big Indian Slough 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 July 2023.

How much traffic does Bay View-Edison RD over Big Indian Slough carry?

About 1,176 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Bay View-Edison RD over Big Indian Slough?

The structure is 71 ft (21.6 m) long with a longest span of 70 ft (21.3 m) and a deck 37 ft wide.

Who owns Bay View-Edison RD over Big Indian Slough?

It is owned by the County Highway Agency.