US Bridges

SR 501 over Flushing Channel

Good

Clark County, Washington · 5.3 N JCT I-5 · Structure no. 002000680000000

Built
1990
35 years old
Condition
Good
inspected December 2024
Type
Culvert
Concrete
Length
27 ft
2 main spans
Daily traffic
950
2016 count
Owner
City
City or Municipal Highway Agency

About this bridge

SR 501 over Flushing Channel is a concrete culvert carrying SR 501 over Flushing Channel in Clark County, Washington. It was built in 1990, so it is 35 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 950 vehicles a day, roughly 25% of them trucks, projected to reach 1,500 by 2036. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 98.8 mi (159 km).

CarriesSR 501
CrossesFlushing Channel
Location5.3 N JCT I-5
RouteState Highway 501
Coordinates45.67, -122.74333
Functional classUrban 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
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 15
Structure length27 ft (8.2 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic950 (2016)
Projected traffic1,500 by 2036
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$462,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 501 over Flushing Channel built?

It was built in 1990, making it 35 years old in 2025.

What condition is SR 501 over Flushing Channel 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 December 2024.

How much traffic does SR 501 over Flushing Channel carry?

About 950 vehicles per day (2016 count), of which roughly 25% are trucks.

How long is SR 501 over Flushing Channel?

The structure is 27 ft (8.2 m) long with a longest span of 12 ft (3.7 m).

Who owns SR 501 over Flushing Channel?

It is owned by the City or Municipal Highway Agency.