US Bridges

SR 20 over Railroad

Fair

Okanogan County, Washington · 0.3 E JCT SR 215 · Structure no. 0005956B0000000

Built
1959
66 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete Continuous
Length
165 ft
3 main spans
Daily traffic
2,479
2023 count
Owner
State
State Highway Agency

About this bridge

SR 20 over Railroad is a concrete continuous slab carrying SR 20 over Railroad in Okanogan County, Washington. It was built in 1959, so it is 66 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 2,479 vehicles a day, roughly 6% of them trucks, projected to reach 2,866 by 2039. The structure is 165 ft (50.3 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesSR 20
CrossesRailroad
Location0.3 E JCT SR 215
RouteState Highway 20
CountyOkanogan County
StateWashington
Coordinates48.35161, -119.59256
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.9 US tons
Inventory rating30 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length165 ft (50.3 m)
Longest span66 ft (20.1 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,479 (2023)
Projected traffic2,866 by 2039
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.5 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 20 over Railroad built?

It was built in 1959, making it 66 years old in 2025.

What condition is SR 20 over Railroad 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 2024.

How much traffic does SR 20 over Railroad carry?

About 2,479 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is SR 20 over Railroad?

The structure is 165 ft (50.3 m) long with a longest span of 66 ft (20.1 m) and a deck 32 ft wide.

Who owns SR 20 over Railroad?

It is owned by the State Highway Agency.