US Bridges

SR 155 over Omak CR

Fair

Okanogan County, Washington · 50.5 N Douglas CO · Structure no. 0008186A0000000

Built
1967
58 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
95 ft
3 main spans
Daily traffic
2,399
2023 count
Owner
State
State Highway Agency

About this bridge

SR 155 over Omak CR is a concrete continuous slab carrying SR 155 over Omak CR in Okanogan County, Washington. It was built in 1967, so it is 58 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 5 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 2,399 vehicles a day, roughly 8% of them trucks, projected to reach 3,052 by 2039. The structure is 95 ft (29 m) long and 41 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesSR 155
CrossesOmak CR
Location50.5 N Douglas CO
RouteState Highway 155
CountyOkanogan County
StateWashington
Coordinates48.40243, -119.50333
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
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 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 rating51 US tons
Inventory rating39.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length95 ft (29 m)
Longest span39 ft (12 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,399 (2023)
Projected traffic3,052 by 2039
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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$1.8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 155 over Omak CR built?

It was built in 1967, making it 58 years old in 2025.

What condition is SR 155 over Omak CR 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 SR 155 over Omak CR carry?

About 2,399 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SR 155 over Omak CR?

The structure is 95 ft (29 m) long with a longest span of 39 ft (12 m) and a deck 41 ft wide.

Who owns SR 155 over Omak CR?

It is owned by the State Highway Agency.