US Bridges

SR 823 over Slough & Cnty RD

Fair

Yakima County, Washington · 0.2 N JCT I-82 · Structure no. 0003209B0000000

Built
1947
78 years old
Condition
Fair
inspected October 2023
Type
Tee Beam
Concrete
Length
178 ft
4 main spans
Daily traffic
15,105
2023 count
Owner
State
State Highway Agency

About this bridge

SR 823 over Slough & Cnty RD is a concrete tee beam carrying SR 823 over Slough & Cnty RD in Yakima County, Washington. It was built in 1947, so it is 78 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 15,105 vehicles a day, roughly 5% of them trucks, projected to reach 23,933 by 2039. The structure is 178 ft (54.3 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesSR 823
CrossesSlough & Cnty RD
Location0.2 N JCT I-82
RouteState Highway 823
CountyYakima County
StateWashington
Coordinates46.63714, -120.52736
Functional classUrban Other Principal 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating42 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length178 ft (54.3 m)
Longest span56 ft (17.1 m)
Deck width36 ft (11 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,105 (2023)
Projected traffic23,933 by 2039
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

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)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 823 over Slough & Cnty RD built?

It was built in 1947, making it 78 years old in 2025.

What condition is SR 823 over Slough & Cnty RD 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 October 2023.

How much traffic does SR 823 over Slough & Cnty RD carry?

About 15,105 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is SR 823 over Slough & Cnty RD?

The structure is 178 ft (54.3 m) long with a longest span of 56 ft (17.1 m) and a deck 36 ft wide.

Who owns SR 823 over Slough & Cnty RD?

It is owned by the State Highway Agency.