US Bridges

Cottonwood Canyon over Cottonwood Creek

Good

Yakima County, Washington · 00.24 E of Moore RD · Structure no. 083423000000000

Built
1975
50 years old
Condition
Good
inspected March 2023
Type
Channel Beam
Concrete
Length
23 ft
1 main span
Daily traffic
1,512
2021 count
Owner
County
County Highway Agency

About this bridge

Cottonwood Canyon over Cottonwood Creek is a concrete channel beam carrying Cottonwood Canyon over Cottonwood Creek in Yakima County, Washington. It was built in 1975, so it is 50 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,512 vehicles a day, roughly 5% of them trucks, projected to reach 1,815 by 2041. The structure is 23 ft (7 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCottonwood Canyon
CrossesCottonwood Creek
Location00.24 E of Moore RD
RouteCounty Highway 30600
Coordinates46.57855, -120.66277
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.3 US tons
Inventory rating31.1 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckOther
Main spans1
Design loadH 20
Structure length23 ft (7 m)
Longest span22 ft (6.7 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,512 (2021)
Projected traffic1,815 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cottonwood Canyon over Cottonwood Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Cottonwood Canyon over Cottonwood Creek 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 March 2023.

How much traffic does Cottonwood Canyon over Cottonwood Creek carry?

About 1,512 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Cottonwood Canyon over Cottonwood Creek?

The structure is 23 ft (7 m) long with a longest span of 22 ft (6.7 m) and a deck 32 ft wide.

Who owns Cottonwood Canyon over Cottonwood Creek?

It is owned by the County Highway Agency.