US Bridges

W. White Swan Road over Simco Creek

Good

Yakima County, Washington · 0.29 E of Hawk Rd. · Structure no. 089489000000000

Built
2022
3 years old
Condition
Good
inspected November 2023
Type
Slab
Concrete
Length
50 ft
1 main span
Daily traffic
530
2020 count
Owner
County
County Highway Agency

About this bridge

W. White Swan Road over Simco Creek is a concrete slab carrying W. White Swan Road over Simco Creek in Yakima County, Washington. It was built in 2022, so it is 3 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 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 530 vehicles a day, roughly 5% of them trucks, projected to reach 573 by 2043. The structure is 50 ft (15.2 m) long and 36 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesW. White Swan Road
CrossesSimco Creek
Location0.29 E of Hawk Rd.
RouteCounty Highway 55170
Coordinates46.38258, -120.76901
Functional classRural Major 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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.7 US tons
Inventory rating50.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckOther
Main spans1
Design loadHL 93
Structure length50 ft (15.2 m)
Longest span45 ft (13.7 m)
Deck width36 ft (10.9 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic530 (2020)
Projected traffic573 by 2043
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$2.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was W. White Swan Road over Simco Creek built?

It was built in 2022, making it 3 years old in 2025.

What condition is W. White Swan Road over Simco 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 November 2023.

How much traffic does W. White Swan Road over Simco Creek carry?

About 530 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is W. White Swan Road over Simco Creek?

The structure is 50 ft (15.2 m) long with a longest span of 45 ft (13.7 m) and a deck 36 ft wide.

Who owns W. White Swan Road over Simco Creek?

It is owned by the County Highway Agency.