US Bridges

Skyrocket RD over Whetstone Creek

GoodPosted for load

Walla Walla County, Washington · 00.54N SR 124 · Structure no. 085935000000000

Built
1992
33 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
40
2020 count
Owner
County
County Highway Agency

About this bridge

Skyrocket RD over Whetstone Creek is a prestressed concrete stringer/multi-beam or girder carrying Skyrocket RD over Whetstone Creek in Walla Walla County, Washington. It was built in 1992, so it is 33 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: posted for load restriction.

It carries about 40 vehicles a day, roughly 5% of them trucks, projected to reach 45 by 2040. The structure is 65 ft (19.8 m) long and 34 ft wide. If it were closed, the detour would be 18 mi (29 km).

CarriesSkyrocket RD
CrossesWhetstone Creek
Location00.54N SR 124
RouteCounty Highway 46110
Coordinates46.30756, -118.31464
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating19.3 US tons
Inventory rating15 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span62 ft (19 m)
Deck width34 ft (10.3 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2020)
Projected traffic45 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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$2.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Skyrocket RD over Whetstone Creek built?

It was built in 1992, making it 33 years old in 2025.

What condition is Skyrocket RD over Whetstone 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 September 2023.

How much traffic does Skyrocket RD over Whetstone Creek carry?

About 40 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Skyrocket RD over Whetstone Creek?

The structure is 65 ft (19.8 m) long with a longest span of 62 ft (19 m) and a deck 34 ft wide.

Who owns Skyrocket RD over Whetstone Creek?

It is owned by the County Highway Agency.