US Bridges

Biscuit Ridge RD over Dry Creek

Good

Walla Walla County, Washington · 6.057 MI South of SR 12 · Structure no. 089008000000000

Built
2018
7 years old
Condition
Good
inspected September 2023
Type
Slab
Concrete
Length
60 ft
1 main span
Daily traffic
45
2021 count
Owner
County
County Highway Agency

About this bridge

Biscuit Ridge RD over Dry Creek is a concrete slab carrying Biscuit Ridge RD over Dry Creek in Walla Walla County, Washington. It was built in 2018, so it is 7 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.

It carries about 45 vehicles a day, roughly 10% of them trucks, projected to reach 50 by 2043. The structure is 60 ft (18.3 m) long and 36 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesBiscuit Ridge RD
CrossesDry Creek
Location6.057 MI South of SR 12
RouteCounty Highway 75470
Coordinates46.09477, -118.08019
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
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 statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.3 US tons
Inventory rating49.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckOther
Main spans1
Design loadHL 93
Structure length60 ft (18.3 m)
Longest span58 ft (17.7 m)
Deck width36 ft (11.1 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2021)
Projected traffic50 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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$2.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Biscuit Ridge RD over Dry Creek built?

It was built in 2018, making it 7 years old in 2025.

What condition is Biscuit Ridge RD over Dry 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 Biscuit Ridge RD over Dry Creek carry?

About 45 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is Biscuit Ridge RD over Dry Creek?

The structure is 60 ft (18.3 m) long with a longest span of 58 ft (17.7 m) and a deck 36 ft wide.

Who owns Biscuit Ridge RD over Dry Creek?

It is owned by the County Highway Agency.