US Bridges

Middle Waitsburg over Dry Creek

Good

Walla Walla County, Washington · 0.2 MI South of Smith RD · Structure no. 086821000000000

Built
2002
23 years old
Condition
Good
inspected September 2024
Type
Tee Beam
Prestressed Concrete Continuous
Length
85 ft
1 main span
Daily traffic
400
2024 count
Owner
County
County Highway Agency

About this bridge

Middle Waitsburg over Dry Creek is a prestressed concrete continuous tee beam carrying Middle Waitsburg over Dry Creek in Walla Walla County, Washington. It was built in 2002, so it is 23 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 400 vehicles a day, roughly 5% of them trucks, projected to reach 600 by 2046. The structure is 85 ft (25.8 m) long and 35 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesMiddle Waitsburg
CrossesDry Creek
Location0.2 MI South of Smith RD
RouteCounty Highway 96230
Coordinates46.13372, -118.26653
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 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.4 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckOther
Main spans1
Design loadHS 25 or greater
Structure length85 ft (25.8 m)
Longest span84 ft (25.6 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2024)
Projected traffic600 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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$3.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Middle Waitsburg over Dry Creek built?

It was built in 2002, making it 23 years old in 2025.

What condition is Middle Waitsburg 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 2024.

How much traffic does Middle Waitsburg over Dry Creek carry?

About 400 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Middle Waitsburg over Dry Creek?

The structure is 85 ft (25.8 m) long with a longest span of 84 ft (25.6 m) and a deck 35 ft wide.

Who owns Middle Waitsburg over Dry Creek?

It is owned by the County Highway Agency.