US Bridges

Old Milton HWY over Yellowhawk Creek

Good

Walla Walla County, Washington · 0.06 W Peppers RD · Structure no. 085734000000000

Built
1990
35 years old
Condition
Good
inspected September 2023
Type
Tee Beam
Concrete Continuous
Length
80 ft
1 main span
Daily traffic
2,750
2021 count
Owner
County
County Highway Agency

About this bridge

Old Milton HWY over Yellowhawk Creek is a concrete continuous tee beam carrying Old Milton HWY over Yellowhawk Creek in Walla Walla County, Washington. It was built in 1990, so it is 35 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 2,750 vehicles a day, roughly 5% of them trucks, projected to reach 5,000 by 2043. The structure is 80 ft (24.4 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesOld Milton HWY
CrossesYellowhawk Creek
Location0.06 W Peppers RD
RouteCounty Highway 92570
Coordinates46.02389, -118.38492
Functional classUrban Minor Arterial

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 protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.1 US tons
Inventory rating19.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckOther
Main spans1
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span74 ft (22.6 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,750 (2021)
Projected traffic5,000 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 statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Old Milton HWY over Yellowhawk Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is Old Milton HWY over Yellowhawk 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 Old Milton HWY over Yellowhawk Creek carry?

About 2,750 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Old Milton HWY over Yellowhawk Creek?

The structure is 80 ft (24.4 m) long with a longest span of 74 ft (22.6 m) and a deck 39 ft wide.

Who owns Old Milton HWY over Yellowhawk Creek?

It is owned by the County Highway Agency.