US Bridges

Rose Street over Mill Creek

Good

Walla Walla County, Washington · Rose St. and Mill Creek · Structure no. 089278000000000

Built
2021
4 years old
Condition
Good
inspected September 2023
Type
Slab
Concrete
Length
96 ft
1 main span
Daily traffic
10,500
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Rose Street over Mill Creek is a concrete slab carrying Rose Street over Mill Creek in Walla Walla County, Washington. It was built in 2021, so it is 4 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 10,500 vehicles a day, roughly 2% of them trucks, projected to reach 11,430 by 2042. The structure is 96 ft (29.3 m) long and 202 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesRose Street
CrossesMill Creek
LocationRose St. and Mill Creek
RouteCity Street 1365
CountyWalla Walla County
StateWashington
Coordinates46.06706, -118.34139
Functional classUrban Other Principal 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.
Superstructure7 GoodSome minor problems.
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 evaluation7: Better than present minimum criteria
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 rating50 US tons
Inventory rating38.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length96 ft (29.3 m)
Longest span55 ft (16.9 m)
Deck width202 ft (61.6 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,500 (2023)
Projected traffic11,430 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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$3.8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rose Street over Mill Creek built?

It was built in 2021, making it 4 years old in 2025.

What condition is Rose Street over Mill 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 Rose Street over Mill Creek carry?

About 10,500 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Rose Street over Mill Creek?

The structure is 96 ft (29.3 m) long with a longest span of 55 ft (16.9 m) and a deck 202 ft wide.

Who owns Rose Street over Mill Creek?

It is owned by the City or Municipal Highway Agency.