US Bridges

Myra RD over Mill Creek

Fair

Walla Walla County, Washington · 0.22 MI N Rose ST · Structure no. 087713000000000

Built
2008
17 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
125 ft
1 main span
Daily traffic
13,345
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Myra RD over Mill Creek is a prestressed concrete stringer/multi-beam or girder carrying Myra RD over Mill Creek in Walla Walla County, Washington. It was built in 2008, so it is 17 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 13,345 vehicles a day, roughly 15% of them trucks, projected to reach 18,000 by 2043. The structure is 125 ft (38.1 m) long and 75 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMyra RD
CrossesMill Creek
Location0.22 MI N Rose ST
RouteCity Street 26930
CountyWalla Walla County
StateWashington
Coordinates46.06565, -118.37049
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
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 evaluation6: Equal to 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 rating75.9 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length125 ft (38.1 m)
Longest span121 ft (36.9 m)
Deck width75 ft (22.9 m)
Roadway width55 ft (16.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,345 (2023)
Projected traffic18,000 by 2043
Trucks15%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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$8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Myra RD over Mill Creek built?

It was built in 2008, making it 17 years old in 2025.

What condition is Myra RD over Mill Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2023.

How much traffic does Myra RD over Mill Creek carry?

About 13,345 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is Myra RD over Mill Creek?

The structure is 125 ft (38.1 m) long with a longest span of 121 ft (36.9 m) and a deck 75 ft wide.

Who owns Myra RD over Mill Creek?

It is owned by the City or Municipal Highway Agency.