US Bridges

Clinton ST over Mill Creek

Fair

Walla Walla County, Washington · Clinton and Mill CR · Structure no. 085376000000000

Built
1922
103 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
51 ft
1 main span
Daily traffic
3,390
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Clinton ST over Mill Creek is a steel stringer/multi-beam or girder carrying Clinton ST over Mill Creek in Walla Walla County, Washington. It was built in 1922, so it is 103 years old, older 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 3,390 vehicles a day, roughly 5% of them trucks, projected to reach 5,900 by 2043. The structure is 51 ft (15.5 m) long and 63 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesClinton ST
CrossesMill Creek
LocationClinton and Mill CR
RouteCity Street 1365
CountyWalla Walla County
StateWashington
Coordinates46.06928, -118.32339
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27 US tons
Inventory rating20.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length51 ft (15.5 m)
Longest span51 ft (15.5 m)
Deck width63 ft (19.2 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,390 (2023)
Projected traffic5,900 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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$2.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Clinton ST over Mill Creek built?

It was built in 1922, making it 103 years old in 2025.

What condition is Clinton ST 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 Clinton ST over Mill Creek carry?

About 3,390 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Clinton ST over Mill Creek?

The structure is 51 ft (15.5 m) long with a longest span of 51 ft (15.5 m) and a deck 63 ft wide.

Who owns Clinton ST over Mill Creek?

It is owned by the City or Municipal Highway Agency.