US Bridges

SR 125 over Mill CR

Good

Walla Walla County, Washington · 5.6 N Oregon · Structure no. 0002174A0000000

Built
1936
89 years old
Condition
Good
inspected May 2023
Type
Tee Beam
Concrete
Length
59 ft
1 main span
Daily traffic
6,477
2023 count
Owner
State
State Highway Agency

About this bridge

SR 125 over Mill CR is a concrete tee beam carrying SR 125 over Mill CR in Walla Walla County, Washington. It was built in 1936, so it is 89 years old, older 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 6,477 vehicles a day, roughly 5% of them trucks, projected to reach 7,385 by 2039. The structure is 59 ft (18 m) long and 52 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesSR 125
CrossesMill CR
Location5.6 N Oregon
RouteState Highway 125
Coordinates46.0658, -118.34992
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.5 US tons
Inventory rating28.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length59 ft (18 m)
Longest span53 ft (16.2 m)
Deck width52 ft (15.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,477 (2023)
Projected traffic7,385 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 125 over Mill CR built?

It was built in 1936, making it 89 years old in 2025.

What condition is SR 125 over Mill CR 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 May 2023.

How much traffic does SR 125 over Mill CR carry?

About 6,477 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is SR 125 over Mill CR?

The structure is 59 ft (18 m) long with a longest span of 53 ft (16.2 m) and a deck 52 ft wide.

Who owns SR 125 over Mill CR?

It is owned by the State Highway Agency.