US Bridges

US 12 over Pacific P L Tailrace

Fair

Yakima County, Washington · 7.5 E JCT SR 410 · Structure no. 0008604A0000000

Built
1969
56 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
110 ft
3 main spans
Daily traffic
5,794
2023 count
Owner
State
State Highway Agency

About this bridge

US 12 over Pacific P L Tailrace is a concrete continuous slab carrying US 12 over Pacific P L Tailrace in Yakima County, Washington. It was built in 1969, so it is 56 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 6 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 5,794 vehicles a day, roughly 11% of them trucks, projected to reach 7,533 by 2039. The structure is 110 ft (33.5 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 12
CrossesPacific P L Tailrace
Location7.5 E JCT SR 410
RouteU.S. Route 12
CountyYakima County
StateWashington
Coordinates46.69625, -120.65446
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
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 within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.5 US tons
Inventory rating25 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length110 ft (33.5 m)
Longest span42 ft (12.8 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,794 (2023)
Projected traffic7,533 by 2039
Trucks11%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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$2.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 12 over Pacific P L Tailrace built?

It was built in 1969, making it 56 years old in 2025.

What condition is US 12 over Pacific P L Tailrace 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 US 12 over Pacific P L Tailrace carry?

About 5,794 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is US 12 over Pacific P L Tailrace?

The structure is 110 ft (33.5 m) long with a longest span of 42 ft (12.8 m) and a deck 41 ft wide.

Who owns US 12 over Pacific P L Tailrace?

It is owned by the State Highway Agency.