US Bridges

US 12 over Snake River & Bnrr

Fair

Franklin County, Washington · 2.9 E JCT I-182 · Structure no. 0003762A0000000

Built
1950
75 years old, rebuilt 1988
Condition
Fair
inspected April 2024
Type
Truss - Thru
Steel Continuous
Length
1,770 ft
3 main spans
Daily traffic
13,260
2023 count
Owner
State
State Highway Agency

About this bridge

US 12 over Snake River & Bnrr is a steel continuous truss - thru carrying US 12 over Snake River & Bnrr in Franklin County, Washington. It was built in 1950 and reconstructed in 1988, so it is 75 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 13,260 vehicles a day, roughly 18% of them trucks, projected to reach 16,539 by 2039. The structure is 1,770 ft (539.5 m) long and 34 ft wide. If it were closed, the detour would be 80.2 mi (129 km).

Location

Open in Google Maps
CarriesUS 12
CrossesSnake River & Bnrr
Location2.9 E JCT I-182
RouteU.S. Route 12
CountyFranklin County
StateWashington
Coordinates46.21764, -119.025
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 rating48.9 US tons
Inventory rating30 US tons

Structure

Structure typeTruss - Thru
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+10 approach)
Design loadHS 20
Structure length1,770 ft (539.5 m)
Longest span425 ft (129.5 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deck16 ft (5 m)

Traffic and service

Average daily traffic13,260 (2023)
Projected traffic16,539 by 2039
Trucks18%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed80.2 mi (129 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$36.2 million (2022 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was US 12 over Snake River & Bnrr built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1988.

What condition is US 12 over Snake River & Bnrr 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 April 2024.

How much traffic does US 12 over Snake River & Bnrr carry?

About 13,260 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is US 12 over Snake River & Bnrr?

The structure is 1,770 ft (539.5 m) long with a longest span of 425 ft (129.5 m) and a deck 34 ft wide.

Who owns US 12 over Snake River & Bnrr?

It is owned by the State Highway Agency.