US Bridges

US 12 over Johnson CR

Fair

Lewis County, Washington · 13.3 E JCT SR 131 · Structure no. 0006681B0000000

Built
1962
63 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Concrete
Length
150 ft
3 main spans
Daily traffic
2,655
2023 count
Owner
State
State Highway Agency

About this bridge

US 12 over Johnson CR is a concrete tee beam carrying US 12 over Johnson CR in Lewis County, Washington. It was built in 1962, so it is 63 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 2,655 vehicles a day, roughly 19% of them trucks, projected to reach 4,036 by 2039. The structure is 150 ft (45.7 m) long and 40 ft wide. If it were closed, the detour would be 80.8 mi (130 km).

Location

Open in Google Maps
CarriesUS 12
CrossesJohnson CR
Location13.3 E JCT SR 131
RouteU.S. Route 12
CountyLewis County
StateWashington
Coordinates46.57175, -121.69894
Functional classRural Principal Arterial - Other

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.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79 US tons
Inventory rating47 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length150 ft (45.7 m)
Longest span100 ft (30.5 m)
Deck width40 ft (12.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,655 (2023)
Projected traffic4,036 by 2039
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed80.8 mi (130 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$3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 12 over Johnson CR built?

It was built in 1962, making it 63 years old in 2025.

What condition is US 12 over Johnson CR 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 August 2023.

How much traffic does US 12 over Johnson CR carry?

About 2,655 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is US 12 over Johnson CR?

The structure is 150 ft (45.7 m) long with a longest span of 100 ft (30.5 m) and a deck 40 ft wide.

Who owns US 12 over Johnson CR?

It is owned by the State Highway Agency.