US Bridges

US 12 over Lake CR

Fair

Lewis County, Washington · 18.4 E JCT SR 131 · Structure no. 0007117A0000000

Built
1963
62 years old
Condition
Fair
inspected October 2023
Type
Tee Beam
Concrete Continuous
Length
84 ft
3 main spans
Daily traffic
2,666
2023 count
Owner
State
State Highway Agency

About this bridge

US 12 over Lake CR is a concrete continuous tee beam carrying US 12 over Lake CR in Lewis County, Washington. It was built in 1963, so it is 62 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 2,666 vehicles a day, roughly 15% of them trucks, projected to reach 3,253 by 2039. The structure is 84 ft (25.6 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS 12
CrossesLake CR
Location18.4 E JCT SR 131
RouteU.S. Route 12
CountyLewis County
StateWashington
Coordinates46.63343, -121.64256
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
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 rating36.8 US tons
Inventory rating28.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length84 ft (25.6 m)
Longest span60 ft (18.3 m)
Deck width40 ft (12.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,666 (2023)
Projected traffic3,253 by 2039
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$1.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 12 over Lake CR built?

It was built in 1963, making it 62 years old in 2025.

What condition is US 12 over Lake 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 October 2023.

How much traffic does US 12 over Lake CR carry?

About 2,666 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is US 12 over Lake CR?

The structure is 84 ft (25.6 m) long with a longest span of 60 ft (18.3 m) and a deck 40 ft wide.

Who owns US 12 over Lake CR?

It is owned by the State Highway Agency.