US Bridges

Washington Way over Lake Sacajawea

Good

Cowlitz County, Washington · Between Nichols & Kessler · Structure no. 088791000000000

Built
2015
10 years old
Condition
Good
inspected March 2023
Type
Slab
Prestressed Concrete Continuous
Length
144 ft
3 main spans
Daily traffic
9,950
2013 count
Owner
City
City or Municipal Highway Agency

About this bridge

Washington Way over Lake Sacajawea is a prestressed concrete continuous slab carrying Washington Way over Lake Sacajawea in Cowlitz County, Washington. It was built in 2015, so it is 10 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 9,950 vehicles a day, roughly 5% of them trucks, projected to reach 18,000 by 2035. The structure is 144 ft (43.9 m) long and 73 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesWashington Way
CrossesLake Sacajawea
LocationBetween Nichols & Kessler
RouteCity Street 62
Coordinates46.13389, -122.95194
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating39.2 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length144 ft (43.9 m)
Longest span60 ft (18.3 m)
Deck width73 ft (22.3 m)
Roadway width57 ft (17.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,950 (2013)
Projected traffic18,000 by 2035
Trucks5%
Lanes on structure5
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$10.8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Washington Way over Lake Sacajawea built?

It was built in 2015, making it 10 years old in 2025.

What condition is Washington Way over Lake Sacajawea 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 March 2023.

How much traffic does Washington Way over Lake Sacajawea carry?

About 9,950 vehicles per day (2013 count), of which roughly 5% are trucks.

How long is Washington Way over Lake Sacajawea?

The structure is 144 ft (43.9 m) long with a longest span of 60 ft (18.3 m) and a deck 73 ft wide.

Who owns Washington Way over Lake Sacajawea?

It is owned by the City or Municipal Highway Agency.