US Bridges

Cousins Road over Unnamed Tributary

Good

Lewis County, Washington · 3.8 S SR6 · Structure no. 089295000000000

Built
2021
4 years old
Condition
Good
inspected November 2023
Type
Slab
Concrete
Length
45 ft
1 main span
Daily traffic
168
2021 count
Owner
County
County Highway Agency

About this bridge

Cousins Road over Unnamed Tributary is a concrete slab carrying Cousins Road over Unnamed Tributary in Lewis County, Washington. It was built in 2021, so it is 4 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 168 vehicles a day, roughly 17% of them trucks, projected to reach 304 by 2041. The structure is 45 ft (13.7 m) long and 32 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCousins Road
CrossesUnnamed Tributary
Location3.8 S SR6
RouteCounty Highway 22850
CountyLewis County
StateWashington
Coordinates46.57599, -123.03401
Functional classRural Local

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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.1 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length45 ft (13.7 m)
Longest span39 ft (11.8 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic168 (2021)
Projected traffic304 by 2041
Trucks17%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$684,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cousins Road over Unnamed Tributary built?

It was built in 2021, making it 4 years old in 2025.

What condition is Cousins Road over Unnamed Tributary 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 November 2023.

How much traffic does Cousins Road over Unnamed Tributary carry?

About 168 vehicles per day (2021 count), of which roughly 17% are trucks.

How long is Cousins Road over Unnamed Tributary?

The structure is 45 ft (13.7 m) long with a longest span of 39 ft (11.8 m) and a deck 32 ft wide.

Who owns Cousins Road over Unnamed Tributary?

It is owned by the County Highway Agency.