US Bridges

Kopachuck DR NW over Henderson Bay Inlet

Good

Pierce County, Washington · 5.5 W JCT SR 16 · Structure no. 086498000000000

Built
2000
25 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
223 ft
2 main spans
Daily traffic
2,275
2020 count
Owner
County
County Highway Agency

About this bridge

Kopachuck DR NW over Henderson Bay Inlet is a prestressed concrete continuous stringer/multi-beam or girder carrying Kopachuck DR NW over Henderson Bay Inlet in Pierce County, Washington. It was built in 2000, so it is 25 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,275 vehicles a day, roughly 5% of them trucks, projected to reach 3,750 by 2041. The structure is 223 ft (68.1 m) long and 43 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesKopachuck DR NW
CrossesHenderson Bay Inlet
Location5.5 W JCT SR 16
RouteCounty Highway 27010
Coordinates47.32211, -122.66028
Functional classUrban Minor 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating103 US tons
Inventory rating61 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length223 ft (68.1 m)
Longest span108 ft (32.9 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,275 (2020)
Projected traffic3,750 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$7.1 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Kopachuck DR NW over Henderson Bay Inlet built?

It was built in 2000, making it 25 years old in 2025.

What condition is Kopachuck DR NW over Henderson Bay Inlet 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 July 2024.

How much traffic does Kopachuck DR NW over Henderson Bay Inlet carry?

About 2,275 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Kopachuck DR NW over Henderson Bay Inlet?

The structure is 223 ft (68.1 m) long with a longest span of 108 ft (32.9 m) and a deck 43 ft wide.

Who owns Kopachuck DR NW over Henderson Bay Inlet?

It is owned by the County Highway Agency.