Wastewater

Brightwater Conveyance System

A regional conveyance system including a long single-pass microtunneled marine outfall connector.

A once-in-a-generation regional wastewater programme spanning treatment, conveyance and outfall assets.

Our teams delivered the marine outfall connector — at the time the largest one-pass fiberglass microtunnel — together with shaft and station works.

Scope of work

  • Tunnels & Underground Engineering
  • Trenchless Engineering
  • Construction Management
Brightwater Conveyance System — King County, WA
Brightwater Conveyance System, King County, WA. Hoffman Tunnels provided tunnel and underground design, engineering and construction-phase support.

Project facts

Record
Largest 1-pass MT
Outfall
Marine
Programme
Regional
Completion
2011
Related work

More wastewater projects

Central InterceptorWastewater
Auckland, New Zealand2022

Central Interceptor

A 15-kilometre gravity trunk sewer and pump station network reducing overflows across central Auckland.

View project
Central Interceptor project details
Next steps

Planning something underground?

Every project starts with a conversation about your ground, your constraints, and your programme.