Pipeline Installation & Repair

Our experienced commercial diving team specializes in underwater pipeline construction, dredging, and repair for intakes and LP discharges.

What We Offer

Intake & Discharge Installations

  • Sleds and multiport diffusers
  • Cross bracing and structural pipe stands
  • Jetting and excavation for pipeline burial and protection
  • Cathodic protection and sacrificial anode installation

Pipeline Construction & Welding

  • Steel and concrete-coated pipeline installation
  • On-site welding to meet custom layouts
  • Derelict or outdated pipeline recovery and safe removal

HDPE Pipeline Solutions

High-density polyethylene (HDPE) pipelines are a preferred solution for many marine applications due to their flexibility and durability. Our trained team offers:

  • Certified HDPE fusion welding
  • Slip ring and gasket replacement
  • Patching, sealing, and structural repairs
  • Helix anchor installation to ensure long-term stability

Pipeline Inspections via ROV

Using advanced Remotely Operated Vehicle (ROV) technology, we provide thorough, real-time inspections of underwater pipelines, including:

  • GPS mapping and geolocation
  • Anode and weld inspection
  • Visual damage assessment and video documentation
  • Mixing zone inspections

Comprehensive Services from Shore to Seafloor

We understand the vital role marine pipelines play in environmental systems, industrial facilities, and municipal infrastructure. Whether it’s a new installation, an emergency repair, or routine maintenance, Enviro-Tech Diving delivers the expertise and tools to get the job done right.

Related Projects

Emergency Storm Response & Patching Project — Lakewood, Washington

Client: Lakewood Parks
Location: Lakewood, WA

During a period of severe winter storms impacting the Puget Sound region, Enviro-Tech Diving, Inc. was dispatched on emergency storm response for an urgent infrastructure...

Seattle Vessel Salvage & Recovery

Location: Seattle, WA

Recently, our dive team was called in to assist with the recovery of a derelict vessel that had sunk in Seattle waters. The vessel presented...

Emergency Vehicle Recovery In South Lake Union

Client: City of Seattle
Location: Seattle, WA

Van Recovered from Lake Union: Fast Emergency Dive Response by Enviro-Tech Diving Emergency Vehicle Salvage and Recovery in Lake Union by Enviro-Tech Diving On June...

Derelict Vessel Removal and Disposal

Client: State of Washington
Location: Washington State

Safeguarding Marine Environments by Safely Removing Derelict Vessels and Hazardous Debris In Washington State, derelict vessels pose significant environmental hazards, blocking shipping routes, damaging marine...