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  • Derelict or outdated pipeline recovery and safe removal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

Cold Bay Dock Demolition

Client: State of Alaska
Location: Cold Bay

When a marine facility needed to replace deteriorated steel support piles beneath an active dock, Enviro-Tech Diving mobilized commercial divers and marine construction support personnel...

Water Tower Pipe Refitting

Client: WA State Municipality
Location: WA State Peninsula

A municipal water utility on Washington’s Olympic Peninsula required a new vertical pipeline extension inside an existing water storage tower to improve system reliability. Working...

Pre-Inspection UAV Survey

Client: Seafood Processing Plant
Location: Bristol Bay

In the remote and dynamic environment of Bristol Bay, a new waterfront plant development required precise planning and early-stage visibility to ensure successful construction in...

Level 1 Pile Inspection & Follow-Up – Tacoma, Washington

Client: Local Seafood Processor
Location: Tacoma

Marine infrastructure is constantly exposed to a challenging environment. Tides, vessel traffic, weather, and biological growth all contribute to gradual wear on docks and pilings....