Projects / Westin St. John Reverse Osmosis Plant

Westin St. John Reverse Osmosis Plant

A ground-up desalination plant built to turn seawater into 300,000 gallons of potable water a day for the resort.

A resort on St. John cannot lean on a mainland water main. Reliable potable water has to be made on site.

This project was a ground-up reverse osmosis plant, a desalination plant that draws seawater from the ocean, treats it, and feeds the resort's potable-water system at 300,000 gallons a day.

Two things made it hard before the plant could take shape. St. John has no concrete plant of its own, so every load had to cross the water, and the plant needed deep, self-performed foundations to sit safely on hard coastal ground.

Scope

What we built

4 items of scope

Stabilis was the general contractor for the plant and self-performed its foundations.

• 01A new reverse osmosis plant designed to produce 300,000 gallons of potable water per day
• 02A seawater intake and treatment system that supplies the resort's potable-water network
• 03137 deep foundation piles, self-performed
• 04All concrete pile caps and grade beams, self-performed

Deep foundations, self-performed

Our own crews installed 137 deep foundation piles, then formed and poured all the pile caps and grade beams, anchoring the plant on hard coastal ground.

Concrete barged in daily

With no concrete plant on St. John, we moved concrete trucks and materials across by barge every day to keep the pours on schedule.

One accountable build

As general contractor, we carried the plant from the ground up, through to the intake and treatment system that turns seawater into potable water for the resort.