Lower water feature (Sebco) at Nike World Campus, Beaverton, Oregon with twenty stair step weirs and 39 stepped pools in background. Looking down 39 stepped pools, each of which flows water off to the left and to the pool below. In-ground plumbing that serves the 39 pools. Strainers, pumps, and 8” discharge manifold that move water to stair steps and pools at the rate of 2,000 gallons per minute. Installing in-ground equipment and surge tank vaults. Pumping, filtering and sanitizing equipment.