Lakeview Water Treatment Plant Low Lift Pump Station

The new Low-Lift Pump Station at Lakeview Water Treatment Plant is designed around 3-600 hp and 2-500 hp 4.16 KV pumps that candeliver 927 MlL/d of water to the filtration process. The facility includes 2 travelling screens, new HVAC equipment, electrical distribution equipment, and SCADA equipment.

The discharge of the pumps is through stainless steel interior piping and 2-2100 mm exterior CPP distribution mains that tie into existing mains with provisions for future tie-ins. Due to the site constraints the excavation had to be dug vertically utilizing 14 meter deep shoring, which NAC elected to be a shot-crete soil nailing system on 2 sides with one side being the existing pump station and the third side as open cut. A reinforced concrete structure was utilized to bring the building to grade with the balance of the building being structural steel, masonry, and precast concrete cladding.

The pump station is powered via a new underground 27.6 KV feed that is reduced to appropriate voltages via roof top transformers and distributed throughout the plant through new switchgear and MCC’s. The facility is operated remotely via SCADA integration that tied into the existing SCADA systems. Extensive electrical relocations were completed as part of this project. A 27.6KV overhead line had to be decommissioned and relocated to an underground duct bank to facilitate the new construction taking place. Emergency Generator Station feeders were also distributed throughout the entire existing facility.

Many major shutdowns and isolations were required to achieve this new work in a safe manner. NAC self-performed all concrete work, process piping installations, plumbing, electrical distribution, and SCADA installations.