Lewiston Pump Turbine Overhaul

Lewiston Pump Turbine Overhaul

Gracon is disassembling, rehabilitating, and reassembling all 12 pump turbine generators at the plant in 7month outages. Gracon has completed 10 overhauls to date. Work includes removal and replacement of the embedded discharge ring, seal ring, wicket gates, and the runner. It also includes refurbishing the stay ring, re-contouring the stay vanes, machining the horizontal surfaces, and line boring. 

Category
Hydropower
Started

April 2012

Completed

Ongoing

Owner

New York Power Authority

Location

Lewiston, New York