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MAYFLOWER SEEPAGE COLLECTION / PUMP STATION <br /> • <br /> Seepage from 5 Dam is captured through a system of tenched and piped subdrains beneath <br /> the toe of the dam and upstream for 1500 feet. Seepage is routed by gravity flow directly into <br /> either of the two concrete seepwater ponds located at the toe of the dam, just above the <br /> clearwater pond. These collection ponds are designed to allow seepage to be collected <br /> in one pond while the other one is being serviced. The collected seepwater flows to the <br /> Clearwater Pond where it is pumped back to the Mayflower Treatment Pond. The <br /> Clearwater Pond has standby pumps and a standby generator as a backup to the <br /> seepwater return system. The pumping of seepwater is discontinued during the snow melt <br /> bypass period. <br /> Pond Volumes Pump Capacities <br /> Seepwater Ponds undetermined Clearwater Pond Pumps 2 I.R. pumps, 750 gpm total <br /> Clearwater Pond 5 million gallons <br /> Operating Procedures / Controls <br /> Pumpback pump #1 is run off of a variable speed drive set to maintain a pond level of 7.5'. <br /> Pumpback pump #2 will start at a level above 7.5', but does not have a variable drive. <br /> Controls for the pumps are outlined on the boxes on the MCC deck. <br />