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the tank to the mill. Both lines have been removed from Figure 3 below in order to <br /> clear up the figure. Newmont apologizes for any confusion with the figures. <br /> Comment 3: Pipe Specifications. The pipe specifications indicate the discharge pressure at <br /> the pump is expected to be 275 psig. Two specifications are given for 8-inch diameter HDPE <br /> pipe: DR 11 and DR 07. A quick reference to HDPE pipe standard specification indicate DR <br /> 07 is rated for 333 psi. However DR 11 is rated for 200 psi. Please explain why how the two <br /> different pipes will be installed to ensure adequate pressure ratings for the system. <br /> Response 3: The selection of two different pipe specifications is due to the change in <br /> pressure along the pipeline from the booster pump to the discharge in the mill water <br /> tank. The water line will experience the greatest pressure at the booster pump with <br /> pressure decreasing along the line to the mill water tank. As such, a change in pipe <br /> specification along the line coincides with the change in pressure the pipe will <br /> experience. The first section of pipe from the booster pump will be DR 07 (rated for <br /> 333psi) to contain the anticipated pressure experienced at the booster pump (275 <br /> psi). This pipe will run for 1,870 feet at which time the pressure that the pipe is <br /> experiencing will sufficiently decrease to transition to a smaller DR pipe. The second <br /> section of pipe will run 3,245 feet and be constructed of DR 11 HDPE pipe (rated for <br /> 200 psi) to contain the pressure that the pipe will experience from the transition from <br /> the DR 07 pipe to the mill water tank. <br /> Comment 4: Schedule. The schedule indicated "replacement fresh water line from Grassy <br /> Valley is expected to be in place by the middle of November 2016, minimizing freezing <br /> concerns." The Division is concerned about potential delays in construction for the <br /> permanent replacement line. How does CC&V intend to mitigate potential problems due to <br /> freezing if there is a significant delay in the construction of the permanent waterline? <br /> Response 4: Newmont intends to mitigate the potential problems due to freezing if <br /> there is a significant delay in construction of the permanent water line by the <br /> following: <br /> - The temporary water line is designed to run continuously and/or be drained when <br /> not in service; <br /> - An interlock will be installed at the pump that will automatically shut down the <br /> pump in the event of pressure increase or decrease. The interlock will be based <br /> off of changes in pressures, flows, motor amperage, or a combination; <br /> - Daily monitoring of pump system for pressure, flow, and general maintenance, <br /> and; <br /> - Continual water flow monitored through the mill control room monitoring <br /> systems. <br /> Comment 5: Reclamation cost estimate. The TR-80 submittal did not include a demolition <br /> cost for the temporary waterline. Please provide a demolition cost estimate. <br /> Response 5: Mill Pipeline and Pump Warranty Estimate <br /> CC&V used the 2016 RS Means costs for calculating the increase in reclamation <br /> cost. The RS Means estimate for "Selective demolition, water & sewer piping & <br /> fittings, plastic pipe, 6-8" diameter", (2016 RSMeans #02 41 13.38.1700) is $2.73 per <br /> linear foot for a total of $13,963.90. A 22% contingency was added to the RS Means <br /> demolition cost $3,072.07. The RS Means "B-20" crew was used at 2 hours labor <br /> (based off of Davis-Bacon wage rates) resulting in a total of$373.76 for removal of the <br /> pump. The project in whole will increase the reclamation costs by a total of <br /> $17,409.73. <br />