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September 15, 1980 <br />NORTHERN N0. I MINE - IdATER SYSTEM <br />Description <br />Potable water would be collected from the french drain system by a spring <br />box. <br />This box is a perforated concrete pipe set on end in a bed of gravel. <br />The water collected would be piped to a diversion box by a 4-inch PVC line. <br />At the diversion box, a portion of the water will be diverted to a frost- <br />proof box where a pump could be used to pump water to the water storage <br />tank above the Northern No. 1 portals. A 2-inch PVC gravity line would be <br />used to provide water to the Northern No. 1 bathhouse water tank. <br />Any water not diverted would flow, via 4-inch pipe, into a spring box at <br />the french drain from the portals area. A 4-inch PVC line would drain this <br />water into the small stock pond directly below the sediment dam. <br />Installation of the pump and line to the water tank above the portals is <br />not part of the work contemplated at this time, <br />Given the slope of the lines, the 4-inch pipe could handle up to 210 GPM <br />and the 2-inch pipe would handle 30 GPM. No pimping would be required. <br />All boxes would be equipped with man hole covers to allow access for <br />cleaning. <br />A water quality monitoring program of monthly samples for a full suite o£ <br />parameters has been started. NCC will continue the monitoring indefinitely, <br />since once water rights have been acquired, the water will be used at the <br />bathhouse and monitoring is required. Analyses obtained to date are <br />attached. The analyses indicate the water is potable with no treatment, <br />If infiltration of surface runoff contaminates the french drain water, <br />appropriate treatment will ensue to the potable supply and the residual <br />french drain water will be diverted to the sediment pond until the polluting <br />condition is eliminated. This action is also required under the spill <br />prevention and containment plan of the NPDES Permit. <br />...,~ ~ <br />Y 1. ~[ <br />