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• The flow in the Nelson Ditch might officially be classed as <br />spring water because only a minor amount is surface runoff. The <br />majority of the water flows out of glacial outwash alluvial material <br />as springs 100 - 1500 feet north of the monitoring point. The <br />feed for these springs is primarily the Carbon Ditch, SP-D, and <br />SP-C flow which is used to irrigate north, east and west of these <br />springs all within a 1500 foot radius. An additional source for <br />these springs may be flow through the alluvium. The conductivity <br />on the Nelson Ditch is typical of the alluvial wells and springs <br />#1 and #3. <br />Flow in SP-A during high flow is primarily irrigation runoff <br />but at low flow is primarily springs. Feed for these springs is <br />irrigation water which flows through formation prior to surfacing. <br />The flow through the formation may result in the high conductivity <br />during low flow. <br />• The conductivity on SP-B corresponded closely with the con- <br />ductivity from the mine discharge. The higher conductivity for <br />both was a result of relatively high old mine discharges, UG-5. <br />The calculated mass average T.D.S. affect that SP-B had on SP-D <br />was a 41 mg/L increase. <br />The pH on the SP points was typical with the exception of <br />a few high readings on SP-B. These high pH's resulted from water <br />setting in the pond for long periods of time before discharge. <br />Springs were monitored for flow only. This year's flows are <br />more accurate due to changes noted in the 1984 Hydrologic Report. <br />Spring 4 is similar to SP-A springs in that it is affected by the <br />same irrigated fields and the springs that flow through formation. <br />Spring 4 occasionally has direct irrigation runoff. Spring 5 is <br />on the hillside between SP-A and Spring 4. This spring is normally <br />. just a damp area with no flow. Flow measurements are taken when <br />flow is visible. <br />