Laserfiche WebLink
Description of Water Monitoring Sites <br />The Harvey Gap Outlet from Harvey Gap Reservoir originates as the Farmers <br />Irrigation water is discharged from the Harvey Gap Reservoir during the <br />irrigation season of April 15 to October 15. From October 15 to April 15, <br />a baseflow of approximately 0.5 cfs seeps through the dam's outlet system. <br />The 0.5 cfs baseflow during the winter commonly freezes over. When the <br />level of the reservoir is drawn down, the baseflow is reduced and has even <br />dried up completely. <br />About 50 feet from the dam's outlet, a six foot weir is located. At the <br />discharge of the weir, the water drops about 3 feet. Samples for field <br />parameters as well as chemical parameters are collected as the water drops <br />off the end of the weir. The flow is measured using the weir's flow rule. <br />At the mouth of Harvey Gap, about 4500 feet downstream of the six foot weir, <br />the Farmers Irrigation Ditch is lined with a concrete structure that divides <br />the ditch into the East Lateral and the West Lateral. The concrete structure <br />allows for adjustment of flows to the East and West Laterals. Samples for <br />field and chemical parameters are collected right above the division of the <br />East and West Laterals. <br />Abuut 750 feet downstream of the concrete structure in the East Lateral <br />there is a four foot Parshall.flume. About 2500 feet downstream of the <br />concrete structure in the West Lateral there is a six foot Parshall flume. <br />Flows are read from the flumes' flow rules and added together for the <br />total below the mine flow. <br />Below Harvey Gap Reservoir Dam is an area of water seeps that flow through <br />a culvert under County Road 237. A V-notched board has been placed in front <br />of the culvert that goes under County Road 237. The V-notched board is used <br />for flow measurement. Samples are collected in front of the V-notched board. <br />A geotech well has been drilled at the toe of the approved waste disposal <br />site. The well is 23 feet deep, down to bedrock. The well has produced <br />no water, no samples have been collected. <br />Water pumped from underground is sampled at the point the water discharges <br />from the pipe bringing the water from the mine. <br />2 <br />