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SECTION 2 -METHODOLOGY <br />r? <br />U <br />Groundwater <br />To determine the presence of alluvial aquifers, wells were installed in the alluvium of major <br />canyons within the permit area. Four wells were installed in Lorencito Canyon, and two wells <br />in Cow Canyon, with the other canyons having one well installed near the canyon mouth. A <br />total of 12 wells were installed. Most wells were installed with ten feet of screen and <br />generally do not exceed thirty feet in depth. Alluvial wells were assigned names based upon <br />location. Each well was designated with an MW prefix, followed by a two or three letter code <br />for the canyon the well was located in, and a number to designate the location with the <br />numbers increasing up the canyon. The location of monitoring wells is depicted on Map <br />2.04.7-1. <br />Surface Water <br />For the Lorencito Canyon Mine site area, watersheds were determined for each of the major <br />named drainages within the permit area. Each of these divides between the watershed areas <br />was delineated, and areas planimetered to determine the total watershed area. In addition, the <br />length of each of the drainages was determined, along with the channel slope within the <br />• permit area. Determination of the flow at the surface water sites was done by direct <br />measurement with a current meter or flume. <br />Springs and seeps were first surveyed in January 1996 and subsequently confirmed in aerial <br />and ground surveys during March 1996. The first ground reconnaissance was performed by <br />transecting the property along the major drainages while examining for evidence of springs <br />and seeps. All springs and other water bodies noted during aerial reconnaissance were <br />confirmed by ground survey prior to transfer to the hydrology baseline map. A total of 11 <br />springs were located. The location of these springs is depicted on Map 2.04.7-1. <br />For each of the spring locations, flow and field parameters were determined. The flow values <br />were determined by piping or channeling all the flow from the spring to a central point and <br />then diverting this flow into a container of a known volume. The time for filling the container <br />was noted and this flow measurement translated to gallons per minute (gpm). <br />Surface waters including ponds were also surveyed quarterly in 1996. Ground surveys were <br />conducted in January in coordination with the spring and seep survey, and aerial <br />reconnaissance was performed in March. All aerial data were confirmed on the ground prior <br />to the transfer of this data to the hydrology map. A total of 19 ponds were located onsite. <br />Ponds were monitored by placing a staff gauge to record water level. Depth to the water <br />surface from the top of each staff gauge was measured quarterly. Locations of all ponds are <br />depicted on Map 2.04.7-1. <br />0 4