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Marcb 2004 2003 Anneal Hyr/rolaey ReDon ~ Poee 22 3.3 SURFACE WATER MONITORING RESULTS 3.3.1 Mine Area The Mine and adjacent areas fall within the lower portions of the Magpie and Newlin creek drainages and encompass the central portion of the Second Alkali Creek drainage, all of which are [ributary to the Arkansas River. Newlin Creek is a perennial drainage above the mine property to the diversion point for the City of Florence Municipal Water Supply. Within the mine property, flows in Newlin, Magpie, and Second Alkali creeks are all ephemeral (refer to Section 2.04.7 of the Southfield Mining and Reclamation Plan document for more details). EFCI monitors stream flows in Newlin, Magpie, and Second Alkali creeks. EFCI also monitors any stormwater runoff discharge from active sedimentation stmctures and historically monitored any mine water discharge from the mine water treatment system, which included Fresh Water Pond No. 3, under the terms of an approved CDPS Permit. In addition to the mine water treatment and storage ponds, there were originally three sedimentation ponds, Sedimentation Ponds 1, 4, and 5, in the Mine Area. In the Mine Area, the current surface water monitoring program includes the following monitoring stations, located as shown on Figure 1, Mine Monitoring Locations: . Station Location Desi ation NC-2 E'/zSE'/. Section 26 Newlin Creek Upstream ' T20S, R70W NC-1 W'/zNE'/. Section 19 Newlin Creek Downstream T20S, R69W ' MC-1 E'hNW'/. Section 30 Magpie Creek Upstream T205, R69W MC-2 WYzNE'/< Section 30 Magpie Creek Downstream T20S, R69W SA-1 E'/zNl~/'/. Section 24 Second Alkali Creek ' T20S, R70W 002 E'/zNW'/. Section 30 Pond 4 Outlet (Newlin) T20S, R69W ' 004 WYzSE'/. Section 19 Pond 5 Outlet (Newlin) T20S, R69W ' Monitoring Stations 001 (Pond 1 Outlet to Magpie Creek) and 003 (Pond 3 Outlet to Magpie Creek) were previously included in the monitoring program. Ponds 1, 2, and 3 have, however, been removed and reclaimed in conjunction with final mine reclamation activities, and Stations 001 and 003 have ' been eliminated from ongoing monitoring. EFCI also no longer includes data from the single monitoring point that existed on Newlin Creek prior to second quarter of 1997, when the two current monitoring points were established. Data from the original Newlin Creek monitoring point (NC-1) ' was included in previous Annual Hydrology Reports. Field and laboratory analysis data for surface water momtonng stations are summarized in the following discussions. Raw field and laboratory data for the 2003 water year are provided for reference in Appendices A and B. ' Historic stream flow measurements for Newlin, Magpie, and Second Alkali creeks are summarized in Table 9, Streamflow Measurements. Due to continuing drought conditions, the limited precipitation ' received during the 2003 water near was not sufficient to generate typical ephemeral flows in Newlin, MIlYH * 7475 Pine Grove RooA .Suite 109 * S/emnGoat .Springr, CO 80487 * (970J 379-6260 ire ~rp;dW=.~ r,~.,,m! un.o.n i9+,..,, ~rl ^an n.....e u,a iy„ umnw .m