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I , A4mrb 2004 ~ 2003 Annaal Hydrology Re~wz 1 Page 23 I' Magpie, or Second Alkali Creek during the reporting period. Similarly, the remaining sedimentation ponds never filled to the discharge point, so there was also no pond discharge during 2003. I' Given the lack of surface flows in area drainages during the reporting period, no surface water samples were collected during 2003. Historic field and laboratory water quality data for surface water monitoring stations on Newlin, Magpie, and Second Alkali creeks ate summarized in Tables 10, ] 1, I' 14, 15, and 16, Water Quality Data, XXX. The analysis of historic surface water quality monitoring results presented in the 2001 Annual Hydrology Report and summarized as follows remains valid for conditions and potential mining related impacts to date. I' (2001 Surface Water Quality Analysis) -Review of historic water quality monitoring data indicated no srgnificant variation between upstream and downstream monitoring locations and no significant ' changes in water quality parameters over time. Water quality monitoring data for Newlin Creek showed no significant variation between upstream and downstream monitoring locations, and are comparable to measured water quality parameter values for previous monitoring periods. Due to the ' lack of measurable surface flows, no water quality samples or monitoring data were collected during 2001 for Magpie and Second Alkali creeks. Ongoing monitoring of surface flows for Newlin, Magpte, and Second Alkali creeks provides for identification and evaluation of any future changes in water quality that may result for mining and related activities. Surface water quantity and quality monitoring ' results to date indicate no significant impacts to surface water as a result of mining and related activities. ' 3.3.2 Loadout Area The Loadout and adjacent areas fall within the lower portions of the Oak and Chandler creek ' drainages, both of which are tributary to the Arkansas River. Oak Creek is a perennial drainage above the municipal wellfield for the Town of Rockvale, Dependent on water demand and withdrawal levels for Rockvale, flows in Oak Creek below the wellfield may be either perennial or ephemeral. In ' areas adjacent to the Loadout Area, flows in both Oak and Chandler creeks are frequently ephemeral (refer to Section 2.04.7 of the Southfield Mitring and Reclamation Plan document for more details). EFCI monitors stream flows in Oak Creek adjacent to the Loadout Area. EFCI also monitors any ' srormwater runoff discharge from the two active sedimentation structures, Ponds L-1 and L-2, in the Loadout Area. TABLE 9 STREAMFLOW MEASUREMENTS Icfs) Quarter- Year Monitoring Date Newlin Creek Magpie Creek Oak Creek Second Alkali Creek 4th - 1979 10/11/79 nsw 1st-7980 2/07180 nsw - - - 2nd - 1980 5/12/80 SWM N2&3 - - 3rd - 1980 7/17/80 nsw - 4th - 1980 i 2/23/80 nsw 75t - 1981 2/17/81 nsw 4th-1981 12108/81 nsw - ist- 1982 7127/82 nsw - - 3/30/82 nsw 1st - 1983 3/17/83 - 2nd - 7983 5/11183 No meas. - No meas. 4th - 1983 10/06/83 Low flow No meas. 1 st - 1984 1 /20/84 0.1 7 - 2.20 Atli%H * 1475 Prv/e Grotr Raarl, SNrtr 109 * Strm~dwnt .fpiiu,y GO 60487 * (970J 879-6260 inY~ •-;~ ~-..d /namix~.~e...,nyd..+yr ry~n?~n+.i.e.nHM~~ 1//elM dv