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February 2003 Hayden Gukh Tnminal, Inc. * Hoyden Gakb Loadowt - 2002 Annua! Hydrokgy Rrpor! ~ Page 7 <br />1.0 INTRODUCTION <br />The information assembled in this 2002 Annual Hydrology Report (AHR) includes data collected from <br />all hydrologic monitoring sites for the 2002 calendar year at Hayden Gulch Terminal, Inc.'s (HGTI) <br />Hayden Gulch Loadout (L,oadout) facility, Mine and Redamadon Permit No. C-92-081. <br />Locations of the hydrologic monitoring sites are shown on Figure 1, Monitoring Site I,acation Map. <br />Hydrologic monitoring at the Loadout is performed for surface water, groundwater and Colorado <br />Wastewater Discharge Permit System (CDPS) outfalls, Water monitoring requirements fox the <br />Loadout are found in Tab 13 of the existing, valid Mining and Reclamation Permit (revision date of <br />May 1998). Two surface water sampling sites, HGSD] and HGSD3, are located on Dry Creek <br />upstream and downstream of the primary disturbance area, respectively. One groundwater monitoring <br />well, HGDAL3, is completed in Dry Creek alluvium downstream of the primary disturbance area. <br />Surface water and groundwater monitoring is required semi-annually, once during spring runoff <br />conditions {typically during April or May} and once during fall low flow conditions (typically during <br />October or November). The CDPS monitoring occurred weekly, however, sample collection was only <br />required on a montlily basis when discharge was present. <br />MWf7 * 1475 Pine Grove Road, Suite 109 * Steamboat Speingr CO 80477 * (970J 879-6260 <br />