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Febnrary 2002 Hayden Gulch Ternrmal, Inc * 2001 Annual Hydrvlogy Rtpmt • Page 1 <br />1.0 INTRODUCTION <br />The information assembled in this 2001 Annual Hydrology Report (AHR) includes data collected from <br />all hydrologic monitoring sites for the 2001 calendar year at Hayden Gulch Terminal, Inc.'s (HGTI) <br />Hayden Gulch Loadout (Loadout) facility, Permit No. C-92-081. <br />Locations of the hydrologic monitoring sites are shown on Figure 1, Monitoring Srte Latatron Map. <br />Hydrologic monitoring at the Loadout is performed for surface water, groundwater and for Colorado <br />Wastewater Discharge Permit System (CDPS) outfalls. Water monitoring requirements for the <br />Loadout are found in Tab 13 of the existing, valid Mining and Reclamation Perot (revision date of <br />May 1998). Two surface water sampling sites, HGSDl 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. Surface water and groundwater monitoring is <br />required semi-annually, once during spring runoff conditions (typically during April or May) and once <br />during fall low flow conditions (typically during October or November). The CDPS monitoring <br />occurred weekly, however, sample collection was only requited on a monthly basis when dischazge was <br />present. <br />Montgomery Wahon * P.O. Boa 774078 * Steamboat Spnngg CO 80477 * (970J 879-6260 <br />~ 6'1BBl\2GlHNn Ap/~ WIi1NR Wien/n <br />:IIIl03d <br />