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Mareh 2007 Hayden Gukh Loadout - 2000Annuat Hydrology Aeport ~ Page 1 1.0 INTRODUCTION The information assembled in this 2006 Annual Hydrology Report (AHR) includes data collected from the hydrologic monitoring sites Eor the 200G calendaz yeaz at Hayden Gulch Terminal, Inc.'s (HGTI) Hayden Gulch Loadout (T.oadout) facility, which is permitted by the Colorado Division of Reclamation, Mining and Safety (CDRMS) under Mine and Reclamation Permit No. C-92-081. 'The AHR has been prepared and submitted in accordance with Rule 4.05.13(4)(c). Locations of the hydrologic monitoring sites aze shown on Figure 1, Monitoring Site Locatianr. Hydrologic monitoring is performed for surface water, groundwater and Colorado Wastewater Discharge Permit System (CDPS) outfalls. In addition, the sediment impoundments aze inspected quazterly in accordance with Rule 4.05.9(1. Watu monitoring requirements for the Loadout aze Eound in Tab 13 of the existing, valid Mining and Reclamation Pertnit (renewal date of May 2003). Two surface water sampling sites, HGSDl and HGSD3, aze located on Dry Creek upstream and downstream of the primary disturbance azea, respectively. Two groundwater monitor wells, HGDAL3 and HGDAL4, aze completed in the Dry Creek alluvial system. HGDAL3 is located downstream of the primary disturbance azea. Monitor well HGDAL4, which is located upstream of the disturbance area, was installed in November 2005. This well was installed to address CDRMS concerns regazding background alluvial water quality upstream of the Loadout facility. Surface water and groundwater monitoring at the Loadout occurs on asemi-annually basis, once during spring runoff conditions (April through June) and once during fall low Elow conditions (typically during October or November). CPDS monitoring was conducted weekly during the snowmelt runoff season (Mazch, April and May) and at a minimum of monthly during the remaining months. In accordance with Secton 25-9-101, et seq., C.R.S., the sedimentation ponds at the Loadout facility, which serve as a wastewater handling system, aze operated under the supervision of a certified industrial wastewater system operator. Hydro-Environmental staff includes a certified Level D operator. The Colorado Department of Public Health and Environmen[ (CDPHE) certified that HGTI was in full compliance with Section 25-9-101, et seq., C.R.S. on June 30, 2004. Hydro-Environmental Solutions, Inc. P.O. Box 772996 57 1016 Street, Suite B Steambaot Springs, CO 80477 (970) 8716125