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Mortb 2005 Hayden Guleb Iaadant - 2004 AnxualHydrology Report ~ Page 1 1.0 INTRODUCTION The information assembled in this 2004 Annual Hydrology Report (AHR) includes data collected from the hydrologic monitoring sites for the 2004 calendaz yeaz at Hayden Gulch Terminal, Inc.'s (HGTI) Hayden Gulch Loadout (Loadout) facility, which is pemutted by the Colorado Division of Minerals and Geology (CDMG) 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 are shown on Figure 1, Moxitonng Site Lacatioxr. Hydrologic monitoring is performed for surface water, groundwater and Colorado Wastewater Discharge Permit System (CDPS) outEalls. In addition, the sediment impoundments are inspected quazterly in accordance with Rule 4.05.9(1'n. Water monitoring requirements fox the Loadout are found in Tab 13 of the existing, valid Mining and Reclamation Permit (revision date of Mau 2002). Two surface water sampling sites, HGSDI and HGSD3, aze located on Dry Creek upstream and downstream of the primary disturbance area, respectively. One groundwater monitor well, HGDAL3, is completed in Dry Creek alluvium downstream of the primary disturbance area. Surface water and groundwater monitoring at the Loadout occurs on asemi-annually basis, once during spring runoff conditions (April tluough June) and once during fall low flow conditions (typically during October or November). Due to a misunderstanding, CPDS monitoring was not conducted as frequently as necessary during the months of March, AprIl and May. Instead of weekly monitoring, the CDPS monitoring occurred monthly. During 2004, the hydrologic monitoring data collected prior to June 15, 2004 was collected by MWH, of Steamboat Springs, Colorado. Responsibly for the Loadout was transferred to Hydro- Environmental Solutions, Inc. (Hydro-Environmental), of Steamboat Springs, Colorado, on June 15, 2004. All hydrologic monitoring data collected after June 15, 2004 was collected under the supervision of Hydro-Environmental. In July 2003, HGTI was notified by Colorado Department of Public Health and Environment (CDPHE) that HGTI was out of compliance with Section 25-9-101, et seq., C.R.S., which requires that any wastewater handling system be under the supervision of a certified industrial wastewater system operator. As part of the transfer of project responsibility to Hydro-Environmental, Mr. John Weinman, a certified Level D Industrial Wastewater Operator, assumed the role of operator in responsible charge for the wastewater treatrnent facilities. HGTI notified CDPHE of this change in June 2004. Consequently, on June 30, 2004, CDPHE certified that HGTI was in Cull compliance with the operator cernfication requirement. Hydro-Envuoamental Solutions, Inc. 57 10'b Sxreet, Sxitc B * P.0. Box 772996 Steamboat Spring; CO 80477 (970) 846-5112