Laserfiche WebLink
• INTRODUCTION <br />The Eagle #5 and #6 Mines are underground coal mines, located approximately <br />seven miles south of Craig, Colorado (Figure 1) and operated by Cyprus Empire <br />Corporation (CEC). The aerial extent of the underground workings in the #5 Mine was <br />approximately 2,040 acres at the end of 1990 and since active mining in the #5 Mine <br />ceased in 1990 this acreage has not changed. The mains connecting the 5 and 5A <br />portals in the #5 Mine are still used for access to the #6 Mine. The coal extraction is <br />from the Cretaceous Age Williams Fork Formation, in the "E1" Seam in the #6 Mine. <br />During 1996, no active mining took place as the Cyprus Empire Corporation was idled <br />due to unfavorable market conditions. Hydrologic monitoring has been conducted at <br />the mine site since 1980. This report presents the results of year 1996 monitoring. <br />• The complete 1983 through 1995 monitoring is presented in the respective Annual <br />Hydrology Reports for each calendar year. The hydrologic monitoring is divided into <br />two parts: 1) groundwater, and 2) surface water. The monitoring locations are shown <br />on Figure 2 with monitoring requirements for each site summarized in Table 1. The <br />water quality monitoring includes field parameters (Table 2), water quality parameters <br />(Table 3), and NPDES parameters (Table 4). The water quality samples are analyzed <br />by ACZ Laboratories, Inc., Steamboat Springs, Colorado, a USEPA certified <br />laboratory. This report includes data collected specifically to meet requirements of the <br />Colorado Division of Minerals & Geology (DMG), as well as data collected to meet the <br />requirements of the Colorado Wastewater Discharge Permit System (NPDES permit). <br />• <br />C-61-044 1996 AHR. I'\EMPIRE\AHR\96AHR\EMPAHR96 DOC Page 1 <br />