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Table 6 is a description of the site numbers by investigation and <br />description of the type of sample location for surface water. Map No. <br />32 presents these sites for the period of record 1974 through the <br />present. Many of the sites were sampled only twice during the recent <br />past by Leonard Rice Consulting water Engineers (1979) and the Colowyo <br />Coal Company in 1981. These data are presented in a later section but <br />no analysis o£ means, minimums or maximums are possible due to the lack <br />of data points. These data are useful, however, in showing the wide <br />variation in quantity and quality and will be discussed in the Surface <br />Water Quality Section. <br />Additional data collected by Colowyo Coal Company for Taylor Creek and <br />Goodspring Creek since 1981 indicates the same wide variations in both <br />quantity and quality. The wide variation is in response to seasonal <br />runoff, however, the response and effects on concentration showed a <br />greater variation during the extremely high runoff years of 1984 and <br />1985. This information is available in the Annual Reclamation and <br />Hydrology Reports submitted to the CDMG for the period 1983 through the <br />_ present. <br />. permit Area <br />Surface water in the mine area is limited to Streeter Gulch, Streeter <br />Pond, East Taylor Gulch, East Taylor Pond, West Pit Pond, Warehouse Pond <br />and sediment sump, Work Area Pond, three evaporative sewage ponds, <br />Section 16 Pond, Prospect Pond and Gulch A Pond. Three additional <br />detention ponds are located at the Loadout Area. All ponds, with the <br />exception of the warehouse/sewage pond complex, are sedimentation ponds <br />and respond only to runoff related events. The ponds are designed to <br />contain or treat a 10-year, 24-hour precipitation event. Additionally, <br />water flowing off of the reclaimed lands is retained by contour furrows, <br />revegetated slopes and a number of small depressions/stock ponds. A <br />number of permanent drainage channels and temporary drainage channels <br />will also be incorporated into the final reclaimed landscape to route <br />water efficiently to sediment ponds. Refer to Map 11 - Hydrology, North; <br />Map 12 - Hydrology, South; Map 12A - Hydrology of Gossard and Mine <br />Maintenance Areas and Exhibit 7 - Hydrology for the location and <br />-a information about these various pond, depressions and ditch structures. <br />2.04.7-29 <br />Revision Approved ~ ~7 97 <br />