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• Table 6 is a description of the site numbers by investigation and description of the type of <br />sample location for surface water. Niap No. 32 presents these sites for the period of record <br />1974 throu~~h the present. Many of the sites were sampled only twice during the recent past <br />by Leonard Rice Consulting Water Engineers (1979) and the Colowyo Coa] Company in <br />1931. These data are presented in a later section but no analysis of means, minimums or <br />maximums are possible due to the lack of data points. These data are useful, however, in <br />showing the wide variation in quantity and quality and will be discussed in the Surface Water <br />Quality Section. <br />Additional data collected by Colowyo Coal Company for Taylor Creek and Goodspring <br />Creek since 1981 indicates the same wide variations in both quantity and quality. The wide <br />variation is in response to seasonal runoff, however, the response and effects on <br />concentration showed a greater variation during the extremely high runoff years of 1984 and <br />1985. This information is available in the Annual Reclamation and Hydrology Reports <br />submitted to the CDMG for the period 1983 through the present. <br />Permit Area <br />Surface water in the mine area is limited to Streeter Gulch, Streeter Pond, East Taylor Gulch, <br />East Taylor Pond, West Pit Pond, Warehouse Pond and sediment sump, Work Area Pond, <br />three evaporative sewage ponds, Section 16 Pond, Prospect Pond and Gulch A Pond. Three <br />additional detention ponds are located at the Loadout Area. All ponds, with the exception of <br />the warehouse/sewage pond complex, are sedimentation ponds and respond only to runoff <br />related events. The ponds are designed to contain or treat a ]0-year, 24-hour precipitation <br />event. Additionally, water flowing off of the reclaimed lands is retained by contour furrows, <br />revegetated slopes and a number of small depressions/stock ponds. A number of permanent <br />drainage channels and temporary drainage channels will also be incorporated into the final <br />reclaimed landscape to route water efficiently to sediment ponds. Refer to Map 11 - <br />Hydrology, North; Map 12 -Hydrology, South; Map 12A -Hydrology of Gossard and Mine <br />Maintenance Areas and Exhibit 7 -Hydrology for the location and information about these <br />various pond, depressions and ditch structures. <br /> <br />2.04.7-29 Revision Date: 8/29/97 <br />Revision No.: TR-42 <br />