Laserfiche WebLink
-~- <br />For more information of the coal seam geology, the reader is advised to consult <br />Appendix C of the April 14, 1981 application. The Division finds that the applicant <br />has satisfied all of the requirements of Sections 2.04.5 and 2.09.6 dealing with <br />general and detailed descriptions of the preliminary geology. <br />V. Hydrologic Balance: Surface Water (2.04.5, 2.04,7, 2.05.3, 4.05) <br />The Wyoming Fuel Company Canadian Strip mine is Located in North Park. North Park <br />is an inter-mountain basin bounded by the mountains of the Medicine Bow Range to the <br />east, the Park Range to the west, and the Rabbit Ears Range to the south, The <br />majority of waters which pass through the basin are derived from snowmelt on the <br />forested slopes of the various mountains. The North Platte River is the major river <br />of the region. Two major tributaries of the North Platte River are within three miles <br />of the mine site; the Michigan and Canadian Rivers. All of the mine activities occur <br />within the watershed of Bolton Draw, which is tributary to the Canadian River. Bolton <br />Draw is an intermittent drainage which receives varying amounts of water from trans- <br />basin diversion of Michigan River water through Spear Ditch from May through July. <br />Otherwise, flows in Bolton Draw occur primarily from snowmelt runoff. Further <br />information on the general hydrology may be found in Appendix C, Volumes I and ZI <br />of the April 14, 1981 application. <br />There are three existing sediment ponds serving to control sediment generated by <br />mining activities in the Pit 1 area. These ponds are identified as Pond #I, Pond #2 <br />and Pond #3, and are shown on Figure 2. One additional sediment pond, Pond #4, and one <br />temporary impoundment for undisturbed flow, Temporary Impoundment #1, are proposed <br />for operations in the Pit 2 area. During the course of the review, several concerns <br />were raised with respect to the ponds. All of the ponds were reviewed for compliance <br />with the performance standards of Section 4.05,6. This review identified problems <br />with the spillway designs in meeting the freeboard requirements of 9.05.6(8)(d). <br />Wyoming Fuel Company subsequently revised the spillway designs to incorporate the <br />required freeboard. These revisions are incorporated within the September 16, 1981 <br />version of Figure 2. As a portion of the September 16, 1981 revision includes <br />improvements to an existing structure, Pond #1, the Division imposes the following <br />stipulation: <br />WYOMING FUEL COFIPANY WILL CONSTRUCT THE SPILLWAY TO POND 1 AS SHOWN ON THE <br />(~ / SEPTEMBER 14, 1981 VERSION OF FIGURE 2, AND PROVIDE CERTIFICATION IN THE FORM <br />V OF A LETTER SIGNED AND SEALED BY A REGISTERED PROFESSIONAL ENGINEER THAT THE <br />EMBANKMENT AND SPILLWAY EXIST AS SHOWN ON FIGURE 2, NO LATER THAN APRIL 1, 1982. <br />The regulations also specify that certification of ponds by a registered professional <br />engineer is required irrmiediately following construction (4.05.6(7)). In order to <br />clarify the meaning of "immediately" and to clearly set out the responsibilities of <br />Wyoming Fuel Company, the Division imposes the following stipulation: <br />WYOMING FUEL COMPANY SHALL PROVIDE CERTIFICATION, IN THE FORM OF A LETTER <br />f~ SIGNED AND SEALED BY A REGISTERED PROFESSIONAL ENGINEER, THAT POND #9 AND <br />,_ J TEMPORARY IMPOUNDMENT #1 WERE CONSTRUCTED AS PER THE APPROVED DESIGNS WITHIN <br />THIRTY DAYS OF COMPLETED CONSTRUCTION. <br />