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INTRODUCTION <br />Sediment Pond 001 is an earthen embankment structure constructed by <br />Peabody Coal Company in the mid-1970's as a temporary sediment structure <br />to control runoff and sediment from the disturbed areas of Nucla Mine. <br />Sediment Pond 001 is located in Section 36 of Township 47 North, Range 16 <br />West, northwest of the town of Nucla. <br />INSPECTION <br />On July 8, 1986, engineers from Peabody's Compliance Engineering <br />Department inspected Sediment Pond 001. The purpose of this inspection <br />was to assess the safety and general condition of the structure with <br />respect to the regulations of the Colorado Mined Land Reclamation Division <br />(CMLRD). While, as a result of this inspection it was determined that the <br />storage capacity of 001 was inadequate, it was determined that the safety <br />and general condition of the structure is satisfactory. This report <br />. contains Peabody's remedial compliance plan. <br />SITE DESCRIPTION <br />LAND USE <br />Sediment Pond 001 has 485-acre watershed that is tributary to Tuttle <br />Draw. This watershed is classified as approximately 53 percent <br />undisturbed, 15 percent disturbed, and 32 percent reclaimed. <br />EMBANKMENT <br />The existing embankment is a homogeneous earth fill and is presently very <br />well vegetated. The top width of the embankment is 15-foot wide with <br />upstream and downstream slopes of approximately lh:ly each. The existing <br />spillway consists of a v-notched wier placed in a trapezoidal channel. <br />DESIGN ANALYSIS <br />GENERAL <br />• Sediment Pond 001 was evaluated and redesigned to meet or exceed the <br />1 <br />