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INTRODUCTION <br />• l <br />Sediment Pond 005 is an earthen embankment structure constructed by <br />Peabody Caal Company in the mid-1970's as a temporary sediment structure <br />to control runoff and sediment from the disturbed areas of the Nucla <br />Mine. Sediment Pond 005 is located in Section 36 of Township 47 North, <br />Range 16 West, Northwest of the town of Nuc1a, Colorado (see Exhibit <br />13-4). <br />INSPECTION <br />On July 8, 1986, engineers from Peabody's Compliance Engineering <br />Department inspected Sediment Pond No. 005. The purpose of this <br />inspection was to assess the safety and general condition of the <br />structure with respect to the regulations of the Colorado Mined Land <br />Reclamation Division (CMLRD). As a result of this inspection, it was <br />determined that the storage capacity of Na. 005 was inadequate. It is <br />l Peabody's intention to repair these deficiencies in accordance with the <br />• 1 remedial compliance plan contained in this report. - <br />SITE DESCRIPTION <br />LAND USE <br />Sediment Pond No. 005 has a 31-acre watershed that is tributary to <br />Tuttle Draw. This watershed is classified as approximately 58 percent <br />reclaimed and 42 percent undisturbed upland sagebrush-grass. <br />EMBANKMENT <br />The existing embankment is a homogeneous earth fill. The top width of <br />the embankment is a minimum 12 feet wide with upstream and downstream <br />slopes of approximately 2H:1V, respectively. The existing spillway <br />consists of an 12-foot wide, trapezoidal channel. <br /> <br />1 <br />