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• There are no major water bodies in the Southfield mine or adjacent areas <br />other than the sedimentation and storage ponds utilized in conjunction <br />with mining activities. EFCI has a total of three (3) sedimentation ponds <br />and two (2) storage ponds all located within the permit area and having <br />a total capacity of approximately 24.2 acre feet. These ponds are all <br />temporary structures which will be removed upon completion of mining, <br />reclamation and related operations. <br />Locally significant drainages in the Southfield loadout and adjacent areas <br />are Oak and Chandler Creeks. Oak Creek is a perennial stream originating <br />approximately eight (8) miles southwest of the loadout area in the <br />foothills of the Wet Mountains. The headwaters of Oak Creek are located <br />at an elevation of approximately 9,200 feet and Oak Creek drains an area <br />of approximately 23.0 square miles. Oak Creek skirts the Town of Rockvale <br />where a municipal well field utilizes groundwater flow from the Oak Creek <br />alluvium. Operation of the Rockvale well field and municipal water <br />• demands result in some reduction in surface and base flows in addition to <br />groundwater subflows. As a result, flows in Oak Creek below the well <br />field are limited and the stream may exhibit either ephemeral or perennial <br />flow characteristics in its lower reaches. The Southfield loadout area <br />is located approximately 2.5 miles below the Town of Rockvale and <br />approximately one (1) mile above the point where Oak Creek joins the <br />Arkansas River. Oak Creek exhibits characteristics of a typical <br />transitional stream channel with the headwaters area exhibiting <br />characteristics of the mountainous environment, an intermediate interval <br />where the stream channel broadens and becomes shallower with significant <br />downcutting and erosion as progressive stabilization occurs, and a lower <br />reach typical of lowland drainage with broad, shallow stream channel, <br />adjacent terrace deposits, and an irregular relatively porous streambed. <br />The second significant drainage in the loadout and adjacent areas is <br />Chandler Creek, an ephemeral stream with headwaters at an elevation of <br />approximately 7,400 feet, six (6) miles above the loadout area. Chandler <br />• Creek drains a total area of approximately 9.1 square miles and joins the <br />Arkansas River approximately one (1) mile below the loadout. Chandler <br />2.04.1-25 <br />