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• effluent water quality will be ensured according to methods outlined <br />in the Discharge Plan filed with the CDOH, Water Quality Control <br />Division submitted on May 14, 1980, <br />The three water retention and sediment control structures at the faci- <br />lity are designed to contain all but the most severe precipitation <br />events. The loadout is essentially a zero-discharge facility and is <br />not anticipated to create any measurable water quality impacts on <br />either the alluvium or the Roaring Fork River. <br />4.6.2.3.5 Protection of Irrigation Patterns <br />Unit Train Loading Area <br />The loadout facility is situated entirely on an area that has histori- <br />cally been flood irrigated. The protection of the historic irrigation <br />• patterns is achieved by minimizing the area of disturbance and also <br />providing structures to continue the irrigation to all areas outside <br />of the permit boundary. The total area of disturbance at the loadout <br />facility is approximately 20 acres. The culvert locations are shown <br />on Drawing D-2-4 and are also listed in the culvert schedule on that <br />drawing, In addition to the seven culverts shown on the drawing. <br />three inverted siphons are included to carry irrigation water and <br />storm runoff to its historic locations. These inverted siphons are <br />also indicated on Drawing D-2-4 along with a typical cross-section <br />showing details of the inverted siphons. <br />Conveyor <br />The conveyor corridor crosses a section of historically irrigated land <br />on the west side of the river. This 50-foot wide corridor disrupts <br />irrigation on about 1-acre of land. The areas below the corridor <br />• <br />4-139 <br />