2016-11-23_REVISION - C1982056 (2)

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Drainage control for such facilities as haulroads, parking lots, tipple areas, buildings and other structures is an important factor in minimizing contributions of sediment outside the proposed permit area. All such facilities have been designed, built and rnaintained to provide for proper handling of runoff as reflected by Map 24, Surface Facilities. Significant protection of surface water quality will be achieved through the identification, marking, and general avoidance of stream buffer zones. No surface disturbance will occur within stream buffer zones, with the following exceptions: • Portions of existing Haulroads B-2 and C and pipeline disturbance within the Haulroad C disturbance corridor • The existing road and railroad crossings of Foidel Creek • The temporary disturbance associated with installation of the Thickener Underflow Lines under Foidel Creek (within the existing road crossing disturbance area) and the 6MN water transfer line under fish Creek • Access road crossings of Fish Creek to the Tow Creek Shaft site and Northwest Mains/6-Main North Shaft Sites • Limited encroachment at fond B, the Fish Creek Water Treatment Facility, the 6 -Main North site, and the 6RT Thickener Underflow Borehole • Subsidence -related disturbances discussed in 2.05.6(6) For all stream buffer zone disturbances, detailed plans and designs have been submitted to and approved by the CDRMS, consistent with the applicable authorization provisions of Rule 4.05.18 (refer to construction and operating plans under Rule 2.05.3(4)). No streams within buffer zones or streams classified as intermittent or perennial will be diverted. Stream buffer zones have been identified on Map 29, Reclamation. These zones will be marked in the field near the areas of proposed surface disturbance immediately before construction activities. Highly visible markers will be placed close enough together so that at least one marker is visible at any point along the boundary of the buffer zone in any active areas. (ii) The rights of present users to surface and ground water, which may be adversely affected by the surface coal mining and reclamation operations; In the extremely remote event that retention of runoff by mining operations creates an adverse quantitative impact within the permit area or downstream, any injury can be mitigated with water from substantial holdings of senior surface water rights within the general area held by TCC. The total quantity of flow rights is 115.18 cfs on a decreed absolute basis, and 638.34 cfs on a conditional basis, for a total of 753.52 cfs. For a four-month irrigation season, this would translate to 27,414 acre-feet on an absolute basis, and 151,935 acre-feet on a conditional basis for a total of 179,349 acre-feet. The total quantity of storage rights is 15,515 acre-feet on a decreed absolute basis, and 54,200 acre-feet on a conditional basis, for a total of 69,715 acre-feet. The grand total of these amounts is 249,069 acre-feet. TCC has an adjudicated water rights augmentation plan that can be used to implement mitigation of downstream surface water quantity impacts, should they occur. The presentation of these quantities and augmentation plan dernonstrates that TCC holds sufficient water rights to mitigate any potential problem with respect to water availability. Water rights owned by TCC can be used to mitigate impacts caused by the TCC operations. Also, the augmentation plan allows for the replacement of tributary ground water with TCC's senior surface water rights. Table 9, Summary of Ground Water Rights, provides the listing of these rights controlled by TCC. Additional discussion is presented under Rule 2.04.7(3), Alternative Water Supply Information, beginning on page 2.04-34. (iii) The quantity of surface and ground water both within the proposed_ permit and adjacent area from adverse effects of the proposed minim activities, or where the protection of quanti1y cannot be ensured to provide alternative sources of water in accordance with „2.04.7(3) and 4.05.15; and TR16-86 2.05-129 11/21/16