2012-04-16_REVISION - C1981012 - Laserfiche WebLink

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Page 2 of 3 • 2.05.3(9)(d) — The plan shall describe each permanent monitoring well to be located in the backfilled area, the stratum underlying the mined coal, and gradient from the backfilled area. • 2.05.3(9)(e) — The requirements of 2.05.3 shall also apply to pneumatic backfilling operations, except where the operations are exempted by the Division from requirements specifying hydrologic monitoring. (2) Please provide a letter from the legal or equitable landowner that would initiate, implement, approve, or authorize the use of the land following reclamation as required by Rule: • 2.05.5(2)(b) — The description shall be accompanied by a copy of the comments concerning the proposed use by the legal or equitable owner of record of the surface of the proposed permit area and the State and local government agencies which would have to initiate, implement, approve, or authorized the use of the land following reclamation. (3) Please provide an updated Map 15 including the area of the proposed construction of the 29- foot diameter ventilation shaft required by the following Rule: • 2.05.5(2)(c) —A map prepared to the standards of 2.10 shall accompany the plan. (4) Please provide the design and calculations for the upland diversion ditches above the proposed construction of the 29 -foot diameter ventilation shaft to fulfill the requirements needed by the following Rules: • 4.05.3(2) — Temporary diversions shall be constructed to pass safely the peak runoff from a precipitation even with a 2 -year, recurrence interval, or a larger even as specified by the Division for good cause shown. • 4.05.3(3) — To protect fills and property and avoid danger to public health and safety, permanent diversions shall be constructed to pass safely the peak runoff from a precipitation event with a 10 -year, recurrent interval, or a larger event as specified by the Division for good cause shown. Permanent diversions shall be constructed with gently sloping banks that are stabilized by vegetation. Asphalt, concrete, or other similar linings shall be used only when approved by the Division to prevent seepage or to provide stability. • 4.05.3(7)(a) — Channel linings, including channel riprap. Shall be designed using standard engineering practices to pass safely the design velocities. • 4.05.3(7)(b) — Freeboard shall be no less than 0.3 feet. Protection shall be provided for transition of flows and for critical areas such as swales and curves. Where the area protected is a critical area as determined by the Division, the design freeboard may be increased. • 4.05.3(7)(c) — Energy dissipaters shall be installed when necessary at discharge points, where diversions intersect with natural streams and exit velocity of the diversion flow is greater than that of the receiving stream.