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All of the twelve ponds have been fully reclaimed. References to designs for these <br /> ponds and their locations are found in Tables 13-5 and 13-6 of the permit application. <br /> With the exception of approved small area exemptions, all surface runoff from <br /> disturbed areas was routed through a sediment pond. All but two sediment ponds <br /> were designed to contain the runoff and sediment from a 10-year, 24-hour <br /> precipitation event. Sediment Ponds#1 and 92 were combined to contain the 25-year, <br /> 24-hour storm event. Sediment ponds #1, #2, #7, #8 and #11 required pumps as the <br /> principal dewatering mechanism because the surrounding ground elevations were <br /> higher than the sediment pond bottom elevations. The emergency spillways were <br /> designed to pass the 25-year,24-hour peak flow. The outflow below the spillway was <br /> armored with riprap where necessary to control erosion. <br /> Sediment Pond #3 was never constructed. All ponds have been reclaimed and have <br /> received bond release approval. <br /> E. Acid-forming and Toxic-forming Spoil <br /> The Division has determined that the mine will not produce toxic or acid-forming <br /> Spoil. <br /> F. Impoundments <br /> The only impoundments utilized within the permit area in addition to sediment ponds <br /> were sewage lagoons, and three non-discharging sumps. A set of evaporative, non- <br /> discharging sewage lagoons were permitted near the loadout for treating water from <br /> the Roadside Mine and the loadout. The sewage lagoons have been reclaimed. <br /> Two small sumps were constructed in the North Decline reclamation area and one <br /> sump was constructed in the Cameo Borrow Area#1 (CBA-1)to serve to capture and <br /> treat runoff from reclaimed lands. These sumps were adequately sized to contain <br /> runoff from a 25-year, 24-hour storm event. Both sumps were reclaimed following <br /> approval of PR-5. <br /> G. Surface and Ground Water Monitoring <br /> The permittee conducted monitoring of groundwater in a manner approved by the <br /> Division. The groundwater monitoring plan is detailed in Tab 18 of the permit <br /> application. Piezometers have been installed in various permit area locations to <br /> monitor water level and/or quality in alluvium, refuse fill, the Rollins Sandstone <br /> and abandoned sections of the South Portals Mine. Monitoring locations are shown <br /> on"Roadside and Cameo No.l Mines Hydrologic Monitoring Map" (Exhibit 56), in <br /> Tab 18. The groundwater monitoring plan is outlined below; for additional detail <br /> refer to Tab 18 of the approved permit. (4.05.13(1)): <br /> Unit Train Loadout Piezometers <br /> 27 <br />