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structures are stable and will require infrequent maintenance. They meet the requirements of <br />4.05.18 and 4.05.4, applicable local, State, and Federal statutes and regulations and are designed <br />to safeguazd public safety and to minimize adverse impacts to the hydrologic balance [Rules <br />4.05.4(1) and (4)]. Locations and profiles of these channels aze shown on Maps 19, 33 and 33A <br />of the Permit. Design information for the channels is included in Exhibit 7 [Rules 4.05.3 and 4]. <br />C. Stream Channel Diversions -Rule 4.05.4 <br />Minor realignments and changes in permanent stream channels profiles aze permitted within <br />reclaimed mined and excess spoil fill areas (primary example is Streeter Gulch). Riprap is used <br />to control erosion. The channels are stable and require infrequent maintenance (Rules <br />4.05.4(2)(a) and(4.05.4(4)(b)]. These alignments and changes aze consistent with applicable state <br />law, will not diminish downstream water rights and meets the requirements of Rule 4.05.4(3). <br />D. Sedimentation Control Measures, Ponds and Dischazge Structures -Rules 4.05.5, 6 & 7 <br />Ten sediment ponds are in place as approved by the Division and have been treating disturbed <br />azea surface water runoff These are the Streeter Gulch, Work Area, Gulch A, Loadout, Stoker, <br />Railway Loop, Prospect, West Pit, East Taylor, and Section 16 Ponds. Designs for these ponds <br />are included in Exhibit 7, and locations of the ponds are shown on Maps 12 and 37. <br />E. Acid-forming and Toxic-forming Spoil -Rule 4.05.8 <br />No significant acid-forming spoil exists within the overburden or coal seams to be mined <br />(Permit, page 2.05-57). Overburden sampling and regraded spoil sampling plans were approved <br />for the East Pit and Section I I Pit during the first two permit terms. These plans aze discussed in <br />Exhibit G and Section 2.05 of the Permit. Results from past sampling are included in the mine's <br />Annual Reclamation Reports. These programs were instituted primarily due to concerns about <br />high sodium adsorption ratios (SAR) in some over- and interburden materials. Analogous <br />35 Revised October 30, 1997 <br />