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Mr. Roy L. Wright -2- May 10, 1984 Exhibits B and C 1. The mining operation should be described and shown on the map in greater detail. The extent of the area to be excavated should be shown on the map. The direction of mining should either be described or shown on the map. The locations of the items essential to the mining operation should be shown,(on J the map. These would include, but not necessarily be ]invited to: ]. All aggregate stockpiles; 2. P,-ocessing~equipment area; 3. Topsoil'~stockpi~ e area; 4. Sediment controlfstructures (such as berms), if any; 5. Wash water ponds; and, 6. Haul roads constructed as part of the operation. In this regard, any haul roads constructed as a part of the operation must be included in the permitted acreage, shown on the map, and reclaimed. J2. What is the estimated life of this mining operation? 3. A limited impact mining operation is limited to 70,000 tons of product J plus overburden moved per year. Your mining plan indicates a plan to move more than this amount. The plan must either be altered to commit to moving less than this limit, or a regular, 112 permit application must be submitted. Please clarify your position in this regard. 4. Your plan mentions a separate stockpile area. Please be advised that all processing areas, stockpile areas, etc, must be apart of the permit area. Such an area must be shown on a map and its use and reclamation (as well as soils, vegetation, water and wildlife data for it) must be described, just as is required for any other part of the permit area. Please clarify your plans concerning this separate area. 5. The operator should commit to the Salvage, stockpiling and stabilization (by planting with perennial grass cover crop) of topsoil sufficient to reclaim J this site. Details on the depth of topsoil to be salvaged should be given. The necessity for this topsoil salvage plan will become clearer when you have reviewed my comments that follow under Exhibit E. 6. It is not clear whether or not you plan to expose water during the mining operation. Given potential seasonal fluctuations of the level of ground water, this pit may not remain dry. Please clarify your plans in this regard, 7. There is no established rule for setbacks of mining operations from creeks and rivers. However, a typical, safe, rule-of-thumb setback width is 100 feet minimum. At this point, your plan seems to call for only 50 feet between the margins of the pit and the bank full marks of the Arkansas River and Maxwell Creek. If you wish to approach these flowing drainages closer than 100 feet, please give details on the potential hydrologic impacts to the streams from the mining operation and from potential breaches in the setback area due to high water during and after mining. (A commitment to a 100 foot undisturbed setback would make submission of such data unnecessary.) J 8. Will the aggregate materials sized at 1 1/2 inch minus be stockpiled and sold for aggregate from the stockpile area? 9. Please describe more fully the backfilling of the excavation area with aggregate material in excess of 1 1/2 inches in size. Where will it be backfilled?