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Page Ten Preliminary Adequacy Review GEX - Roadside 6 Cameo Mines April 27, 1981 3. Scope of Exemption Surface coal mining operations conducted within the geographic extent of an exemption are not required to comply with the requirements of Section 114(2)(e)(I). However, the mining operations must meet all of the remaining requirements of the Act regarding protection of the hydrologic balance. Exempted operations must therefore, satisfy the requirements of Section ll4(2)(c), 121(2)(1), any related performance requirements of Section 121, and as required 121(2)(j), the appropriate requirements of 120(2)(j). The requirements that must be satisfied include the performance standard for R13uviaZ Valley Floows(120(2)(j)(VI)). Non-exempted operations, i.e., those surface coal mining operations not conducted within the specific geographic area of exemption, must satisfy the requirements of Section 114(2)(c), Section 121(2)(1), any related performance standard requirements of Section 121, the appropriate requirements of 120(2)(j) AND the requirements of Section 114(2)(e)(I). 4. Information Required The alluvial valley floor exemption is very complicated for underground mines, and it may take a while to determine the geographical extent of the lands eligible for the exemption.: Since all Alluvial Valley Floor issues must be resolved prior to the permit issuing, the applicant should supply the requested information as soon as possible. The existence of an alluvial valley floor, adjacent to or within an area eligible for exemption would not prohibit mining (as could be required under 114(2)(e)(I)), but the essential hydrologic functions must be restored (120(2)(j)(VI)), or the applicant would have to prove the mining operation would not significantly affect the AVF. The applicant has two courses of action: It can concede that the areas mapped as unconsolidated stream-laid deposits are an AVF or submit a reconnaissance level RVF investigation. The reconnaissance level alluvial valley floor investigation should provide the following information, including all supporting data, assumptions, and methods of determination: 1. A map showing the location of aI1 unconsolidated stream-laid deposits. Include the present flood plain and ALL associated terraces. Only high isolated terraces may be excluded from the determination. (Map on USGS 7-I/2 minute quad.). This mapping has already been done by the applicant, but mapping of all the required information should be done on one map. 2. Identify on the map, the permit area, the Life-of-mine area, and the reconnaissance study area. 3. On that same map show all areas of existing or historic flood irrigation.