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history of the Seneca II Mine. <br />I ~ Technical Revision No. I - Change in Wadge Mining Plan - April 1982 <br />This revision requested permission to change the mining plan in the <br />Wadge area. The overall direction of mining (pit orientation) was <br />virtually unchanged. Only the pit sequencing and associated roads were <br />changed. The reclamation timetable was also revised to reflect the new <br />mining plan. This revision did not affect mining in the Wolf Creek <br />area. <br />In brief, this revision requested that the location of the box cut in <br />the Wadge area be moved from the western edge of the Wadge area to a low <br />overburden area more centrally located within the coal field (an area <br />originally planned for mining in 1995). This change eliminated the <br />short box cut, thus leaving an area temporarily reclaimed for nine <br />years. The decision was also made to leave one of the draglines in this <br />area until completion of mining. <br />Technical Revision No. 2 - Haul Road F and Breaching of Haul Road Berms <br />• This <br />Wolf revision requested permission to <br />Creek area. The road was to be construct a new haul road in the <br />used mainly as a haulage road out <br /> from the lower end of the Wol£ Creek area. This road eliminated the <br /> need for the haul trucks to back track down the hill. <br />Berms are required by MSHA regulations for haul truck safety. PCC <br />requested that these berms be breached every so often to allow drainage <br />of water off the haul road. In most cases, these breaches were confined <br />to areas not yet reclaimed, or were directed into concentrated runoff <br />drainages. All road drainage waters pass through either Sediment Ponds <br />002, 003, or 004. <br />Technical Revision No. 3 - Auger Mining <br />In order to maximize coal recovery in areas where recovery lines were <br />being reached, PCC requested permission to auger mine three highwall <br />areas: Pits A, B, and C. Pit A (Lennox coal) was to be mined in <br />conjunction with reclamation operations; for economic reasons this never <br />came about. Auger mining of the Wadge coal was conducted in Pits B and <br />C. <br /> <br />TR-37 3 Revised 04/05 <br />