Laserfiche WebLink
I~ <br /> <br />Technical Revision No. 9 - Change in Hydrology Monitoring Requirements <br />Most of the information submitted with this revision was included in the <br />response to the Mid-Term Review and in the Seneca Mine hydrology <br />reports. The purpose of this revision was to formally incorporate the <br />revised hydrology monitoring program into the permit application. <br />Technical Revision No. 10 <br />As mining progressed to the east and north in the Wadge Pit, disturbance <br />was encroaching on what is now referred to as Bond Creek. This revision <br />was the detailed design and construction plan for Sediment Control Pond <br />007 to control drainage into Bond Creek. <br />Technical Revision No. 11 <br />When the boom on the 770B dragline went down in the Wadge Pit, coal was <br />uncovered by scrapers along the open Wadge Pit with the approval granted <br />under Minor Revision No. 24. Additional scraper coal was needed which <br />necessitated a change in mining sequence to allow scraper excavation in <br />the north end of the Wadge Pit. This revision encompassed land which <br />was planned for disturbance in the current permit term and also included <br />drainage control. <br />Technical Revision No. 12 <br />In order to allow coal extraction at the location of Pond 007, surface <br />rights to land immediately east of Pond 007 on Bond Creek were obtained <br />from the State Land Board and an additional 61.1 acres was added to the <br />permit area in order to construct Sediment Pond 008. <br />Technical Revision No. 13 <br />This revision requested three modifications to the hydrology monitoring <br />program. These changes were originally submitted with the Seneca II <br />1986 Annual Hydrology Report. These modifications included reducing the <br />monitoring frequency at two wells and replacing the HYMO model for <br />drainage design with SEDIMOT II. <br />Technical Revision No. 14 <br />This revision included relocation of the 770 dragline deadhead route and <br />expansion of the disturbance limits in the Wadge pit to allow for <br />additional extraction of state-owned coal up to the current coal lease <br />boundaries. It was necessary to have additional room with the <br />TR-37 5 Revised 04/05 <br />