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land(Mandatory Standard 1),with at least 10%of the un-fenced acreage,possessing> 1,000 stems per acre <br /> (Mandatory Standard 2). Fenced woody plant density concentration areas are held to secondary standards(1-3, <br /> outlined in Tab 22 of the PAP).There are no fenced concentration areas within the BRB5, so the secondary <br /> standards are not applicable to the SL7 application. <br /> The species diversity success standard uses data collected from cover sampling. Four tests are used to determine <br /> revegetation success for species diversity. Success is demonstrated by passing the first(A),and at least two of <br /> the remaining three (B, C,and D),tests. These tests are described at length in Tab 22 of the PAP and the CCAI <br /> revegetation monitoring report included as Appendix D of the SL7 application. <br /> Drainage control at the site comprises armored reconstructed drainages, sedimentation ponds and stock tanks as <br /> well as various secondary containment measures including check dams,diversion ditches, sediment sumps, <br /> contour ditches,riprap,and vegetative sediment filters among other methods. Sedimentation ponds have all <br /> been designed to meet State and Federal regulations and to provide storage and treatment for runoff resulting <br /> from 10 year 24 hour precipitation events. <br /> Protection of the hydrologic balance at the site comprises ground water and surface water monitoring for water <br /> quantity and water quality. The natural ground waters at the Seneca IIW mine comprise high concentrations of <br /> dissolved minerals and solids. It is expected that spoil utilized in reclamation will affect ground water quality as <br /> TDS (total dissolved solids),trends increase over baseline levels. Seven sediment ponds are utilized for <br /> controlling surface runoff from disturbed areas. Six of the ponds are NPDES surface monitoring sites. <br /> Monitoring occurs in Sage and Dry Creeks as well as Hubberson Gulch. Surface and groundwater monitoring <br /> installations will remain until final phase III bond release. Water rights have been protected and a water <br /> augmentation plan was put in place for the over appropriated Yampa River. <br /> Alluvial Valley Floors <br /> A 1990 AFV study evaluated the Dry, Grassy and Sage Creek drainages around the Seneca IIW permit area <br /> with respect to their potential as AVF's. As intermittent streams, Dry and Sage Creeks have insufficient <br /> carrying capacity to remove sediment built up from fans emanating from tributaries and sediment from <br /> valley slopes. The lower reaches comprise alluvium with limited water availability although there exist areas <br /> of flood irrigation. AVFs do exist adjacent to and downstream of the Seneca property. There is hydraulic <br /> communication with two subirrigated fields in the Dry Creek drainage as well as flood irrigated fields in the <br /> Sage Creek drainage. A determination was made that any subirrigated sites are distant to the permit <br /> boundary lying some miles to the north. <br /> Post Mining Land Use <br /> The approved post mining land use for the lands applicable to SL7 is rangeland/wildlife habitat. The <br /> reclamation plan and the approved revegetation standards are designed to achieve the approved post <br /> mining land use. Livestock grazing has occurred on the sites reclaimed lands since 2007. Topsoil depth <br /> replacement information was included in the SL5 Phase II bond release application that was approved in <br /> 2014. <br /> Post Mine Land Use <br /> Post mining land use comprise livestock grazing and wildlife habitat. Grazing encompasses the majority of the <br /> reclaimed lands as granted by landowners. Grazing numbers range between 104 and 230 cow calf pairs. <br /> Permit Number: C1982057 Page 7 of 15 <br /> Phase III <br />