Laserfiche WebLink
• <br />• <br /> <br />Yoast Mine <br />Pond 12A Design <br />HYDROLOGIC INPUT PARAMETERS <br /> SEDCAD 4 <br /> Channel YPM-6-2 <br /> Watershed ID -Structure 9 - SWS1 <br />Watershed Area: 17.2 <br />West side subwatershed <br />Sedimentology: k Factor and Control Factor <br /> HYDROLOGIC CONTROL AREA <br />WATERSHED TYPE VEGETATION COVER SOIL GROUP k FACTOR FACTOR (acres) <br />Aspen/Mountain Brush Good (>70%) C 0.37 0.042 4.8 <br />Reclaimed Topsoiled, No Vegetation B 0.16 0.043 11.3 <br />Reclaimed Topsoiled, No Vegetation B 0.16 1.0 1.0 <br />Total 17.2 <br /> 0.22 0.10 <br /> SEDCAD 4 <br /> Channel YPM-6-2 <br /> Watershed ID -Structure 9 - SWS2 <br />Watershed Area: 20.3 <br />East side subwatershed <br />Sedimentology: k Factor and Control Factor <br /> HYDROLOGIC CONTROL AREA <br />WATERSHED TYPE VEGETATION COVER SOIL GROUP k FACTOR FACTOR (acres) <br />Reclaimed Topsoiled, No Vegetation B 0.16 1.0 9.20 <br />Reclaimed Fair (30%<x<70%) B 0.16 0.043 8.13 <br />Aspen/Mountain Brush Good (>70%) D 0.37 0.042 1.0 <br />Sagebrush Good (>70%) D 0.37 0.042 2.00 <br />Total 20.3 <br /> 0.19 0.48 <br />Undisturbed vegetation information taken from Exhibit 10-1, Premining Vegetation Map. Hydrologic soil group values <br />based on soil types which were taken from Exhibit 9-1, Soils Type and Soiis Salvage Map. Disturbed area vegetation <br />information (Reclaimed: vegetated, fair (30% - 70%]; or, topsoiled, no vegetation) taken from 2006 Annual Reclamation <br />Chronological Seeding Map (Yoast Mine 2006 Annual Reclamation Report). Field observations as of June 2007 indicate <br />areas seeded in 2006 display good stand establishment and growth. Approved Yoast Mine "k" Factor and Control Factor <br />values are presented in Appendix 13-12, Postmining Drainage and Sediment Control, Tables 13-12.2 and 13-12.3, <br />respectively. <br />TR-36 <br />13-12.1-75 <br />Revised 08/07 <br />