Laserfiche WebLink
June 6, 2012 C-1981-016/Hawk Nest E& W JRS <br /> RECLAMATION SUCCESS(cont.): - Production data was based on the dry weight of all live grasses and forbs <br /> (2012 growth only)clipped from either a 0.25 or 0.5 square meter quadrat that was placed to the right of each <br /> transect's starting point(at 0 meters). Samples were collected in paper bags and were dried in an oven at 105 <br /> degrees for approximately 1 week. Samples were then weighed on an analytical balance and a pounds/acre <br /> production amount was calculated. <br /> - Based on the sampling,the east mine had a live vegetative cover value of 24.3%and a hydrologic cover value of <br /> 79.4%(hydrologic cover includes live cover, litter and rocks). The east mine had an average productivity rate of <br /> 586 pounds/acre. The three dominant species at the east mine were western wheatgrass, intermediate wheatgrass <br /> and slender wheatgrass, with relative cover percentages of 10.6%, 3.1%and 2.9%,respectively. The percentage <br /> of relative cover from noxious weeds at the east mine was 2.0%. The cover at the east mine was sufficient to <br /> stabilize the surface and no erosional problems were noted. <br /> - Based on the sampling,the west mine had a live vegetative cover value of 28.1%and a hydrologic cover value of <br /> 85.6%(hydrologic cover includes live cover,litter and rocks). The west mine had an average productivity rate of <br /> 519 pounds/acre. The three dominant species at the west mine were crested wheatgrass, yellow sweet clover and <br /> western wheatgrass, with relative cover percentages of 16.0%, 5.3%and 5.1%,respectively. The percentage of <br /> relative cover from noxious weeds at the west mine was 2.8%. The cover at the west mine was sufficient to <br /> stabilize the surface and no erosional problems were noted. <br /> - Based on the sampling,the bleeder entry area had a live vegetative cover value of 24.0%and a hydrologic cover <br /> value of 79.5%(hydrologic cover includes live cover, litter and rocks). The bleeder entry area had an average <br /> productivity rate of 192 pounds/acre. The three dominant species at the bleeder entry area were smooth brome, <br /> western wheatgrass and intermediate wheatgrass, with relative cover percentages of 17.5%, 2.0%and 2.0%, <br /> respectively. The percentage of relative cover from noxious weeds at the bleeder entry area was 3.0%. The cover <br /> at the bleeder entries area was sufficient to stabilize the surface and no erosional problems were noted. <br /> - Based on the sampling, overall the Hawk's Nest Mine had a live vegetative cover value of 26.1%and a <br /> hydrologic cover value of 82.3%(hydrologic cover includes live cover, litter and rocks). The Hawk's Nest Mine <br /> had an average productivity rate of 528 pounds/acre. The three dominant species at the Hawk's Nest Mine were <br /> crested wheatgrass, western wheatgrass and yellow sweet clover,with relative cover percentages of 7.9%, 7.4% <br /> and 2.7%,respectively. The percentage of relative cover from noxious weeds at the Hawk's Nest Mine was 2.4%. <br /> The cover at the Hawk's Nest Mine was sufficient to stabilize the surface and no erosional problems were noted. <br /> This completes the 6 June 2012 inspection report for the Hawk's Nest Mine. <br /> Number of Partial Inspection this Fiscal Year: 4 <br /> Number of Complete Inspections this Fiscal Year: 2 <br /> Page 3 of 10 <br />