Laserfiche WebLink
Pond Outfall <br />Number Notes <br />001 Old Refuse Pile, East <br /> U er <br /> Middle <br /> Lower <br />006. Old Refuse Pile, To <br />008 Bus Gara e <br /> East <br /> West <br /> North <br />010 Wazehouse <br /> U er <br /> Lower <br />013 Mine 4 <br />Pond Outfall <br />Number Notes <br />017 Mine 5 <br />018 Mine 1 <br /> U er <br /> Lower <br />021 Sute Refuse Pile <br /> U er <br /> Lower <br />022 Mine 2 <br /> U er <br /> Lower <br />023 Mine 3 Bin Pad <br />024 S1 Pond <br />025 Rock Tunnel Pad . <br />Reclamation construction at each of the ponds was accomplished in the same manner. <br />Construction began by excavating the corrugated metal pipe (CMP) dewatering device located <br />within each pond. Excavated dirt was generally used as a topsoil substitute at the top of the pond <br />embankment, along a small portion of the pond mazgin, or on associated access roads. During <br />removal of the CMP, the side slopes of each cut were reduced to 2.5 H : 1 V, and the excavation <br />was widened to five feet minimum width. Following completion of excavation, two courses of <br />rip rap were placed within the cut. -The first was mechanically pushed into the excavated <br />embankment at the base and into the lower portion of the side cuts: The second course was <br />placed over .the first: The cut slopes-were then severely roughened to minimize erosion potential <br />and to promote successful revegetation. A wetlands seed mixture was distributed around the <br />perimeter of each pond from the water level to an elevation ten feet above the water level. An <br />upland, high altitude reclamation seed mixture was distributed on any disturbed azeas above the <br />ten foot elevation, and on the access roads. Approximately sixty willow cuttings were planted at <br />the perimeter of each pond. <br />The Best Management Practices employed included severe surface roughening of excavated pond <br />embankments in order to disrupt surface flows and to minimize erosion potential. Construction <br />was accomplished when-water levels were low so as to not impact waterquality with sediment. <br />All disturbed azeas were revegetated with appropriate wetlands and uplands area seed mixtures in <br />-order to promote long term stability of the sites. Silt fences were erected below excavation areas <br />in order to7etain sediment prior to it entering adjacent water. resources. <br />Inspections conducted in 2002 indicate that the Best Management Practices employed during <br />construction were functioning as designed. The rock rip rap placed in the bottom of the <br />excavated spillways was sufficient in size and volume to deter erosion. No erosion of the <br />embankment cut slopes was observed. The severe scarif cation and the minimal height of these <br />azeas was sufficient to minimize erosion potential. The silt fence erected at the base of each cut <br />slope was tightened and stabilized as needed at select locations. Generally, silt fence will be <br /> <br />