Laserfiche WebLink
Topsoil, overburden, and gravel will be removed using loaders, dozers, or scrapers in all pits, <br />establishing a vertical wall along the outer edges of the mined areas. <br />Prior to any topsoil excavation on site, a 6' high chain link fence will be installed as shown on <br />Map C -2, which will tie into the existing fences in certain places, to ensure that the public will <br />not have access to the site. Also, collection ditches and the mine sediment pond will be <br />constructed in the Pit 1 area prior to topsoil stripping to ensure there is erosion control on the site <br />from the start of operations. <br />PIT 1: <br />Although Pit 1 is shown on Map C -2 to be 21 acres in size, only the southeast corner will <br />initially be stripped to minimize the amount of topsoil and overburden that need to be stockpiled. <br />This location is also the lowest gravel floor elevation and will be the location of the sediment <br />pond once the excavation reaches the bottom of the gravel. Topsoil stripped from the initial 10.8 <br />acre pit will be used to construct a berm creating the visual barrier along the north of the <br />proposed excavation from the northeast corner of the permit to immediately west of the <br />Macintosh residence. This is a distance of 1180 feet and will require topsoil of 17,400 cubic <br />yards to construct it. Using a topsoil thickness of 12 inches, the initial area of excavation <br />required to attain this volume is 10.8 acres. The Inside slope of the berm will be 2H:1V and the <br />outside slope varies from 2.5H:1 V to 4H:1 V, as shown on Map C -2. As the operation advances, <br />additional portions of the berm will be built from the topsoil excavated. The berm will provide a <br />visual and noise screening of the operations from D 1/2 Road and 32 1 /2 Road, as well as the <br />residences that exist in these areas. The berm will be constructed to allow irrigation to continue <br />in the Pit 2 and Pit 3 areas until future mining. All overburden from the stripping of the initial <br />portion of Pit 1 will be stockpiled on an area south of the existing open drain ditch (33 Road <br />Drain), and east of future Pit 3. See Map C -2. This volume is approximately 12 feet thick x 10.8 <br />acres, or 209,000 cubic yards. Gravel under this stockpile area was previously mined by others, <br />has no remaining resource under it, and is ideal for staging and stockpiling activities. <br />Otter Creek Pit December 12 D -2 <br />