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water bars, will be installed as required and will be done in accordance with applicable <br />regulations and stipulations. Waterbars will be left in-place to assist in future erosion control. If <br />utilized, culverts will be removed at the completion of the project or as accepted by the USFS <br />Road Engineer. <br />Drill Site Construction <br />Drill sites will be approximately 100' x 200' in size. Smaller dimensions will be utilized <br />whenever possible. Drill site sizes and layout will be reviewed with the USFS representative <br />prior to construction. Table 2 lists the estimated amount of disturbance. <br />Bnrsh and/or small trees will be cleaned from the drill pads using a bulldozer. Topsoil will be <br />removed and stockpiled on the upslope side of the drill pad and remain undisturbed during <br />drilling at the site. The topsoil pile will not be seeded due to the short duration of storage. <br />Approximately one foot of soil thickness will be salvaged and stockpiled at the disturbance site <br />with a "TOPSOIL" sign clearly mazking the pile. Leveling of the drill sites (cut and fill) by <br />grading the subsoil and/or weathered rock is not anticipated. <br />Slurry (mud) pit construction will be made on the downslope portion of the topsoil stripped drill <br />pad. Using either a D-6 dozer or backhce, from one to two pits will be excavated at each site, <br />depending upon depth of drill hole and projected water requirements. The mud pit(s) will be <br />approximately 10' wide, 30' long and 6' deep. Subsoil and rock materials excavated from the <br />pits will beheld separately and used to refill the mud pits upon reclamation. All pit constructions <br />and extracted subsoil will be within the stripped pad area. <br />The hydrologic balance will be protected by minimizing disturbance and through the entrapment <br />of sediments from exploration activities. Using the existing roads or trails to the degree practical <br />minimi~Ps surface disturbance. Where possible, the existing vegetation will be left in-place and <br />the need for sediment control therefore reduced. With the existing roads mainly located in the <br />flatter area (along the ridge tops or valley bottoms), the need for new disturbance and the <br />possibility of sediment loss is reduced by avoiding areas of steep slopes. Likewise, by utilizing <br />existing flat areas for drill pads, only minimal surface disturbance will be necessary to level <br />uneven portions of the site and to construct a mudpit. <br />Salvaged soils will be placed upslope of the drill pad with appropriate sediment control devices <br />surrounding the down slope portion of the soil stockpile. A similaz sediment control device will <br />be placed on the downslope side of the subsoiUrcek stockpiles from the slurry (mud) pits. <br />Overland flow of the drill fluids will be directed into the slurry pit as will most precipitation <br />runoff. The drill pads will typically be reclaimed within two weeks of construction. <br />Where roadwork is required to widen or level the roadway, the amount of material disturbed can <br />be significantly reduced in volume by limiting the soil material removed to only a few inches in <br />depth. This method leaves some topsoil in place while creating an adequate reserve for <br />redistribution, without significantly disturbing the major root systems of the existing grasses and <br />10 <br />