Laserfiche WebLink
Spryer, 8/3/01 <br />2 <br />TOPSOIL: Topsoil stripped for mining activities will be stored until needed for revegetation. <br />Topsoil stockpiled for longer than one year should be stabilized with perennial vegetation. The <br />grass seeding recommendation labeled 'Cooley Reservoir Mix A' can be used for this purpose. <br />Grass should be planted in accordance with the directions provided for best success in <br />establishment. <br />REVEGETATION: Land not covered by water should be graded to slopes not exceeding 3-foot <br />horizontal to one-foot vertical. Shallower slopes would be preferable for reduced erosion and <br />ease of seeding. Topsoil should be replaced on the soil surface in quantities sufficient to provide <br />the new grass seeding the best medium for growth. Ali disturbed areas not covered by water <br />should be planted to the grass seeding recommendation labeled 'Cooley Reservoir Mix B'. This <br />mix consists of the same grass species found torhe north and west of iiie lake and si~ould be <br />used to replace grass in these areas removed by mining. If the Tall wheatgrass on the south side <br />of the lake is disturbed, it can be replaced with more Tall wheatgrass by using `Cooley Reservoir <br />Mix C'. Grass should be planted in accordance with the directions provided for success in <br />establishment. No grazing should occur until the grass is well established which may take from <br />two to four years. <br />FERTILIZER: Fertilizer should be applied only after the soil is tested to determine rate of <br />application. Soil samples should be taken according to CSU Cooperative Extension guidelines. <br />Application of fertilizer should be in accord with recommended amounts. <br />WETLANDS: The National Wetland Inventory map of this area shows a potential wetland on this <br />site. In addition, many of the soils on this property are considered hydric, another indicator of <br />potential wetlands. Since wetlands could be adversely affected by this activity, we recommend <br />that the Army Corp of Engineers be contacted should any permits or mitigation be required. A <br />wetlands consultant may be helpful in recommending site-specific plantings Headed to revegetate <br />the site after mining. Another concern is the pumping of silt-laden water into the southern end of <br />the lake. This area is already functioning as a shallow water wetland with islands of cattails and <br />soil interspersed. Additional sediment that fills in this area may impede the function of the <br />wetland. If functional wetlands are part of the post mining land use, it may be preferable to <br />extend the pipeline delivering silt further north to fill in deeper areas of water that do not have <br />these valuable wetland characteristics. <br />THREATENED AND ENDANGERED SPECIES: There are a number of protected species <br />associated with riparian areas including Bald eagle and Preble's meadow jumping mouse. We <br />recommend that the Colorado Department of Wildlife be contacted to assess the potential impact <br />to these species. <br />if you have any questions about this information or need additional guidelines, please contact me <br />at the number shown above, <br />Sincerely, <br />~~~~~~~ <br />Andrea Vialpando <br />Soil Conservationist <br />