1999-01-27_PERMIT FILE - M1999006

Home Browse Search

Exhibit I - SoilsInformation SOIL SALVAGE STOCKPILES Once removed from its native location, soil will be windrowed along the perimeter of the area of extraction and seeded with the reclamation seed mixture specified under Exhibit E-Table 1: Reclamation Seed Mixture. This will provide an opportunity to gage the performance of the seed mixture while attempting to provide a stabilizing cover of vegetation over the stockpile until it is ready for replacement on finished slopes and affected lands remaining above the anticipated final water level of the finished ponds. It should be noted that the final water level will fluctuate seasonally with the groundwater. Windrowed salvaged soil stockpiles will be graded such that side slopes are 3h:I v or flatter. This will aid seeding efforts, while reducing the profile exposure of the stockpile to wind and water erosion. To the extent possible, stockpiles will be oriented parallel to the prevailing Westerly winds, and in a manner that will aid abatement of visual and noise impacts of on-going resource recovery operations [refer to Exhibit D -Mining Plan]. SOIL TESTING, RECORDS, AND FOLLOW-UP Soil horizonation study will occur as an ongoing part of the resource recovery and land reclamation activities. Soil horizons will be analyzed and compared with publish NRCS Soil Survey data prior to,or during, extraction activities. Differences in soil types, nature, and extent will be noted and the soil map refined as applicable. Insitu soils will be sampled across its different horizons as extraction activities progress across the location. Sampling will utilize a hand auger and approved NRCS soil sample bags, and utilizing recommended procedures. Testing will be conducted by the CSU Soil Laboratory in Ft. Collins, Colorado. The tests will be used to monitor soil quality and suitability. Salvaged soil volumes will be reported to areas requiring revegetation to assure adequate volumes to area of affected land requiring revegetation. Soil tests and salvage reports will be provided to the DMG at the time of the required DMG Annual Report. SITE FOUNDATION AND STABILIZAT10N Direct precipitation from short duration, high intensity rainstorm events, and wind, are the major threats to soil stability at this location. Although the location is nearly a table, and although the extraction will result in pits that cause water from direct precipitation to drain internally,additional measures to assure site stability and protection of off-site areas will be made. The measures taken to stabilize the soil stockpiles, as described above, should be adequate for controlling erosion from wind and direct precipitation. Due to the flat topography, there is little upland watershed that would impact the location. Additionally, the windrowed soil stockpiles will also serve to reduce impacts of wind and precipitation of exposed areas undergoing extraction. The greater threat of erosion will be to resoiled slopes pending establishment of vegetation during reclamation. While some rilling can be anticipated on unprotected areas during the initial phases of reclamation, the conservation measures provided below should help to keep the potential for such effects to a minimum. Prior to resoiling, the foundation material that will underlie the soil will be sculpted to establish initial soil stabilization features, and left rough to aid in resoil adhearance. Soil will be replaced with scrappers, graded by dozers over the 18.0±inch minimum friable, or otherwise EXHIBIT I - Soils Information 2 Colorado Division of Mineral s & Geology Regular Impact [1121 Construction Material Permit Sand Land, Inc. - Kurtz Resource Recovery & Development Project - January 1999