Laserfiche WebLink
• soil auger hole. Spoil samples are normally shipped to Servi-Tech Laboratories in Hastings, NE for <br />analys(s. However, the one sample will be held until more are collected in 2092 to justify shipping <br />COSIs, <br />1'he location oi'each spoil pit is shown on Exhibit 200]-7, Backfill Sampling Location Map. The <br />analytical results from previous years indicates that all spoil is suitable. No additional grading, special <br />handling, or amendment application is needed prior to soil replacement. <br />Soil Redistribution <br />The topsoil that was used for redistribution was live handled from ahead of the active mining area to the <br />awaiting backfill area. Because the material is moved by mine equipment and is scheduled amongst the <br />other mining functions, discrete topsoil campaigns as done in the past are no longer conducted. <br />Soil "thickness <br />The thicl.ness of soil replaced during 2001 was verified by seven sample sites. Sample sites for the <br />Nc~n~ 1-lorizon 2 mining area were selected systematically utilizing a 467 foot by 467 foot grid pattern. <br />Sites at New Horizon 2 were determined from CAD drawings using distances and azimuths from <br />established survey points and located in the field by a Chainman II distance meter and a pocket transit. <br />A 2-~/4 inch bucket auger was used at each site to excavate a pilot hole through the entire soil strata. <br />• An abrupt boundary, defined by color and rock fragment content, typically occurred at the soil/spoil <br />interlace. The replaced soil thickness was measured through the pilot hole immediately after <br />encvuntcring the spoil. Minor Revision # 44 was approved by DMG in August 2000. The revision, <br />based on years of extensive sample analysis, allowed for a reduction in the parameters for which the <br />soil is analyzed <br />Soil thickness as determined by past sampling is shown on Exhibit 2001-6. Soil thickness information <br />for each sample site is located on the map. Attachment 2001-A lists the topsoil chemistry. <br />Ne\a~ Horizon 2 has many different soil thickness requirements as shown on Exhibit 2001-8, which is in <br />section 2.05.4-4 of the current permit. This shows the type and area of the reclaimed [and. <br />Soil Sah~aae and Storage <br />All suitable soil has been salvaged ahead of mining at New Horizon 2. Approximately 77,368 (LIFT <br />2).55.799 (LIFT 1 }, and 41,335 (MIXED) cubic yards of soil are stored in stockpiles at the end of <br />2001 as shown on Exhibit 2001-10 (2001 Topsoil Balance Map). The soils were separately <br />stockpiled by soil types as specified by our permit. <br />Cover Cron <br />All topsoil stockpiles have been planted with the approved cover crop seed mixture. <br /> <br />(e: \enq\data\wp\rec-repo\2001recrepo. doe) <br />