Laserfiche WebLink
RULE 2 PERMITS <br />OWrwrrC Cnow$sction for Topwrl <br />R.pkP­­t O..ths A� <br />a ijyp(owl Dmrn.ps <br />o-:oAt .iQpe <br />o-iof6 r1o'pd <br />MClrnnalnnal <br />i <br />It- o ~ ,7 p"-6" vin —A <br />r <br />A <br />�y d <br />B w�z+ep.m R <br />C <br />A Generally defined as a "thin" zone of topsoil (0"-6") exclusively applicable to Sagebrush Steppe areas which will ideally average 4 inches <br />Areas seeded using the grassland mix will almost always be >10% slope and have > 6 inches of topsoil replaced <br />B Collom expansion area topsoil replacement depths will begin with approximately 6 inches at the top of slope breaks >10% and gradually <br />increase to approximately 12-18 inches mrd -slope up to potentially 3 to 4 feet down-slope to the base of slopes with armored channels, depending <br />on slope length and topsoil balance considerations <br />C Generally defined as the area within armored channels that will receive minimal to no volume of topsoil due to the likelihood any topsoil <br />placed within the structure would erode into terminal sediment control structures and be lost. On-site experience has demonstrated natural <br />sedimentation processes will support vegetation early post construction, and these areas will be seeded via broadcast method to provide a seed <br />source for beneficial species establishment <br />NOTE. Specific details regarding topsoil replacement depths on special planting areas will he included in the description provided for approval <br />prior to the creation of those areas. <br />The grassland targeted reclamation blocks will by necessity have thicker layers of topsoil than recent <br />reclamation areas due to reduced volume of topsoil that will be placed on sagebrush steppe areas. Unless <br />Colowyo provides specific justification, the topsoil resource will be placed in a manner that is thin on the <br />ridge tops and gradually increasing in depth to the base of coherent drainages. Large drainage bottom <br />channels in the Collom area that will convey water on a consistent basis will receive little to no topsoil <br />resource as any topsoil placed in these areas will likely be mobilized and washed down the drainage. The <br />full application of seed will still be applied to these areas in order to minimize erosion and allow <br />vegetation to establish in these special locations, adding an additional dimension of potential vegetation <br />community diversity. Topsoil depth variability will be applied in all practical locations to maximize plant <br />community diversity in areas designated for grassland. Because the volume of topsoil to be applied to <br />sagebrush steppe targeted areas is much less, and the creation of a seedbed conducive for shrub <br />establishment is of major importance, the variability of topsoil depths within these areas may be limited. <br />However, wherever practical, Colowyo will also make attempts to vary topsoil depths in the Sagebrush <br />Steppe areas as well. Colowyo will ensure proper topsoil resource management through annual analysis <br />of the topsoil balance in stockpiles, the expected areas for the following year's reclamation focus, the total <br />disturbance area, and the results of topsoil stripping activities each year. Topsoil redistribution criteria <br />specific to sagebrush steppe areas are defined further on in this section. <br />Starting in 2005, Section 11 of the Annual Reclamation Report presents a summary of topsoil stockpile <br />volumes and a table showing the average topsoil replacement depth for each reclamation polygon, and <br />information on overall topsoil balance. <br />Collom — Rule 2, Page 86 Revision Date: 11/16/16 <br />Revision No.: MR -166 <br />