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2018-03-20_PERMIT FILE - C1981019A (3)
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2018-03-20_PERMIT FILE - C1981019A (3)
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Last modified
6/12/2018 7:38:33 AM
Creation date
4/25/2018 6:42:45 AM
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Template:
DRMS Permit Index
Permit No
C1981019A
IBM Index Class Name
Permit File
Doc Date
3/20/2018
Doc Name
Volume 1 Rule 4
Section_Exhibit Name
4.02 Throuugh 4.30
Media Type
D
Archive
Yes
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RULE 4 PERFORMANCE STANDARDS <br />The raw water pipeline to the Collom operation will be routed across Taylor Creek through an elevated <br />structure. An elevated structure minimizes impacts within the stream buffer zone versus other routing <br />options such as boring the pipeline under Taylor Creek, which requires large trenches and greater ground <br />disturbances for equipment to bore under both sides of Taylor Creek. With the elevated structure small <br />disturbances will occur within the stream buffer zone of Taylor Creek. Prior to ground disturbing <br />activities proper best management practices (silt fence or other suitable sediment control measures) will <br />be installed. Topsoil will be windowed and concrete footers will be poured which will provide the base <br />for the structural stability needed to support the pipe over Taylor Creek. Once the pipe and structure steel <br />is installed the limited disturbance areas have the topsoil windrows spread back out and the areas will be <br />seeded. Sediment will be controlled during the construction of these structures and will negate any <br />impacts to Taylor Creek while the ground is disturbed. The sediment control structures will be left in <br />place after reclamation until a suitable vegetative cover has been achieved. The water pipe line and <br />associated infrastructure will not create any long term impacts to Taylor Creek. <br />For a discussion on stream buffer zones from Wilson Creek, Jubb Creek, and Little Collom Gulch please <br />see Volume 15, Section 4.05.18. <br />4.06 Topsoil <br />4.06.1 General Requirements <br />Before the disturbance of any area, topsoil is removed and segregated from other material. Upon removal, <br />this material is either immediately redistributed on regraded areas or stockpiled in locations shown on the <br />Topsoil Handling Maps 28 and 28A. <br />4.06.2 Removal <br />All topsoil, as classified in section 2.04.9, is removed from areas to be affected by the surface coal mining <br />operations. The graphical representation of the topsoil removal is shown on the Topsoil Handling Map <br />(Map 28 and 28A). This map has been greatly simplified from that of the original application to reflect <br />actual on -the -ground operations. The techniques for removal of woody plant materials that otherwise <br />would interfere with the usefulness of the topsoil is discussed in Section 2.05.3 <br />The average thicknesses for each soils series: to be removed can be found in the legend of the Soils - <br />South Map (Map 6). Removal techniques for topsoil is described in Section 2.05.3. <br />A variance from topsoil removal was requested and approved by the Colorado Division of Reclamation, <br />Mining and Safety for the following areas; construction of small structures such as power poles, signs or <br />fence lines, areas of light traffic that do not destroy existing vegetation or cause erosion and areas where <br />removal would result in needless damage to soil characteristics such as sediment control ditches and small <br />water diversions. In most cases, especially on steep slopes, removal of topsoil prior to ditch construction <br />needlessly damages large areas of topsoil, along with the adjacent natural vegetation. Implementation of <br />the technique of cutting the ditches directly into the hillside without topsoil removal will limit needless <br />topsoil disturbance, reduce unnecessary destruction of adjacent vegetation and will facilitate reclamation <br />of the ditches at a future date. <br />It should also be clarified that consistent with Map 6, Soils — South and Exhibit 9, Volume 19, there will <br />be small areas of rock outcrop, rocky steep slopes, etc. where the topsoil depth is 0 inches. Where this <br />occurs there will not be an attempt to recover topsoil or otherwise disturb the area before disturbance by <br />mining. <br />Rule 4 Performance Standards 4-23 Revision Date: 1/31/18 <br />Revision No.: TR -119 <br />
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