Laserfiche WebLink
Existing topsoil stockpiles were inventoried in November 1992 to confirm volumes <br />and suitability of stockpile material. Results of this inventory are located in <br />Attachment 9-1 of the permit. Approximately 55,100 cubic yards of soil material <br />have been stockpiled. Analyses of the stockpiled material indicate elevated SAR <br />and increased salinity levels at lower depths of topsoil piles #1 and #3. Due to these <br />factors, somewhat less than the 55,100 cubic yards of the stockpiled topsoil material <br />will be redistributed on disturbed areas during reclamation of the facilities area. <br />This volume will allow for replacement depths of 6 to 9 inches over 54 acres of <br />disturbance. In regards to the Tie -Across Haul Road, approximately 9 inches of <br />topsoil will be spread of this disturbed area. <br />Three soil mapping units were identified during a Soil Conservation Service survey. <br />They consist of Spicerton variant, an unnamed soil type occurring along the first <br />terrace of Dry Creek, and Morapos soil types. The Spicerton variant soil exhibits <br />elevated SAR values below 1 -inch depth and high EC levels below 8 inches. The <br />Spicerton variant soils are not recommended for topsoil salvage. The Morapos soils <br />(7C) and the unnamed soil mapping unit (5AI) have loamy to silty clay loam <br />textures and no limiting characteristics in the surface horizons. The Morapos soil is <br />salvageable from 0- to 9- inch depths while the unnamed soil is suitable for topsoil <br />salvage from 0 to 24 inches. An addition soil mapping unit, an additional Morapos <br />soil type (713), is identified for TAHR soil salvage. <br />Topsoil replacement occurred once facilities were dismantled and the land re <br />contoured to blend with the surrounding topography in 2011. DRMS verified <br />topsoil replacement thickness during an April 26, 2012 inspection. Seven holes <br />were hand dug with a shovel on the topsoiled area. This area was found to have a <br />mean topsoil replacement thickness of 14.5 inches. Topsoil replacement thickness <br />of 6 to 9 inches is approved in the PAP. <br />The rail loop, sediment ponds, and TAHR have not been reclaimed at the time of <br />this writing. Structures that will remain following reclamation include Routt County <br />Road 37 and US Highway 40. The right-of-ways along these roads account for 3.3 <br />acres and will not be topsoiled. <br />No specific approvals are being granted concerning topsoil removal, storage and <br />redistribution. <br />V. Sealing of Drilled Holes and Underground Openings — Rule 4.07 <br />Sealing of wells, holes, and other openings is discussed in Tab 23, Attachment 23-3 of <br />the PAP. <br />HGT sealed wells 22772-F, HGDALI, and HGDAL2 in 2007. Well abandonment <br />reports were submitted to the Division by HGT in November 2007. HG Shallow Well <br />No. 1 was sealed in November 2011. The well abandonment reports are located in <br />Appendix 7-14 of Tab 07. <br />25 <br />