2011-11-22_REVISION - C1992081 - Laserfiche WebLink

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Existing topsoil stockpiles were inventoried in November 1992 to confirm volumes and suitability of stockpile material. Results of this inventory are located in Attachment 9 -1 of the permit. Approximately 55,100 cubic yards of soil material have been stockpiled. Analyses of the stockpiled material indicate elevated SAR and increased salinity levels at lower depths of topsoil piles #1 and #3. Due to these factors, somewhat less than the 55,100 cubic yards of the stockpiles topsoil material will be redistributed on disturbed areas during reclamation. This volume will allow for replacement depths of 6 to 9 inches over 54 acres of disturbance. Three soil mapping units were identified during a Soil Conservation Service survey. They consist of Spicerton variant, an unnamed soil type occurring along the first terrace of Dry Creek, and Morapos soil types. The Spicerton variant soil exhibits elevated SAR values below 1 -inch depth and high EC levels below 8 inches. The Spicerton variant soils are not recommended for topsoil salvage. Ci Tile iviuiapuJ Solis (7C) and the uiniailieu soil mapping unit (5AI) have loamy to silty clay loam textures and no limiting characteristics in the surface horizons. The Morapos soil is salvageable from 0- to 9- inch depths while the unmade soil is suitable for topsoil salvage from 0 to 24 inches. An addition soil mapping unit, an additional Morapos soil type (7B), is identified for TAHR soil salvage. Approved new disturbance associated with the reopening operations at the Loadout is limited to 0.2 acres associated with the construction of haul road HGLF -HR2. This proposed disturbance is within the Disturbed Lands, Topsoiled mapping unit. HGT will salvage all suitable topsoil prior to construction of haul road HGLF -HR2. Topsoil replacement will occur at the conclusion of the operation once facilities have been dismantled and the land recontoured to blend with the surrounding topography. Structures that will remain following reclamation include Routt County Road 37 and US Highway 40. The right -of -ways along these roads account for 3.3 acres and will not be topsoiled. No specific approvals are being granted concerning topsoil removal, storage and redistribution. V. Sealing of Drilled Holes and Underground Openings — Rule 4.07 Sealing of wells, holes, and other openings is discussed in Tab 23, Attachment 23 -3 of the permit application. HGT sealed well 22772-F in 2007. HGDAL1 and HGDAL2 were no longer used for ground water monitoring and were sealed in 2007. Well abandonment reports were submitted to the Division by HGT in November 2007. A. The Division will require that each hole, well, or other underground opening be capped, sealed, backfilled, or otherwise properly managed (4.07.3). Hayden Gulch Loadout 26 November 22, 2011