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4 FACILITY DESCRIPTION <br />4.1 DESIGN CONCEPTS <br />Portions of the Site have been mined for aggregate, and in its current condition the Site <br />is not conducive to using the land for future development. BSG has been in the <br />aggregate mining and construction business for over 38 years and has the experience to <br />safely and efficiently mine and fill the Site. Existing Site materials and imported inert <br />materials will be used to fill the Site. The fill area has an estimated fill volume of 1.1 <br />million cubic yards and the facility is expected to be in operations for, at least, 23 years. <br />The Site will be reclaimed to elevations that will be usable in the future for rangeland or <br />other uses and will conform to the previously approved reclamation plan. An advantage <br />to this Site is that the much of the currently disturbed portion of the Site land will be <br />reclaimed and the inert fill materials will not use valuable airspace at, a typical municipal <br />solid waste disposal facility. <br />The Bennett Sand & Gravel Pit #2 Fill Site has the following characteristics: <br />• No putrescible waste will be placed <br />• No typical municipal solid waste will be placed <br />• No methane generation from decaying organic matter <br />• No construction demolition debris will be placed <br />• Inert fill materials placement, exclusively <br />4.2 EXCAVATION PLAN <br />Excavation/aggregate mining at the Site is currently taking place in a general north to <br />south sequence. Excavating/mining activities are being advanced to approximately 50 <br />feet below ground surface (bgs). This is a dry pit operation and no excavations will be <br />advanced below the water table, which is approximately 60 feet bgs. <br />Prior to mining related excavating activities, surficial material (approximately 1 foot) and <br />any overburden material, not conducive to use as aggregate, is stripped and stockpiled <br />on-site for future Site reclamation use. Reclamation material stockpiles will be located in <br />areas outside of the excavation areas. These stockpiles may be seeded, as required, to <br />minimize erosion prior to use in Site reclamation. <br />The excavation set -back related to the Kiowa Creek floodplain (Section 3.4.2) will be <br />maintained, and this set -back area may be used for reclamation materials stockpiles. <br />Bennett Sand & Gravel Pit#2 Inert Fill Page 9 of 30 <br />MOLEN & ASSOCIATES, LLC August 3, 2015 <br />