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The disturbed areas will be reclaimed when there is no longer potential for further <br /> disturbance from adjacent mining operations so their areal extents will probably vary. <br /> The temporary stormwater controls will be maintained in all disturbed areas until <br /> revegetation is completed and the closure requirements are fulfilled. <br /> (e) An approximate timetable to describe the mining operation <br /> (i) Mining of the sand and gravel deposit is scheduled to commence <br /> approximately July 1, 2023 or once application is approved with the Division <br /> of Reclamation, Mining and Safety and end approximately July 1, 2033 or <br /> later if pit resources are still available. This proposed pit is intended to be an <br /> intermittent operation as defined in C.R.S. 34-32.5-103(11)(b) since <br /> construction material reserves will not be mined for more than 180 days per <br /> year. Measures will be taken to comply with reclamation and other necessary <br /> activities as established by the board to maintain the operation within <br /> compliance of the Division rules. <br /> (ii) An approximate 1-2 acreage size will be worked each year. Mining activity <br /> will commence near the southern middle of the mining site and move towards <br /> the north. <br /> (iii) As acres of disturbed area are affected, reclamation of the disturbed area will <br /> begin to prevent topsoil damage and erosion control. There will be constant <br /> monitoring of slopes and surface conditions throughout each phase of mining. <br /> The mined resources will be transported off-site as they are needed, which is <br /> expected to vary. Mining will continue until the gravel resources are depleted. <br /> A timetable is not included since the rate of use of the resources is dependent <br /> on County needs. <br /> (f) Nature, depth and thickness of the deposit to be mined and the type of <br /> overburden to be removed and stratum <br /> (i) The deposits are relatively uniform as described in Exhibit J. The excavation <br /> thickness will be up to approximately 30-feet. The overburden is limited to the <br /> topsoil's that will be removed and stockpiled for reuse during the reclamation <br /> process. <br /> (ii) The nature of the stratum immediately beneath the material to be mined in <br /> sedimentary deposits is consistent in each layer. The layers consist mostly of <br /> gravel that are not too sandy, but not too rocky to apply directly to County <br /> Road surfaces. <br /> D-2 <br />