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Technical Revision#5 July 19, 2024 <br /> BURNCO Colorado LLC <br /> Rocky Flats Pit- M-1987-113 <br /> BURNCO Colorado LLC (BURNCO) is submitting this Technical Revision (TR5)to propose changes <br /> to the Rocky Flats Pit Reclamation Plan. BURNCO is proposing that the reclamation plan for this <br /> site be revised from Rangeland to lake area. <br /> This is a gravel mine on in parts of the SPA, Section 9,T-2-S, R-70-W 6th P.M.,Jefferson County. <br /> It adjoins the Lakewood Brick and Tile Company Church Pit, (M-1979-045) on the west side. <br /> These mines share an adjoining permit line and when mining ends,their floor will be connected <br /> into on large excavated area. For this reason a Technical Revision is being filed concurrently <br /> with Lakewood Brick to make this change to both Reclamation Plans. <br /> The existing plan calls for reclaiming the slopes to 3H to 1V and revegetating the hole left when <br /> mining ends to Rangeland/Pastureland. It is a dry sand and gravel mine on a terrace deposit <br /> west of the old Rocky Flats Plant. <br /> This proposed change will not alter the reclaimed slopes but will allow the excavated area to <br /> accumulate water from storm events .This change reduces the reclamation required as it <br /> eliminates seeding much of the mine area since the excavated area will be covered by water . <br /> The material has a high clay content that will be ideal for creating a the stable 3h:1V slopes. <br /> No ground water is present at the mine so there will be no impact to the ground water table or <br /> surrounding sub-surface areas. All stormwater currently falling on the mine is discharged under <br /> a Colorado Department of Health and Environment permit to the surface within 72 hours or <br /> water obtained from another source is released into a surrounding drainage to cover the <br /> evaporative losses associated with any standing Stormwater. The water in the excavated area <br /> currently is purchased water stored there for needs at the mine. <br /> Sincerely, <br /> BURNCO Colorado, LLC <br /> Devon Glosser <br />