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<br />top size 18 inches. Final sediment pond(s) will hold a minimum of 10 acre feet prior to <br />spillway operation with a minimum 1 foot freeboard. <br />Average Annual Sediment loss from the disturbed area. <br />The highwall and final pit floors will generate relatively small amounts ofsedintent loss <br />due to lack of soils in the upper elevations and the large sediment basin design of the <br />final pit floor configuration. The sediment pond structures lying east of the final pit <br />configuration may receive as much as 300 tons of sediment per year, which will be <br />removed from the sediment ponds by the mine operator as necessary. <br />Impact on Property Owners to the East of Proposed Acreage Addition <br />The mine operator anticipates that no impact on neighboring property owners to the east <br />of the proposed amended acreage area. The USBLM and Colorado DOW have lands <br />lying directly east of this area. Both parties will be notified of this amendment amd will <br />the opportunity to respond if there are concerns. <br />Tezak Heavy Equipment Company anticipates that construction of all sediment control <br />features will occur within 120 days of permit approval or prior to any mining activity in <br />any area within the watershed zone or proposed mining area. <br />The installation of sediment ponds to control stormwater run-off from the amended <br />acreage area will be permanent structures built to provide long term sediment and erosion <br />control of mining lands tiom stormwater runoff T.H.E. proposes to leave the sediment <br />ponds in place after final reclamation of the pit floor area located west of the sediment <br />ponds. Construction cost estimates for sediment pond installation are in the range of <br />$15,000.00. T.H.E. considers the bonded amounts for surplus equipment that are <br />presently in place ($3000) to be sufficient without further increase. <br />Tezak Heavy Equipment Company will desist from any disturbance of the amended <br />acreage until it has received DMG approval of an acceptable plan for minimizing <br />impacts to the hydrologic balance in the quarry and surrounding area during storm event. <br />The operator believes that current stormwater control systems and their successful <br />operation during recent large storm events is the best proof of effective environmental <br />control currently in place at the site. <br />TIMETABLE FOR AMENDED ACREAGE <br />Highwall Area West 30 acres 5-15 years 2000-2015 <br />Final Pit Area Central 40 acres 15-35 years 2015-2035 <br />Sediment Pond/Borrow Area 7l acres i-35 years 2001-2035 <br />10 <br />