Laserfiche WebLink
<br />February 23, 1994 <br />He. Shorn E. Smith <br />Reclamation Specialist <br />Division of Hinerale and Geology <br />1313 Sherman St. Room 215 <br />Denver, CO 80203 <br />RE: HR-23 Quarterly Inspection of all Impoundments <br />Keenesburq Hine C-81-028 <br />Dear Hs. Smith: <br />The Division has requested that Coors Energy Company (CEC) return to <br />quarterly pond inspections, by a qualified registered P.E., or other <br />qualified individual under the direction of a qualified registered <br />• P. E. . <br />As you knor, the Keenesburq Hine is unlike other mines in the State <br />of Colorado for these reasons: <br />Tro sandy soils make up most of the site. The Valent and <br />Oscood sands are found to a depth of approximately 30 feet. <br />Permeability ie rapid to moderately rapid. Available rater <br />holding capacity is moderate to lor. Surface runoff is very <br />slor and rater erosion hazard is lor. Wind erosion hazard <br />is high on disturbed areas. (Permit, Volume II, Appendix H) <br />* After 13 years of operation sediment pond !~2 has never <br />accumulated more than one foot (1') of water and has within <br />one or two days returned to empty. The operator can only <br />remember a couple of times when water accumulated in the <br />pond. <br />* Over the last 13 years sediment level in Pond N2 is <br />practically nothing. Wind blow, erosion tram maintenance <br />activities make up the maiority of the present sediment. <br />Further, because no measurable water has accumulated in <br />Sediment Pond k2 for long periods of time and'has never <br />discharged, ell other ponds have been removed from the plan <br />. and the NPDES permits were deactivated. GEC is confident <br />that there will never be a discharge from the sight. <br />iP7- <br />