REV12273 - Laserfiche WebLink

Home Browse Search

III IIIIIIIIIIIII III ~ ~ STATE OF MINED LAND RECLAMATION DIVISION Department of Natural Resources 1313 Sherman St., Room 215 Denver, CO 80203 303 8663567 FA x: 303 832-8106 DATE: June 21, 1990 T0: Bruce Humphries FROM: Tom Schreiner /^ ~ RE: Alma Placer - Remaining Concerns for Permit Amendment - File No. M-85-029 OF COQ ti~ q9 :`qg ' /676' Roy Romer, Governor Fred R. Banta, Division Director I have reviewed the final adequacy response submitted by Reclamat on Resources, Incorporated on June 8, 1990. Based on the informatio submitted as of June 8 I recommend a denial of the request for a permit ame dment. The basis for this recommendation is failure to demonstrate compliant with Rule 6.2 which states that disturbances to the prevailing hydrologic b lance of the affected land and of the surrounding area both during and after t e mining operation shall be minimized. As you may recall, RRI has proposed the use of an RMS-Ross Series 500 - Sluice Box requiring up to 10,000 gallons per minute, and has designed a mining operation with no discharge to the Middle Fork of the South Platt River. Information required by the Division to make a finding of compliar{ce with Rule 6.2 is as follows: 1. A sediment and drainage control plan for each phase of the mining operation which verifies that runoff waters from the d sturbed area will be routed to the recirculation pond or an approxi ately sized sedimentation pond. Sediment and drainage control for Phase I of the opera ion should include, at a minimum, diversion ditch design to the r circulation pond for the west boundary beginning at Access Road A nd the south boundary along Access Road B, design and flow capacity of the water diversion from the Columbia Ditch to the Recirculation Pond, and alternative sediment controls such as straw bales, sil fences,or erosion control fabric to be used along the 'toe of the embankment. The sediment and drainage control plan should include map showing the location of these structures and design and sizing of collection ditches. This information is necessary to make the finding that~all runoff waters within the disturbed area will be contained on ite. 2. Recirculation pond design which incorporates a minimum freeboard of 1.0 foot from the crest of the embankment. The follow ng information should be submitted to make the finding th t the pond will be a non-discharging structure.