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,~. <br /> <br />Mr. Dave McMlndes -3- April 4, 1984 <br />Sediment control at the Middle Creek pit during reclamation operations is an <br />item of concern, because the plans in the permit application are vague. <br />Currently the pit serves as a sediment control facility so once backfilling <br />begins it is questlonaDle whether the pit will adequately control sediment. <br />Therefore, a description and timetable for the construction of the Middle <br />Creek "detention basin" needs to be addressed as well as sediment control <br />during the backfilling and grading operations at the Middle Creek pit.. <br />The backfilling and grading plans for the Energy No. 3 detention basin were <br />discussed. There was no discussion in the permit application about the <br />100,000 yd3 of material that w1]1 be needed to fill the Energy No. 3 <br />detention basin. Colorado Yar~pa Coal Company stated it would come from the <br />surrounding area. A map and description of this will be provided. The plan <br />should include the depth and extent of material that will be needed from the <br />surrounding area. As stated previously 1n this letter, if Colorado Yampa Coal <br />Company is planning to do this, this spring the information must be provided <br />before Colorado Yampa Coal Company begins the backfill operations. <br />The proposed permanent detention basins were reviewed under the criteria for <br />sediment ponds. During the meeting however, CYCC stated that they were <br />considering treatment facilities. This was not stated in the permit <br />application and needs to addressed. It 1s the Dtvisiort's feeling however, <br />that it would be more appropriate to consider the detention basins sediment <br />ponds during operations and that they be designed to meet the requirements of <br />Rule 4.05.6.needs to be addressed 1n the permit application. <br />As stated previously the best way to resolve the reclamation and permitting <br />questions is for CYCC to submit the responses to the adequacy review by the <br />end of Apr11. The Oivislon has staff time available to review the information <br />at the beginning of May. <br />I encourage you to call me if you have any questions or concerns regarding <br />this letter. <br />Sincerely, <br /> <br />Sandra L. Emrich <br />Reclamation Specialist <br />SLE/eap <br />cc: D. Larry Damrau <br />Doc. No. 0535 <br />