2003-09-10_REVISION - M1992069 - Laserfiche WebLink

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STATE OF COLORADO DIVISION OF MINERALS AND GEOLOGY Department of Natural Resources 1313 Sherman Sc, Room 215 C O L D RA D O Denver, Colorado 80203 D I V I S I O N o r Phone: (303) 866-3567 MIN & A L $ FAX: (303) 832$106 GEOLOGY September 1Q 2003 RF SAFETYI9CIENCFNG William Schenderlein aiu ovens Applegate Group Inc. Governor , 1499 W. 120th Ave., Suite 200 Greg E. Walther Denver, CO 80234 Executive Director Ronald W. Cattany Division Director RE: Ag~regate Industries - WCR, Inc. File No. M-1992-069 Natural Resource Trustee 83 Joint Venture 112(c) Technical Revision TR-005 Adequacy Review Deaz Mr. Schenderlein, The Division of Minerals and Geology ("Division") has reviewed the 83rd Joint Venture 112 (c) Technical Revision, TR-005, Application, File No. M-1992-069. The Division believes that the changes proposed in TR-005 may affect interests of individuals and agencies beyond those of the DMG, and that the changes involved in the TR in effect significantly change the parameters of the reclamation plan and the end land use of the pemut azea, and merit that the request be submitted to the DMG in the form of a permit amendment. Therefore, the changes specified in TR-005 must be submitted for review by DMG in the form of a permit amendment. The fee that was submitted with TR-005 can be credited towazds the fee required for a permit amendment if the current TR is withdrawn and a request to credit the fee towazds an amendment is received by the Division prior to the current decision date of September 24, 2003. With this in mind, listed below aze adequacy review comments related to the TR application that would have to be addressed if the request is submitted in the form of a permit amendment: 1. Rule 6.2.1(2) requires that maps be prepared and signed by a registered land surveyor, professional engineer, or other qualified person. The map submitted to the Division was not signed. Please submit the proper, signed map to the Division. 2. The map indicates that the outlet from the lake to the Cache la Poudre River is oriented at 4674 feet, whereas TR- 005 specifies that the outlet is located at 4670 feet. Please clarify this discrepancy. Rule 6.4.7 Exhibit G -Water Information 3. The applicant should be awaze that 3.1.6 (1) of the Constmction Material Rules and Regulafions requires that disturbances to the prevailing hydrologic balance of the affected land and to the surrounding area and to the quantity and quality of water in surface and groundwater systems both during and after the mining operation'and during reclamation shall be minimized. The TR does not specify whether the addifional water in the lake resulting from runoff will have the potential to raise the water level enough to flood the wetlands located to the north of the lake. Therefore potential impacts to the wetlands have not been addressed. Please indicate what potential impacts to the wetlands may result from the proposed changes at the site. 4. The TR application indicates that an existing outlet from the eastern pond will serve as an exit point for excess water in the pond during a 100-yeaz flood event. Although the TR application specifies that the projected outflow from the outlet to the Cache la Poudre River during a 100-year storm event is estimated to be 150 cfs, the Division has no data as to how this outflow compazes [o potential outflow if the site is reclaimed under the current plan. Additionally the DMG was supplied with minimal data as to how the 150 cfs figure was calculated and is unable to verify that Office of Office of Colorado Mined Land Reclamation Active and Inactive Mines Geological Survey