Laserfiche WebLink
June 29, 2011 <br />Dear Mr. Cunningham, <br />RECEIVED <br />PUBLIC WORKS DEPARTMENT <br />JUI <br />1111 H STREET, P.O. BOX 758 <br />Division of Reclamation, GREELEY, COLORADO 80632 <br />Mining & Safety WEBSITE: WWW.CO.WELD.CO.US <br />PHONE: (970) 356 -4000, EXT. 3750 <br />FAX: (970) 304 -6497 <br />1.411,c e <br />RECEIVED <br />Colorado Division of Reclamation, Mining, & Safety <br />JUL 0 5 2011 <br />.Attention: Michael Cunningham <br />1313 Sherman Street, Room 215 ',Division 01 riecomation <br />Denver, CO 80203 It/ Mining and SafetY <br />Re: Carma Bayshore LLC, St. Vrain Lakes, Filing 1, Slurry Wall Permit No. M -19 82- <br />015 <br />Weld County Public Works has recently become aware of a pending reclamation <br />release request from Carma Bayshore LLC (Carma), for its slurry wall activities at the <br />Siegrist gravel pits located in or about section 25, T3N, R68W. The mining activity has <br />impacted the way in which the FEMA mapped floodplain functions. <br />FEMA requires that changes such as 100 -year flood water surface elevations, floodplain <br />boundaries, and floodway boundaries be documented and accepted through their Letter <br />of Map Revision process (LOMR). The Federal Regulations that apply include but are <br />not limited to the following and can be found in: 44CFR 60.3(b)(3), 60.3(b)(7), and 65.3. <br />The mining and slurry wall activity has potentially impacted the hydrologic balance and <br />function of the St. Vrain River. DRMS Rule 34- 32.5- 116(4)(h) requires that changes to <br />the hydrologic balance of the affected land be minimized. Since the function of the <br />floodplain is a piece of the hydrologic balance, we request that Carma show what <br />impact their mining activity has had on the 100 -year flood water surface elevations and <br />floodplain functions. To date, Carma has not finalized the LOMR process that they <br />started with the planning of the St. Vrain Lakes Subdivision. Additionally, they have not <br />provided evidence to Weld County or the.DRiviS showing how their mining and <br />reclamation activities have impacted the 100 -year flood water surface elevations. <br />DRMS Rule 34- 32.5- 116(4)(i) requires that areas outside of the affected land shall be <br />protected from damage occurring during the mining operation and reclamation. As <br />stated above, Carma's mining and reclamation activities may have changed the <br />conveyance of the floodplain in the 100 -year flood. Since the currently mapped <br />floodplain extends beyond Carma's property, the potential exists for surrounding <br />property owners to be impacted or even damaged by the mining and reclamation <br />activities that have occurred on Carma's property. To date, Carma has not provided <br />any evidence to Weld County or the DRMS showing how their mining and reclamation <br />activities have not impacted property owners within the mapped 100- year .floodplain. <br />Page 1 of 2 <br />M: \PLANNING °• DEVELOPMENT REVIEW,tJSR -Else by Special Review \USR -489 Siegrist Pit \USR.489 DRMS Letter 6- 29- 2011.docx <br />1Z03 <br />