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eN4,1:1© <br /> March 25. 2016 <br /> Mr. Peter Hays AGGREGATE <br /> Environmental Protection Specialist <br /> INDUSTRIES <br /> Division of Reclamation, Mining and Safety <br /> 1313 Sherman Street. Room 215 <br /> Denver. CO 80203 <br /> Re: Permit No. M-1989-029— Longmont Distel Operations <br /> Amendment Application <br /> Dear Peter: <br /> The original and one copy each of this letter, together with documents referenced herein. and a <br /> completed reclamation permit application form. are submitted as Aggregate Industries' request <br /> for an amendment to Permit No. M-1989-029—Longmont Distel Operations. Also enclosed is <br /> Aggregate Industries' check in the amount of$2.229.00 for the application fee. <br /> This revision proposes to update the reclamation plan to reflect the current landscape of the <br /> Longmont Distel Operations site and to identify remaining areas for post-mining reclamation and <br /> areas for flood restoration following the catastrophic flood event throughout the St. Vrain Creek <br /> watershed in September 2013. The enclosed Exhibit F-1 — Post 2013 Flood Conditions, <br /> Restoration, Improvements and Remaining Post-Mining Reclamation identifies these areas. <br /> During the September 2013 flood. St. Vrain Creek breached its channel north of the Longmont <br /> Distel site and began flowing to the south of its original channel and throughout the majority of <br /> the site. Primary flows currently continue to naturally flow in braided channels throughout the <br /> site. It has been determined that St. Vrain Creek will not naturally return to its pre-flood channel <br /> and that it should be allowed to remain in its current location. The City of Longmont ("City'or <br /> "Longmont"). with public input as well as input from Colorado Parks and Wildlife, determined <br /> that leaving the main flows of the creek through the site would provide ecological benefits by <br /> allowing wetland vegetation to establish and improving water quality in the creek. <br /> This revision does not propose to change the currently approved post-mining land use. which is <br /> wildlife habitat and recreation. Aggregate will continue to reclaim lands affected by its <br /> operations that were not impacted by the flood in accordance with the currently approved <br /> reclamation plan(identified as Remaining Reclamation on Exhibit F-1). <br /> Aggregate Industries <br /> West Central Region,Inc. <br /> 1687 Cole Boulevard,Suite 300 <br /> Golden,CO 80401 <br /> An Equal Opportunity Employer <br /> Telephone:303-985-1070 <br />