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RECEIVED <br /> APR 2 6 201:j <br /> DIVISION OF RECLAMATION <br /> ENING Ale SAFETY <br /> April 22, 2016 <br /> Mr. Peter S. Hays <br /> Division of Reclamation, Mining & Safety <br /> 1313 Sherman Street, Room 215 AGGREGATE <br /> Denver, CO 80203 <br /> INDUSTRIES <br /> Re: Permit No. M-1989-120—Platte Valley - Corrective Action Response <br /> Dear Peter: <br /> Aggregate Industries (AI) submits this letter together with the enclosed documents provided by <br /> J & T Consulting, Inc. in response to the corrective action items set forth in the Division's report <br /> of its monitoring inspection conducted at the Platte Valley operation on February 24, 2016. <br /> Backfilling and grading was cited as a possible problem as the Platte River breach and flood <br /> event repair work that was conducted under Technical Revision 5 (TR-05) did not appear to <br /> extend past the shared Consolidated Mutual Perry Pit (M-1990-098) and Aggregate Industries' <br /> Platte Valley (M-1989-120)property line and did not appear to restore the required Aggregate <br /> Industries offset from the property line and pond slope in Phase 3 to the required grade. J & T <br /> surveyed the area and determined that, while the repair extended beyond the property line, it did <br /> not fully restore to the correct setback width. J & T therefore coordinated with Northern <br /> Colorado Constructors, Inc. to add some fill to the slope to achieve the correct setback width of <br /> 25 feet. Enclosed is a drawing provided by J & T which provides the as-built dimensions from <br /> the property line and elevation shots, including toe of slope on the Aggregate Industries property. <br /> Also enclosed is a copy of the seed mixture used by Arnold's Custom Seeding to revegetate the <br /> breach repair area. This addresses the second corrective action item set forth in the inspection <br /> report. <br /> Please contact me at(970) 396-5252 or at connie.davis@aggregate-us.com if you have any <br /> questions or need additional information. <br /> Very truly yours, <br /> evaiie:0 <br /> Connie N. Davis <br /> Land Manager <br /> Enclosures <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 />