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8120 Gage Street • Frederick, CO 80516 <br />Bus.: (303) 666 -6657 • Fax: (303) 666 -6743 <br />November 9, 2012 <br />Colorado Office of Mined Land Reclamation <br />Division of Reclamation Mining and Safety <br />ATTN: Peter Hays, Environmental Protection Specialist <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />Tl� � 2 <br />RECEIVED <br />NOV 0 9 2012 <br />DIVISION OF RECLAMATION <br />MININGAND SAFETY <br />Subject: Technical Revision — Varra Companies, Inc. <br />Western Sugar Reclamation Land Development Project - DRMS File No. M- <br />2010 -049 <br />ATTACHMENTS: <br />• Technical Revision Submittal Fee — Check #: 32391 in the Amount of $216.00. <br />• Proof of Placement — Weld County Clerk to the Board <br />• Flood Analysis <br />• Riprap Design Memo SCANNED <br />• Riprap Design Spreadsheet Calculations <br />• Technical Revision — Map <br />This Technical Revision (TR) is intended to satisfy the concerns expressed in the September 21, <br />2012 meeting and now withdrawn TR -01. Two copies of the TR are included along with the <br />required fee and proof of placement with the Weld County Clerk to the Board, and related <br />attachments (see above). <br />As part of this Technical Revision, we will be bonding for the replacement of <br />embankment material should a flood event occur that would erode the pit walls during the course <br />of mining. The enclosed riprap design will be the final mitigation for erosion of pit walls post <br />mining, and will be installed as a part of the final reclamation. <br />Embankment material required for erosion event during mining <br />Dimensions taken from Best Case in table 1 in Western Sugar Reclamation Land Development <br />Project Flood Analysis <br />N(1V 09 2012 <br />DIVISION OF RECLAMATION <br />k uiwtirz etin CACCTv <br />