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Home My WebLink About20123558.tiff RECEIVED DEC 1 4 2012 1 Y • r • WELD COUNTY COMMISSIONERS 8120 Gage Street • Frederick, CO 80516 Bus.: (303) 666-6657 • Fax: (303) 666-6743 December 13, 2012 Weld County Clerk to the Board 915 10th Street, 3rd Floor Greeley, Colorado 80632 Subject: Varra Companies, Inc. —Western Sugar Reclamation Land Development Project Technical Revision Application—Permit M2010-049 Materials submitted to the Colorado Division of Reclamation Mining and Safety (CRMS)— Office of Mined Land Reclamation (OMLR): ATTACHMENTS: • Proof of Placement—Weld County Clerk to the Board • Technical Revision 02 Adequacy Review Response Letter • Technical Revision 02 - Exhibit F - Reclamation Plan - Supplement • Technical Revision 02 - Exhibit F - Reclamation Plan - Supplement- Typical Sections • Tank Battery Photos Your signature below acknowledges receipt of the above referenced material, as attached. The material should be added to the above referenced Application, as originally submitted to the Weld County Clerk to the Board, and made accessible for public review. Received On r a, 112a,e- 11 , 2012 By: c j 1) A Office of the Weld County Clerk to the Board of County Commissioners 2012-3558 46i� la ( t, • 113 !� � 13- RECEIVED DEC 1 4 2012 A Rf WELD COUNTY COMn41SSIONERS I MPAN $ S 812(1 Gage Street • Frederick, CO 80516 Bus.: (303) 666-6657 • Fax: (303) 666-6743 December 13, 2012 Colorado Office of Mined Land Reclamation Division of Reclamation Mining and Safety ATTN: Peter Hays, Environmental Protection Specialist • 1313 Sherman Street, Room 215 Denver, Colorado 80203 Subject: Technical Revision No, 2 (TR-02) Adequacy Review Western Sugar Reclamation Land Development Project - DRMS File No. M- 20I0-049 Peter, Please find our responses to your adequacy review concerns for the subject Technical Revision No. 2 below. The responses arc denoted in hold italics. 1. Rule 6.2.1(2) requires maps he signed by a registered land surveyor, professional engineer, or other qualified person. The maps submitted to the Division were not signed. Please resubmit signed copies of the maps. Maps are now signed. 2. The Division's engineering staff reviewed the October 8, 2012 Flood Analysis prepared by Flow Technologies, LLC, and the November 9, 2012 riprap sizing analysis prepared by Varra Companies. A copy of Mr. Cazier's memorandum is attached. Please address the comments noted in the memorandum. The comments have been addressed,please see below. 3. The Division will estimate the cost to repair flood damage during mining operations and install the post mining flood control structures at the site based on the information submitted once the Operator addresses the concerns noted in this letter. Noted. 4. Please commit to staying four hundred (400) feet from the tank battery in the northeast corner of Tract C until the design for the hard armoring protection is submitted as a technical revision and approved by the Division. During the course of our September 21, 2012 meeting with DRMS, a few different ideas were proposed and discussed regarding erosion protection. One of these was the possibility of armoring the tank battery. Another one, which is the method we have chosen to use, was to provide a protected point at which we believe potential,floodwaters will enter the site. The thinking behind this option was, that by protecting the point at which floodwaters would enter the site, we would avoid embankment erosion and possible river capture. Likewise, we proposed to provide a protected anvils for which floodwaters eolith move from Tract C to Tract O, and also protect the mil/gas pipes within the embankment between the two tracts. hi revisiting this issue. it was determined by ourselves and our consultant, Mr. Trieste, that the points we have protected should prevent embankment erosion and river capture. Likewise, the pipelines between Tract C and Tract 1)should also be protected from bank erosion and failure. The introduction of floodwaters to this site should not affect the tank battery as a result of our mining activities. The tank battery owner has already constructed what they feel should be adequate surface protections,for their facilities in the event of a flood, and Varra Companies mining activities will not have an effect on these surface protections. Additionally, velocities in the area of the tank battery should be minimal, as the entry pond far the floodwater is on the western side of Tract C and the tank battery is on the eastern side of Tract C. The inclusion alike continent regarding the armoring of the tank battery in the Hood Analysis report was a miscommunication on our end between ourselves and our consultant, and was again misinterpreted by Varra Companies in our proofing of the report to mean the design of the riprap protected weir between Tract (.'and Tract 1)as we have now designed. Please see the included photos of the current.state of the existing tank battery. Also,please see our Statement o f Understanding addressed to Adjacent Surface Owner of Record. dated Thursday, July 29, 2010, which was part of the original application for the Western Sugar project. This document outlines the expectations of our coexistence with adjacent surface owners. This document was sent to all adjacent surface owners by certified return receipt mail, and these were also submitted with our original application for Western Sugar. The hollowing comments are from Tim Lazier, and our responses :ore likewise denoted in hold italic' The Flood Analysis appears adequate. No action required. Noted. 2. The ripnip sizing analysis appears adequate. No action requnrd. Noted_ I'loodway and Erosion Mitigation Map. The map only presents the aerial extent of the proposed riprap. In order to fully understand and evaluate the riprap protection proposed. the DRMS requires sections perpendicular and parallel to the flow directions on Ihe. Tract C and I) weirs. Please provide section that meet the following specifications a. Riprap layer and bedding/granular faller layer thicknesses_ h. Elevation of top of riprap for each weir, C. Profiles in the direction of flow showing how the riprap :and kidding layers lie inlo the proposed reclamation uopographc (above and/or below \vater level). d. Permanent pool water lesels. and e. Section(s)perpendicular to the direction of flow showing how the riprap and bedding layers lie into the proposed reclamation topography. The above requested elements hare been added to the plans. Respectfully. Varna Companies. Inc. • Brad Jones ('iv°il Engineer cc. Christopher I,. Varra, President (lurch Varra. Vice President Van-a Companies. Inc. 7. IA • 4 • • ! • , . • rim ,_ , ♦i/� 11:�� I rats q .,�4.0:01I11- A v21:A, Pli�, 2 rrr I L • '� r d f,. I 1 rbFtil 1' l.; k A I?, pf 'J 3� r p, IA I't,y q•• d c ; ?� L 4 ,„„,• x, .0,. .. ,,,, , 2.. , ......,:y,:. .7! ' , . . l't. J1 ifIft4 - j ' ti , /_ 'aW x • 0;,Y . 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