Laserfiche WebLink
M-2008-017—Broken Arrow Investments, LLC—Derr Pit—Technical Revision Request No.4 <br /> May 1, 2020 <br /> -2- <br /> Change of Depth of Phase 5a: Revision of the existing permit to reflect that surface mining for <br /> the area was from 8'-10' and will now change to a depth not exposing groundwater. <br /> The approved permit has a Phase 5a that showed 8'-10' of depth for initial mining not exposing <br /> groundwater. We are requesting that this be updated to reflect the depth of mining shall be to a depth <br /> not exposing groundwater as the depth to groundwater is greater than the 8'-10' of depth. The bonding <br /> will not need to be increased for Phase 5a as the mining slope is a 3:1 slope which is the same as the <br /> reclamation slope. The bonding for the Derr Pit is currently $2,090,100.00 which includes the <br /> disturbance for Phase 5a so there should not be an increase needed for the existing bond. <br /> Change of grading for disturbed areas: Revision of the existing permit to reflect proposed <br /> grading in disturbed areas on east side of original permit boundary. <br /> The grading on the east side of the existing permit boundary is proposed to be re-graded to utilize <br /> material on the east side for construction aggregates/materials. Slope stability analysis has been <br /> provided to show the 3:1 slope is safe for the east side of the permit boundary. <br /> Broken Arrow Investments, LLC appreciates your consideration of this revision request and looks <br /> forward to your response. <br /> Please feel free to contact me with any questions or comments. <br /> Sincerely, <br /> J.C. York, P.E. <br /> J&T Consulting,Inc. <br /> Attachments: <br /> $216 Check for Technical Revision review fee <br /> Updated Mining Plan Exhibits <br /> Slope Stability Analysis <br /> cc: Broken Arrow Investments, LLC <br /> File <br /> mi 305 Denver Avenue-Suite D•Fort Lupton CO 80621 • Ph: 303-857-6222• Fax: 303-857-6224 <br /> id <br />