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Ellicott Sand & Gravel LLC Page 2 <br />Bank Armoring Plan (June 26, 2020) <br />Reservoir Bank Armoring. <br />Armoring will be placed inside of the mined areas adjacent to the <br />South Platte River channel (Phases 1 and 2) and along the <br />downstream side of the lateral berm between those areas. The <br />armoring will be placed on the slopes starting from the existing <br />ground surface elevation. The toe of the armoring will be a <br />minimum of 5 feet below the river thalweg, have a 3h to 1v slope <br />and will be 2 feet or more thick. This is approximately 2.35 <br />cyd/lft along the excavation bank slopes. Once sloping begins, <br />the armoring will be installed on 1,000 foot sections until <br />completed. This will leave an armored face along the top of the <br />bank and the slope into the reservoir that is 35 feet wide. <br />Supplied supporting documents <br />Figure 1 - Bank Protection Plan cross section (revised) <br />Safety factor calculation page