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Ellicott Sand & Gravel LLC Page 2 <br /> Bank Armoring Plan (Revised Oct 31,2019) <br /> if flooding occurs and within the 150 foot setback so it is close <br /> to the area where it will be placed. <br /> The attached Figure 1 shows the cross sections of the areas <br /> discussed below and details of the armoring to protect the banks <br /> along Black Squirrel Creek and Big Spring Creek. Map Exhibit F - <br /> Reclamation Plan Map has been revised to show the location of the <br /> areas to be armored in the mine. <br /> Channel Bank Armoring. <br /> Along the banks of Black Squirrel Creek and Big Springs Creek <br /> bank-m armoring will be placed wherever mining will take place <br /> within 400 feet of the bank. The armoring will be done as mining <br /> advances in each stage so that if mining ended along the channels <br /> before mining reached the 400 foot line no armoring would need to <br /> be done . As mining approaches the 400 foot limit the channel <br /> adjacent to mining area will be armored following the UDFCD <br /> Guidelines . <br /> Bank armoring will be done, using the concrete recycle material <br /> described above. The armored face of the bank will extend to 5 <br /> feet below the thalweg of the dry channel to the top of the <br /> existing bank and will be a minimum of 2 feet thick. This will <br /> leave an armored face along the surface that is 29 feet wide . On <br /> average this will require 2 . 77 cu-yds per linear foot . The <br /> armoring will not take place in the OHW but rather along the <br /> historic bank of the creeks . The face of the armoring will be <br /> sloped 2 . 5h to lv per the guidelines . <br /> Excavation Bank ArmorincT. <br /> On the inside of the mined area adjacent to the creek channels <br /> the armoring will be placed from the existing elevation so the <br /> toe of the armoring will be a minimum of 3 feet below the creek <br /> thalweg and will be 2 feet or more thick. This is approximately <br /> 1 . 64 cyd/lft along the excavation bank slopes . The armoring will <br /> cover the bank slopes from the original ground surface to a depth <br /> of 3 feet below the channel thalweg and parallel to the channel . <br /> Once sloping begins the armoring will be installed on 500 foot <br /> sections until completed. This will leave an armored face along <br /> the surface that is 27 feet wide. <br /> Supplied supporting documents <br /> Figure 1 - Bank Protection Plan cross section (Revised 10-30-19) <br />