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Blue Pit 112 Permit Amendment
<br />Table z: Mining Areas and Quantities
<br />Existing Placement
<br />To be Excavated
<br />(Map C -1 to Map C -26)
<br />To be Placed
<br />(Map C -26 to Map F)
<br />Excess
<br />Topsoil
<br />Gravel
<br />Total
<br />Import/
<br />East
<br />Topsoil
<br />Overburden
<br />Acres
<br />Previously
<br />Topsoil
<br />(@ at 1'
<br />(@ at 4'
<br />109,013
<br />mined
<br />Stockpile
<br />depth)
<br />depth)
<br />202,240
<br />overburden
<br />47,941
<br />7,092
<br />64.57
<br />818,990
<br />105,881
<br />32,380
<br />129,518
<br />65.91
<br />106,335
<br />425,339
<br />4.20
<br />6,776
<br />27,104
<br />To be Placed
<br />(Map C -26 to Map F)
<br />. 134.68 818,990 105,881 145,490 581,962 9,082,266 9,809,718 2,585,724 226,178
<br />*Areal has been already been only partially mined. The disturbed area is 44.5 acres as of 2011. The topsoil and
<br />overburden to be excavated is only for the unmined area.
<br />The material volumes described in Table 2 are approximate but are based on the current operation
<br />and exploration drilling conducted in the area. The life of the mine is estimated at 30 years after
<br />2oo9 and is based on an average annual production of 450,000 tons per year. The estimated raw
<br />gravel production is 9,o82,266 cubic yards or 13,623,399 tons over 30 years. This has been the
<br />average over the past life of the mine but sales are always dependent on demand.
<br />The East Topsoil Stockpile currently has 105,881 cubic yards of topsoil in it. The estimated
<br />additional topsoil to be removed from Area 1 is 32,38o cubic yards, which is calculated at 1 foot
<br />depth over the undisturbed area, which is 20.07 acres. The estimated topsoil to be removed from
<br />Area 2 is 1o6,335 cubic yards, which was calculated at 1 foot depth of the entire surface area. The
<br />estimated topsoil to be removed from Area 3 is 6,776 cubic yards, which was calculated at 1 foot
<br />depth of the entire surface area. The total estimated topsoil to be removed is 145,490 cubic yards.
<br />The total overall topsoil (to be excavated and existing topsoil stockpile) is estimated to be 251,371
<br />cubic yards. The estimated topsoil needed to put back is calculated at 1 foot over the entire surface
<br />area and is 226,178 cubic yards. The difference is topsoil removed and topsoil to be placed is
<br />negligible and will be averaged out over the entire site.
<br />The topsoil volume was estimated using an average depth of 1 foot over the surface area. The
<br />overburden volume was estimated using an average depth of 4 feet over the surface area. Area 1
<br />has already been partially mined (see Map C -1) and all volumes represent the future mining. Area
<br />1 has over 1 million cubic yards of already excavated overburden and import material, which has
<br />Blue Pit May 2014 D -3
<br />Topsoil
<br />Gravel
<br />Total
<br />Backfill
<br />(@ 1'
<br />depth)
<br />2,187,825
<br />2,349,723
<br />623,165
<br />109,013
<br />6,692,201
<br />7,223,875
<br />1,914,618
<br />110,073
<br />202,240
<br />236,120
<br />47,941
<br />7,092
<br />. 134.68 818,990 105,881 145,490 581,962 9,082,266 9,809,718 2,585,724 226,178
<br />*Areal has been already been only partially mined. The disturbed area is 44.5 acres as of 2011. The topsoil and
<br />overburden to be excavated is only for the unmined area.
<br />The material volumes described in Table 2 are approximate but are based on the current operation
<br />and exploration drilling conducted in the area. The life of the mine is estimated at 30 years after
<br />2oo9 and is based on an average annual production of 450,000 tons per year. The estimated raw
<br />gravel production is 9,o82,266 cubic yards or 13,623,399 tons over 30 years. This has been the
<br />average over the past life of the mine but sales are always dependent on demand.
<br />The East Topsoil Stockpile currently has 105,881 cubic yards of topsoil in it. The estimated
<br />additional topsoil to be removed from Area 1 is 32,38o cubic yards, which is calculated at 1 foot
<br />depth over the undisturbed area, which is 20.07 acres. The estimated topsoil to be removed from
<br />Area 2 is 1o6,335 cubic yards, which was calculated at 1 foot depth of the entire surface area. The
<br />estimated topsoil to be removed from Area 3 is 6,776 cubic yards, which was calculated at 1 foot
<br />depth of the entire surface area. The total estimated topsoil to be removed is 145,490 cubic yards.
<br />The total overall topsoil (to be excavated and existing topsoil stockpile) is estimated to be 251,371
<br />cubic yards. The estimated topsoil needed to put back is calculated at 1 foot over the entire surface
<br />area and is 226,178 cubic yards. The difference is topsoil removed and topsoil to be placed is
<br />negligible and will be averaged out over the entire site.
<br />The topsoil volume was estimated using an average depth of 1 foot over the surface area. The
<br />overburden volume was estimated using an average depth of 4 feet over the surface area. Area 1
<br />has already been partially mined (see Map C -1) and all volumes represent the future mining. Area
<br />1 has over 1 million cubic yards of already excavated overburden and import material, which has
<br />Blue Pit May 2014 D -3
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