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Blue Pit 112 Permit Amendment
<br />been placed in the eastern portion of the permit area. There is also an existing topsoil stockpile
<br />located on the easternmost portion of the permit, on top of the overburden material.
<br />Table 3: Backfill Volumes
<br />The existing overburden available for backfilling consists of the amount imported and backfilled in
<br />the east portion of Area 1 (818,9go cubic yards) and the amount available from future mining
<br />(581,962 cubic yards) which is a total of approximately 1.4 million cubic yards over the entire permit
<br />area). This is not sufficient to fully reclaim the site, but import material will account for the
<br />shortage. The total backfill volume required is 2.58 million cubic yards needed on site minus the
<br />1.4 million cubic yards which is available on site, which is 1.18 million cubic yards. The average total
<br />volume of import material has been approximately 55,000 cubic yards annually. Once mining in
<br />the expansion area commences, additional material can be accepted. Additional material was not
<br />able to be accepted due to space limitations. Also, the operator is currently charging to accept
<br />material. If more material is needed to reclaim the slopes, the fee can be waived. It is predicted
<br />that approximately 39,492 cubic yards would need to be imported annually to compensate for the
<br />backfill deficit of 1.18 million cubic yards. For this reason, it is essentially very reasonable to make
<br />the assumption that no import of backfill on site cost would be needed for the bond calculations,
<br />which are found in Exhibit L. The annual reports, which are not included in this application, will
<br />cite how much of import material is actually occurring on site each and every year.
<br />The plan is to continue moving west at the southern edge of the current mining limit, while
<br />performing most activities from the pit bottom, making most of the activities invisible. This
<br />includes the actual mining with a dozer, loading of the raw gravel with a front end loader and
<br />trucking the gravel to the plant facilities in Mining Area 1. At some point when the mining area has
<br />expanded further to the west, a conveyor will be installed to convey the raw mined gravel to the
<br />crusher /screening plant, as shown on map C -2A.
<br />As mining moves to Mining Area 2, the pit bottom will likely be lowered from an existing depth of
<br />approximately 77 feet to 90 feet to 120 feet. This is entirely based on what is believed to be the level
<br />Blue Pit May 2014 D -4
<br />Backfill
<br />Available On-
<br />Backfill Import
<br />Topsoil
<br />Topsoil
<br />Acres
<br />Needed On-
<br />Site Backfill
<br />Needed to On-
<br />Needed On-
<br />Available
<br />Site
<br />On -Site
<br />Site
<br />Site
<br />On -Site
<br />64.57
<br />623,165
<br />948,508
<br />(325,343)
<br />109,013
<br />138,261
<br />65.91
<br />1,914,618
<br />425,339
<br />1,489,279
<br />110,073
<br />106,335
<br />4.20
<br />47,941
<br />27,104
<br />20,837
<br />7,092
<br />6,776
<br />134.68
<br />2,585,724
<br />1,400,952
<br />1,184,772
<br />226,178
<br />251,372
<br />The existing overburden available for backfilling consists of the amount imported and backfilled in
<br />the east portion of Area 1 (818,9go cubic yards) and the amount available from future mining
<br />(581,962 cubic yards) which is a total of approximately 1.4 million cubic yards over the entire permit
<br />area). This is not sufficient to fully reclaim the site, but import material will account for the
<br />shortage. The total backfill volume required is 2.58 million cubic yards needed on site minus the
<br />1.4 million cubic yards which is available on site, which is 1.18 million cubic yards. The average total
<br />volume of import material has been approximately 55,000 cubic yards annually. Once mining in
<br />the expansion area commences, additional material can be accepted. Additional material was not
<br />able to be accepted due to space limitations. Also, the operator is currently charging to accept
<br />material. If more material is needed to reclaim the slopes, the fee can be waived. It is predicted
<br />that approximately 39,492 cubic yards would need to be imported annually to compensate for the
<br />backfill deficit of 1.18 million cubic yards. For this reason, it is essentially very reasonable to make
<br />the assumption that no import of backfill on site cost would be needed for the bond calculations,
<br />which are found in Exhibit L. The annual reports, which are not included in this application, will
<br />cite how much of import material is actually occurring on site each and every year.
<br />The plan is to continue moving west at the southern edge of the current mining limit, while
<br />performing most activities from the pit bottom, making most of the activities invisible. This
<br />includes the actual mining with a dozer, loading of the raw gravel with a front end loader and
<br />trucking the gravel to the plant facilities in Mining Area 1. At some point when the mining area has
<br />expanded further to the west, a conveyor will be installed to convey the raw mined gravel to the
<br />crusher /screening plant, as shown on map C -2A.
<br />As mining moves to Mining Area 2, the pit bottom will likely be lowered from an existing depth of
<br />approximately 77 feet to 90 feet to 120 feet. This is entirely based on what is believed to be the level
<br />Blue Pit May 2014 D -4
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