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Waste Rock Facility in the southwest corner. The total footprint for the Waste Rock Facility,
including the Low Grade Ore Stockpile will be approximately 426 acres.
The design includes 2.5 horizontal to vertical lift faces that will be reclaimable. These faces will
be developed from an angle of repose approximately 1.4 horizontal to vertical faces by dozing
after active placement on a face is completed.
The overall design components of the Waste Rock Facility include foundation preparation, an
underdrain collection system, and water management structures. Foundation preparation
involves cutting and removing trees and underbrush, removal of topsoil for reclamation and
removal of any unsuitable material from selected zones for slope stability purposes. The
underdrain collection system will be installed within the footprint of the Waste Rock Facility to
intercept water from naturally occurring seeps and springs and seepage from the facility.
Perimeter slope runoff collection ditches will be constructed around the Waste Rock Facility to
reduce impacts to Beaver Creek drainages. These would discharge through sediment control
basins at low points along the ditch alignment. Benching of the faces and side slope drainage
channels will reduce erosion from the Waste Rock Facility.
RER has conducted and is continuing a geochemical characterization and geotechnical
investigation of the waste rock to support Waste Rock Facility engineering design and
permitting.
5.4.2 Waste Created On-Site
Waste created on-site may include: solids from sewage treatment facility maintenance, truck
wash wastes, laboratory wastes, and spill cleanup residues – if spills occur.
The preferred option for sewage treatment would be the on-site construction of a portable
wastewater treatment facility within the footprint of the PUG Plant sized to meet daily domestic
needs. This system would include a designed inlet screen, equalization and aeration tank, and
membrane filtration with final ultraviolet disinfection. The final effluent will meet WDEQ effluent
standards for recycle including dust suppression within the mine area. Periodic removal of solids
from the facility may be required and would be performed by a commercial company. An
example of the portable wastewater treatment facility is provided in Appendix M.
In addition to the portable sewage treatment facility, portable toilets may be used around the
mine area as needed. These portable toilets will be maintained and serviced by commercial
providers. Laboratory waste will be stored in containers for off-site disposal.
Waste water from truck washing will be collected in sumps at the truck wash facility. The sump
materials will be allowed to settle; oil will be removed by skimming and recycled or reused; the
water will be reused in the truck wash or applied to road surfaces for dust control; and the
sediments will be removed, tested for hazardous characteristics, and if determined to be non-
hazardous, disposed in the Waste Rock Facility. If the sediments are determined to be
hazardous, they will be placed in proper containers and handled in accordance with state
(WDEQ-Solid and Hazardous Waste Division Rules and Regulations) and federal hazardous
waste requirements.
Waste laboratory chemicals will be containerized and stored within the PUG laboratory for
offsite disposal, if required. The generation of these wastes should be minimal and below
quantities requiring hazardous waste regulation. There will be no effluent discharge from the
laboratory facility to the environment.
In the unlikely event that spills of materials occur, cleanup will be conducted in accordance with
plans established in the ERRCP (see Appendix I). The solid wastes from spill cleanup will likely
be soils, rags, clothing, and absorbent materials. Liquids from spills will be contained and
