The Bul River deposit has been described as a Churchill-type vein copper-silver deposit (Lefebure, 1996). The deposit type displays characteristics of relatively low tonnage (typically range from 10Kt to 1Mt) but high grade (typically range from 1% to 4% Cu). Frequently occurring in Proterozoic-age extensional sedimentary basins, Churchill-type deposits are associated with rifting can comprise single vein to complicated vein systems that vary from centimetres to tens of metres in width, and can extend hundreds of metres along strike and down dip. Commonly hosted in clastic meta-sediments, veins and vein systems are often spatially associated with mafic dykes and sills. The veins are generally associated with major faults related to crustal extension that controls the ascent of hydrothermal fluids to favorable sites for metal deposition. Fluids are believed to be derived from those mafic intrusives that are associated with the vein systems. (Snowden 2013).

Mineralization in Churchill-type deposits is predominantly chalcopyrite, pyrite, and chalcocite with subordinate pyrrhotite, galena, bornite, tetrahedrite, argentite, and covellite and is generally younger than the host lithology.

The GBRM deposit is hosted within poorly exposed graded turbidite beds of the middle Aldridge Formation of the Middle Proterozoic Purcell Supergroup. Interbedded quartzites, siltstones, and argillites make up a turbidite sequence whose bedding plane strikes approximately east ........

A main access ramps and seven levels of development, including vent raises and an escape route, are in place and in operational condition. There are also numerous mill feed access cross-cuts and sill drifts in areas where future mining is planned. The main access ramp is 2555 meters long and there is an additional 14,050 meters of level development.

The base case production plan is based on a mill feed rate of 700tonnes per day (tpd). The mine design can support this production using a longitudinal long-hole open stoping mining method and multiple production headings. Remote scoop-trams will be used for mucking the mill feed from the extraction drifts of each level to a re-muck bay where the mill feed will then be loaded into trucks for haulage up the main access ramp to surface.

Fans will provide ventilation by forcing air down the escape way, through the internal raises to the operating areas, and exhausting via the access ramp to surface. The ventilation raises will double as secondary means of egress.

The mine will operate for a total of six and a half years; an existing stockpile of mill feed will feed the process plant for the first ten months, followed by production from the restart of underground mining operations.

Geotechnical and rock mechanic studies are required for any higher level studies on the property. The potential use of cemented tailings for backfill will also require technical studies.

Cut and fill m ........

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