NI43-101Pre-Feasibility Study Report - page 524

Rare Element Resources
Bear Lodge Project
Canadian NI 43-101 Technical Report
October 9
, 2014
100135-200-46 – Rev. 0
The building foundation will be built on piles supporting grade beams (foundation
walls) with a structural concrete slab on the ground;
The indoor tanks and reactors are supported by a structural slab supported by a
series of concrete columns on pile caps and piles;
The average pile length is 25 ft. (7.6 m);
The structural system consists of a steel structure (steel deck on open web steel
joists, beams and steel columns);
The structural columns grid is 25 ft. x 25 ft. (7.6 m x 7.6 m) in office areas and 40
ft. x 50 ft. (12.2 m x 15.2 m) elsewhere;
No provision other than three sump pits is included for channel gutters or
depressions in the floor concrete slab;
A mezzanine is installed over the tanks. The mezzanine consists of fiber reinforced
polymer grating installed on a coated structural steel structure;
The exterior tanks are supported on a structural slab on piles;
All concrete is protected from chemical attacks with an epoxy phenolic tank lining.
The leach reactors are shop fabricated;
The precipitation reactors are shop pre-fabricated and assembled on site.
C) Mining
Contractor performed pre-stripping of 6.9MMt of waste in the year before
Purchase of mining, mobile, and support equipment;
Construction of truck shop/warehouse/office building;
Construction of haulage roads, sediment control and site preparation;
Indirect costs associated with the pre-stripping period;
The capital costs for the mining area includes the initial capital costs incurred in
the year before mining production and the sustaining capital costs incurred during
the project.
D) Common Assumptions
The excavation cost includes the transport and disposal of cuttings for up to three
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