Pulacayo Project Feasibility Study - Apogee Silver

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Pulacayo 1 000 t/d Phase I Feasibility Study - NI 43-101 Technical Report 090644-3-0000-20-IFI-100 a) Direct Labor The labor cost was calculated using the Bolivian regulations on social laws and benefits established for employees in civil and mining works. All of the labor costs are based in the following criteria: Cost based on a working day Payroll burdens and overtime shift premium rates Social laws Working week of 48 hours Tools and supplies Indirect costs of the contractor on site and at head office Contractor profits Labour productivity The labor rates assumed that all contractor craft personnel will be Bolivian. Temporary power and catering were excluded from the labour rates and changed to the project indirect costs. b) Materials and Rates for Construction The prices for materials and rates at unitary prices for the execution of diverse works in the project construction are determined using the available information in the TWP’s database and the rates used for contractors in the execution of the different works that TWP contracts at present time. c) Civil Works The list of materials drifts from the plans and schemes of project engineering. The estimations are based in the usually accepted practice in this type of study. Earth Movement Works The estimates of the amounts for earth movements include the effect of volume lost by the compaction of the material. In general, earthworks quantities were generated from site layouts (cut and fill, drilling and blasting, etc.). The estimation of the volume quantity of earth moving is subject to two parameters; the influence area and depth of the foundation structure. These parameters are calculated based on the structure weight and the ground bearing capacity. The measurement unit of the earth movement cost is based on the ratio USD/m 3 . These ratios are in agreement with the TWP database for similar projects. The earth movement costs and platform construction for the plant and plant infrastructure, as well as the internal access construction have been assumed by the client (Sunk Costs). TWP Sudamérica S.A. Av. Encalada 1257 Of. 801, Santiago de Surco Lima 33, Perú (51-1) 4377473 Page 261
Pulacayo 1 000 t/d Phase I Feasibility Study - NI 43-101 Technical Report 090644-3-0000-20-IFI-100 The corresponding budget for these works have been already disbursed by the Client and are therefore Sunk Costs for the present project and will not be considered in the calculation of the capital cost in the feasibility study. The earth movement cost and platform construction that has not been built has been estimated from drawings and quantities derived from the drawings. Concrete Works Concrete and formwork quantities were determined based on the mechanical arrangements – plan/elevation view drawings and sketches. No allowances for over-pour, wastage or rework were considered. The unitary concrete prices are all-in (concrete reinforcing steel and formwork). Additionally, the data of the Soil Mechanics Study (Geotecnia, Tarifa Fernandez S.R.L., Bolivia, Julio 2011) was taken into consideration to calculate the bearing capacity and depth of the concrete foundations. To size the foundations for vibrating equipment, a ratio in the range of 1 to 3 (for each ton of equipment, three tons of concrete is used) was used. For foundations for structures, the concrete dimensioning is subject to a weight ratio of the structure (kg) per foundation area (m 2 ) given that this relationship should not be below the soil bearing capacity. Reinforcing steel is obtained by ratios (kg/m 3 ) according to the volume of concrete and structural elements (footings, slabs, columns, walls, beams). The unit of measure of the cost of concrete is based on ratios in USD/m 3 . These ratios are in according to the TWP database of similar projects. The concrete price included supply of concrete from an on-site batch plant. For slabs, the quantity of concrete to be used depends on the application. For pedestrian traffic, concrete is 15 cm thick, for light traffic, concrete is 20 cm thick. If the slab is to be used for heavy machinery traffic, the concrete thickness is in the range of 25 cm to 30 cm. d) Structural Steel Works Structural steel quantities were developed from general arrangement drawings and experience from previous projects of similar nature. Unit rates (USD/kg) have been provided by regional contractors. The weights include allowances for connections, stiffeners, clips, base plates, etc. e) Equipment (Process and Mechanical) The equipment was classified and budgeted from the Equipment List. The providers quotations are a fundamental part in the selection of the equipment considered in this study (main and secondary equipment). As is necessary, most of the equipment and material will be imported due to a lack of availability in Bolivia. Where equipment is available in Bolivia, it will be procured locally. Imported equipment will be shipped by ocean, rail and trucks. Transport costs have been considered as indirect costs and have been estimated from quotations from logistics companies operating in South America. Equipment already purchased by Apogee was excluded (Maelgwyn flotation cells, Andritz press filters, and Pengfei comminution equipment). TWP Sudamérica S.A. Av. Encalada 1257 Of. 801, Santiago de Surco Lima 33, Perú (51-1) 4377473 Page 262
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Pulacayo Project Feasibility Study - Apogee Silver

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