Pulacayo Project Feasibility Study - Apogee Silver

Pulacayo 1 000 t/d Phase I Feasibility Study - NI 43-101 Technical Report
090644-3-0000-20-IFI-100
Item Description Detail
6 Structural Steel
7
Tanks and Platework (Chutes
and Pump Boxes)
8 Piping/Valves
9 Electrical
10
Material/Quantity Take-offs
(MTO’s)
11 Instrumentation
by contractors, assuming that the concrete will be produced in
a batch plant fed with aggregated obtained nearby the project
site
The weight of structural steel (metallic structures) is obtained
from design models (SAP 2000) and the bolts and connections
are estimated according to weight ratios. Handrails and grating
panels are measured from the plant layout and the grout is
calculated according to the section of the column
Quantities for platework and metal liners for tanks, pump boxes
and chutes have been calculated from sketches and provided
in kilograms of steel. Unitary prices used were obtained from
provider and from the TWP’s database, as appropriate
Piping and fittings quantities are based in quantity take-off with
prices (USD/m) budgetary quotes. The quantity take-offs are
developed from pipe routing drawings based on the general
arrangement drawings and the P&ID’s which identifies pipe
size. The list of materials (MTO’s) have been developed for the
main pipes only (as shown in the piping route GA). These
pipes have been costed based on this information and the
available quotes for materials/accessories. The rest of the
pipes for each processing area will be costed based on a
percentage of the total pipes capital costs
Power cables costs have been estimated by using rates
(USD/m). Electrical costs have been developed from the
related study deliverables of others disciplines and are based
on the single line diagram (substations, switchgear,
switchboards, power transformers and motor control centers),
drawings and sketches. The mechanical equipment list was
used to estimate plant loading and site power requirements.
The equipment list in conjunction with the site plan was used to
determine electrical building locations by centralizing electrical
infrastructure to minimize cable runs. Major electrical rooms
are located within the large process buildings and
infrastructure. Electrical equipment and cable (caliber length)
prices are supplied by providers. TWP’s database has been
used as appropriate. Field instrumentation costs are derived
from in-house pricing data base and recent pricing obtained
from recent similar projects
Material take-offs were prepared for all facilities. In addition to
the equipment list and other engineering discipline
deliverables, the engineering disciplines are also responsible
to generate bulk materials take-offs for estimating. A material
take-off is the process of analyzing drawings and determining
all the materials required to complete the design (list of
materials, quantities, types, grades of materials and the
weights of such materials)
It is based on the list of Instruments and Control Equipment,
quotations from suppliers and/or ratios that are accordance
with the TWP database of similar projects. Fields
instrumentation costs are derived from in-house pricing
database and recent pricing obtained from recent similar
project
TWP Sudamérica S.A. Av. Encalada 1257 Of. 801, Santiago de Surco Lima 33, Perú (51-1) 4377473
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