Pierre River Mine Project

Section 2.3
ERRATA SUPPLEMENTAL INFORMATION ERRATA
Table ERCB 4-1: Internal Drain Flow Estimate
Approximate Length of
Perimeter Cell Dykes
(m)
Flux
(m 3 /s/m)
Total Expected Flow
(m 3 /d)
Thickened tailings 5,750 4.12E-05 20,500
Mature fine tailings 9,000 9.56E-05 74,500
Volume 1, Section 10, Mining and Processing SIRs
Errata Section 10.1, page 10-49, Table 136-2
Total Flow 95,000
The statement “The top of the ore surface was modified to exclude any ore
stringers of 3 m or greater that were separated from the main orebody by a waste
band more than four times as thick” was incorrect.
Correction The statement should have read “Both the top and bottom of ore surfaces were
used unaltered to calculate ore volumes.” This information is also provided in
the response to ERCB SIR 10a.
Volume 1, Section 10, Mining and Processing
Errata Section 10.1, page 10-127 and 10-128, Figures 197-1 and 197-2
The information provided in Figures 197-1 and 197-2 was incorrect.
Correction The corrected material balance for a typical operating calendar day case has been
reproduced here as Figure ERCB 25-1. The corrected material balance for a
typical operating stream day case has been reproduced here as Figure
ERCB 25-2.
Volume 1, Section 10, Mining and Processing SIRs
Errata Section 10.1, page 10-131, Table 199-1
The thermal requirement and natural gas consumed data presented in Table 199-1
was incorrect.
Correction The data should have been identical to that presented in Table 9-2 of the Pierre
River Mine Project Update. The correct information is shown here in Table
ERCB 27-1. This information is also provided in the response to ERCB SIR 27a.
2-10 Shell Canada Limited April 2010
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