2019-06-19_REVISION - M1980244 ‎(2)‎

• Permit No: M1980244
• IBM Index Class Name: REVISION
• Doc Date: 6/19/2019
• Doc Name: Adequacy Review Response
• From: CC&V
• To: DRMS
• Type & Sequence: TR113
• Email Name: TC1
• Media Type: D
• Archive: No

NEWMONT
GOLDCORP
photographs (ground-based, aerial or satellite) should include the date of
the image.]
With the exception of Figure 1 (which does not include the date of the aerial
image), none of the figures in the TR-113 submittal conform to the standard in
Rule 6.2.1(2). Please resubmit Figures 2 through 4 to conform to Rule 6.2.1(2).
In lieu of resubmitting Figure 1 with the date of the aerial image, please provide
the date of the image in your response to this adequacy letter.
Figure 1 has been updated to include the July of 2017 aerial image date;
included in this response. Figures 2 through 4, updated to conform to the
standard in Rule 6.2.1(2), have also been included in this response.
2) Liner: The narrative on page 1 does not provide any specifics on the liner. Please
describe the material being used for the liner. This information will be critical to
the analyses required in Comment 5 below.
The liner used to construct the study cell is 80 millimeter double-sided
textured linear low density polyethylene (LLDPE) geomembrane.
3) Stacking: The "stacking" discussion on page 1 of the TR request states
"Approximately 18,000 tons of ore will be placed on top of the crushed ore"
discussed in the `liner"portion of the TR request. The "stacking"narrative further
explains a combined 36,000 tons of test pad materials will be the total amount of
material placed on the leach cell liner and be stacked a maximum of 35 feet in
height above the cell liner. The "liner' narrative indicates the 3-foot depth of
previously processed, crushed ore is also 18,000 tons. Despite the variable
thickness (between 2 and 32 feet, averaging roughly 17 feet), this suggests the
ore to be placed on the 3 feet of crushed ore has the same weight despite being
about 5 times the thickness. Please explain why the ore has roughly 20 percent
of the density of the previously crushed, processed ore.
Upon review of the ore tonnage; the approximate weight of crushed ore on the
cell is estimated to be approximately 16,000 tons at an average stacking height
of less than four feet. The ore proposed to be placed on top of the
aforementioned crushed ore is estimated to weigh approximately 40,000 tons
at an average height of 11 feet. This is based on the average height of each
portion of ore (combined total average height of 15 feet), cell area (as
confirmed in the response to comment number 8, below) and unit weight of
the material (as noted in the response to comment number 5, below).