2009-03-06_REVISION - M1987049

• Permit No: M1987049
• IBM Index Class Name: REVISION
• Doc Date: 3/6/2009
• Doc Name: Amendment Submittal
• From: Brierley Associates LLC
• To: DRMS
• Type & Sequence: AM2
• Media Type: D
• Archive: No

maximum production rate of 1,500,000 tons per year, the following timetable is estimated
for the remaining eight (one existing, seven new) mining phases:

Phase Mineable
Acreage
(acres)
Estimated Production
(tons) [',-3
Duration 4
(months)

Remarks
11 12.4 638,170 5.1 Wet
12 10.5 487,803 3.9 Dry
13 11.2 266,919 2.1 Dry
14 6.9 174,718 1.4 Dry
15 16.4 879,602 7.0 Dry
16 16.8 1,102,236 8.8 Dry
17 6.7 391,631 3.1 Dry
18 16.6 1,056,341 8.5 Dry
Totals 97.5 4,997,420 39.9 -
NOTES:
1. Phase 11 production estimated based on assumed average thickness of sand and gravel of
approximately 22 ft.
2. Phase 12 through 18 production estimated based on drilling 34 geotechnical borings and
integration of these data into 3D CAD terrain model.
3. Production in tons assumes conversion factor of 1.45 tons/cubic yard.
4. Duration in months assumes a maximum production of 1,500,000 tons per year, hence minimum
duration)
5. Phase 18 comprises the existing plant area not included as a mining phase in the existing permit.
It is assumed that all mining operations, and final reclamation grading and
seeding, will be accomplished within a two to five year life span given current economic
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