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Tailing Storage Volume
<br />Phase 1
<br />Phase 2
<br />Phase 3
<br />Total
<br />Total volume (yd
<br />43,000
<br />29,010
<br />72,010
<br />144,020
<br />Freeboard volume (yd
<br />6,790
<br />4,110
<br />4,110
<br />4,110
<br />Net volume (yd
<br />36,210
<br />24,900
<br />67,900
<br />139,910
<br />Net volume (ft
<br />977,670
<br />672,300
<br />1,833,300
<br />3,777,570
<br />Net weight (st)
<br />54,315
<br />37,350
<br />101,850
<br />209,865
<br />Production rate (st/y)
<br />56,000
<br />56,000
<br />56,000
<br />56,000
<br />Cons (11% MP st)
<br />6,160
<br />6,160
<br />6,160
<br />6,160
<br />Cons shipped (wet st)
<br />6,844
<br />6,844
<br />6,844
<br />6,844
<br />Tails (89% MP st)
<br />49,840
<br />49,840
<br />49,840
<br />49,840
<br />Solids ( %)
<br />65%
<br />65%
<br />65%
<br />65%
<br />Water ( %)
<br />35%
<br />35%
<br />35%
<br />35%
<br />Water reclaim ( %)
<br />90%
<br />90%
<br />90%
<br />90%
<br />Net Tails slurry (st)
<br />52,524
<br />52,524
<br />52,524
<br />52,524
<br />Capacity (yr)
<br />1.03
<br />0.71
<br />1.94
<br />4.00
<br />The TSF facility, as a 110(2) permit, is scheduled for 2 phases of development within the
<br />existing 4.6 acre TSF area. The TSF 4.6 acre area is shown on Exhibit TSF -01 and the TSF is
<br />located within the black line polygon area south of the mill. The Phase 1 TSF is shown on
<br />Exhibit TSF -02 and the Phase 1 facility cross - section is shown on Exhibit TSF -04. The Phase 2
<br />TSF is shown on Exhibit TSF -03 and the Phase 2 facility cross - sections are shown on Exhibit
<br />TSF -04.
<br />The facility is a cut and fill structure, with Phase 1 requiring about 4,500 yd of fill from the
<br />existing TSF OB stockpile east of the existing pond. The 4,500 yd is the excess cut material
<br />stockpiled from the original TSF construction. This material is incorporated into the cut and fill balance
<br />for the new TSF construction. Table C -13 presents the cut and fill balance for the Phase 1 and
<br />Phase 2 structures. The networking capacity of Phase 1 is 54,000 st and Phase 2 is 37,000 st.
<br />The total pond capacity of Phase 1 is 22.4 ac -ft and Phase 2 is 15.4 ac -ft. Phase 3 is 4 each 5 ft
<br />lifts on the combined Phase 1 & 2 ponds, merging the ponds into one pond. Final total net
<br />working TSF capacity within the 4.6 acres is estimated at 210,000 st tails at 90% solids.
<br />Additional expansion requires increasing the disturbance area beyond the 10 acre 110 permit
<br />maximum disturbance and the conversion from a 110(2) permit to a 112 permit.
<br />Table C -13: TSF Impoundment Volumes
<br />Table C- 14:TSF Capacities
<br />TSF Construction Preparation
<br />Construction of the Phase 1 TSF impoundment requires the removal and replacement of
<br />approximately 1,000st of historic tailings and approximately 100 tons of magnetite, both
<br />currently contained within the unlined facility. The TSF OB stockpile to the east of the existing
<br />impoundment will also be removed, incorporated into the fill construction of the lower access
<br />road to the concentrate storage, fill for the Phase 1 impoundment and suitable clay underliner
<br />material used for the Phase 1 pond bottom.
<br />M1990 -057 September 27, 2011
<br />Stage 1
<br />Stage 2
<br />Cut (yd
<br />18,000
<br />14,000
<br />Fill (yd
<br />23,000
<br />4,000
<br />Net Excess (yd
<br />-5,000
<br />10,000
<br />The TSF facility, as a 110(2) permit, is scheduled for 2 phases of development within the
<br />existing 4.6 acre TSF area. The TSF 4.6 acre area is shown on Exhibit TSF -01 and the TSF is
<br />located within the black line polygon area south of the mill. The Phase 1 TSF is shown on
<br />Exhibit TSF -02 and the Phase 1 facility cross - section is shown on Exhibit TSF -04. The Phase 2
<br />TSF is shown on Exhibit TSF -03 and the Phase 2 facility cross - sections are shown on Exhibit
<br />TSF -04.
<br />The facility is a cut and fill structure, with Phase 1 requiring about 4,500 yd of fill from the
<br />existing TSF OB stockpile east of the existing pond. The 4,500 yd is the excess cut material
<br />stockpiled from the original TSF construction. This material is incorporated into the cut and fill balance
<br />for the new TSF construction. Table C -13 presents the cut and fill balance for the Phase 1 and
<br />Phase 2 structures. The networking capacity of Phase 1 is 54,000 st and Phase 2 is 37,000 st.
<br />The total pond capacity of Phase 1 is 22.4 ac -ft and Phase 2 is 15.4 ac -ft. Phase 3 is 4 each 5 ft
<br />lifts on the combined Phase 1 & 2 ponds, merging the ponds into one pond. Final total net
<br />working TSF capacity within the 4.6 acres is estimated at 210,000 st tails at 90% solids.
<br />Additional expansion requires increasing the disturbance area beyond the 10 acre 110 permit
<br />maximum disturbance and the conversion from a 110(2) permit to a 112 permit.
<br />Table C -13: TSF Impoundment Volumes
<br />Table C- 14:TSF Capacities
<br />TSF Construction Preparation
<br />Construction of the Phase 1 TSF impoundment requires the removal and replacement of
<br />approximately 1,000st of historic tailings and approximately 100 tons of magnetite, both
<br />currently contained within the unlined facility. The TSF OB stockpile to the east of the existing
<br />impoundment will also be removed, incorporated into the fill construction of the lower access
<br />road to the concentrate storage, fill for the Phase 1 impoundment and suitable clay underliner
<br />material used for the Phase 1 pond bottom.
<br />M1990 -057 September 27, 2011
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