2018-09-17_PERMIT FILE - C1981025A

• Permit No: C1981025A
• IBM Index Class Name: Permit File
• Doc Date: 9/17/2018
• Section_Exhibit Name: 4.0 Operation and Reclamation Status
• Media Type: D
• Archive: Yes

• Prior to the construction of the two treatment ponds in 1988,
topsoil was salvaged and stockpiled south of sediment pond P-9.
About 500 cubic yards of topsoil was placed in this stockpile.
This stockpile was vegetated to minimize erosion during the fall of
1988.
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Prior to the construction of the long pond about 250 cubic yards of
topsoil was salvaged. This topsoil was stockpiled in an area north
and west of the long pond. The location of the topsoil stockpiles
is shown on drawing D-2-5.
In order to minimize erosion the topsoil stockpiles will be
vegetated with the seed mixture no. 4 shown on page 4-62 of the
permit. The seeding was completed in the fall of 1989,
During 1992 the embankment of the long pond was revised so it
complies with Rule 4.05.6 except rule 4.05.6(11)(h). The minimum
top width of the embankment is 4 -feet. This width is considered
adequate because the embankment only contains about 3 -feet of
water. Drawing D-2-5 has been revised to show the new
configuration of the long pond embankment. Calculation sheets
contained in Appendix 4-B, Volume III present the calculations used
to determine necessary spillway sizes and the size of the diversion
ditch above ponds T-1 and T-2.
The No. 3 Mine, (Outfall 007), has two separate sources of
discharge. One is from a point source (spring) within the Mine
that is piped directly to the surface. This good quality point
source of water has been the source of the discharge from the No.
3 Mine, (Outfall 007), since the mine was sealed in 1986. The
water level in the mine has fluctuated since that time but no water
has discharged directly from the mine in ten (10) years. During
the second quarter, the very wet spring weather evidently caused
the mine to fill and begin discharging iron laden water.
The discharge was first discovered on Monday, June 26, 1995 at
about 9:45 a.m. Approximately 67.5 gpm was flowing from the mine.
The discharge was inspected on Wednesday and Friday of the same
week and the flow was decreasing quite rapidly.
In order to handle the non-compliance discharge, Minrec combined
the discharge from the No. 3 Mine, (Outfall 007), with the
discharge from the No. 1 Mine, (Outfall 001), as provided for in
its discharge permit. A 4" diameter pipe has been installed to
convey the discharge from Outfall 007 to the long pond. The
discharges from the mines were combined effective August 11, 1995.
All of the discharge water from the No. 3 Mine was combined with
the Discharge from the No. 1 Mine.
The spillway systems for the ponds were revised in order to provide
for the increased flow through the treatment pond system.
4-66i Rev. 04-13-96