2016-11-23_PERMIT FILE - C1981008A

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 11/23/2016
• Doc Name: Mine Facilities
• Section_Exhibit Name: Section 2.05.3‎(3)‎ Table of Contents & Mine Facilities
• Media Type: D
• Archive: Yes

F. Sedimentation Ponds 008 throush 018 Design Parameters
In accordance with Rule 4.05.2, Ponds 007 through 018 will be used to prevent, additional
contributions of sediment to stream flow or runoff outside the permit area due to mining
disturbance. Pond 011 has been fully reclaimed and some of the drainage area that was
previously to be handled by these ponds is now handled by Pond 013. The pond designs and or
run-off calculations for the sedimentation ponds are shown below:
Pond
Attachment
Maps
Pond 007
Attachment 2.05.3(3)-2
Map 2.05.3(3)-2-1 and Map 2.05.3(3)-2-2
Pond 008
Attachment 2.05.3(3)-4
Map 2.05.3(3)-4-1 and Map 2.05.3(3)-4-2
Pond 009
Attachment 2.05.3(3)-5
Map 2.05.3(3)-5-1
Attachment 2.05.3(3)-30
Attachment 2.05.3(3)-30, Map 1
Pond 011
Attachment 2.05.3(3)-20
Map 2.05.3(3)-14
Pond 012
Attachment 2.05.3(3)-12
Map 2.05.3(3)-12-1
Attachment 2.05.3(3)-13
Map 2.05.3(3)-12-2
Attachment 2.05.3(3)-31
Map 2.05.3(3)-12-3
Map 2.05.3(3)-12-4
Attachment 2.05.3(3)-31, Map I
Pond 013
Attachment 2.05.3(3)-6
Map 2.05.3(3)-6-1
Attachment 2.05.3(3)-21
Attachment 2.05.3(3)-32, Map 1
Attachment 2.05.3(3)-32
Pond 014
Attachment 2.05.3(3)-11
Map 2.05.3(3)-11
Pond 015
Attachment 2.05.3(3)-22
Map 2.05.3(3)-15
Attachment 2.05.3(3)-24
Map 2.05.3(3)-19
Attachment 2.05.3(3)-33
Attachment 2.05.3(3)-33, Map 1
Pond 016
Attachment 2.05.3(3)-29
Attachment 2.05.3(3)-29, Map 1
Attachment 2.05.3(3)-29, Map 2
Pond 018
Attachment 2.05.3(3)-28
Attachment 2.05.3(3)-28, Map 1
Attachment 2.05.3(3)-28, Map 2
Attachment 2.05.3(3)-28, Map 3
Ponds 007 and 008 are the only ponds that will remain after reclamation. Pond 013 will remain
for some time after the reclamation of the surrounding land but will not be permanent. The
demonstration to allow retention of Pond 007 is Attachment 2.05.3(3)-16. The demonstration to
allow retention of Pond 008 is Attachment 2.05.3(3)-19. Map 2.05.3(3)-1 shows the locations of
the as -built and yet -to -be built ponds. Pond 014 was the post -mine conversion of the pre -mine
SAE #2. It was reclaimed along with the BB detour road and no longer exists as of April 2010.
The sedimentation ponds are designed, constructed, and maintained as follows:
a. Ponds 008, 009, 012, and 013 have been designed to contain the 25 year 24 hour
event with no discharge from the emergency spillway. Ponds 015, 016 and 018
have been designed for a 100 -year 24-hour event with no discharge. Due to their
small drainage area and completely incised impoundment, there are no
embankments to fail, so only run-off volume calculations have been performed.
Page 2.05.3(3)-12 January 2016 (TR -70)