2015-03-31_REPORT - C1994082

• Permit No: C1994082
• IBM Index Class Name: Report
• Doc Date: 3/31/2015
• From: DRMS
• To: Seneca Coal Company, LLC
• Annual Report Year: 2014
• Permit Index Doc Type: Annual Reclamation Report
• Email Name: JHB
• Email Name: MPB
• Media Type: D
• Archive: No

SEDIMENTATION POND SURVEYS
SCC is required by Permit C -82 -057 to monitor sedimentation ponds for sediment storage
capacities. In accordance with Rule 4.05.6(11)(c), SCC visually inspects each pond a
minimum of quarterly each year. During these inspections, any drastic change in
sedimentation storage or sudden increase in a sediment delta at the inlet to the pond could be
detected which would require mitigation.
Based on the 2014 survey, all sediment ponds have sufficient sediment storage. Additionally,
all ponds have been discharging in compliance with the approved NPDES permit effluent
limitations. Yearly sediment delivery estimates to the ponds are considerably less than
originally calculated, since significant portions of these watersheds have now been
revegetated. The results of the annual survey are shown on Table 13.3, Sediment Pond
Capacities.
TABLE 13.3 SENECA SEDIMENT
PONDS -WATER
CAPACITY TRENDS
P-:
MMAMEFC--t
YEAR
2008
2009
Remaining W
2010 2011
2012
2013 2014
FDecision
Y - 016
3.68
7.6
-.6
-.8
8
8
- . -
9.2
TTt -3
Y - 611
6.99
3.6
3.6
3.6
3.6
3.6
3.-
3.6
TR -37
Y - 0112k
0.633
NA
NA
-NA
NA
N A
NA
TtiA
TR -37
Y-012
0. -6-
0.7
0.-
1.1
6.83
1.2
1.3
13
T 3-
Y -012A
63
63
6.1
3.6
5
4.6
4.4
* - 013
1.325
45
4.4
4.5
4.4
43
4.5
4.5
TR -37
Y -614
1.6
10.5
7.5
7.6
--
75
7.5
TR -37
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STOCK TANKS & SURGE CONTROL STRUCTURES
No stock tanks or surge control structures were constructed in 2014.
8