PERMFILE120715

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: NH1 TAB 17 PROBABLE HYDROLOGIC CONSEQUENCES
• Media Type: D
• Archive: Yes

TAB 17
PROBABLE HYDROLOGIC CONSEQUENCES
Table of Contents (Cont.)
Page
Potential Impacts of Replaced Spoil on Ground Water Quality 17-57
Spoil Characterization 17-57
Effects on Ground Water Quality 17-57
Spoils Water Quality Data 17-59
Summary 17-61
Potential Impacts of Replaced Spoil on Surface Water Quality 17-61
Surface Water 17-68
Effects of Mining on the Local Geomorphology 17-68a
Effects of Sediment Ponds on Channel Characteristics and Downstream Users 17-76
Effects of Sediment Pond Discharges, Diversions and Culverts at Road
Crossings on Surface Water Quality 17-78
Effects of Runoff from Reclaimed Areas on the puanti ty of Streamf low 17-82
Effects of Runoff from Reclaimed Areas on the Quality of Streamflow 17-88
Summary 17-90
Literature Cited 17-95
List of Figures
Figure No. Page
17-1 Crid and Boundary Conditions Used to Model the
Effect of Pit Dewateri ng 17-11
17-2 Model Grid Overlay 17-12
17-3 Simulated Water Levels Prior to Pit Dewate ring 17-14
17-4 Drawdowns in the Overburden Aquifer, Year 1 17-15
17-5 Drawdowns in the Overburden Aquifer, Year 2 17-16
17-6 Drawdowns in the Overburden Aquifer, Year 3 17-17
17-7 Drawdowns in the Overburden Aquifer, Year 4 17-18
17-8 Drawdowns in the Overburden Aquifer, Year 5 17-19
_~ 17-9 Drawdown i
th
C
l A
if
Y 1 17-21
s n
e
oa
qu
er,
ear
17-10 Drawdowns in the Coal Aquifer, Year 2 17-22
17-11 Drawdowns in the Coal Aquifer, Year 3 17-23
ii Revised 10/07/88