2013-02-21_REPORT - C2009087

• Permit No: C2009087
• IBM Index Class Name: REPORT
• Doc Date: 2/21/2013
• Doc Name: 2012 Annual Hydrology Report ‎(Emailed)‎
• From: Peabody Sage Creek Mining, LLC
• To: DRMS
• Annual Report Year: 2012
• Permit Index Doc Type: Hydrology Report
• Email Name: JDM
• Email Name: DIH
• Media Type: D
• Archive: No

Introduction
The information assembled in this 2012 Annual Hydrology Report (AHR)
includes data collected from approved monitoring sites established at
the Peabody
Locations of
referring to
Sage Creek Mine
(PSCM), State Permit No.
1
C- 2009 -087.
monitoring sites associated with the PSCM can be found by
Map 2.04.7 -M1, Hydrology, which may be found in Volume 4A
the PSCM Permit Application Package (PAP). Locations of monitoring sites
associated with the Seneca II Mine can be found by referring to Exhibit
7 -2, Hydrology Monitoring Site Location Map, which may be found in the
Seneca II Permit Application Package (PAP). In addition, NPDES ponds,
surface water sites, monitor wells and spoil springs are located in
Figure 1, Appendix A. A general site map of PSCM and Seneca Coal Company
monitoring sites may be found in Figure 2. All references to 2012, or to
"this year ", will be for Water Year 2012 (October 1, 2011 through
September 30, 2012) unless otherwise noted. All tables referred to in
the following text can be found in Appendix A. In addition, a table of
contents for Appendix A is given at the beginning of that appendix.
This is the third AHR for the PSCM. The mining permit for the PSCM was
approved by the CDRMS in May 2010. Excavation of the portal area began
in June 2011. A large portion of the reclaimed Seneca II Mine (State
Permit No. C -80 -005) exists in the PSCM permit area. The last of the
coal at the Seneca II Mine was removed in August 1999. Many of the
hydrology monitoring sites used by the Seneca II Mine continue to be
used for the PSCM. Therefore, when discussing historic data, the Seneca
II Mine (or, Seneca) name will be used. PSCM will be used when
discussing current data. Sites that are specific to the new (Permit
Revision 2, approved December 2010) Seneca II Mine program will be
discussed in that AHR. Those include all sites in the NPDES Pond 008
basin, as well as the sites on Fish Creek.
Field conductivity and pH meters are calibrated prior to each day's use.
The conductivity meter is calibrated using a potassium chloride solution
with an electrical conductivity in the 1000 to 4000 umhos /cm range. The
pH meter is calibrated using NBS traceable buffers with pH values of 7