2016-02-25_PERMIT FILE - C1982056A ‎(5)‎

• Permit No: C1982056A
• IBM Index Class Name: Permit File
• Doc Date: 2/25/2016
• Section_Exhibit Name: Exhibit 04E-11 Wolf Creek Reservcie AVF Monitoring Program
• Media Type: D
• Archive: Yes

Exhibit 4E-11— Wolf Creek AVF Monitoring Plan
Background and Purpose
Longwall mining of Panels WC-4RT through 9RT may result in subsidence and related effects to portions
of Fish Creek, Foidel Creek, and associated Alluvial Valley Floor (AVF) areas. A limited monitoring
program will be used, as further described in the following sections, to evaluate alluvial water quality and
levels, surface water quality and flow, and ponding.
Monitoring Program
Alluvium - TC has a network of established alluvial monitoring wells, which have been monitored for a
number of years, providing both baseline information and information on mining -related impacts for the
recent mining that occurred in the Wadge Coal Seam in the Eastern and Northern Mining Districts. Both
the extensive database of existing historical data, and data from ongoing monitoring will provide a sound
basis for evaluating any changes or impacts to the alluvial system resulting from mining and mining -
related subsidence for the Wolf Creek Reserve (WCR). The following established wells provide both
historic and ongoing alluvial water level and quality data for the Wolf Creek Reserve area:
➢ AVF13 (upstream on Fish Creek of the WCR mining area)
➢ AVF14 (Fish Creek in the center of the WCR mining area)
➢ AVF 15 (downstream on Fish Creek of the WCR mining area)
➢ 001-S5 (upstream on Foidel Creek of the WCR mining area)
➢ 008AVF1 (downstream on Foidel Creek of the WCR mining area)
➢ 008AVF2 (downstream on Foidel Creek of the WCR mining area)
These alluvial wells are and will continue to be monitored quarterly for water level and field parameters,
and semi-annually for full -suite parameters.
Surface Water — Established surface water stations have been monitored for a number of years, providing
both baseline information and information on mining -related impacts for the recent mining that occurred
in the Wadge Coal Seam in the Eastern and Northern Mining Districts. Both the extensive database of
existing historical data, and data from ongoing monitoring will provide a sound basis for evaluating any
changes or impacts to the surface water system resulting from mining and mining -related subsidence for
the Wolf Creek Reserve (WCR). The following established surface monitoring sites provide both historic
and ongoing alluvial water level and quality data for the Wolf Creek Reserve area:
➢
SWI -3 (upstream on Fish Creek of WCR mining area)
SW 14 (Fish Creek in the center of the WCR mining area)
➢ SW15 (downstream on Fish Creek of the WCR mining area)
➢ Site 305 (downstream on Fish Creek of the WCR mining area)
➢ Site 8 (upstream on Foidel Creek of the WCR mining area)
Site 900 (downstream on Foidel Creek of the WCR mining area)
➢ Site 900A (Foidel Creek near the northeastern limit of the WCR mining area — will be relocated to
the prior location of Station 304 and re -designated as Site 900A at least one year prior to mining -
related disturbance of Site 900)