Hello! Perhaps the following research articles (or the cited references therein) might be of some interest to you:

Mountaintop Removal Mining and Catchment Hydrology (MILLER and ZÉGRE, 2014)

http://www.mdpi.com/2073-4441/6/3/472/htm

Hydrologic Conditions and Water-Quality Conditions following Underground Coal Mining in the North Fork of the Right Fork of Miller Creek Drainage Basin, Carbon and Emery Counties, Utah, 2004 – 2005 (WILKOWSKE et al., 2007)

http://pubs.usgs.gov/sir/2007/5026/PDF/SIR2007_5026.pdf

Comparisons of Storm Response of Streams in Small, Unmined and Valley-filled Watersheds, 1999 – 2001, Ballard Fork, West Virginia (MESSER, 2003)

http://pubs.usgs.gov/wri/wri024303/pdf/wrir024303.pdf

Thank you, some of those are helpful.

If you know of any from the Powder River Basin area, or other regions of the world where there is coal strip mining in a neutral-alkaline water quality environment, please let me know.

Hello! Perhaps this recent Open File Report (OFR 640) from the Montana Bureau of Mines and Geology might be of interest to you:

Spring and Stream Water Quality - Powder River Basin, Montana

(WHEATON et al., 2013)

http://www.mbmg.mtech.edu/pdf-open-files/mbmg640.pdf

Thanks!

You are quite welcome. I am pleased to have been of some assistance!