1. American Public Health Association (1999) Standard Methods for the examination of water and wastewater. In: Clesceri LS, Greenberg AE, Eaton AD (eds), (20th Edit), American Public Health Assoc, American Water Works Assoc, and the Water Environment Federation, Washington DC, USA
2. Boyer Kantz and Associates (1976) Operation Scarlift, Babb Creek Mine Drainage Abatement Project. Abandoned Mine Reclamation Clearinghouse. https://amrclearinghouse.org/Sub/SCARLIFTReports/ Accessed 22 June 2019
3. Burrows JE, Peters SC, Cravotta CA (2015) Temporal geochemical variations in above- and below-drainage coal mine discharge. Appl Geochem 62:84–95
4. Coal Authority (2012) Mine water treatment schemes, code of practice. https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/356529/pos-tca-mine-water-treatment-schemes_codeofpractice_2012.pdf. Accessed 18 June 2019
5. Demchak J, Skousen J, McDonald LM (2004) Longevity of acid discharges from underground mines located above the regional water table. J Environ Qual 33:356–668