U.S. Army Corps of Engineers, Huntington District
Kirkwood Township, Ohio
Burgess & Niple (B&N) completed the Section 1135 Project Modification Report (PMR) to evaluate acid mine drainage (AMD) impacts from the Lick Run Watershed, located in the Egypt Valley Wildlife Area, to an embayment on Piedmont Lake. Groundwater sampling reported high levels of aluminum (Al), iron (Fe), manganese (Mn) and sulfate (SO4), indicating contact with an unidentified source of pyrite or other sulfidic material, buried during reclamation of the surrounding strip mine.
Seven treatment systems were potentially available to improve the chemical and physical condition of the embayment by removing dissolved aluminum from Lick Run waters. A Cost Effectiveness and Incremental Cost Analysis of the ecosystem restoration plans for AMD abatement was completed. This analysis involved an incremental comparison of the costs and ecological outputs of a variety of management measures and treatments for improving fisheries habitat. The analysis was performed using “Nine Easy Steps” approach and the WES/IWR Cost Effectiveness Analysis model.
Of the seven alternatives, only a passive treatment system was considered cost effective. Of the possible passive treatment systems, oxic limestone channels, dosing limestone, and aerobic wetlands were considered the most cost effective. Following completion of the evaluation and selection of the preferred AMD abatement system, B&N completed the detailed design of the selected passive treatment system. Major components of the work included: