DMA prepared the Feasibility Report and Environmental Assessment for an acid mine drainage abatement / aquatic ecosystem restoration project in Lackawanna County. PA. The Fall Brook Run watershed is located in the anthracite coal region of northeast Pennsylvania. Resulting from years of deep mining and relocation of the stream system associated with surface mining, Fall Brook Run and its tributary Murin Run have significant base flow losses. During low summertime flow conditions, reaches of both streams are dry. Historic underground mining and subsequent mine subsidence has enhanced bedrock fracture patterns of the streambed contributing to the observed loss of base flow. The recommended plan developed by DMA consisted of sealing the streambed, aquatic and riparian corridor reclamation, and reclamation of a 285 acre abandoned strip mine site. Activities performed by DMA include: water quality analysis, stream flow analysis, ecological baseline analysis, hydrologic and hydraulic investigations, geotechnical studies, plan formulation, native species planting plan development, natural channel enhancement design, preliminary and final design analysis, MCACES cost estimating, habitat analysis and quantification of ecological outputs, cost effectiveness and incremental cost analysis, economic and social impact studies, feasibility report preparation, NEPA documentation, and agency coordination and public involvement.