Original sentence: All this was not without cost - the lake covers the former farm community of Milford Mills.Construction of the dam on Marsh Creek and formation of Marsh Creek Lake at Marsh Creek State Park solved several problems.Finally, the lake provides outdoor recreational opportunities.First, the lake provides drinking water for the Chester County Water Resources Authority, alleviating a previous shortage.From 1970-1973 the state constructed the dam, then took three years to fill the lake behind it.People had to be relocated from Milford Mills, which was to be flooded by the new lake.Second, the dam limits potential damage caused by seasonal flooding in the area
Edited sentence: Finally, to provide a recreation area for residents throughout the region.First, to provide additional drinking water for the Chester County Water Resources Authority, alleviating a previous shortage.Following completion of the dam, the lake gradually filled over the course of three years.Formation of Marsh Creek Lake was designed to address several water related problems in the region.From 1970-1973 the state constructed the dam and cleared the valley of trees, structures and other obstacles.Residents in the area were relocated including those residing in the farming village of Milford Mills.Second, to limit potential damage caused by seasonal flooding in the area.the site of which was eventually innundated