 The water authority built a multimillion-dollar water filtration plant in the 1990s in Mosquito Valley.With the construction of this plant, the lands of the water authority were opened to the general public as a nature preserve, with limited hunting permitted at certain times of the year.Limestone Township is bordered by Washington Township to the south and east, Armstrong Township to the east, Bastress and Nippenose Townships to the north, and Clinton County to the west.