Clarks Creek (also known as UNT 28600 of the Lackawanna River) is a tributary of the Lackawanna River in Wayne County, Pennsylvania, in the United States. It is approximately 2.2 miles (3.5 km) long and flows through Clinton Township. The watershed of the creek has an area of 3.37 square miles (8.7 km2). The creek has no named tributaries, but does have two unnamed tributaries. It is not considered to be impaired. The pH of the creek is slightly acidic and the concentration of water hardness is 12 milligrams per liter. Metals such as magnesium, calcium, chromium, manganese, iron, nickel, copper, zinc, cadmium, aluminum, lead, and arsenic have been observed in the creek's waters in various amounts. It is a freestone stream in the Lackawanna Valley. The surficial geology in its vicinity main