A watershed is a large basin where all precipitation that reaches the ground travels across the topography to the lowest drainage point. We are working to keep our streams and rivers healthy by making improvements throughout the watersheds in Clarion County that have been impacted by acid mine drainage and non-point source pollution.
Why are so many streams in Clarion County orange?
Acid Mine Drainage (AMD) is formed when pyrite, an iron sulfide, is exposed and reacts with air and water to form sulfuric acid and dissolved iron. Some or all of this iron can precipitate to form the red, orange, or yellow sediments in the bottom of streams containing mine drainage. The acid runoff further dissolves heavy metals such as copper, lead, mercury into ground or surface water. (USGS)