Laurel Run Treatment System #1 is designed to treat 100 gallons per minute of acidic mine drainage, flowing from an abandoned underground mine in the headwaters of Laurel Run. The passive treatment system consists of two vertical flow ponds built in parallel and a 1/2 acre polishing wetland. This system was constructed by Stream Restoration, Inc. in 2001 and was funded by Foundation for PA Watersheds, NRCS and PaDEP Growing Greener grant. An additional vertical flow pond was constructed in 2016, after a surface mine operator completed backfilling. Laurel Run Treatment System #1 is located in Center Township, Indiana County. Quarterly water quality samples are collected from the system. Reports, maps, photos, and water sampling results have been posted on the Datashed website at www.datashed.org.