The Korb clay mine contributes many AMD discharges to Little Anderson Creek and an unnamed tributary to Anderson Creek. The mine is located in the Chestnut Grove area. The Korb clay mine was a deep mine that was covered by a coal seam. Much of the clay mine has collapsed making the conditions worse due to the coal seam interacting with existing AMD in the clay mine. This has produced particularly acidic and metal rich waters.
ACWA worked with New Miles of Blue Stream and Alder Run Engineering to design a restoration project for the land surrounding this mine to decrease the amount of water entering the mine and use alkaline material to improve the water quality. This work was completed in 2013 and the water that drains from the site is much improved.
ACWA has worked with many partners to complete this project includingPike Township, Clearfield County Conservation District, PADEP–Moshannon District Mining Office, Clearfield County Senior Environment Corps, and the landownersLarry and Vonnie Centra.