Description: The discharge is located roughly two miles northwest of the town of Oneida in Schuylkill County, Pennsylvania. The Oneida #3 Mine Tunnel was driven 7,000 feet north of the actual mine to drain the mine water to the Tomhicken Creek, and it drains portions of the South Green Mountain Coal Basin. The Oneida #3 Mine Tunnel Discharge is the second largest discharge to the Catawissa Creek with an average flow of 4,000 gpm, a pH of 4.6, net acidity of 15 mg/l, total aluminum of 2 mg/l, total iron of 0.2 mg/l and total manganese of 0.5 mg/l. The system was designed similar to the Audenreid Treatment System, but only needed 2 limestone filled tanks. Due to limited Growing Greener grant funding and increased construction costs, only 1 tank was installed, but the system may be expanded when money funding is available.