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Project Details
Original Construction Year 1988
Most Recent Rebuild Year 2012
Total Cost 0.00
Total Capital Cost $0.00
Latitude / Longitude Method Unknown
Latitude 41.008611
Longitude -80.000000
Elevation 0
Project Jennings
Project Type Passive Treatment System
Project Status Good/Operational
AMD Source Underground
Stream Big Run
River Basin Ohio
Quad Slippery Rock, PA
City/Township Brady Township
County Butler
State PA

Description: The Jennings Passive system is located at the Jennings Environmental Education Center, a Pennsylvania State Park, near Slippery Rock, PA in Butler County. The site has served as both a research and education/outreach site for both the Slippery Rock Watershed Coalition (SRWC) and the park itself. The site has been also used by numerous governmental agencies and educational institutions to conduct research on AMD and passive treatment including US Bureau of Mines, US Department of Energy, PA DEP, Slippery Rock University, Grove City College, and Westminster College to name a few. The original passive system consisted of a series of wetlands that were constructed around 1988 following the blowout of an underground mine seal completed during Operation Scarlift. Then around 1994, an Anoxic Limestone Drain was installed, but quickly plugged due to the ferric iron and aluminum. An innovative Vertical Flow Pond (VFP) was constructed in 1997 using a mixture of compost and fine (#9 special) limestone as the treatment media. After 15 years of operation the treatment media was replaced in 2012 with a slightly different treatment mixture consisting of compost, wood chips, and 2B limestone.

Water Quality Data Summary

Treatment Technologies
Treatment Technology Quantity Status
Aerobic Wetland 5 N/A
Anoxic Limestone Drain (ALD) 1 N/A
Settling Pond 1 N/A
Vertical Flow Pond (VFP) 1 N/A
Location Links
GPS Directions
Project Contacts
Contact Person:
Contact Organization: Stream Restoration Inc.
Project Designer: Charles Cooper
Project Designer Organization:
Project Responsible Organization: Stream Restoration Inc.
External System IDs
Title System
D1-43 Datashed 1.0
PA-110 OSM
Project Performance