The Northumberland County Conservation District recently completed the first mine drainage treatment in the Shamokin Creek watershed. The numerous project partners are listed at the bottom of this page.

Construction at Scarlift Site 42 began on November 9, 1999 and was completed in the Fall of 2000. Click to see images of the construction and operation from November 14 and 24, 1999, February 5 & 12, 2000 , March 4 through September 27, 2000, October 4, 2000, including fish collected in Carbon Run., and the June 28, 2001flushing of iron oxides from the limestone, wildlife observed at the site, and system modifications.


View chemistry and flow monitoring data from Site 42 and selected Carbon Run stream locations.

Click to see a low-altitude aerial video clip of Site 42 under construction. It may take a while to download this video clip file. A lower resolution clip (shorter download time) can be downloaded by clicking here. This footage provided by Heli-View.

Check out the discharge and temporary V-notch weir installed by volunteers and used to measure flow rates at Site 42. Both of these pictures were taken before the treatment system was installed.

Definition of the Problem

Goals and Objectives

The treatment system consists of three ponds, beginning with a successive alkalinity producing system (SAPS) to add alkalinity, followed by a second constructed oxidation/settling pond (average depth of 1 m). A nearby strip pit pond was used as a final settling pond for sludge. The total pond area is approximately 1.2 acres.

The SAPS design is experimental. In addition to limestone, part of the water flows through steel slag, allowing the pond pH values to be adjusted. Accurate flow rate measurements can be made at two sets of standpipes.

Bucknell University students conduct research on AMD treatment at this site, and SCRA volunteers will help to monitor the system. The system will be designed to operate with minor maintenance for approximately 25 years.

Funding and support

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