The concentration of aluminum in the tunnel's waters is 1.27 milligrams per liter and the daily load is 8.7 pounds (3.9 kg).
[3] On April 15, 1975, the concentration of nitrogen in the form nitrates was measured to be 0.08 milligrams per liter in the waters of the Catawissa Tunnel.
This is fairly close to the discharges of the other mine drainage tunnels in the watershed of Catawissa Creek.
[1] It is approximately 840 feet (260 m) long, making it the shortest mine drainage tunnel in the watershed of Catawissa Creek.
[3] The proposed passive treatment system for the Catawissa Tunnel would be capable of treating 3,000 gallons of water per minute.
This would require 1,750 tons per year of limestone rock with high concentrations of calcium carbonate.
[2] Its purpose is to drain water from deep mines in the South Green Mountain Coal Basin via gravity.
[2] Data on the discharge of the Catawissa Tunnel was collected continuously between July 1974 and September 1976.
[3] The Catawissa Tunnel is not on the Pennsylvania Section 303(d) list of streams that are impaired due to pH.