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The Green Mountain Tunnel is a mine drainage tunnel in Schuylkill County, Pennsylvania, in the United States. It is one of five major mine drainage tunnels in the watershed of Catawissa Creek.〔 The tunnel discharges into Catawissa Creek near the Audenried Tunnel and the Catawissa Tunnel. The tunnel was constructed in the 1930s and is slightly less than one mile long. ==Hydrology== The average discharge of the Green Mountain Tunnel is 1,440,000 gallons per day (1,000 gallons per minute or 1.75 cubic feet per second).〔 Although a significant majority of the acid mine drainage discharging into Catawissa Creek comes from the Audenried Tunnel, the Green Mountain Tunnel is one of four other mine drainage tunnels that contribute most of the remaining acid mine drainage to the creek.〔 The pH of the waters of the Green Mountain Tunnel ranges from 3.6 to 4.2, with an average of 4.05. The concentration of acidity in the tunnel's waters is 28.05 milligrams per liter and the daily load of acidity is . The tunnel's acidity load requires a 92 percent reduction to meet its total maximum daily load requirements. The concentration of alkalinity is 3.29 milligrams per liter and the load is per day.〔 The concentration of iron in the waters of the Green Mountain Tunnel is 0.44 milligrams per liter and the daily load is . The iron load requires a 49 percent reduction to meet its total maximum daily load requirements. The concentration of manganese in the tunnel's waters is 0.64 milligrams per liter and the load is per day. The load of manganese requires a 3 percent reduction to meet its total maximum daily load requirements. The concentration of aluminum in the discharge of the tunnel is 2.97 milligrams per liter and the load is per day. The load of manganese requires a 89 percent reduction to meet its total maximum daily load requirements.〔 The concentration of hydrogen ions in the waters of the Green Mountain Tunnel is 0.25318 milligrams per liter. The concentration of sulfates ranges from 75.0 to 96.0 milligrams per liter. The temperature of the water being discharged from the Green Mountain Tunnel was measured to be on April 15, 1975. The water temperature was measured to be on November 7, 1991 at 1:10 P.M. The specific conductance of the tunnel's waters was 210 micro-siemens per centimeter at on the former date and 269 micro-siemens per centimeter at on the latter date.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Green Mountain Tunnel」の詳細全文を読む スポンサード リンク
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