GROUNDWATER NEUTRALIZATION
of AMD at AUGUSTA LAKE
Ongoing work to neutralize Augusta Lake has been direct
treatment of the lake, and treatment of AMD
surface flow into the lake. The third phase of this project entails
direct neutralization of AMD at the source, within the acid bearing spoil banks.
To accomplish this, calcium hydroxide is being applied to neutralize acid
groundwater flowing into the lake. Within the drainage basin of the lake,
strategic locations have been excavated, and calcium hydroxide, donated by Airgas,
Inc. is applied.
For more info on this project contact Mike
Kalagian.
For more information on the Patoka Southfork Watershed Steering Committee
contact Tom Mosley at psfwsc@sigecom.net
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This filled pit of calcium hydroxide at Airgas
Mid-America contains approximately 2,000 tons of the
neutralizing material. Over 247 tons was moved to August Lake in 1999. |
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A tracked backhoe removes calcium hydroxide and loads it
into a truck, sealed liner, for transport to the lake. |
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View of a trench for placement of the calcium hydroxide.
Numerous excavations similar to this trench have been made within the
drainage basin for placement of the calcium hydroxide. |
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View of calcium hydroxide being unloaded. |
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View of trench after calcium hydroxide has been added. |
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View of excavated hole. This location was selected because
it is the focal point of AMD from a former incline/end-cut lake of the
mine. During the drought of 1999, this hole contained water during
excavation. |
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View of former excavated hole filled with calcium hydroxide. |
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