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PPT : LCMR Study of the Hydraulic Impacts of Limestone Quarries and Gravel Pits

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Documented Impacts (cont.)
* Between 1986 and 1992, three domestic well interferences were filed.
* All three wells were located 1000’ to 1300’ from the Fretham Quarry.
* All three wells were constructed into the Galena and were shallower than the depth of the quarries.
* The DNR Division of Waters investigated and determined that the quarry dewatering was the cause of the out-of-water complaints for the three domestic wells
* The company involved agreed to have the homes connected to the municipal water supply
* LeRoy Quarry, Mower County.
* Sub-water table limestone quarry.
* Quarry dewaters at a rate of about 200 to 800 gpm in order to mine.
* Several dye traces have been performed in and around the the quarry to map both the natural and disrupted ground water flow.

LCMR Study of the Hydraulic Impacts of Limestone Quarries and Gravel Pits
Why we did this study.
* Quarries and gravel pits are necessary for society.
* Potential exists for impacts to ground water.
* Many LGU’s have questions about the impacts.
* Little information on those impacts.

The Hydraulic Impacts of Limestone Quarries and Gravel Pits Study was funded by the 2001 Legislature as recommended by the Legislative Commission on Minnesota Resources. Funding is from the Environment and Natural Resources Trust Fund

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PPT : LCMR Study of the Hydraulic Impacts of Limestone Quarries and Gravel Pits Category : Air and Hydraulic
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