South Bay: implications of the draining of mill pond / review prepared for M. Kalin, Boojum Research Ltd, Toronto
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Date
1998-10
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Vonhof Consulting Ltd, Calgary, Alberta
Abstract
Mill Pond is located to the east of a topographic divide on the mill site. It receives surface
runoff and shallow groundwater discharge. At the northeastern/ eastern part a small dam
has been constructed.
The surface elevation of the water level in Mill Pond is such, that it is higher than the
elevation of the seeps WHS and WHSS. Mill Pond could, therefore, be a source of water
contributing to these seeps. Unfortunately, there is neither shallow stratigraphic
information nor information with respect to the configuration of the bedrock surface
between Mill Pond and the seeps to indicate a potential path for the shallow
groundwater. Furthermore, it would be next to impossible to obtain this information,
because of the effect of the decommissioning and subsequent landscaping of the mill
site.
The only way to determine a possible inter-relationship between the seeps and Mill Pond
is to drain the pond temporarily and observe the effect of the draining. The experiment
was started on June 3, 1998, after a siphon, which drains towards Boomerang Lake, had
been installed in the Mill Pond. Daily and on occasion multiple daily measurements were
taken of the flow at various locations on the mine site, the water levels in piezometers,
shaft, PRC, etc. Furthermore precipitation was recorded, as well as basic chemical
parameters were measured and water samples were collected for future analysis.
Description
Keywords
ecological engineering, South Bay Mine, draining, Mill Pond