RE: Scallywag24 Aug 2020 16:51
JJmack - admittedly it was in 2002 but here is the Environmental Protection Agency's (EPA) report on the proposed expansion of the Telfer mine which includes a section on the de-watering and borefield operations.
https://www.epa.wa.gov.au/sites/default/files/EPA_Report/1362_B1059.pdf
"4.2 Dewatering and borefield operations
The EPA’s environmental objectives for this factor are to:
• maintain the quantity and quality of groundwater such that existing and potential
environmental values and ecosystems are maintained (including subterranean
fauna); and
• improve understanding of subterranean fauna through appropriate research
including sampling, identification, and documentation.
Assessment
Dewatering of the ore-body and the abstraction of groundwater from borefields for
processing of the ore, will draw down the groundwater aquifers in the vicinity of the
mine.
These activities are a resumption and expansion of past dewatering and abstraction.
As a result of these past activities the proponent has a good understanding of the
groundwater systems of the mine and borefield areas. Groundwater modeling predicts
that the proposal will result in drawdown of groundwater aquifers over an increased
area, but that this effect will be confined to the local area (that is, within a 10 km
radius of the mine). This modeling has been reviewed by the Water and Rivers
Commission, which is satisfied that all water resource issues and any potential
impacts on these resources can be managed within existing legislation.
The predicted impacts are not likely to have any significant impact on any
groundwater dependent ecosystems. Groundwater levels in the area are naturally 40-
70 m below the ground surface and so the desert vegetation is not dependent on
groundwater."
I don't know if these 40-70m groundwater levels are still in the same healthy state they were in back then but if a new facility were to be built it would be well outside the 10km radius that they discuss here so shoudn't have any impact on the operations at Telfer.
ATB - Paddy