Penrice mine groundwater reports
Aquaterra reports |
Summary of scope of hydrogeological investigations in progress on the Penrice Angaston Quarry
Predictive assessment of the potential impacts on the hydrogeological system at the mine and surrounds post mine closure.
- Aquaterra's Hydrogeological Assessment for Mine Closure Planning, 15 July 2009 (.pdf 1Mb, opens in new window)
- Aquaterra's Hydrogeological update 5 August 2009 (.pdf 3.5Mb, opens in new window)
PIRSA's response to the Aquaterra Report:
Note: from 1 January 2012 the Mineral Resources Division, formerly part of the Department for Primary Industries and Resources South Australia (PIRSA), transitioned to the Department of Manufacturing, Innovation, Trade, Resources and Energy (DMITRE)
- The scope of the report was restricted to impacts of the quarry closure and does not include impacts of the quarry deepening over the next 25 years.
- Does the deduction of an 'aquifer sink' model for closure take into account the regional east to west groundwater gradient?
- PIRSA supports the carrying out of pumping tests if it will improve the accuracy of the analytical model, and assist in the determination of the impacts of quarry deepening over the next 25 years.
PIRSA has requested the following be provided:
- an assessment of the zone of influence and drawdown impacts for deepening of the pit to the proposed level of 224 mAHD (or the maximum level if deeper), over the next 25 years. Within this zone of influence, the impacts on existing wells (irrigation and S&D) and watercourses should be quantified. If the zone of influence intersects the Tertiary sedimentary aquifers to the west, what impacts will that have?
- evidence that the regional east to west groundwater gradient will not change the 'aquifer sink' model to a 'groundwater throughflow' model - maybe a 1-D slice model.
Golder report |
Assessment of the potential environmental impacts arising from dewatering activity at the Angaston quarry.
PIRSA's comments on the Golder Report:
Note: from 1 January 2012 the Mineral Resources Division, formerly part of the Department for Primary Industries and Resources South Australia (PIRSA), transitioned to the Department of Manufacturing, Innovation, Trade, Resources and Energy (DMITRE)
- Watersearch (2003) noted the presence of a low conductivity schist rock that would severely limit the connectivity between the marble and the Tertiary sedimentary aquifers to the west.
- A fall in groundwater level of 50–70m occurs from the fractured rock inthe east, across the quarry site to the sedimentary aquifers to the west.
- The report is mainly concerned in determining the impacts of the quarry on a private well. It does however delineate zones of 'most likely' and 'likely' zones of influence at the current pit base of 267 mAHD. The western margin of the 'likely' zone apears to be very close to the Tertiary sedimentary acquifers to the west.
- The report does not address the likely impacts of deepening the Penrice Pit to the proposed level of 224 mAHD.
- Page URL: http://www.pir.sa.gov.au/minerals/mines__and__developing_projects/approved_mines/penrice_mine/groundwater_reports
- Page Last Modified: March 13, 2012