LABRADOR IRON MINES HOLDINGS LIMITED James Mine Dewatering was required to lower the water table in the immediate vicinity of the pit. Cessation of flow from the James North and South Spring to the Un-named Tributary. Lost flow was supplemented with Dewatering Wells.
A re-design of the James Pit was required. The removal (de-watering) of approximately 500m of the upstream section of the unnamed tributary was required and a diversion pipe was installed to bypass the de-watered section and to deliver flows into the downstream section. November 2013 the James Pit was exhausted, 2013 production: 1.7 million tonnes (dry)
James Pit dewatering wells were systematically shut down and the pit allowed to flood.
2010 2011 2012 2013
2014
2015
Production commenced at the James Mine: 400,000 tonnes (dry)
Production: 1.5 million tonnes (dry)
The Redmond Creek Habitat Compensation Facility was constructed in August - September 2013.
Re-establishment of flow into the Un-named Tributary after pit flooding July 2015.
Property Location Map Labrador Iron Mines LimitedLabrador, Newfoundland
Property Location Map
Modified after: Watts, Gniffs & McOuat Limited
James Mine DewateringAlterations to the Un-named Tributary:
In 2010 prior to the development of James Pit the source of flow to the Un-named tributary were natural springs (James North and James South) under the proposed Pit.
In May 2010 a Letter of Advice was received from DFO authorizing:
disruption of the natural spring flows and the installation of de-watering wells along the pit perimeter
pumping of water into the Un-named Tributary to
provide minimum flows and to maintain fish habitat.
Labrador Iron Mines Holdings Limited published this content on 19 May 2016 and is solely responsible for the information contained herein.
Distributed by Public, unedited and unaltered, on 23 May 2016 06:37:05 UTC.
Original documenthttp://www.labradorironmines.ca/pdf/UnnamedTributaryPresentation.pdf
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