Labrador Iron Mines Holdings Ltd. · OTC:LBRMF
Labrador Iron Mines — Technical Presentation (May 2016)
28 slides from Labrador Iron Mines's technical presentation, May 10, 2016
Slide 1: Rehabilitation and Closure: Re-establishing Flow to the Un-named Tributary
Labrador Iron Mines Holdings Limited Rehabilitation and Closure May 10, 2016 Re-establishing Flow to the Un-named Tributary
Slide 2: Evolution of the Un-named Tributary
Evolution of the Un-named Tributary James Mine Dewatering was required to lower the water table in the immediate vicinity of the James Pit dewatering wells were pit. Cessation of flow from the James North systematically shut down and the pit A re-design of the James Pit was required. The removal and
Slide 3: Property Location Map
Property Location Map Labrador Iron Mines Limited Labrador, Newfoundland Property Location Map Modified after: Watts, Gniffs & McOuat Limited
Slide 4: James Mine Dewatering
James Mine Dewatering Alterations 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: • d
Slide 5: James Mine Dewatering
James Mine Dewatering The James Mine was operated seasonally from May 2011 through November 2013. LIM operated a series of 11 Perimeter Dewatering Wells to maintain pit wall stability • Ground water flow was redirected from the James Mine open-pit to the Un-named tributary (UNT) as well as James Cre
Slide 6: James Pit Expansion
James Pit Expansion Un-named James Pit Tributary
Slide 7: James Pit Expansion
James Pit Expansion 1. In 2013 the re-design of the James Pit was required due to two concerns: 1. Structural Integrity of the Pit Wall: 2. Access to additional ore: 2. The re-design required the removal (de-watering) of approximately 500 metres of the upstream section of the unnamed tributary and t
Slide 8: Alterations to the Un-named Tributary
Alterations to the Un-named Tributary Labrador Iron Mines received a Fisheries Authorization from the Department of Fisheries and Oceans for the removal of approximately 5,662m2 of fish habitat contained within the upper 500m section of the Un- named Tributary to accommodate the future extension of
Slide 9: James Pit Expansion: Un-named Tributary Diversion Pipeline
James Pit Expansion: Un-named Tributary Diversion Pipeline
Slide 10: Fish extraction under Scientific License
• A Scientific License was obtained from the Department of Fisheries and Oceans prior to the fish extraction that took place in the Un-named Tributary from April 26th to 28th, 2013 • The fish extraction was conducted over a two day period prior to the de-watering of the tributary and for one day fol
Slide 11: Off Set Plan for fish habitat loss
An Off Set Plan was approved by DFO to compensate for loss of 5,662 m2 of fish habitat in the Un-named Tributary. The Redmond Creek Habitat Compensation Facility was constructed in August – September 2013.
Slide 12: James Pit Before Flooding, 2013
Unnamed Tributary James Pit Before Flooding, 2013
Slide 13: Re-establishment of Flow to the Un-named Tributary
Re-establishment of Flow to the Un- named Tributary Following the cessation of mining in November 2013, the dewatering perimeter pumps were shut down in May 2014 and the filling of the James Pit began. Thus the pumping into the Un-named Tributary was halted resulting in the temporary de-watering of
Slide 14: James Pit Overflow Event: July 2015
James Pit Overflow Event: July 2015 The end result of discontinuing pit dewatering pumping has been the filling of James Mine to approximately 520 masl (metres above sea level) and the re-establishment of water flow into the Un-named Tributary.
Slide 15: James Pit flooding assessment
The James Pit flooding assessment prepared by WESA in 2014: • Estimated the flooding period to be 1-1.5 years, Spring 2014-Summer 2015 • Predicted retention and settling time would be adequate to achieve compliant discharge turbidity results upon overflow into the Un-named Tributary LIM continuously
Slide 16: Over Flow into the Un-named Tributary
Over Flow into the Un-named Tributary
Slide 17: Fish removed by electrofishing and released into Bean Lake
Fish were removed from the stream by electrofishing and released alive into Bean lake immediately prior to and following de-watering
Slide 18: Mitigation Measures
Mitigation Measures Temporary filter cloth barriers to aid in initial Hay bales to aid in filtration, control water flow, and sediment removal divert flow into vegetated areas
Slide 19: Mitigation Measures
Mitigation Measures Screens were installed at the road culvert to prevent fish from moving into the stream until water quantity and quality were stabilized.
Slide 20: Sampling Locations
Sampling Locations Sampling, to monitor the quality of water originating from James Pit was conducted at four representative locations; the outlet of James Pit, halfway down the UNT, the inlet into the road crossing culvert, and the inflow into Bean Lake.
Slide 21: Sampling Results
Sampling Results Regulated TSS Levels: • 30mg/l for a single sample 15 mg/l as the monthly mean of all samples
Slide 22: TSS Levels James-Pit-Out
TSS Levels James-Pit-Out ee Location: JAMES-PIT-OUT ‘Monthly Average
Slide 23: TSS Levels UNT
TSS Levels UNT —#Sample Location: UNT. B Monthly average 3 3
Slide 24: TSS Levels UNT - Inlet to Road Crossing Culvert
* TSS Levels UNT - Inlet to Road Crossing Culvert =F Fomple Location: let atthe crossing culvert ae Monthy average
Slide 25: All Sampling Results were well below Regulated Levels
All Sampling Results were well below Regulated Levels
Slide 26: Fish Re-enter the Un-named Tributary
Fish Re-enter the Un-named Tributary A DFO representative visited the Site on August 8, 2015 to assess the habitat conditions in the Un-named Tributary. After reviewing the sampling results and inspecting the creek conditions it was determined that the water quality was at a level to allow fish to r
Slide 27: Conclusions and Lessons Learned
Conclusions and Lessons Learned • Innovative technical and environmental solutions were successful in minimizing environmental effects • Solutions employed were cost effective • The hydrology model accurately predicted pit overflow timing; July 2015 • Cooperation with Federal and Provincial Regulato
Slide 28: Environmental Policy and Guiding Principles
Environmental Policy and Guiding Principles Labrador Iron Mines Limited (LIM) is committed to conducting operations in an environmentally responsible manner by maintaining a high standard of environmental responsibility and performance. Our goal is to minimize the environmental footprint at all oper
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