31 Deloit te T ouc he Inc Project: Faro Mine, Faro, Y ukon T erritory , Canada. Scope: A fresh water supply dam about 20.5m high and 4 10m long was no longer needed, and presented a risk to the downstream receiving environment. A decision was taken to breach the dam. SRK, with support from several other consulting frms, led the design, planning, permitting and decommissioning of the dam. Outcome: The project was completed on time and budget. Some minor post construction modifcations were required in relation to material placement in winter , but the breach and related works have been performing as designed. Ma’aden Project: Umm W u’al phosphate mine, Saudi Arabia. Scope: Locate and assess groundwater resources and design a well feld to supply the proposed mine. Outcome: A preliminary feld investigation and desk study were conducted to select the best well feld site and aquifer for further drilling investigations. Supervision of drilling and construction of three boreholes up to 900m deep in the T awil Sandstone aquifer was followed by hydraulic testing. Detailed conceptual and numerical groundwater models were then used to assess the aquifer’ s long- term sustainable yield and potential impacts on other groundwater users. Indian and Nor thern Af fair s Canada Project: Creek relocation, Giant Mine, NWT , Canada. Scope: Baker Creek was relocated away from an open pit through areas with 30ground ice in clay soils, so settlement was a concern. The creek bed design allowed for fooding and natural movement of bedding material. Outcome: The channel has performed as designed, with minor settling flled in by the mobile bed load. Fish surveys three years after completion indicate high returns. DFO (federal fsheries regulator) has brought department engineers from across Canada to see this successful case study . Molycorp Questa Project: Questa Mine, New Mexico, USA. Scope: Evaluation and remote monitoring of underground mine infows to characterise sources of infow; develop a water and chemical load balance; tracer tests to evaluate fow pathways in the overlying rock; and develop a management plan for operational and storm water infows. Outcome: Using a digital fow monitoring system, SRK identifed the sources, quantities and chemistries of various source waters, and distinguished those source waters from surface water captured by a subsidence zone and conveyed to the underground. Continuous fow measurement of seepage from rock pile, Questa Mine, New Mexico