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MR21-319 2.05-11.2 07/27/21 <br />• Barricade Chamber Access Escape Shaft <br />• 10-Right Dewatering Boreholes 1 and 2 <br />• Substation No. 11 (NMD) Power-Drop Borehole <br />• NW Mains Ventilation Shaft and Borehole <br />• 6-Main North Ventilation/Escape Shaft and associated utility boreholes (7) <br />• EMD Ventilation/Escape Shafts (2, sealed in late 2009) <br />• 18-Right Ventilation/Escape Shaft (sealed in late 2009) <br />• 18-Left Ventilation Intake and Return Shafts and associated utility boreholes <br />• 19-Right Mine Dewatering Borehole <br />• 16-Left Utility Borehole <br />• 17-Left Cement (WMD Stabilization) Borehole (sealed in 2013) <br />• 15-Left Ventilation Shaft (permitted, pad constructed. Shaft and Rock dust tank installation withdrawn) <br />• 5-Main North Borehole <br />• 10-East Emergency Borehole (permitted but not completed) <br />• SWMD Thickener Underflow Borehole <br />• Sandstone Sub Thickener Underflow Borehole <br />• SWMD and WMD Thickener Underflow boreholes (2) <br />• 7-East Cross Entries Cement Borehole <br />• 18LT Dewatering Borehole <br />