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When the raise bore bit is lifted to within 5 feet of 'the hole completion; the miners wall withdrawn from the mine and the power removed in the''~til the hole is completed. At this time the. mine ventilation will be examined in its entirety and the necessary changes will be made before returning to work, All it from h pilot hole,wi~ l~~e vent to the eturn. ..~/i,~G~,~1~~ 6-~.~i,tit+'~ r""'T'~ P -~ ..a,~c.~-r,Q.A ~.te, ,~6d'i ~ liu'in mining of the shaft, the ventilation will be directed and regulated to the return to ensure a minimum quantity of 3000 CFM in the shaft. A sufficient quantity of air will be maintained in the "bleeder entries" to ensure the methane concentration is less than 1 0. Drawing attached (Excavation Ventilation) Shaft Completion: Following the ccmpletion cf the shaft, an exhaust fan will be installed on the shaft. The fan will be installed and cperated in accordance with the requirements of 75.300 Mechanical Ventilation - Main Fan. When the fan becomes operational the air courses will be examined for "dead" areas and corrective action taken to eliminate them. In the event the longwall becomes operational before the shaft is completed, the shaft will be intaking and the air flow for the longwall will be directed thru the bleeder entries. Drawing attached (Completed Ventilation with and without fan). The following lists the specifications for the ex'raust fan. Mfg. Jaffrey Model 12A83 Type. Axial Vane Speed 880 RPM (minimum) Horsepower 400 hp (minimuml Voltage 4160 v (Independent power circuit) Automatic self closing doors Automatic signaling device Explosion doors Fan charts for the anticipated fan speeds for the life of the installaticn are attached. The existing TLT Babcock exhaust fan located in Cirulea Canyon will be fitted with automatic self closing doors prier to - Y commissioning the i4W-1 exhaust fan. t~PP~CVF.D CMS ~ N ~t ~R ~! ~ ~~ ~~ TTAT-1 Fcnon~i Cl.of i- A