Construction of RCC isolation stoppings for sealing Incline Nos. 9/10 and Air Shaft, packing with RCC walls in Air Shaft Gallery, and dismantling/transportation of main mechanical ventilator with associated components at 9/10 UG Mine. Construction of RCC isolation stoppings for sealing Incline Nos. 9/10 and Air Shaft, packing with RCC walls in Air Shaft Gallery, and dismantling/transportation of main mechanical ventilator with associated components at 9/10 UG Mine.