Making and Repairing of 2 Nos. of 48 barrel pontoon for dewatering of coal face Sump and Fabrication of 2 Nos. of 48 barrel pontoon for dewatering of coal face Sump at Khottadih OCP under Pandaveswar Area Making and Repairing of 2 Nos. of 48 barrel pontoon for dewatering of coal face Sump and Fabrication of 2 Nos. of 48 barrel pontoon for dewatering of coal face Sump at Khottadih OCP under Pandaveswar Area