NIT for repairing and water proofing of roof of Cable Gallery, construction of drain and strengthening of existing cable racks at PPH and replacement of damaged cable trench covers and repair of flooring at various location in 220 kV S/yard Talwara. NIT for repairing and water proofing of roof of Cable Gallery, construction of drain and strengthening of existing cable racks at PPH and replacement of damaged cable trench covers and repair of flooring at various location in 220 kV S/yard Talwara.