Surat Lignite Power Plant- 4X125 MW, Unit # 1 to 4: Replacement of existing damaged & unsafe roofing & cladding sheets with new Color coated Galvalume sheets, Roof Gutters with Aluminum sheets and Rain water pipe lines with new U- PVC pipes for ESP- 1, ESP- 2, ESP- 3, ESP- 4 and Unit- 3 & 4 Deaerator roofs at Power Plant.