Mtc. Of Filter bed No. 1 of SWTP (0.72 MGD Capacity) at Garadtilla, Kamalpur, Dhalai, Tripura under DWS Division, Kamalpur during the year 2025-26

Taking out lime stone / graded gravel / filter sand from top slab of sedimentation tank filter bed, through washing by water & placing the whole lime stone / graded gravel / filter sand at original place after washing in IRP as per specification and the direction of the Engineer-in-charge.

Filter bed 1 at SWTP, Garadtilla

Providing and placing rapid gravity filter sand having effective size of 0.50 mm to 1.00 mm & uniformity co-efficient of not more than 1.70 and or less than 1.30 obtained from Barakar river West Bengal as per specification and the direction of the Engineer - in - charge.

Providing and placing filter gravel having effective size of 3.00 mm to 25 mm & uniformity co-efficient of not more than 1.70 and or less than 1.30 obtained from Barakar river, West Bengal as per specification and the direction of the Engineer -in-charge.

Providing and fixing C.I. sluice valves ( with cap ) complete with bolts, nuts, rubber insertions etc. ( the tail pieces if required will be paid separately ) as per CPWD specification and direction of the Engineer - in - charge.

V) 125 mm dia., A) PN - 1.6

X) 350 mm dia. A) PN - 1.6