tender for providing plumbing main pipe line at balaji garden to oht in thiruvennainallur town panchayat.; 1 earth work excavation for 140 mm hdpe pipe and depositing on bank with initiallead of 10 m and lift of 2 m in narrow trenches for layingof pipes for water supply and sewerage works in thefollowing type of soils as directed by departmentalofficers such as hard stiff clay, stiff black cotton, hard red earth, shales,murram gravel, stoney earth and earth mixed with smallsize boulders and hard gravelly soil.one cubicmetre including refilling 2 supplying and delivery of 140 mm dia pn 6 hdpe pipe includind all cost of materials and other chrges etc complete complying with standard specifications 3 lowering hdpe pipes and specials to trench and laying to proper grade and alignment and as directed by the twad officers 4 refilling with excavated earth other then sand complying with standard specifications includingall labour charges etc.completed 5 supplyand delivery 125 mm gm gate valve as per is bs 5154 and related is specifications including etc., completed