tender for annual plan-spra-209/26-kallippara dwss maintenance-general civil work -- 1 dwss maintenance 2 od251533/2025-2026:supply and fixing 50 mm dia 10 kg/cm2 hdpe pipe ,pe-80 including specials and all fitting charges but excluding trenching and refilling etc complete 3 od251534/2025-2026:supplying and fixingstand alone tap 4 18.17.4:providing and fixing gun metal gate valve with c.i. wheel of approved quality (screwed end) :50 mm nominal bore 5 4.1.5:providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - all work up to plinth level:1:3:6 (1 cement : 3 coarse sand (zone-iii) derived from natural sources : 6 graded stone aggregate 20 mm nominal size derived from natural sources) 6 2.13.1.1:excavating trenches of required width for pipes, cables, etc, including excavation for sockets, depth up to 1.5 m including getting out the excavated materials, returning the soil as required in layers not exceeding 20 cm in depth. including consolidating each deposited layers by ramming, watering etc., stacking serviceable material for measurements and disposal of unserviceable material as directed, within a lead of 50 m:ordinary rockpipes, cables etc. not exceeding 80 mm dia