tender for maintenance of cds under sub dn. no.2 bhind- 2.3 dumantling of structures diamanding of existing structures e culverts, bridges, retaining walls and other structure comprising of masonry, cement concrete, wood, s, including t&p and scaffolding wherever necessary, sorting the diamantled material, disposal of unserviceable maternal and stacking the serviceable matalal with all lifts and lead up to 1000 mebers b) cement concrete grade m-18 & m-30 removing at type of hume pipes and stacking within a lead of 1000 meters including earthwork and dismantling of masonry works al-up in 600 mm dia above 600 mm to 300 mm dia c) above 100 mm 81-pccm-15 in fund plan cement concrete m-18 mix with crushed stone aggregate 40 mm nominal size mechanicaly mored placed in foundation and compacted by vitination induting curing tor të days as per mortsh specification 400 9.2. providing and laying reinforced cement concrete pipe np4/presinsed concrete pipe on first casa bedding in single row providing and laying reinforced cament concrete pipe np4iprestrsed concrete pipe for couverte on first class bedding of granular material icoat of bedding included in single row induding tieng collar with cement mortar 1:2 but excuding excavalion, protection works backfing, concrete and masonry works in head walls and parapens a) 600 mm 1000 mm dia 18.3-providing and layang reenforced cement concrete pipe np 4 preetsed concrepe on first class bedding in double row providing and laying renforced cement concrete pipe ne денти concrete pipe for culverts on test class bedding af granular material cost of bedding included) double row including fixing collar with coment mortar 12 but excluding excavation, protection works hacketting, concrete and masonry works in heat watts and parapets a) 600 mm dia 8)-1000 mm dia