Construction of Rain Water Harvesting at Govt. Polytechnic Sald Mahadev Under Nainidanda Block

(A)- PVC Collecting Pipe line Work Demolishing cement concrete manually/ by mechanical means including disposal of material within 50 metres lead as per direction of Engineer- in - charge. Nominal concrete 1:3:6 or richer mix (i/c equivalent design mix)

Excavating trenches of required width for pipes,cables etc including excavation for sockets ,and dressing of sides,ramming of bottom,depth upto 1.5 m ,including getting out the excavated earth and than returning the soil as required,in layers not exceeding 20 cm in depth,including consolidation each deposited layer by ramming ,watering etc and disposing of surplus excavated soil as directed by within a lead of 50 meter.SOR Sl.No. 2.10.1.2 (CPWD 2018)

Providing and fixing of PVC pipe , 6.0 Kg/sqcm of following size with all materials,carting up to site of work, Laying & Jointing in trenches with down pipes including all PVC plain ended or threaded fittings, PVC solvent cement,all labour, T & P etc. with testing of pipe line complete in all respects. 110 mm dia.PVC pipe. 110 mm dia down PVC pipe

Construction masonry chamber 60x45x45cm.,inside with 75 class designation brick work in cemnt mortar 1:4 (1 cemnet :4 coarse sand) with cover, inside cement plastering mortar 1:2, 12 mm thick finished with afloating coat of neat cement complete as per standard design . as per unit estimate

(B) Filter chamber Construction of Brick masonary filter double Chamber 1.75x 1.5 x 1.6m with 1.5x0.25 x1.6 m collecting chamber as per type design including inside plaster in Cement mortar 1:4 ( 1 cement : 4 coarse sand) including RCC top slab 1:2:4 mix. (1 cemen t: 2 coarse sand :4 aggregate), necessary excavation,foundation concrete with all material, labour, T & P etc. etc. complete in all respects. ( As Per Unit Estimate )

(C) Storage Construction of below 1.0 m of GL underground RCC CWR with all material, labour. T & P etc. complete in all respect.

200.0 KL RCC CWR

Providing & fixing of electronic water level indicator complete in all respect.

(D) Perculation System Construction of 2.00x2.00x4.00 mtr. Recharge pit over recharge bore as per typed design.

Constructing masonry Chamber 60x60x75 cm inside, in brick work in cement mortar 1:4 (1 cement : 4 coarse sand) for sluice valve, with C.I. surface box 100mm top diameter, 160 mm bottom diameter and 180 mm deep ( inside) with chained lid and RCC top slab 1:2:4 mix (1 cement : 2 coarse sand : 4 graded stone aggregate 20mm nominal size ) , i/c necessary excavation, foundation concrete 1:5:10 (1 cement : 5 fine sand : 10 graded stone aggregate 40 mm nominal size) and inside plastering with cement mortar 1:3 (1 cement : 3 coarse sand) 12 mm thick, finished with a floating coat of neat cement complete as per standard design : With common burnt clay F.P.S.(non modular) bricks of class designation 7.5