GENERAL-Tidal bund 2026-27 CHINGOLIProviding temporary tidal bund (Salinity barrier) for the year 2026-27 across various thodu in Chingoli Panchayath.-General Civilwork

60.8:Shutter for check dams- Supplying and providing Thambagam wood shutter planks 5cm thick including cost of materials and labour charges etc complete

OD12997/2026-2027:Hire charges for one second class boat with two boat men for conveying the coconut post, earth and other needed for putting bund through thode to the site, from the shore as per the direction of department officers at site

OD12998/2026-2027:engaging man mazdoor for loading and unloading material to boat

50.2.25.1:Filling with contractor's own earth ( excluding rock) in trenches, plinth, sides of foundations etc. in layers not exceeding 20 cm in depth, consolidating each deposited layer by ramming and watering, lead up to 50 m and lift up to 1.5 m as per direction of site Engineer-in-charge

OD12999/2026-2027:Forming bund to a width of 1.5 m and 1.5 m (av) height and protecting the sides with 1/2 split well matured and sound coconut post 2.7 m long driving down 1.2 m below ground level on both sides at 1.0 m c/c, providing 2 rows of weiling pieces 1/4 split coconut post on both sides and tying with 1/4 split coconut cross ties at 2.0 m c/c connecting the alternate set of post , and screening the sides of bund with seperation memberane of impermeable plastic sheet 125 micron thick fixed properly using cocnut post and weiling pieces and nails in full height including tying properly using iron wire and coir altogether and supplying and filling inside with cut earth / puddle clay upto 1.5m, level and conveyed with all leads and lifts including consolidating properly and maintaing the bund properly through out the cultivation period including cutting and removing materials and clearing area etc complete as per the direction by the departmental officers at site. Width = 1.5 m , Height = 1.5 m Length of coconut pile = 2.7 m Spacing = 1 m c/c Length of 1/2 split coconut pile required for 10 m = (10/1+1)x2 = 22 Nos x 2.7 m =59.4m Length of 1/4 Split coconut pieces for weiling pieces for 10 m = 2 x 2 = 4 Nos x 10 m = 40 m Length of 1/4 Split coconut pieces for cross ties = 10/2+1 = 6 Nos 2 x 1.5 = 18.0 m Plastic medium sheet = 10.30x1.5x2 = 30.9 m2 Cost of 1/2 split coconut post (Details vide 60.64.2), Coconut post requied for 1 m =59.4/10 = 5.94 m (average length of coconut pile 6 m and dia 25 cm ) Assuming coconut post can be used 2 times No of Coconut pile required for 1 m = 5.94/6 = 0.99 No Carriage of timber = 0.99 x 6 x 3.14 x.125x.125 = 0.291 cum Assuming 2 rows wailing pieces in both sides and 2 cross ties, Total 40+18= 58 m Hence for 1m = 58/10= 5.8 m Total No of Coconut piles 1/ 2 split for 10 m length @ 1.0 m c/c = 10/1.0+1 = 11 Nos. on both sides = 11 x 2 =22 Nos for 1 m length - 22/10 = 2.2 Nos Pile Driving down length = 1.2 m, Total length= 1.2 x 2.2 = 2.64 m Screening the frame with medium quality plastic sheet nailed to wailing pieces and coconut post, Sheet required = 10.3 x 2x 1.5 = 30.90 sqm, For 1 m = 30.90/10 = 3.1 sqm Quantity of earth = 1.5 x 1.5 = 2.25 cum

OD13000/2026-2027:Labour engaged for removing floating materials accumulated near the bund

OD13001/2026-2027:supplying watchman for watching the bund