tender for construction of 30000ltr oht (12m) at kolathur head of ariyur at mohanur block in namakkal district under mines & minerals - 2025 - 2026 , earthwork excavation and dwposition on bank with an initial lead of 10m and lift of 2m in the following classification of soils as directed by board officers.hard stiff clay, block cotton, hard red earth, shales, murram, ordinary gravel, stoney earth and earth mixed with small size boulders for foundation ss 20b , first depth of 2 m , second depth of 2 m , cement concrete 1:4:8 (one cement four sand and eight aggregates) using 40mm hbgs for levelling course for fooundation including the cost of mixing concrete, ramming, curing etc., complete as directed by board officers. , brick work in following cement mortar using best quality fly ash bricks of size 23x11x7cm for foundation and basement including curing etc.,complete complying with standard specification. , cement concrete 1:2:4 mix using 20mm iss metal including cost and conveyance of all materials to site and all labour charges for mixing,laying and curing etc complete for 10 cum. , plastering with cement mortar 1:5 (one cement and five m.sand), 12mm thick in all floors including curing etc. complete complying with standard specification and as directed by the departmental officers. , reinforced cement concrete 1:11/2:3 using 20mm hbg metal excluding cost of reinforcement, centering, shuttering strutting, but including cost of mixing concrete, placing, vibrating with mechanical vibrator, finishing , for items 1.5 m to 4.5 m below gl , for items 0 to 1.50 m below gl , for items 0 to 4.5 m above gl , for items 4.50 m to 7.32 m above gl , for items 7.32 m to10.98 m above gl , for items 10.98 m to 14.64 m above gl , for items 14.64mto18.30mabove g l , provinding steel centering using ms plates of size 90cmx60cm 13 grade to 10 grade thick welded with 25mmx25mmx3mm ms angles supported with country wood stantling of size 10cmx6.5cm at 90 cm c/c strutting with casurina pr