estimate for the cost of maintenance of ep wall at sukumarankolly in muthanga range during 2025-26-2 demolishing stone rubble masonry manually / by mechanical means including stacking of serviceable material and disposal of unserviceable material within 50 metres lead as per direction of engineer -in- charges:in cement mortar 3 random rubble masonry (by collection of stone from the damaged part and supply of additional stone required) in superstructure above plinth level, including leveling up with cement concrete 1:6:12 (1 cement : 6 coarse sand : 12 graded stone aggregate 20 mm nominal size) including conveyence etc