construction of by pass arrangement by excavation / removal of silt, aggregate, boulder, pebblesand breaking of stones with hammer manually, disposal of all excavate material into a lead of 20mters and lift upto 1.5meter , disposal material to be neatly dressed-filling available excavated earth in trenches , plinth, sides of foundations etc. in layers not exceeding 20cmin depth, consolidating each deposied layer by ramming and waterng , lead up to 50 m and lift upto 1.5 m ( including rock ) 3 providing and laying gunny bags filled with wxcavated silt stiching and laying in position as directed by the engineer in charge. 4 excavation / removal of silt, aggregate, boulder, pebbles and breaking of stones with hammer manually from the bypass arrangement and disposal of alll excavated materialinto a lead of 20 meters and lift upto 1.5 m, disposed earth to be neatly dressed in trench chiselling / wedging out of rock where blasting is prohibited ( soft rock ) .