Details: excavation for structuresearth work in excavation of foundation of structures as per drawing and technical specification, including setting out, removing, spreading or stacking of spoils within a lead of 150 m. as directed and including trimming the sides of the trenches, leveling, dressing and ramming the bottom, and backfilling with approved material complete as per direction of the engineer-in-charge .i. in all sorts of soil excluding marshy soil & rocks (soft or hard) by manual means.a) upto 3 m depth(iv) without pumping out water and shoring (ii) cement concrete with 30 mm down graded shingles excluding shuttering.n.b. variety(a) 1:3:6 proportion providing and laying design mix concrete for plain / reinforced concrete work in any part of bridge (excluding bottom plugging) with coarse aggregates of appropriate nominal size and grading, fine aggregate (sand) conforming to proper grading zone, both of approved quality and cement, as necessary, including labour, cost and carriage of a