Excavation in trenches with straight or open cutting in streets, lanes or in open areas for intramural sullage drains, intramural intercepting drains and outfall drains storm water channels and other work contingent or incident thereto, by mecanical means (JCB or Hydraulic excavator) including manually dressing of bed, trimming of sides and sides slopes to full dimensions and depth as shown on the drawings or as shall be required by Engineer-in-charge including dressing to correct sections and dimensions according to templates and levels, dewatering of rain water, diversion of traffic, providing and fixing and maintenance of caution boards, fencing, night signals, watching etc. subsequent refilling , watering and dressing upto ground level for lead upto 15 m and for all lifts including disposing surplus soils up to 15 metre complete in all respects. Depth upto 2.00 m. For Semi Conglomerate soil having gravel bolder above 40% up to 50%