The original suwey and DPR is prepared by “Project Director JICA ODA loan project PWD Panaji Goa” and submitted to SIDCGL as contract package WW/14. The part of this package named as South Trunk Main Margao Sewer Networks (Part-A) and the same is allotted to MIS. Rockdrill Projects (P.) LTD., Jaipur Rajasthan, by work order no 6/SIDCGL/Accts F-10/1134/11-12 on 11-10-2011 by trenchless technology. The working surveys and GPR survey carried by MIS. Rockdrill Projects (P.) LTD., Jaipur Rajasthan, having the spot levels, longitudinal section of main trunk as well as for branch lines are attached here with. The day to day monitoring of survey work and checking of levels along with finalizing alignments is done by our experienced team. Considering the ground levels, longitudinal sections, bends/junctions and CD works, culverts etc. as well as the diameter of pipes in the tendered and other scope of work we redesigned the stretch of 3324 m long main trunk starting from Anuradha apartment having manhole no. MH 01 up to railway track opposite to Apolb hospital and found the velocity is within permissible limits i.e. 0.60 m/s to 3.5 m/s as CPHEEO manual Delhi. MIS. DRA Consultants Pvt. Ltd., Nagpur is consultant to SIDCGL for Project Management Consultant for work of South Trunk Main Margao Sewer Networks.