HIRING THE SERVICES OF DESIGN, DETAIL ENGINEERING & INSTALLATION OF 355.6 MM OD PIPELINE BY HORIZONTAL DIRECTIONAL DRILLING METHOD AT KOSHI RIVER CROSSINGS INCLUDING LAYING OF APPROXIMATELY 1320 M OF 355.6 MM OD PIPELINE & HOOK-UPS WITH EXISTING CRUDE OIL PIPELINE. AND ALSO LAYING OF 40 MM DIA HDPE DUCT ENCAGED IN 75MM NB MS PIPE ACROSS RIVER KOSHI OF LENGTH 1320 M ALONG WITH CRUDE OIL LINE UNDER PLM SECTION, PS-8, SONAPUR, WB
