NEZAHUALCOYOTL YEAR 1996 Construction of the "Collector Vicente Villada, in City Nezahualcoyotl, Edo. of Mex. in a distance of 1,734.27 meters, built by tueleo method and pipe sunkof having reinforced of 213 cm. of diameter nóminal and of 254 cm of external diameter with mechanical shield excavating type, and light-shaft construction using az machiembrado profile, the period it was executed from september 1996 to May of 1997, this work was subcontracted through "Manufacturer Servicon, S.A of C.V"., for of Water and Reparation Commission, Mexico State. YEAR 1997 Construction of "Collector Vicente Villada", in Nezahualcoyotl City, mex. State. in a distance of 262.00 meters, built by tuneleo method and sunk pipe, having reinforced 183 cm. of nominal diameter by revolvable mechanic shield, and light construction using az machiembrado profile,it was executed from October to November 1997, this work it was subcontracted through " Servicon Manufacturer, CORP. of C.V"., for Water and Reparation Commission of Mexico State. YEAR 1998 Finish the collector Vicente Villada, in Cd. Nezahualcoyotl, Mexico State. for the installation of 710.00 meters of concrete reinforced pipe 83cm diameter,using sunk pipe method with hidromechanic push o and excavation with revolvable mechanic shield, and light-shaft construction using az machiembrado profile, executed from July 21th to september 30th 1998, works subcontracted for Tehimex, CORP. of C.V.

sewerage, shields, pipe, tunnels, microtunnels, sheet piling, tube, driving, openings, recondition, drainage, thrust, cofferdams, collector, drilling, excavation