eHT provided project management, design and construction administration for transmission lines to carry treated water from the City of Missouri City’s (City) new surface water treatment plant (SWTP) to utility districts for distribution. Construction consisted of traditional open cut trench, as well as trenchless methods such as horizontal directional drilling, bore and jack and tunneling. There were several major obstacles along the path such as creek crossings, existing pipelines and a road and railroad crossing. The use of trenchless installation methods allowed the new transmission lines to be constructed without interrupting or damaging existing obstacles. To the south of the SWTP, 12,900 linear feet (LF) of 30-inch PVC line was constructed to reach Sienna Plantation Water Plant #1. Additionally, 6,680 LF of 10-inch PVC line was constructed along a parallel route. The pipeline functioned as an irrigation line to transport reuse water from the SWTP to the lake system in Sienna Plantation. To the north of the SWTP, 7,585 LF of 36-inch PVC line was constructed to a future Fort Bend Toll Road extension. From this location, the line was branched off for a future extension and then continued for another 3,615 LF as a 16-inch PVC line to reach Sienna Plantation Water Plant #2. A second line along this route consisted of 9,050 LF of 16-inch PVC line to the existing Well #5 in Sienna Plantation. The water from this well was used as a back-up supply source for the SWTP and could also be used as an aquifer storage and recovery line in the future. These transmission lines were adequately sized to allow for future extensions to the other utility district water plants in the area as the SWTP is expanded. Phase II of the project included expansion of the transmission system to Fort Bend County MUDs 46, 149 and 115/129. Transmission lines ranged in size from 8-inch to 36-inch.