Back in 2016, Celina, Texas, was slated to be D/FW’s next “boom town.” It has location, with population growth expected to grow from just over 10,000 to more than 34,000 by 2020. With an ever-growing population, Celina needed new water distribution and sanitary sewer collection systems. So they picked Pacheco Koch as their civil engineers. The wastewater interceptor is approximately 700 linear feet of 18-inch diameter, 21,800 linear feet of 21-inch diameter, 2,800 linear feet of 24-inch diameter and 4,300 linear feet of 27-inch diameter pipe, and includes an 11.2 MGD lift station. The water transmission main is approximately 1,200 linear feet of 12-inch diameter, 1,000 linear feet of 16-inch diameter, and 19,500 linear feet of 24-inch diameter pipe.
Due to an accelerated schedule, alignments and profiles for the interceptor were developed using LiDAR data for evaluation during conceptual design. The criteria for evaluation included no depths greater than 25 feet while eliminating all aerial crossings, minimizing the need for new easements, utilizing public rights-of-way, avoiding relocations for future planned street widening, and minimizing impacts to residents and trees. Construction methods included open-cut and tunneling to minimize pavement restoration.
For the water transmission main, similar criteria were utilized, resulting in the design of pipe vertical and horizontal curves to accommodate a future planned S-curve in the pavement alignment.
Other services provided for this project include public information, developer coordination, easement documents, land acquisition, geotechnical investigations, environmental clearances, wetland delineations, and cultural resource protections.