Treatment

Northeast Water Purification Plant Expansion Houston, Texas DCCM partnered with the Houston Waterworks Team to perform a progressive design-build project to expand the existing City of Houston Northeast Water Purification Plant from 80 million gallons per day to 400 million gallons per day treatment capacity. DCCM was responsible for the structural and mechanical design of the new raw water intake pump station, located 1,000 feet offshore in the middle of Lake Houston. It has an access bridge and pump station platform with ten 1,000-horsepower vertical turbine pumps capable of delivering up to 560 million gallons per day (ultimate capacity) of raw water from Lake Houston to the Northeast Water Purification Plant. DCCM performed structural design modeling and simulation of a 30,000-square-foot pump station platform that supported the pump facility building, pump equipment, piping and electrical switchgears, and process mechanical design to install ten 1,000-horsepower vertical turbine pumps with two 96-inch header pipes, control valves, and a 25-ton bridge crane. The intake pump station platform is 13 feet above normal water level and 250 feet long by 120 feet wide, supported on a cast-in-place 1-foot-thick concrete deck with 3.5-foot-deep grade beams. DCCM designed and analyzed the intake pump station using the finite element program Structural Analysis and Designing Program. Dynamic analyses were also performed to verify the platform’s dynamic behavior under pump dynamic loads during operation. Bentley 3D models were used in the final design by structural, architectural, process mechanical, piping, plumbing, instrumentation, and electrical design disciplines. All design models were integrated to detect conflicts and complete the final product. At a Glance 400 million Gallons per Day $165 million Construction Cost Markets Municipal Services Water & Wastewater Utilities

69th Street Wastewater Treatment Plant, Packages 5 and 6 Houston, Texas Package 5: DCCM completed field investigation and final design services to replace the existing 69th Street wastewater treatment process instrumentation and controls for the entire wastewater facility. Work included the replacement of flow meters, analyzers, pressure and level instruments, pneumatic and electrical control valves, electrical conduits, and control panels for the lift station, headworks, flow distribution controls, oxygen reactors, clarifiers, return activated sludge and waste activated sludge pump stations, sludge thickeners, and an odor control system. Package 6: DCCM provided a preliminary engineering study, including filter pilot testing and evaluation of new tertiary filter technology to replace the existing sand filters at the 69th Street WWTP. DCCM worked with the City of Houston to procure a new filter system. The final design included modifying the existing treatment facility infrastructure and adjusting the hydraulic profile to fit the new filter system, a new electrical system with instrumentation, and control systems. The existing sand filter system was demolished and replaced with a Kruger disc filter system. The new disc filter system is rated for an average of 220 million gallons per day and a peak flow of 440 million gallons per day, making it Texas’s largest tertiary filter system installation. At a Glance 440 million Gallons Per Day $25.4 million Construction Cost Markets Municipal Services Water & Wastewater