Jonathan Rogers Water Treatment Plant
El Paso, Texas
The Jonathan W. Rogers Water Treatment Plant was designed by PSC in association with CH2MHill. This 40 MGD state-of-the-art facility has produced a high quality water since that time. The American Consulting Engineers Council recognized this project as the "Grand Award" winner and PSC later completed a 20 million gallon expansion project at the plant - providing state-of-the art controls integration engineering for the entire plant control system.
In 1998, the El Paso Water Utilities desired to expand the treatment plant to meet increasing demands from both the City of El Paso customers and the "colonia" areas surrounding the city. The utility again engaged the PSC/CH2MHill team to plan and execute the 20 MGD expansion to be certified by the Border Environmental Cooperation Commission (BECC) for potential funding by North American Development Bank (NAD Bank).
The first phase of the project involved preparing a preliminary engineering study, Environmental Assessment and a BECC Step II Form to obtain the BECC certification. This phase was executed successfully with the preliminary engineering, Environmental Assessment and the BECC certification procedure being completed in seven months.
PSC/CH2MHill was engaged to implement the design and construction phase work related to the project. This work involved preparing engineering design for the plant expansion. Treatment processes used include equalization storage, preozonation, coagulation, sedimentation, ozonation, granular activated carbon filtration and chlorination.
PSC designed and programmed the control system made up of 15 PLC's. PSC also programmed the HMI (SCADA interface) for this project.
Improvements to the pipelines delivery treated water to the distribution system were also designed by PSC.
As a part of the 20 million gallon expansion project at the Jonathan Rogers Water Treatment Plant in El Paso, PSC was retained to provide state-of-the art controls integration engineering for the entire plant control system. The new system as originally designed in 1998, is a system in which small, inexpensive PLCs are placed in the operational areas and the operating data are controlled by a central, PC based HMI package. The system, as required by the owner, was designed to have a single contract hardware/software vendor. The PLC and software vendor, Allen Bradley (AB), was selected in a competitive bid process as a part of moneys allocated solely for the instrumentation and controls upgrade.
The engineering task included programming plant system operations to run in automatic and manual modes, record alarm events, and maintain historical data on plant operations. The system also was designed to provide data for the Utility's public water quality reporting system. When completed, the plant will have 14 Remote Terminal Units (RTUs), which house the PlCs, terminal strips power supplies and all other communication components. The control database and HMI are located in the control room, in a primary "host" computer and secondary back-up computer.
The HMI is an animated graphical display and operations control tool for everything from the overall plant arrangement down to each individual device. An HMI screen includes several related devices grouped and displayed for a given operational area to provide all parameters used by the plant operator.
The RTUs have recently been installed for the existing plant. RTUs for the expansion project will be installed as construction is completed. PSC and EPWU personnel have worked together to ensure that the field devices are functioning properly and that all wiring is correct. The expansion portion will start-up in February 2002.
Awards:
Grand Award Winner - Engineering Excellence Awards
1995 American Consulting Engineers Council |
