Water/Wastewater Treatment and Conveyance


Over the last 25-years, DRC has designed new or improved water and wastewater facilities up to 700 mgd. We have provided design, engineering and other support services for the City of Los Angeles; Environmental Engineering Division since 1986. For the last 15-years, DRC has been awarded three consecutive 5-year prime contracts due to excellent work and consistent delivery on time and within budget. The experience of our engineers provides a unique project focus and technical excellence to our clients for the design and construction management of water and wastewater facilities including large and small diameter conveyance and interceptor sewer systems.


DRC is consistently at the forefront of innovation, state-of-the-art concepts and design for water and wastewater facilities. The variety of specialized water and wastewater engineering services we provide to our clients include the design of advanced and secondary treatment, land and grey water reuse systems, bio-solids management facilities and beneficial re-use systems.

Our services have included instrumentation, process control, electrical, mechanical and civil design, start-up and commissioning, operations planning, facility testing, construction management.


This experience includes the design of the following treatment components:

  • Headworks facility design including influent screening, grit removal and pumping.
  • Primary clarification
  • Full Secondary treatment
  • Land discharge systems
  • Bio-solids management facilities employing aerobic and anaerobic digestion
  • Bio-solids pumping, thickening, digestion, dewatering, and beneficial reuse
  • Digester gas reuse
  • Odor control facilities
  • Standard Operating Procedures and O&M Development
  • Maintenance of Plant Operations
  • Water/Wastewater Treatment
  • Collection, Distribution and Pumping
  • Water Storage, recycling and re-use
  • Water Resources, Watershed and Stormwater Management
  • Flood Control, Planning and Design
  • Municipal
  • Energy
  • Dams and Reservoirs
  • Water Resources
  • Wastewater Treatment and Collection
  • Tunnel and Pipeline Design
  • Construction Management Services
  • Design and Planning
  • Water Quality