Perris Basin Desalination Design Project, Perris Desalter II Test Wells, Eastern Municipal Water District (EMWD) Property or Easement, City of Perris, Riverside County, California



U.S. Army Corps of Engineers Los Angeles District



Project Management, Geotechnical Engineering, Hydrology, Hydrogeology, Geology, Scheduling


DRC’s modified the original services for installing four new test wells for the Eastern Municipal Water District’s (EMWD) Perris Basin Desalination Program in the City of Perris, Riverside County, California. The project required an analysis of formation samples, sieve analyses of drill cuttings, and an analysis of the downhole geophysical logs after drilling commenced. The analysis determined the depth of the well to be 390 feet. DRC conducted field investigations and developed and installed two new test wells. This included drilling; preparing downhole geophysical and caliper logs; and well construction, development, testing, alignment surveys, color video, disinfection, and a pump foundation. The method for drilling and completing the new test wells at all water-bearing zones produced acceptable properties and water quality identified by EMWD. The work included reaming, installing blank and louvered well castings, installing gravel pack, and well development. DRC monitored the project, created the work plan, and a project schedule. DRC completed the welding of the steel plate over the top of the well casing, the tubing, and the annular space between the well casing and conductor casing to protect the wells from vandalism. The final well designs and decision to complete each test well were contingent upon an examination of the formation samples, sieve analyses of drill cuttings, and downhole geophysical logs that were collected and completed during drilling of the pilot borehole. The operational capacity of the new test wells is 300 to 1,000 gallons per minute.