Environmental compliance and natural resource management

Water, Wastewater, Flood Control and Solid Waste

HELIX Environmental Solid Waste, Water and Wastewater Projects
Water and Wastewater Projects
Otay Water Treatment Plant Upgrade Project
  • Vista Irrigation District Potable Water and Water Reclamation Master Plans EIR to address the master plans on a program level;and four reservoirs, two pump stations, a pressure reducing station and associated pipelines on a project level (San Diego County, CA)
  • Valley Center Sewer and Water Reclamation Project EIR for construction of a sewage treatment center and reclaimed water reservoirs in Valley Center (San Diego County, CA)
  • San Diego County Water Authority Treatment Plant Project EIR for 100-MGD water treatment plant on 34.7 acres in Twin Oaks Valley (San Diego County, CA)
  • Otay Water Treatment Plant Upgrade Project IS/MND, BTR, Landscape Concept Plan, and MM for construction of two tank reservoirs and a membrane facility (San Diego, CA)
  • Palo Verde Irrigation District Land Management, Crop Rotation and Water Supply Program EIR for plan to reduce Colorado River water use in the Palo Verde Valley by temporarily following farmland, thereby making an equal amount of “saved” water available for use in coastal Southern California communities (Imperial County, CA)
  • Otay Mesa Trunk Sewer Master Plan Update and Alignment Project Biological surveys and constraints analysis for sewer master planning in western Otay Mesa (San Diego, CA)
  • Carmel Valley Trunk Sewer BTR, Conceptual Wetland Mitigation Plan and MM for replacement of 2.5 miles of a major trunk sewer in McGonigle Canyon and Carmel Valley (San Diego, CA)
  • Pipeline Nos. 3 and 4 Relining Project Environmental Compliance Monitoring, BTRs, NTRs, and MNDs for the relining of eight segments/64 miles of San Diego Aqueduct pipelines (San Diego County, CA)
  • Murrieta Recycled Water Facilities Project IS/FONSI and MND/EA for construction of 25,000 linear feet of reclaimed water pipeline (Riverside County, CA)
  • Hemet/San Jacinto Integrated Recharge and Recovery Project EIR, EIS, BTR and Permitting for 35 acres of groundwater recharge basins, 7.7 miles of pipeline, two pump stations, and associated facilities/upgrades in the San Jacinto River (Riverside County, CA)
  • Hemet/San Jacinto Water Management Plan Supplemental EIR to the Hemet/San Jacinto Integrated Recharge and Recovery Program EIR (Riverside County, CA)
  • EM-20 Transmission Main and Turnout Project EIR, JD, BM and Permitting for construction of a water main from the Lake Skinner Filtration Plant to Pipeline No. 3 (Riverside County, CA)
  • Pipeline No. 3 Bypass Project EIR, AA and BTR for alternative pipeline alignments (Riverside County, CA)
  • Unit G Parallel Pipeline-Denk Reservoir Inlet/Outlet Project EIR, EA, HRP, MM and Permitting for 2.4-mile potable water pipeline (San Diego County, CA)
  • 4S Ranch Pipeline North Project IS/MND, BTR, MMRP and Permitting for 1.0-mile alignment of a potable water pipeline (San Diego County, CA)
  • Unit S-3 Pipeline Project IS/MND and MMRP for 1,500-foot potable water pipeline in Rancho Santa Fe (San Diego County, CA)
  • Coachella Canal Lining Project Flat-tailed lizard and desert tortoise surveys for 33.4-mile canal lining project (Imperial and Riverside Counties)
  • Gano Reservoir Project (711-3 and 711-4 Reservoirs) IS/MND and MM for the construction of two earthen embankment type (basin) reservoirs with floating covers and associated pipeline segments, each with a capacity of eight million gallons of potable water (San Diego County, CA)
  • Northwest Quadrant Recycled Water Pipelines Project IS/MND for approximately five miles of pipeline in the northwest section of Olivenhain Municipal Water District’s service area (San Diego County, CA)
  • Unit Y Parallel Pipeline Project IS/MND, Cultural Resources Report and BTR for construction of approximately 1,000-foot-long potable water pipeline in Santa Fe Valley (San Diego County, CA)
  • San Bernardino Water Transmission Main Project IS/MND and Acoustical Study for approximately 8,400 linear feet of pipeline through the Cities of San Bernardino, Colton and Grand Terrace (Riverside County, CA)
  • San Vicente Pipeline Project
  • San Vicente Pipeline Project Environmental Compliance and Construction Monitoring for pipeline component of San Diego County Water Authority’s Emergency Storage Project (San Diego County, CA)
  • Raub Water Treatment Facility Project Conceptual landscape planting and irrigation plans for a water treatment facility in San Bernardino; designed to improve appearance and use-ability of streetscape bordering the facility and improve equipment access for the City of Riverside Water and Utilities Department (Riverside/San Bernardino, CA)
  • Live Stream Discharge Project Permitting to allow the Otay Water District to discharge recycled water into Salt Creek (San Diego County, CA)
  • Master Storm Water System Maintenance Program Program EIR, NTR, BTR, comprehensive wetland mitigation strategy, and permitting for long-range plan to guide the maintenance of approximately 50 miles of stormwater channels and associated facilities (San Diego, CA)
Solid Waste Projects
  • Gregory Canyon Landfill Project EIR, BTR, Wetland Delineation, and Permitting for a solid waste facility along one-mile of the San Luis Rey River near Pala (San Diego County, CA)
  • Iron Mountain Landfill Closure Project IS/MND addressing closure of a Metropolitan Water District of Southern California landfill (San Bernadino County, CA)

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