Robert M. Diemer Treatment Plant Improvements Project

5 Documents in Project


SCH Number
Lead Agency
Metropolitan Water District of Southern California
Document Title
Robert M. Diemer Treatment Plant Improvements Project
Document Type
SIR - Supplemental EIR
Present Land Use
Public Facility
Document Description
The Metropolitan Water District of Southern California is proposing a number of projects at the Robert B. Diemer Water Treatment Plant to provide additional service life to the plant; ensure reliable drinking water to southern California through plant improvements and proper maintenance; improve the efficiency and effectiveness of the plant to meet increasingly stringent water quality requirements and improve the structural safety of the plant.

Contact Information

Ms. Dierdre West
Agency Name
Metropolitan Water District of Southern California
Contact Types
Lead/Public Agency


Yorba Linda
Cross Streets
Valley View Avenue and Imperial Highway
Total Acres
State Highways
91 and 57
Telegraph Creek, Carbon Canyon Creek

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Department of Health Care Services (DHCS), California Department of Parks and Recreation, California Department of Transportation, District 12 (DOT), California Highway Patrol, California Native American Heritage Commission (NAHC), California Public Utilities Commission (CPUC), California Regional Water Quality Control Board, Santa Ana Region 8 (RWQCB), Department of Water Resources, Resources Agency, State Water Resources Control Board, Division of Water Quality, State Water Resources Control Board, Divison of Financial Assistance
Development Types
Water Facilities (Type Water Filtration, MGD 520)
Project Issues
Aesthetics, Air Quality, Cultural Resources, Cumulative Effects, Drainage/Absorption, Geology/Soils, Growth Inducement, Hazards & Hazardous Materials, Hydrology/Water Quality, Noise, Public Services, Recreation, Sewer Capacity, Solid Waste, Transportation, Vegetation, Wetland/Riparian, Wildlife

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613.

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