Irvine Ranch Water District San Diego Creek Watershed Natural Treatment System (NTS)

10 Documents in Project


SCH Number
Lead Agency
Irvine Ranch Water District
Document Title
Irvine Ranch Water District San Diego Creek Watershed Natural Treatment System (NTS)
Document Type
NOP - Notice of Preparation

Document Description
The proposed program that will be evaluated in the Program EIR is the San Diego Creek Watershed Natural Treatment System Program (NTS Program) which has been prepared by IRWD. The Program includes a Master Plan which is being developed to describe the watershed-wide system for the natural treatment of low-flow and initial storm runoff generated within the San Diego Creek Watershed. The proposed NTS Program consists of constructed water quality treatment wetlands and natural biofilters. These take advantage of naturally occurring physical, chemical, and biological resources to treat the runoff. The natural and man-made drainage features within the watershed all drain via San Diego Creek and its tributaries into Upper Newport Bay. These flows then enter Lower Newport Bay on their way to the Pacific Ocean.

Contact Information
Norris Brandt
Irvine Ranch Water District
Lead/Public Agency
P.O. Box 57000
Irvine, CA 92219-7000

Phone : (949) 453-5300


Irvine Irvine, Tustin, Lake Forest, Laguna Hills, Laguna Woods, ... Laguna Hills Laguna Woods Lake Forest Newport Beach Orange Santa Ana Tustin
Fourteen or more creeks, channels and tributaries

Notice of Completion

Review Period Start
Review Period End
Local Action
Master Plan
Project Issues
Aesthetics Agriculture and Forestry Resources Hazards & Hazardous Materials Hydrology/Water Quality Noise Public safety, Utilities
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 State Lands Commission (SLC) Department of Water Resources Resources Agency California Native American Heritage Commission (NAHC) California Regional Water Quality Control Board, Santa Ana Region 8 (RWQCB) California Department of Transportation, District 12 (DOT)

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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