Las Flores Enhanced Water Reliability Project Initial Study/Mitigated Negative Declaration

2 Documents in Project


SCH Number
Lead Agency
Santa Margarita Water District
Document Title
Las Flores Enhanced Water Reliability Project Initial Study/Mitigated Negative Declaration
Document Type
MND - Mitigated Negative Declaration
Project Applicant
Santa Margarita Water District
Present Land Use
General Plan Designation: Las Flores Planned Community; Zoning: Las Flores Planned Community – Open Space and Residential

Document Description
The project includes installation of approximately 3,800 linear feet of 16-inch pipe and 6,390 linear feet of 8-inch pipe in residential streets and easements through previously disturbed open space. The project also involves the conversion of the Las Flores Lift Station, currently out of service, to a recycled water booster pump station, and the rehabilitation of an approximately 3,650-foot-long 10-inch existing force main in the ROW within Antonio Parkway. Rehabilitation of the 10-inch force main would be performed using a trenchless rehabilitation method where a liner would be inserted within the existing forcemain for structural reinforcement. Two access points at existing manholes within Antonio Parkway are necessary for proper installation of the liner. Upon completion, the project would permanently convert a total of 209 AFY of irrigation demand from potable to recycled water.

Contact Information
Karla Houlihan
Santa Margarita Water District
26111 Antonio Pkwy
Rancho Santa Margarita, CA 92688

Phone : (949) 459-6581


33°35'1.334"N 117°37'50.408"W
Las Flores
Cross Streets
Oso Pkwy/Meandering Trail/Antonio Pkwy
Total Acres
Parcel #
State Highways
I-5, SR-241, SR-73
Las Flores Elementary School, Las Flores Middle School
Other Information
Sections 5 and 8 / 4 and 9

Notice of Completion

Review Period Start
Review Period End
Development Type
Water Facilities (2.6 miles of recycled water pipeline)(PL Type)
Local Action
Site Plan
Project Issues
Aesthetic/Visual Agricultural Land Air Quality Archaeologic-Historic Biological Resources Drainage/Absorption Economics/Jobs Flood Plain/Flooding Forest Land/Fire Hazard Geologic/Seismic Minerals Noise Population/Housing Balance Public Services Recreation/Parks Schools/Universities Septic System Sewer Capacity Soil Erosion/Compaction/Grading Solid Waste Toxic/Hazardous Traffic/Circulation Vegetation Water Quality Water Supply Wetland/Riparian Growth Inducing Land Use Cumulative Effects
Reviewing Agencies
California Air Resources Board California Department of Conservation California Department of Fish and Wildlife, South Coast Region 5 California Department of Forestry and Fire Protection California Department of Parks and Recreation California Department of Transportation, District 12 California Department of Water Resources California Governor's Office of Emergency Services California Highway Patrol California Native American Heritage Commission California Natural Resources Agency California Regional Water Quality Control Board, San Diego Region 9 California State Lands Commission Colorado River Board Department of Toxic Substances Control Office of Historic Preservation State Water Resources Control Board, Division of Drinking Water State Water Resources Control Board, Division of Drinking Water, District 8 State Water Resources Control Board, Division of Water Rights State Water Resources Control Board, Divison of Financial Assistance


Environmental Document
0 SMWD Las Flores NOI   PDF 2208 K 1 SMWD Las Flores ISMND   PDF 6239 K 2 SMWD Las Flores Appendices   PDF 10252 K 4 SMWD Las Flores Summary Form   PDF 580 K
3 SWMD Las Flores NOC   PDF 193 K

Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, 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. For more information, please visit OPR’s Accessibility Site.

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