Valencia Water Reclamation Plant Middle Section Retaining Wall Ground Improvement Project
4 Documents in Project
Summary
SCH Number
2023110644
Lead Agency
Los Angeles County Sanitation District
Document Title
Valencia Water Reclamation Plant Middle Section Retaining Wall Ground Improvement Project
Document Type
NOD - Notice of Determination
Received
Posted
6/18/2025
Document Description
The Valencia Water Reclamation Plant (VWRP) is one of two water reclamation plants owned by the Santa Clarita Valley Sanitation District (SCVSD) and serves the City of Santa Clarita and a portion of unincorporated Los Angeles County. Continuous operations of the VWRP are critical for the ability of the SCVSD to provide essential services to its customers. Recent studies identified that scour of the Santa Clara River under a Capital Flood and a design-level earthquake may erode approximately 1,000 feet of the middle section of the existing retaining wall and along the VWRP boundary to the point that facilities of the VWRP may be damaged or destroyed. The proposed project would reinforce the existing middle section retaining wall along the southwestern side of the VWRP by constructing an underground retaining wall to protect against river scour and seismic activity, upgrade two existing outfall structures, and add riprap along the southern portion of the VWRP wall. The proposed project would also include clearance of vegetation around the existing VWRP outfall structures for long-term maintenance of the outfall structures. Temporary construction work would occur along the VWRP boundary as well as an existing Significant Ecological Area (SEA) and California Department of Fish and Wildlife conservation easement west of the VWRP. The proposed project would impact approximately 3.26 acres just outside of the VWRP. The proposed project would not require any road closures during construction and no new permanent lighting would be required for the proposed new structures.
Contact Information
Name
Mandy Huffman
Agency Name
Los Angeles County Sanitation Districts--Santa Clarita Valley Sanitation District
Job Title
Environmental Planner
Contact Types
Lead/Public Agency
Phone
Email
Location
Coordinates
Counties
Los Angeles
Regions
Southern California, Unincorporated
Cross Streets
28185 The Old Road / Rye Canyon Road
Zip
91355
Total Acres
3.26
Parcel #
2826-005-902
State Highways
I-5, SR-126
Schools
Oak Hills Elementary, Rancho Pico Junior High School
Waterways
Santa Clara River
Township
4N
Range
16W
Section
00
Notice of Determination
Approving Agency
Santa Clarita Valley Sanitation District
Approving Agency Role
Lead Agency
Approved On
County Clerk
Los Angeles
Final Environmental Document Available at
City of Santa Clarita Valencia Branch Library: 23743 West Valencia Boulevard, Santa Clarita, CA 91355
and the Los Angeles County Sanitation District's Joint Administration Office: 1955 Workman Mill Road,
Whittier, California 90601
Determinations
(1) The project will have a significant impact on the environment
No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
Yes
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
No
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
Yes
(4) A mitigation reporting or monitoring plan was adopted for this project
Yes
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
Yes
Attachments
Notice of Determination
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