Joint Transmission Main (JTM) Valve Replacement Project

2 Documents in Project


SCH Number
Lead Agency
South Coast Water District
Document Title
Joint Transmission Main (JTM) Valve Replacement Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use

Document Description
The South Coast water District (District) is the contract operator for a large water main known as the Joint Transportation Main (JTM). The District proposes the replacement of a 42-inch, 30-inch, 24-inch and 8-inch isolation valves along the 60-inch JTM and a 24-inch Eastern Transmission Main (ETM) located in the City of Laguna Woods. These valves and flow meter have not been operated in several decades and have become inoperable. The valves associated with the JTM will require repair and replacement. The valve vaults will be raised to grade for future safe access and maintenance. Due to the size, depth, and location of the vaults, the construciton activities will require large excavations and removal of some trees and other vegetation to provide contractor access.

Contact Information
Marissa Potter
South Coast Water District
Lead/Public Agency
31592 West Street
Laguna Beach, CA 92651

Phone : (714) 499-4555


Laguna Woods
Cross Streets
Rondo Sevilla X Avenida Sevilla
Aliso Creek

Notice of Completion

Review Period Start
Review Period End
Development Type
Other (water pipeline valve & valve repair)
Local Action
Water pipeline
Project Issues
Aesthetics Air Quality Biological Resources Hydrology/Water Quality Vegetation Wetland/Riparian
Reviewing Agencies
California Air Resources Board (ARB) California Department of Fish and Wildlife, South Coast Region 5 (CDFW) California Department of Parks and Recreation California Highway Patrol California Native American Heritage Commission (NAHC) California Regional Water Quality Control Board, Santa Ana Region 8 (RWQCB) Department of Water Resources Office of Emergency Services, California Resources Agency Resources, Recycling and Recovery State Water Resources Control Board, Divison of Financial Assistance Cal Fire 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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