Rialto Pipeline Repair - Final Design and Construction


SCH Number
Lead Agency
Metropolitan Water District of Southern California
Document Title
Rialto Pipeline Repair - Final Design and Construction
Document Type
NOE - Notice of Exemption

Document Description
The Metropolitan Water District of Southern California recently conducted electromagnetic inspections, which revealed eleven 20-foot-long pipe sections with anomalous readings as to the integrity of the prestressing wires. The extent of the damage, if any, at these locations could not be interpreted by the electromagnetic inspections due to the presence of internal steel bands within the pipeline. The bands were installed in 1989, to minimize leakage from "broken back" cracks discovered within the pipeline. Cracks in "broken backs" expose these pipe sections to accelerated rates of corrosion and eventual leakage. The steel bands provide no structural support to prevent pipe rupture. All eleven pipe sections should be removed and replaced with welded steel pipe sections. The recommended repairs will occur in three phases in order to minimize the duration of pipeline shutdowns by taking advantage of other planned improvements to the Rialto Pipeline that will install three isolation structures. Metropolitan is proposing the preoperation of final design and construction of the Phase I repair of one segment of the pipeline.

Contact Information
William Fong
Metropolitan Water District of Southern California
P.O. Box 54153
Los Angeles, CA 90054

Phone : (213) 217-6899


San Bernardino

Notice of Exemption

Exempt Status
Statutory Exemption
Type, Section or Code
Section 21080.21
Reasons for Exemption
The proposed project involves the maintenance, repair, and restoration of an existing pipeline.

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 state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.

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