Mission Trails to Lake Murray Pipeline Relining

Background
In October 2008, Pipeline 4 failed in a fairly remote section of Mission Trails Regional Park, near the San Diego River. After the failure, the Water Authority performed forensic analysis on the pipe and determined that a short section of the pipe needed to be urgently relined with steel. Subsequently, from mid-February through mid-March 2009, the Water Authority relined approximately 1,200 feet of Pipeline 4 north and south of the San Diego River.

This relining project will reline the sections of Pipeline 4 that were not urgently relined. Generally, relining construction rehabilitates segments of pipelines based on their age and the need for improvements. The Mission Trails to Lake Murray Relining Project involves rehabilitating approximately 3 miles of Pipeline 4 beginning immediately south of State Route 52 in Mission Trails Regional Park east of the community of Tierrasanta and continues south to Lake Murray in the community of San Carlos. It also involves rehabilitating approximately a half-mile portion of Pipeline 3 along Lake Shore Drive, south of Jackson Drive, in the community of San Carlos and city of La Mesa.

The construction crews will conduct most of the work underground, inside the pipe, by establishing and entering the pipeline in 11 various sites or portals. Large wooden sound walls will be temporarily placed at portals, as needed, to adhere to environmental regulations and ease noise impacts to residents.

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*All dates are approximate and subject to change.

Completed Milestones

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Portal Map
(View Larger)

Pipeline relining is conducted in several phases; using portals developed by removing 40-feet of existing pipe to gain access to the interior of the pipeline and to install relining materials. These 11 construction portals remain exposed but are gated and secured during construction. Not all portals are active at the same time, however. Work shifts from one portal to another depending on which phase is under way. The contractors usually work in a north to south pattern.

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Fact Sheet:
Coming Soon
 

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Meeting Summaries:
Coming Soon

Community Presentations
The Water Authority is committed to keeping all community groups and organizations in the project area informed about the project. Water Authority staff has made and will continue to make periodic project update presentations to the following organizations and groups:

• San Carlos Area Council 
• Tierrasanta Community Council
• Mission Trails Regional Park Citizens Advisory Committee
• Mission Trails Regional Park Task Force
• Navajo Community Planners, Inc.
• Belsera Homeowners Association
• Woodland Hills Condominium Association
• San Diego Mountain Biking Association

If your group or organization would like a project update presentation, please contact us at (877) 682-9283, Ext. 7004 or e-mail us at CIPinfo@sdcwa.org . Please include your organization’s name and contact information as well as date/time of presentation requested.

Meeting Summaries:
Coming Soon

Information Updates:
Coming Soon

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Click here to view the report and other environmental documents for this project.

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For more information, please call the 24-hour toll-free project information line at (877) 682-9283, ext. 7005 or email CIPinfo@sdcwa.org. A representative from the project team will return your inquiry within one business day.

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