Emergency Pipe Procurement and Storage (18" through 78")

2012 Project of the Year Award from American Public Works Association (APWA) - Emergency Construction Category - Ventura County

• Owner: Calleguas Municipal Water District
• Cost: $6,300,000

Calleguas Municipal Water District provides potable water to more than 600,000 residents and meets roughly 70 percent of municipal and industrial water demands of Ventura County, California through its retail purveyors, such as cities and special water districts.

Since its establishment in early 1960s, Calleguas Municipal Water District has constructed 140 miles of 14-inch to 78-inch pipelines using variety of materials. Most of these pipelines are custom fabricated to meet specific needs of the system operation and Calleguas requirements. The pipelines do fail periodically and without advance notice because of earthquakes, damage by others during construction, and age of pipeline. Repair work of this variety of pipelines, including WSP, Pre-stressed, and Concrete with Bar Wrapped Steel Cylinder, has been a challenge and rather costly due to required time to procure material, custom fabrication, and system downtime (loss of service).

To ensure that emergency pipe repair work is completed within shorter time and economically, Calleguas Municipal Water District determined to procure pipes that match with all existing pipelines and store them for future use to perform emergency repair work.

Perliter & Ingalsbe was brought on board to provide engineering services including developing inventory of existing and required new pipes, detail design, preparation of drawings and specifications, and construction support services.

Major Components and Special Features:

• Determine required diameter and length of new pipes and fittings to be used for emergency repair work.
• Reduce required new pipe inventory by developing innovative methods of using new pipes and fittings that can be used for replacing multiple existing pipes of different types and diameters. Approximately $3M+ savings was realized through implementation of innovative solutions.
• Approximately 3,600 feet of pipes and fittings with different physical features were designed and procured.

• Determine required other materials for repair work, such as liners, filler plates, manholes, buttstraps, and filler rods.
• Develop methodologies of long-term storage of pipes to ensure their integrity and quality. Steel pipes and fittings with mortar coating and lining were stored belowground. Steel pipes and fittings with epoxy coating and lining were stored above ground.
• Develop emergency repair work details and manual.