Emergency Power Requirement Study:

• Owner: Walnut Valley Water District
• Cost: Estimated Cost of Proposed Improvements: $5,000,000

Walnut Valley Water District (WVWD) is located 20 miles east of Los Angeles in the San Gabriel Valley, encompassing an area of approximately 28 square miles serving approximately 100,000 multi-use consumers in six communities. The District's present service area includes all of the city of Diamond Bar, portions of the cities of Industry, Pomona, Walnut and West Covina, and the easterly section of the unincorporated area of Rowland Heights.

The District is 100% dependent upon an imported potable water supply obtained almost entirely from the Metropolitan Water District of Southern California (MWD). The District's potable water distribution system consists of approximately 377 miles of pipelines, 28 reservoirs, 16 pump plants, and 37 pressure regulating stations, serving water to approximately 26,500 connections in 14 pressure zones.

In effort to provide reliable and continuous water supply during major electrical power outage, the District engaged Perliter & Ingalsbe to perform a study to determine requirements of emergency power equipment throughout the District.

Major Components and Special Features:

• Existing system review, which included:
• Fourteen pressure zones
• Water demands
• Reservoirs
• Pump stations and their loads, characteristics
• Analyses, including:
• Available water supply from reservoirs
• Pump stations locations, physical characteristics, importance to water supply, and electrical load
• SCE power supply and its reliability

Scope of Work:

• Recommend equipment for providing emergency power throughout the District service area (Total seven diesel generators with different capacities and features were recommended)
• Determine type of required diesel generator, such as, portable, dedicated portable, or stationary
• Determine sizes and locations of diesel generators
• Determine other required/recommended improvements at pump stations
• Determine construction cost
• Determine priority of construction
• Prepare comprehensive report