Mt. San Antonio College, Central Plant Expansion & TES Tank

  • Location

    Walnut, CA
  • Project Dates

    March 2015 - October 2016
  • Construction Cost

    $10 million
  • Size

    20,000 ton-hours of chilled water storage; 2000-tons chiller capacity; 2400-GPM chilled water delivery
  • Delivery Method

    Design-Bid-Build (For Central Plant Expansion); Design-Build for TES tank
  • Market

    Community Colleges
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  • Thermal energy storage and central plant upgrades reduce campus energy demands

  • Project Overview

    Mt. San Antonio College wished to modify the delivery method of a central plant expansion and thermal energy storage tank (TES) project. The college wanted to procure the TES tank through a Design-Build method, while the central plant and new chilled water piping used traditional Design-Bid-Build documents with both portions of the project under Lease-Lease Back procurement and delivery method. We assisted Mt. SAC by updating the TES RFP and technical documents to reflect its status as a design-build project. Our team then prepared construction documents for the central plant expansion and new chilled water piping to the TES tank and to an upcoming athletics complex.

  • Solution

    The 20,000 ton-hour concrete TES tank is located underground, in a parking lot located north of the central plant. We designed the demolition and restoration plans for the tank site, including the parking lot, walkways, landscaping, site lighting and tree protection. For the central plant expansion, our team provided MEP design for: a fourth electric centrifugal water chiller; two cooling tower cells in the cooling tower yard; a third chilled water pump for site water distribution; two new chilled water pumps to support the TES tank; one condenser water pump; and new controls and interconnecting direct-buried chilled water lines between the TES tank and central plant. We also designed new pipe work to complete equipment installation, a new section of chilled water lines to connect to a future athletics complex and configured a new sequence of operations to integrate the TES tank, and new equipment with the central plant.