Sustainable Land Development Today - January 2009 - (Page 26)

By Judy Horning Industry Spotlight for this multi-phased, developer-driven project. Conco-West, Inc., Manteca, California, provides services for the project as general contractor and DYK Incorporated, El Cajon, California, provides structural engineering and building and prestressing of the storage tanks. cal post-tensioning is achieved with 120, 1.25-inch diameter, vertical threadbars. Circumferential prestressing is completed with seven-wire galvanized strand and protected with several coats of automatically applied shotcrete. DYK’s prestressing and shotcreting machine continuously and electronically monitors the applied stressing force on the stand as it is applied. Water Demand Develops in the Heart of Northern California Rising up from the agricultural fields of the San Joaquin Valley is Northern California’s newest city. Mountain House is an unincorporated, planned development with a vision of being a sustainable and self-sufficient community. As the largest planned development in San Joaquin County in many years, Mountain House is projected to provide 15,600 homes in 12 neighborhoods developed by three of the nation’s most esteemed homebuilders. Development will span more than 20 years and population is expected to expand to nearly 44,000 residents from its current population of approximately 6,000. Experts Tackle Project Challenges The project poses some challenges for the management team, given the tanks‘ close proximity to housing and the mandate to preserve the natural beauty of the permanent open spaces for recreation. In order to reduce the visual impact of the facility, the twin tanks are Westside Booster Pump Station and twin 3.7 million- designed to be partially buried to blend into the hillside and screened using cregallon potable water storage tanks. ative landscaping. The condition of the existing soil presents another challenge for the project team. The poor soil stabiTwin Potable Water Storage lization is improved and reinforced with Tanks the inclusion of dense aggregate piers. Prestressed concrete was selected be- The cost-effective solution of using cause it offers the highest quality, longest Geopiers as reinforcement eliminates the lasting and lowest maintenance water need for more costly deep foundations storage structures for the twin tanks. The and floor slab alternatives. floors, footings, columns, walls and roofs With the development of a masterare all designed and constructed with planned community and increased popconcrete. Each tank has an inside diame- ulation in Mountain House, the ter of 150 feet and a wall height of 32 feet. completion of the Westside Booster All construction joints incorporate PVC Pump Station and the twin potable, waterstops to ensure a watertight struc- water-storage tanks reflect a vital contriture. A nine inches thick, cast-in-place, bution to the well being of the commuflat concrete roof is supported by 32 con- nity by providing an important and crete columns, each 24 inches in diame- reliable source of water to accommodate ter. The 10 inches thick walls of the tanks both recent and future growth. SLDT are both circumferentially and vertically Photos by Cal Aerial Imaging, Sacramento, CA. prestressed by DYK Incorporated. Verti- Developing Water Demand With the influx of residents, businesses, and industrial users, the Mountain House Community Services District (MHCSD), the government agency of Mountain House, established water improvements which are completed or nearing completion at this time. Using the latest technology, MHCSD treats water provided by Byron-Bethany Irrigation District and delivers clean, safe water to its users. As part of the community’s master water plan and fundamental to this residential development is the inclusion of the Westside Booster Pump Station and twin 3.7 million-gallon potable water storage tanks. The two tanks and pump station are essential since they provide potable and emergency water storage serving both the planned residential development and the Delta Community College. Pacific Advanced Civil Engineering, Inc., Fountain Valley, California, provides MHCSD and the developers of Mountain House with design services 26 January 2009 Sustainable Land Development Today

Table of Contents Feed for the Digital Edition of Sustainable Land Development Today - January 2009

Sustainable Land Development Today - January 2009 Contents Our Voice Your Voice The BottomLine SLDI in Focus Calendar Industry Rebound Will Require Balanced Approach What Happened to Fannie and Freddie? Added Value in Entitlements Industry Spotlights Technology Wastewater Innovation Classifieds Advertiser Index Editorial Board SLDT Resources Last Word

Sustainable Land Development Today - January 2009

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