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HSI performed a hydrogeologic investigation of the proposed site and implemented a conceptual plan for utilizing vadose zone recharge well technology for recharging high quality reclaimed water. HSI designed and oversaw the construction of 27 state-of-the-art vadose zone recharge wells and 28 emergency low-tech vadose zone recharge wells. After their construction, HSI tested the vadose zone recharge wells and developed an operator’s training manual. |
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An aerial view of the Scottsdale Water Campus. |
Vadose Zone Recharge Wells |
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HSI developed a task based approach to facilitate the hydrogeologic site evaluation, feasibility of recharge, recharge method, permit acquisition, and construction of a 100,000 acre-feet recharge facility to store Central Arizona Project water. This facility incorporates state-of-the-art basin/vadose zone well design and automated data collection and operation through the use of satellite communications. This is the largest privately funded Water Banking Facility in Arizona. For more background on this project, read our articles that were published in Southwest Hydrology. |
Basin Recharge |
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Groundwater Recharge |
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In 1999 Fountain Hills Sanitary District (FHSD) and HSI undertook the development of a pilot scale artificial groundwater storage facility. HSI evaluated the recharge capability beneath Fountain Hills through the construction of deep soil borings and hydrotesting. Ultimately, as part of the Full Scale Underground Recharge Facility project, HSI designed and constructed four Aquifer Storage and Recovery (ASR) wells capable of injecting and recovering reclaimed effluent using an automated operating system that matches injection rates with reclaimed plant production. The recharge facility is permitted to recharge up to 3,600 acre-feet annually (or 3.2 million gallons per day). The added benefit to this facility is the capability to recover the recharged water with the same wells used for recharge. This allows the FHSD to recharge excess reclaimed water in the cooler winter months when less water is needed by the park grounds and golf courses, and then recover water in the summer when that surplus water is needed for keeping the turf green. For more background on the project, read our 2002 article from the Arizona Hydrological Society Newsletter. |
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An innovative vault design adds to this state-of-the-art facility. |
Aquifer Storage and Recovery (ASR) |
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Views of the Vidler recharge basins and canal delivery system |
Fountain Hills Recharge Facility |
City of Scottsdale — Water Campus |
Vidler Recharge Facility |
