for 40 years. A key to the outstanding success of this floating cover was the regular maintenance and servicing performed by the San Juan Water District. It is believed that the Hinkle Reservoir is one of the longest-reported CSPE floating cover systems still operating. Happy Valley Reservoir * South Australia Water Corp., South Australia * 26.4-million-gallon (100-million-l) capacity * Potable water storage * CSPE liner and cover originally installed in 1988 In the mid-1980s, South Australia Water Corp. was evaluating the feasibility of installing geomembrane liners and covers on two new 26.4-million-gallon (100-million-l) earth bank potable water storage reservoirs adjacent to the Happy Valley water treatment plant. This plant provides potable water for most of the southern Adelaide region. Ambient temperatures for the area can reach as high as 114°F (46°C) with extreme high solar exposure in the summer months. Due to its proximity to the treatment plant, higher levels of chlorine were expected at the inlet stream. Extensive research and testing were carried out during the preliminary design stage on all liner materials available at the time. Significant focus was placed on the puncture resistance, flexibility, UV resistance and long-term durability of materials. This was due to Welding and testing equipment for the serious geosynthetics installer Pro-Wedge VM-20 Wedge Welder Over 6,000 units sold! Pro-Tester High-Pull Tensiometer for testing high-strength materials with new Auto-Engage feature (888) 324-WELD (9353) or 530 621-3200 Visit demtech.com or call for more product information. www.GeosyntheticsMagazine.com 0420GS_p32-40.indd 37 37 3/23/20 5:30 PMhttp://www.demtech.com http://www.GeosyntheticsMagazine.com