Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Natural Energy Laboratory of Hawaii Authority (NELHA) is an education and research facility founded in 1974 for research into the uses of Deep Ocean Water in Ocean thermal energy conversion (OTEC) renewable energy production and in aquaculture. It later added research into sustainable uses of natural energy sources such as solar energy. It is located at Keahole Point in the North Kona District. The entrance is on the Hawaii Belt Road at coordinates 19°42 58 N 156°02 01 W / 19.71611°N 156.03361°W / 19.71611; -156.03361Coordinates: 19°42 58 N 156°02 01 W / 19.71611°N 156.03361°W / 19.71611; -156.03361, just south of the Kona International Airport. The laboratory was founded in 1974 with 345 acres, associated with the University of Hawaii. Large pipelines pump cold sea water from a depth of 3000 feet. For three months in 1979, a small amount of electricity was generated. A larger plant was constructed in the Almost $250M was spent on Ocean thermal energy conversion, but by 1991, the research shifted to other areas.