KVA has information on file regarding these technologies. They offer interesting alternatives to our current thinking about energy.

Deep Hot Rock Geothermal: Unlimited thermal energy is available 24/7 if we can tap into it six miles below the Earth's crust (31,680 ft.) virtually anywhere on the planet; The deepest mechanical drillings have occurred at the Russian Kola Super-deep Borehole project, reaching a depth of over 40,000 ft.

Ocean Currents: While ocean currents move slowly relative to typical wind speeds, they carry a great deal of energy because of the density of water. Water is more than 800 times denser than air, so for the same surface area, water moving 12 miles per hour exerts about the same amount of force as a constant 110 mph wind. Ocean currents thus contain an enormous amount of energy that can be captured and converted to a usable form. It has been estimated that taking just 1/1000th the available energy from the Gulf Stream would supply Florida with 35% of its electrical needs. The current of the Gulf Stream just East of Miami is 3.355 miles/hr., equivalent to a constant (if there is such a thing) 30 mph breeze.  A 30 ft. Dia. Turbine would produce ~300 kW/sec. which would equate to an $103,000 in annual revenue    (http://ocsenergy.anl.gov/guide/current/index.cfm)

Ohio River Locks and Dams: As we move forward to increase Wind Energy utilization it may be surprising to realize that if one third of the Ohio River flowing {July 2009 (52,000 ft^3/sec)/3} over just the 18 ft. high dam at the Mt. Vernon locks could be harnessed for electrical production it would equate to 45 wind turbines operating at 30% capacity -- 231,000 MWh/yr (4x the output of the large 25 MW PV Arrays in the Southwest). Estimated revenue stream: $7++ Million (at $40/MWh), and probably much more given that there are many months with much higher flow rates. A significant engineering challenge for river turbines is the difference in designing to withstand the impact of floating trees vs. bird strikes on wind turbines.