Imperial Valley-East Mesa, with 6 units for 120 MW of installed capacity, in operation since 1986-1989, by Ormat.

Imperial Valley-Heber, 205 MW of installed capacity with 25 units; and an intense planned activity by Ormat, with a short term target of 270 MW. In this field the new plants of Gould (2x5 MW binary, in 2006), Heber South (10 MW binary, in 2008) and the recent North Brawley (7x7 MW binary, in 2009) have been commissioned.

Imperial Valley-Salton Sea, with 13 units for 333 MW, operated by CalEnergy, and new units planned for a total of 330 MW, after the last additions in year 2000.

COSO (Terra Gen), nine unites for an installed capacity of 270 MW, without any further planned development, in operation since 1987-1989.

Mammoth, 10 units for 40 MW operated by a consortium Constellation/Ormat, commissioned in 1984 and 1990.

Honey Lake: only three small binary units are operating since 1988 (Amedee) and 1985 (Wineagle). The geothermal contribution from the hybrid HL Power, which uses geothermal as a wood chip dryer and a boiler preheat for 36 MW biomass unit, can be accounted as 1.5 MW, even if recent information are indicating the strong reduction in well flow rate, and probably the geothermal electricity production is not operative anymore, but only the heat is used for boiler preheat and wood chip drying.

Enel Green Power is launching a 20 MW green field project in Surprise Valley.

In Soda Lake, ten units installed in 1987 and 1991 for a total 26 MW, no specific development is foreseen by Magma Energy.

At Steamboat Hills (Ormat) a new 12 MW binary plant is planned, in addition at the present 20 MW flash unit, commissioned in 1988.

A new 30 MW binary plant at Galena (Steamboat field) has been commissioned in 2008, with further two units planned by Ormat, with additional 35 MW. Refurbishment of the old Steamboat II has been completed. Moreover, 13 MW at Galena II in 2007 and 2x15 MW at Burdett plant in 2005 started their operative lives. The total capacity of Steamboat complex is 135 MW.

Further additions are foreseen for Desert Peak (30 MW, after the commissioning of unit II of 23 MW in 2006) by Ormat.

Another important realization has been commissioned by Enel Green Power, with 24+48 MW at Salt Wells and Stillwater, after the decommissioning of the old binary units (13 MW, operative at Stillwater since 1989).

In 2009 Nevada Geothermal Power commissioned its 50 MW binary plant Faulkner 1 at Blue Mountain.
After the recent BLM tender for several geothermal leases in Nevada, it is expected an intense construction activity in the near future.

Raser Technologies installed a pilot binary unit of 240 kW. The full project, Lightning Dock, is designed to produce 10 MW of electrical power and it is expected to go online in the coming years.

No private investors have been done any project in this state. However, the Oregon Institute of Technology completed for its campus the installation of a small 280 kW binary unit, which will be on line in 2010.
Two major projects at Newberry and Crump Geyser are in advanced stage of realization, for an aggregate capacity of 160 MW.

The Fort Cove plant has been shut down; the only existing unit in the state is Roosevelt, with 36 MW of installed capacity, from two binary units: 25 MW and a new 11 MW commissioned in 2007; it is operated by Pacific Corporation.
Utah got its second power plant in 2008, when Thermo Hot Springs went online, with 50 small binary units for an aggregate capacity of 10 MW (Raser Technologies).
Enel Green Power is launching a two step project of installing binary units at Fort Cove, with an initial 20 MW projects and an additional one for a total of 40 MW.

The Rocky Mountain Oilfield Testing Center (RMOTC) is located at the Teapot Dome oil field, also known as the Naval Petroleum Reserve, operated by the Department of Energy as a test site for oil and gas and renewable energy related technologies.
A small binary unit of 250 kW has been installed in 2009.

In total, in the USA there are about 2 million km2 of geothermal areas, with an estimated potential of 9 GW, which can be generated by the known geothermal resources, mainly in the western states, where Nevada and California represent more than 80% of all the planned projects. Only a strong effort, in term of legislative support and assistance in reducing the duration from the beginning of a geothermal project (lease acquisition) and the effective starting of electricity generation, which can sum up to 5-8 years, can be a key driver for reaching the ambitious target of an exponential increase in the geothermal electricity in the US (and in the world!).