Geothermal concession areas. TGC is a geothermal exploration and development company based in Oakland, California. It has been instrumental in the development of several geothermal projects in the western United States. The Hoyo-Monte Galan field is about 55 km northwest of Managua, adjacent to the Momotombo geothermal field, currently in operation. The agreement calls for TGC to own and operate the facility for 25 years.
Preliminary studies indicate that the geothermal reservoir is of the hot-water type.
The development of this geothermal resource would help Nicaragua avoid the combination of regularly occurring blackouts and brownouts due to lack of sufficient power generation.