The National Association of Generating Companies –ANDEG, created in November 2010, is a private non-profit organization, in which 13 electric power generating companies are located in Colombia. Within ANDEG there are domiciliary public utility companies of private and public regime, which represent 4,075 MW of effective generation capacity corresponding to 23.5% of the national total. Additionally, these companies have a firm energy of 31,569 GWh-Year to deliver to the system, which corresponds to 47% of the total to be demanded in 2017.