The big changes of the economy, industry, and politics of the country began in the early days of Soviet power in 1917. A large part of this was performed according to Bolshevik Initial Decrees, documents of the Soviet government, signed by Vladimir Lenin. One of the most important and notable breakthroughs was the GOELRO plan, that planned a major change of the Soviet economy based on total electrification of the country. The Plan was developed in 1920 and covered a 10- to 15-year period. It included the making of a network of 30 regional power stations, including ten large hydroelectric power plants, and numerous electric-powered large industrial organizations. The Plan became the prototype for subsequent Five-Year Plans and was basically fulfilled by 1931.