All the indices should be analyzed and determined for the whole period of operation of the System c0mponents under examination and should be compared with analogous indices of an alternate plan for the given branch and economic district. Particular attention should be paid to establishing a comparison between the initial economic and branch data. Thus, initial data of the conjugate objects (branches) must reflect the actual cost, taking into account the reappraisals of funds and the effect of other factors as, for example, improvements in work organization, etc. Following are outlined the methodological and practical recommendations, developed as a result of determInation of the actual economic effectiveness of the Upper-Svirsk complex hydro-system. The selection of the Upper-Svirsk hydro-system for this examination was determined by the fact that its hydro-electric station (HES) has been in operation for 13 years and is performing typical hydro-electron functions in the system such as participating in covering the peak loads and regulating the frequency. The Dubrovskoye thermo-electric station (TES), which was built during the same years in the same power system and operated on the local fuel at comparable capacities, can be taken as a substitute. Construction of the Upper-Svirsk hydro-system was begun before the Great Patriotic War. However, in August, 1941, as a result of war activities, the construction area was flooded. Construction was completed in 1952 and temporary use begun in the same year. Following the high floods of 1953, Onezhskll Lake was filled so that electric generation reached its design level The hydro-station is equipped with four turbines, each having a capacity of 40 MW. It is connected by 220-kV electric transmission lines with the Leningrad and Karelskii power systems. The substitute Dubrovskoye thermo-electric station was built during the pre-war years. This station (200 MW) was the largest electric generating plant in the system, and was considered as a reliable source of power for Leningrad because the fuel, consisting of local peat resources, was available. During the Great Patriotic War, the Dubrovskoye station was totally destroyed and its restoration required approximately the same capital, labor, and time investment as would have been required by a new station. In this respect construction of the Dubrovskoye station was found to be on equal conditions with the Upper-Svirsk station. The first phase (200 MW) was accomplished during 1944-1951, and the second phase (312 MW) in 1956. An important factor in economic effectiveness of production is the extent of utilization of the fixed and operational funds. The dynamics of utilizing funds in power production prov,.'des only an indirect characteristic of the effectiveness of operation in electric stations and sometimes also in the whole power systems. This is because practically all of the operational, technical, and economical indices are dependent on the work conditions in the