In this paper, Hydro Power Plants are classified based on existing standards and according to available and possible sizes. Also, normative regulations regarding the usage of water as a restorable resource are exposed . Standard structures of electro-energetic system management are being analyzed, especially in relation to hydro power plants . System of process informatics with parameters related to the structure of the information system is developed for small hydro power plants. Communications networks with emphasis on MPI, Profibus, and SCADA programs for humane-machine interface are defined as well. Possible structures of an information system that would allow communication between the plants and with a superior management center are suggested for a real system of four small hydro power plants located in close proximity. Economic analysis and the justification for investing in this communication system are also explained. Optimal structure and technical solution for this management system are proposed based on an efficiency criterion analysis. Attached are blueprints showing connections and wiring required for one small hydro power plant; these connections are the foundation for developing a system that would allow same-level communication between the plants as well as communication with the superior management center.