Project management is an area within organizational theory and practice that is constantly evolving. Although the literature lists various project definitions, one thing is certain, and that is that the implementation of projects plays a key role in achieving the organizational strategy and goals of the company. The purpose of this graduation thesis is to demonstrate the communication management process using a project from practice carried out by the company "Odvodnja Rovinj-Rovigno d.o.o." A prerequisite for this is a well-defined communication plan for the project, which will enable timely and effective communication with all interest and influence groups on the project. To begin with, it is necessary to identify all interested parties of the project and then to determine what types of information will be distributed to which stakeholders, when, how often, in what way, and who is responsible for the transfer of information. Through the work, it was discovered that the continuous exchange of information between stakeholders through various communication media, as well as the regular holding of meetings, enables solving problems, monitoring and controlling the activities carried out, and informing citizens and the general public about news related to the Project. In the end, it is concluded that effective and timely communication, together with the knowledge, skills, and experience of the project stakeholders and compliance with the items from the contract, contribute to the successful implementation of a project such as this one.