The object of research is the processes of managing the creation of information support for projects to neutralize potentially dangerous underwater objects. In such projects, complex information flows circulate at all phases of their life cycle, so structuring and defining the components is an important part of the project product. One of the most problematic areas is the lack of scientifically grounded recommendations for creation of an information platform for projects to neutralize potentially dangerous underwater objects, which complicates project management both at the planning stage and at the implementation stage. In the course of the research, a list of participating organizations involved in projects for neutralization of potentially dangerous underwater objects is developed on the basis of attracting successful practices in managing complex equipment projects and the main consumers of information for these projects are identified. This forms a scientific and methodological basis for developing an information platform model for projects for neutralization of potentially dangerous underwater objects and for structuring the main types of their information support. The model of the information platform for project management of potentially dangerous underwater objects is proposed as part of technical, technological, organizational and economic information platforms. Together they form the instrumental basis for creation of applied software for the management of projects for neutralizing the water areas of the state from potentially dangerous underwater objects. The scientific methodology for the development of the information platform model simplifies the planning of the information component of such projects as tasks of national importance. In comparison with similar well-known approaches to the management of complex projects, this forms a full set of stakeholders and ensures that information needs of all participants in projects for neutralization of potentially dangerous underwater objects in the water areas of the state are taken into account. In general, the proposed model of the information platform for project management for the neutralization of potentially dangerous underwater objects makes it possible to simplify the planning of information support for such projects and improve the overall effectiveness of their planning and implementation.