The main studies included in the scientific support of the project of the sea terminal of the Nakhodka mineral fertilizer plant are presented. The project of the plant for the production of methanol and nitrogen fertilizers in Primorsky Krai is one of the most significant objects for the Far East region. The presented work presents research on ensuring the selection of a rational layout and the most efficient designs of hydraulic structures of a marine terminal, in accordance with the current regulatory documents of the Russian Federation in the field of marine hydraulic engineering. In addition, studies of the operation of coastal structures are presented taking into account the nonlinear properties of foundation soils in the MIDAS GTS NX software package and verification of the adopted design solutions for the structures under study for compliance with current regulatory documents in the field of design and construction of foundations and bases in the Russian Federation.