There are a lot of coastal structures along the Egyptian northern coast, especially at lagoons inlets. El-Alamein new city (ANC) is located on the northwestern coast of Egypt, extending 100 km from Alexandria. Internal artificial lagoons will be constructed infront of ANC. As a consequence, hard structures such as jetties and groins will be constructed to partially reduce the strength of attacking waves and scientifically minimize sedimentation at lagoon inlets, which helps to renew water and increase the quality of internal lakes. The study area is divided into 3 zones. ANC is on the western side of the study area (zone1), El-Alamein Marina tourist center (AMTC) is on the middle side (zone2), and El-Alamein downdrift area (El- Ahlam and El Louts village...) is on the eastern side (zone3). The effect of coastal structures at the downdrift area was evaluated using remote sensing imagery and the Digital Shoreline Analysis System (DSAS) software to evaluate historical shoreline changes from 1988 to now. It is regarded as a natural physical model for the new study area in hopes of avoiding its negative impacts on the study area. In March 2019 and March 2021, hydrographic surveying was conducted twice for ANC. Where topographic and hydrographic surveying was implemented over approximately 40 km to cover the study area for 80 profiles, extending 1.5 km from the shoreline to create extensive bathymetric maps and represent the bottom at distances of around 500 meters, which will be used as inputs for mathematical models. The presence of submerged ridges was discovered after evaluating the bathymetric data in front of AMTC and El- Ahlam village. The main target of the study is to estimate the effects of the coastal protection structures of AMTC and find the appropriate solution to protect the entrances of artificial lakes inlets in front of ANC.