This paper presents an estimation of the intensity of lithodynamic processes, and calculation results of sediment accumulation for the seaway navigation canal of the Sabetta port (the Yamal Peninsula), on the basis of data of complex engineering surveys carried out in the field seasons in 2011–2013. The sediment accumulation in the canal is assessed using data of the methods of seismic stratigraphy, sedimentation traps, and using data of the newly proposed method of artificial canals. The authors calculate the volume of sediments carried into the canal due to exaration. The intensity of lithodynamic processes is estimated as high or very high in the north of the canal, and as medium or high in its central and southern parts.