📕 High responsibility of hydraulic structures (HS) imposes to them increased requirements regarding the reliability of strength design and safety. This fundamental monograph incorporates 30 years of scientific researches of concrete underground culverts and dams conducted by the scientific school of Dr. Tech. Sci., Prof. M.I. Frolov. System analysis of HS stress state allows to save materials and money for HS constructing. For correct application of numerical methods for HS design it’s necessary the considerable scientific experience for creating high-quality models and subsequent correct interpretation of results in order to adequately reflect the work of real HS.