Engineering geology is the applied geoscience discipline that characterizes and interprets geological conditions to inform the design, construction, and maintenance of civil and mining engineering works. It integrates rock and soil mechanics, structural geology, geomorphology, hydrogeology, and geotechnical investigations to evaluate material properties, discontinuities, stability, and deformation behavior under imposed loads and environmental changes. Engineering geologists assess hazards such as landslides, rockfalls, subsidence, liquefaction, and seismic response, and produce ground models, engineering geological maps, and risk assessments that constrain foundation design, slope stabilization, tunneling, reservoir siting, and linear infrastructure alignment.