Even before the start of design, a thorough study of the hydrogeological nature of the construction site is necessary.
Based on this study, a plan of the construction site should be drawn up in horizontals with all the laid pits and drilling wells on it, the mouths of which should be linked to the topography of the site in the plan and in the profile. In addition, all existing on it should be applied to the plan, as well as located near the building and structure, all drains and reservoirs and everything else that can replenish the geological and general characteristics of the construction site.