Abstract: A method of manufacturing a tank farm comprises designating on a map of the terrain in which the tank farm is to be located, elongate strips of ground surface located at different predetermined levels of said terrain, the longitudinal axis of each of which strips, when taken in plan view, substantially conforms to a contour line of the map, forming tank sites in the terrain in the form of shallow trenches corresponding to the location of said strips, constructing on each of said tank sites an elongate tank having its longitudinal axis substantially horizontal, its vertical dimension being substantially the same as the depth of the trench, and covering the tanks with the earthworks excavated from said trenches substantially to restore the contour of the natural terrain.