The second major factor concerns the habitability of the site, which is subject to a major constraint related to drainage. The street that runs alongside the scheme is a storm water run-off corridor. The flood risk prevention regulations put in place by the City of Nimes limit occupation of the ground floor and require the classrooms to be placed on the first upper floor. This arrangement, which is quite atypical for a nursery school, is turned to advantage by the architects, who propose a building that is suspended in the foliage of the plane trees. From the classrooms, the children have a unusual pleasant view of the school’s natural setting.