Single prime design delivery system for the construction of a new school gymnasium facility and a classroom building at an existing elementary school. Due to an elevation error in the civil engineering plans, the new buildings were constructed 2 feet below the existing FEMA flood plain. Error was not discovered until after construction was completed. Remedial options included raising the buildings 2 feet or constructing a wall around the existing buildings to divert flood waters. The cost for either remedial plan exceeded available design professional insurance.