Conservation A District. This district includes land that is used for recreation, municipal or educational purposes which, if used intensively, would unduly harm the public health, safety and/or welfare. Much of this land is on steep slopes subject to landslides and excessive siltation of streams, and in floodplains. Development of these areas would alter drainage patterns, create severe erosion problems and damage to downstream areas, as well as endangering human lives and property affected by such development. The publicly owned areas, in particular, help to establish an open space network, relieving the patterns of more intense development surrounding them. All the areas are significant in enabling the Township Council to fulfill its responsibilities under Article 1, S. 27 of the Constitution of Pennsylvania. Recognizing that in a few instances the primary uses for this district may not provide a reasonable economic use of particular property, some conditional uses are provided for. It is the intent that within this Conservation District, such conditional uses be limited strictly to prevent building on steep slopes where landslides or excessive erosion and sedimentation of streams are likely to result, or in floodplains (subject to one-hundred-year base flood), or where the values protected by Article 1, S. 27, of the Constitution of Pennsylvania will be harmed. (See § 310-32.)