The U-1 District is intended to preserve and protect the heavily wooded areas, creeks, stream banks and adjacent flood plain areas of the City planning area from adverse future development. This district is also intended to provide for open space and the development of major public utility facilities where required to serve the needs of the community.

1.   Principal Permitted Uses. Only the following uses of structures or land shall be permitted in the U-1 District:

   A.   Agriculture, truck gardening and nurseries, and the usual accessory buildings; provided, no permanent dwelling units shall be erected thereon unless the tract contains ten or more acres.

   B.   Forests and forestry.

   C.   Publicly owned parks, playgrounds, golf courses, and recreational uses.

   D.   Any use erected or maintained by a public agency.

   E.   The uses listed in paragraph F of this section shall be permitted subject to approval by the Board of Adjustment after public hearing. In its determination upon the particular uses at the location requested, the Board of Adjustment shall consider all of the following provisions:

      (1)   The proposed location, design, construction and operation of the particular use adequately safeguards the health, safety and general welfare of persons residing or working in adjoining or surrounding property.

      (2)   Such use shall not impair an adequate supply of light and air to surrounding property.

      (3)   Such use shall not unduly increase congestion in the streets or public danger of fire or flood, and shall not endanger the public safety.

      (4)   Such use shall not diminish or impair established property values in adjoining or surrounding property.

      (5)   Such use shall be in accord with the intent, purpose, and spirit of this Zoning Ordinance and the comprehensive plan of the City.

   F.   The uses subject to the provisions of paragraph E of this section are as follows:

      (1)   Amusement enterprises, such as race tracks, carnivals, circuses, rides and shows, and similar enterprises.

      (2)   Mining and extraction of minerals of raw materials.

      (3)   Airports and landing fields.

      (4)   Private playgrounds, golf courses, and recreational uses.

      (5)   Public utility structures and equipment necessary for the operation thereof.

      (6)   Transmitting stations.

      (7)   Dumping of noncombustible materials for landfill purposes.

      (8)   Sanitary and combustible landfill.

2.   Permitted Accessory Uses. Permitted accessory uses in the U-1 District are as follows:

   A.   Accessory buildings and uses customarily incidental to any of the uses set forth in subsection 1.

3.   Area and Size Regulations. The following minimum area and size requirements shall be observed in the U-1 District:

   A.   Front Yard: 50 feet.

   B.   Side Yard: two side yards not less than 50 feet each.

   C.   Rear Yard: 50 feet.

   D.   Maximum Height: no limitation.

   E.   Maximum Number of Stories: no limitation.