The purpose of the OS Open Space District is to preserve and protect natural amenities; to encourage the development of land for recreation and conservation purposes; to prevent intensive use of the City's waterfront properties that are subject to periodic flooding and poor drainage; to protect watershed areas, natural drainage channels and watercourses; and to create conditions conducive to carrying out the purpose of this chapter.
A building may be used, erected or altered and a lot may be used for any of the following purposes:
A. 
Public parks, playgrounds, playfields, swimming facilities and other similar recreational facilities, including refreshment stands for the seasonal distribution of food and drink.
B. 
Facilities for conserving natural resources and protecting waterways, channels and drainageways.
C. 
Public utility structures and uses, including substations and water pumping stations.
D. 
Identification signs, when erected and maintained in accordance with the provisions of Article XIII.
A. 
Lot area and width. There shall be no limit to lot area and width.
B. 
Lot coverage. The principal and accessory buildings shall not cover more than 20% of the lot.
C. 
Yards. Each lot shall have front, side and rear yards of not less than the following minimum requirements:
(1) 
Front: 50 feet.
(2) 
Side: 50 feet.
(3) 
Rear: none, except as required by § 175-82.
No building shall be erected to a height in excess of 35 feet; provided, however, that this height may be increased one foot for each additional foot that the width of each yard exceeds the minimum required.
Off-street parking and loading areas shall be provided in accordance with Articles XIV and XV.
The following uses shall be permitted only when authorized by the Zoning Hearing Board in accordance with the procedures established in Article XVI: private recreation facilities associated with boating activities, such as marinas, boat docks, moorings and necessary appurtenances.
No building, structure or portion thereof shall be erected, altered or converted to any of the following uses:
A. 
Residential uses.
B. 
Private recreation uses for financial gain, such as amusement parks, concessions, cartways, racetracks, miniature golf courses, outdoor theaters, pool halls and other similar uses.
For obstruction to waterways provisions, see Article XI, § 175-82.