The open space (os) zone is established to implement the open space/conservation element of the general plan and the public lands/parks land use designation. To provide for permanent open space within the community, the OS zone designates land for public and private uses related to open space, recreation, education and public facilities, land with unique scenic or geologic value, land requiring protection of unique or rare plant and/or animal habitat, and land whose unrestricted use might' endanger the public health, safety or welfare. This zone also permits the reasonable use of such land while conserving and protecting open space as a limited and valuable resource, or protecting the public health, safety, and welfare.

Table 33-41 lists those uses in the open space district which are permitted (P) subject to plot plan review, or subject to a conditional use permit (C).

Accessory uses and structures are permitted in open space zones, provided they are incidental to, and do not substantially alter the operating character of the permitted principal use or structure as determined by the director of community development. Such permitted accessory uses and structures include, but are not limited to, the following:

In addition to the property development standards set forth in this chapter, minimum yard requirements along each property boundary shall be consistent with the yard requirements of the zone of the adjacent lot along each boundary. The city council may adopt by resolution park plan standards or park master plans.

Prior to constructing recreational facilities in an undeveloped park site, a park master plan shall be approved involving community input. For existing park sites that have developed without a master plan, any new building or structure proposed, or any time a new use of land or existing structure is proposed that requires additional off-street parking, a plot plan application shall be submitted to the planning division. In such an event, surrounding property owners shall be notified of the proposed change consistent with the provisions found in section 33-1300. A plot plan will not be required for implementation of approved park plans where the building plans are consistent with the previously approved park plan or park master plan. Park plans and park master plans may be referred to the planning commission upon the determination of the director of community development. Open space areas that are designated for public park purposes shall be assigned a sub-zone designator "OS-P" (open space-park) to disclose to the public that active and/or passive public recreational uses shall be planned or constructed on the site.