The open space (OS) zone may be cited as the "OS zone" and is established to provide areas where large and small scale open space amenities can be located in the city. Generally these areas are to be open or largely undeveloped. The zone is intended to encourage a comprehensive network of permanent, multifunctional, publicly and privately owned open spaces. Development standards are designed to prevent the encroachment of residential, commercial, and industrial uses into open space areas and to help implement open space objectives of the city's general plan.

Uses may be conducted in OS zones only in accordance with the following regulations:

1. Only allowed permitted, conditional or accessory uses as set forth in this chapter may be conducted in OS zones. A conditional use permit must be obtained prior to the establishment of a conditional use.
2. Accessory uses and buildings are permitted in OS zones only in conjunction with allowed permitted and conditional uses. Accessory uses include, but are not limited to, parking lots and terraces, properly screened utility and loading areas and other buildings and activities which are incidental and subordinate to the principal permitted or conditional use on the premises.
3. There shall be no open storage of trash, debris, used materials, wrecked or neglected equipment or materials in OS zones.
4. No vehicle, boat or trailer, or parts thereof, which is in a wrecked, junked, dismantled, inoperative or abandoned condition, attended or not, may be parked or stored in OS zones for longer than seventy two (72) hours unless stored within a completely enclosed building.
5. No commercial vehicles such as earthmoving or material handling equipment, semitrucks or trailers or any commercial truck, trailer or vehicle may be stored in OS zones for longer than seventy two (72) hours, except in conjunction with an approved use or approved development or construction activities on the property.
6. Utility trailers and recreational vehicles such as motorhomes, travel trailers, watercraft, campers and all-terrain vehicles, may not be stored in any area in OS zones.

All uses proposed in OS zones may only be established in conformance with development review procedures of the city. Applicants shall follow the procedures and requirements of this code regarding development review in the preparation and review of development proposals in the OS zones. All uses shall be conducted according to the approved plan or plat and any conditions of approval. Plans or plats may not be altered without prior approval of the city, except as allowed under state law.

No minimum lot width is required for lots in the OS zone except that parcels shall have sufficient frontage or access to accommodate proposed development. Parcels not fronting on a street must be accessible via a recorded easement or right of way.

The following area requirements shall apply in the OS zone:

1. Minimum Zone Area: The minimum area in an OS zone shall be one acre.
2. Minimum Lot Area: There shall be no minimum lot area in OS zones except that parcels shall have sufficient size to accommodate proposed development.

Nonconforming lots or parcels of land which legally existed or were created by a preliminary or final plat approval prior to the establishment of an OS zone shall be brought into conformance with the requirements of this chapter prior to development.

Parking areas and access in OS zones shall meet requirements of title 16, chapter 16.26 of this code.

The following fencing, screening and clear vision requirements shall apply in OS zones:

1. All mechanical equipment, antennas (where possible), loading and utility areas and trash receptacles shall be screened from view with architectural features or walls consistent with materials used in the associated buildings.
2. The boundary of an OS zone which is not in or adjacent to a street and which is adjacent to a residential or agricultural zone may be required to be fenced. Fencing or landscaping techniques may be required to buffer and protect waterways, trails, parks, open spaces or other uses as determined with development approval.
3. No wall, fence or screening material shall be erected between a street and a front or street side building line in OS zones, except as required in subsection A of this section. Landscape materials within the Clear Vision Area shall comply with Section 16.04.200 (J).

The following architectural standards are required in OS zones:

1. Architectural drawings and elevations, exterior materials and colors of all buildings shall be submitted in conjunction with site plan review. In projects containing multiple buildings, a design book containing architectural theme, features, exterior materials and colors governing the entire project shall be submitted.
2. All building materials shall be high quality, durable and low maintenance.
3. Exterior walls of buildings, in excess of sixty feet (60') in length, shall have relief features at least four inches (4") deep at planned intervals. All sides of buildings shall receive design consideration.
4. Signs shall meet requirements of title 16, chapter 16.36 of this code and shall be constructed of materials which complement the buildings which they identify.
5. The maximum building height in OS zones shall be thirty five feet (35'), unless otherwise approved by the planning commission.
6. The exteriors of buildings in the OS zone shall be properly maintained by the owners.

The following landscaping requirements and standards shall apply in OS zones. Landscaping in OS zones is also subject to the requirements of Title 16, Chapter 16.30, “Water Efficiency Standards,” of this Code.

1. The front, side and rear yards of lots in OS zones, shall be landscaped and properly maintained with grass, deciduous and evergreen trees and other plant material approved in conjunction with a site plan or plat for the development. Natural open space areas shall incorporate plant materials as provided in the city's "Jordan River Corridor Open Space And Habitat Conservation Master Plan And Management Guidelines".
2. All areas of lots in OS zones not approved for parking, buildings or other hard surfacing shall be landscaped and properly maintained with grass, deciduous and evergreen trees and other plant material approved in conjunction with a site plan or plat for the development. Natural open space areas shall incorporate plant materials as provided in the city's "Jordan River Corridor Open Space And Habitat Conservation Master Plan And Management Guidelines".
3. A minimum of thirty percent (30%) of required yard area trees shall be minimum seven foot (7') evergreens. Deciduous trees shall be minimum two inch (2") caliper. Deciduous and evergreen trees required in this section need not be equally spaced but shall be dispersed throughout the required yard areas on the site.
4. All collector streets and other public and private park strips in OS zones shall be improved and maintained by the adjoining owners according to specifications adopted by the city unless otherwise allowed with development approval.
5. Trees may not be topped nor may any landscape material be removed in OS zones without city approval. Any dead plant material shall be replaced in accordance with the requirements of this chapter and the conditions of site plan or plat approval.
6. The following landscaping requirements shall apply in parking areas in OS zones:
   1. Planters with two inch (2") or larger caliper shade trees and other approved plant/landscape materials shall be installed at the ends of parking rows. Planters shall be at least five feet (5') wide.
   2. Shade trees shall be planted in double parking rows at minimum intervals of six (6) stalls and along single parking rows at minimum thirty foot (30') intervals and no farther than six feet (6') from the parking area.
   3. Minimum five foot (5') landscaped planters shall be provided around building foundations except at building entrances and loading and utility areas.
7. Development which is contiguous to canals, streams or drainage areas shall make reasonable efforts to include banks and rights of way in the landscaping of the project and the urban trails system. Any areas so included and perpetually preserved may be counted toward required yard space. If approved by the city engineer, waterways which traverse developments may be left open if properly landscaped and maintained by the adjacent owners. Waterways may not be altered without written approval of any entity or agency having jurisdiction over said waterways.
8. All required landscaping in OS zones shall be installed (or escrowed due to season) prior to occupancy.
9. All landscaped areas, including adjoining public right of way areas, shall be properly irrigated and maintained by the owners.

A lighting plan shall be submitted with all new developments in the OS zone. Site lighting shall be shielded to prevent glare on adjacent properties.

Lighting fixtures shall be architectural grade with a unified streetlight design, as approved by the city engineer.

1. Grading And Drainage: All development sites in OS zones shall be graded according to the city engineering and building requirements to provide adequate drainage. Buildings shall be equipped with facilities for the discharge of all roof drainage onto the subject lot or parcel.
2. Maintenance: All private areas in developments shall be properly maintained by the owners.
3. Easements: Buildings may not be located within a public easement.
4. Phasing Plan: A project phasing plan shall be submitted for review at the time of plat or site plan approval. Development shall be in accordance with the phasing plan unless a revised phasing plan is approved by the city.

1. Purpose Of The OS-P Subdistrict: The purpose of this subdistrict is to encourage the acquisition and development of park open space acreage within the City. The focus of the zone is to help implement the open space and recreational goals and policies of the City's general plan, as well as the City's open space master plan, in regards to developable open space.

The following uses may be conducted in the OS-P Subdistrict:

Accessory uses to approved permitted and conditional uses, such as, but not limited to, restrooms, parking lots, properly screened utility and loading areas, the preparing, serving and/or sale of food and beverages, the sale of equipment and supplies, in connection with approved recreational activities, and other buildings and activities which are incidental and subordinate to the principal permitted or conditional use on the premises.

Botanical gardens.

Community gardens.

Conservation areas, including, but not limited to, watershed areas, wildlife refuges, wetlands, woodlands, and riparian areas.

Nature or zoological exhibits and facilities.

Open air theaters, amphitheaters, and meeting places.

Trails, trailheads, and walkways.

Cemetery.

Parks and recreational areas, including, but not limited to, playgrounds, athletic fields, golf courses, country clubs, tennis courts, pavilions, dog parks, urban fisheries, and swimming pools.

Public, quasi-public facilities.

Telecommunications, meeting the requirements of chapter 17.112 of this title.

1. Purpose Of The OS-N Subdistrict: The purpose of this subdistrict is to encourage the acquisition and protection of natural open space acreage within the City. Activities that may have a detrimental effect upon natural open space are discouraged. The focus of the zone is to help implement the open space goals and policies of the City's general plan, as well as the City's open space master plan in regards to the protection of natural open space.
   

The following uses may be conducted in the OS-N Subdistrict:

Accessory uses to approve permitted and conditional uses, such as, but not limited to, restrooms, parking lots and other buildings and activities which are incidental and subordinate to the principal permitted use on the premises.

Botanical gardens.

Community gardens.

Conservation areas, including, but not limited to, watershed areas, wildlife refuges, wetlands, woodlands, and riparian areas.

Nature or zoological exhibits and facilities.

Open air theaters, amphitheaters, and meeting places.

Trails, trailheads, and walkways.

Parks for the preservation of natural open space and trails.

Public, quasi-public facilities.