A.

District List
The city's open space, public, and aviation zoning districts are listed below. When this zoning ordinance refers to "open space and public" zoning districts or "OP" districts or to "aviation" zoning district or "A" district, it is referring to these districts.

B.

Purpose

1.

OP1
The OP1 district is primarily intended to preserve open space and sensitive natural resource areas, including environmentally sensitive and agricultural areas.

2.

OP2
The OP2 district is primarily intended to preserve open space and sensitive natural resource areas, while also allowing very low-density residential use, ideally in the form of cluster development. The district is further intended to:

a.

Encourage the continuing use of land for agricultural and natural resource protection;

b.

Protect open lands not capable of supporting urbanized development due to biologic, physiographic or hydrologic constraints; and

c.

Protect open and scenic lands from untimely urbanized development that tends to increase expenditures of public funds for supplying public services.

3.

OP3
The OP3 district is primarily intended to accommodate public, quasi-public and institutional uses.

4.

A
The A district is to provide a specific zoning classification for aviation and industrial, service, and commercial uses related to or compatible with Airport operations.

(Ord. 3621, 2018; Ord. 3439, 2010; Ord. 3410, 2009)

A.

Use Table
Principal uses are allowed in "OP" or "A" zoning districts in accordance with Table 20.20-1, below.

B.

Use Classification System
For the purpose of this zoning ordinance, uses are classified into "use groups," "use categories," and "specific use types." These are described and defined in Chapter 20.105. Uses are identified in the first column of Table 20.20-1.

C.

Permitted Uses
Uses identified with a "P" in Table 20.20-1 are permitted as-of-right in the subject zoning district, subject to compliance with any use standards identified in the final column of the table and all other applicable standards of this zoning ordinance.

D.

Conditional Uses
Uses identified with a "C" in Table 20.20-1 may be allowed if reviewed and approved in accordance with the conditional use procedures of 20.85.070. Conditional uses are subject to compliance with any use standards identified in the final column of the table and all other applicable standards of this zoning ordinance.

E.

Prohibited Uses
Uses identified with a "-" are expressly prohibited.

F.

Use Standards
The "use standards" column of Table 20.20-1 identifies use-specific standards that apply to some uses. Unless otherwise expressly stated, compliance with such standards is required regardless of whether the use is permitted as-of-right or requires conditional use approval.

Table 20.20-1 Uses Allowed in Open Space, Public, and Aviation Districts

(Ord. 3769, 2025; Ord. 3736, 2024; Ord. 3733, 2024; Ord. 3723, 2023; Ord. 3705, 2022; Ord. 3621, 2018; Ord. 3549; 2015; Ord. 3519, 2014; Ord. 3471, 2011; Ord. 3439, 2010; Ord. 3410, 2009)

Note— Interim provisions of Ord. 3769 expire March 24, 2026.

Two development options—conventional and cluster—are offered in the OP2 district as a way of promoting conservation of natural resources, including agricultural lands. Either of the development options may be used at the property owner's election.

A.

Conventional Development
"Conventional development" is any development that is not part of an approved cluster development. Parcel and building standards for conventional development can be found in 20.20.040 (Table 20.20-2).

B.

Cluster Development

1.

Intent
The cluster development option in the OP2 district is intended to encourage development designs that are more efficient and provide more open space and greater natural resource protection than conventional development designs.

2.

General Description

a.

The cluster development standards of this chapter require that a specified portion of each development be set aside and permanently preserved as open space.

b.

Cluster developments must be reviewed in accordance with the city's subdivision plat, condominium plat or planned unit development review process.

c.

Additional information on cluster and conservation development can be found in Chapter 20.55.

3.

Regulations
The cluster development option is available in the OP2 district. It allows smaller parcels and other flexible parcel and building standards in exchange for the provision of common open space that is not typically provided in a conventional development. Parcel and building standards for cluster development can be found in 20.20.040 (Table 20.20-2). Additional cluster development standards are included in Chapter 20.55.

(Ord. 3621, 2018; Ord. 3439, 2010; Ord. 3410, 2009)

A.

All development in OP and A districts must comply with the parcel and building standards of Table 20.20-2, except as otherwise expressly provided. General exceptions to parcel and building standards and rules for measuring compliance can be found in Chapter 20.110.

Table 20.20-2 Parceland Building Standards (Open Space, Public Districts, and Aviation)

[1] Setback also applies on street side.

(Ord. 3621, 2018; Ord. 3439, 2010; Ord. 3410, 2009)

Uses and development in OP districts may be subject to other provisions of this zoning ordinance, including the following:

A.

Accessory Usesand Structures
See Chapter 20.45.

B.

Natural Resource Protection
See Chapter 20.50.

C.

Parking and Access
See Chapter 20.60.

D.

Landscaping
See Chapter 20.65.

E.

Overlay Districts
See Chapter 20.25.

F.

Signs
See Chapter 20.75.

(Ord. 3621, 2018; Ord. 3439, 2010; Ord. 3410, 2009)

Uses and development in A districts may be subject to other provisions of this zoning ordinance, including the following:

A.

Accessory Usesand Structures
See Chapter 20.45.

B.

Natural Resource Protection
See Chapter 20.50.

C.

Overlay Districts
See Chapter 20.25.

(Ord. 3621, 2018)