In order to classify, regulate, restrict and segregate the uses of land and buildings, to regulate and restrict the height and size of buildings, to regulate the area of yards and other open spaces about buildings, and to regulate the density of population, the following classes of use districts and subdistricts are established:
R-1
Residential – Low density single-family
R-2
Residential – Moderate density single-family
R-3
Residential – Mixed residential
R-4
Residential – Multifamily
GO
General office
RMHP
Residential manufactured home park
NB
Neighborhood business
HCB
Highway and community business
CB-1
Central business 1
CB-2
Central business 2
RVP
Trailer courts or recreational vehicle parks
PUD
Planned unit development
LI
Light industrial
P
Public
H
Hospital
OT
Old Town overlay
(Ord. 1960 § 3, 1998)
On the effective date of the ordinance codified in this title, the provisions of this title shall apply to and govern the use or maintenance or keeping of any land or other property in the city, exclusive of streets, alleys and public lands used or reserved for governmental purposes as provided by law. The city shall be divided by the city council into parts and each such part may be subdivided into units for purposes of imposing or establishing districts and subdistricts on land and property. Such parts or units may be zoned and rezoned whenever the city council, after investigation and report by the planning commission, finds that public convenience, the general welfare or good zoning practice justifies such action.
(Ord. 1960 § 3, 1998)
The location and geographical boundaries of various districts shall be shown on a map or maps setting forth the district classifications applicable to the land and property contained in the zoning map.
(Ord. 1960 § 3, 1998)
The zoning map may, for convenience of use and for purposes of more readily identifying locations within such zoning map, be subdivided into units and such parts and units may be separately employed for identification purposes when amending the zoning map or for any official reference to the zoning map.
(Ord. 1960 § 3, 1998)
Where uncertainty exists as to the boundaries of any district as shown on any zoning map or part thereof, the following rules apply:
A. 
Where such boundaries are indicated as approximately following street lines, alley lines or lot lines and are not more than 20 feet therefrom, such lines shall be construed to be such boundaries.
B. 
In the case of unsubdivided property and where a zone boundary divides a lot the locations of such boundaries, unless the same are indicated by dimensions, shall be determined by the use of the scale appearing on such zoning map.
C. 
Where a public street or alley is officially vacated, the zoning regulations applicable to abutting property on each side of the centerline apply up to the centerline of such vacated street or alley on each respective side thereof.
D. 
Areas of dedicated streets or alleys and railroad rights-of-way, other than those designated on the zoning map as being classified in one of the districts provided in this title, shall be deemed to be unclassified and, in the case of railroad rights-of-way, permitted to be used solely for the purpose of accommodating tracks, signals and other operative devices and the movement of rolling stock.
(Ord. 1960 § 3, 1998)
All zoning of annexed areas shall have zoning established that is consistent with the comprehensive plan designation(s) for the subject areas.
(Ord. 1960 § 3, 1998)
In a district rezoned from a more restrictive classification to a less restrictive classification or where a trailer house or mobile home park permit is issued, a building permit must be secured in accordance with the approved final site development plan within three years from the effective date of the ordinance establishing such district. On the zoning map there shall be printed or indicated the effective date and the expiration date. When the above time limit has not been complied with, the zoning district so established shall automatically revert to its prior classification.
(Ord. 1960 § 3, 1998)