§ 159.040 DISTRICTS.
   (A)   Districts, generally. For the purpose of this chapter, the city is hereby divided into the following basic zoning use districts:
 
District Symbol, Intent, and Primary Use
A-1
Preserve land to be utilized for interim agriculture and commercial food production. A-1 Districts provide areas of rural lot density housing with lots large enough for significant agricultural activity to occur
R-1
Provide low density residential area in rapidly developing rural settings. R-1 Districts will provide lots large enough to maintain a semi-rural setting, but lots not large enough to support commercial agriculture. R-1 Districts will provide a buffer between agriculture districts and urban, or rapidly developing district
R-3
Provide residential lots for those people who desire larger lots than are provided for in an urban area
RB
Provide land for Retail Business, primarily shopping, in areas where there is, or will be, the greatest demand for such services and in areas capable of supporting the intensive use of the land demanded by retail businesses
 
(Prior Code, Ch. 300 § 601.01)
   (B)   Overlay zoning use districts. At the time of adoption of this chapter or at some future date, the City Council may adopt overlay districts to promote specific orderly development or to protect some specific sensitive natural resource (see § 159.042).
(Prior Code, Ch. 300 § 601.02)
   (C)   Overlay regulations. The following overlay regulations are in addition to regulations imposed by the existing basic zoning use districts:
 
District Symbol
Intent and Primary Use
AZ
Protect life from potential aircraft catastrophe and noise by restricting development in Airport Zones
PUD
Allow innovative and flexible design for developments that are more sympathetic to both humans and nature, and which are not possible under current regulations
FP
Protect the natural environment, homes and other structures from floodwaters by preserving the natural overflow areas of lakes, streams, and rivers
SCRD
Conserve and protect the natural scenic values and resources of the St. Croix River Valley in order to maintain the high standard of environmental quality indicative of one of the few remaining wild rivers in the nation
 
(Prior Code, Ch. 300 §§ 601.03, 601.04)