The I-1 District is intended and designed to provide for increased flexibility in the location of certain manufacturing and industrial uses while maintaining protection for nearby residential districts. It allows selected industries of a non- nuisance character to locate in areas near residential uses. The I-1 District is characterized by large lots with landscaped ground and ample provision for off-street parking and loading spaces and structures generally one or two (2) stories in height. No use shall be permitted in the I-1 District except the following:

Uses permitted in the B-3 District, except transient merchandising.

Advertising novelty manufacturers, assemblers or wholesalers.

Assembly of small electrical appliances, small industrial and electrical instruments and devices, radios, phonographs and television sets, including the manufacture of small accessory parts, such as coils, condensers, transformers, crystal- holders and small products.

Commercial trade schools and business colleges including dormitory facilities.

Compounding and packaging of drugs, pharmaceuticals, cosmetics, perfumes and toiletries.

Employee cafeterias or other food concessions in conjunction with the uses permitted in this District.

Laboratories, research, experimental and testing.

Manufacture, assembly, compounding, processing, packaging or other comparable treatment of the following:

Assembly of products from the following previously prepared materials: Bone, canvas, cellophane, cloth, cork, rope, twine, feather, felt, fibre, fur, glass, hair, horn, leather, paper, cardboard, plastics, natural and synthetic rubber, precious or semi-precious,metals or stones, shells, textiles, tobacco, wax, wood, yarns, light metal mesh, pipe, rods or wire.

Bakery goods, candy and food products.

Cameras and other photographic equipment.

Electric and neon signs and outdoor advertising signs.

Medical, dental and drafting instruments.

Mobile homes, camping trailers and prefabricated components for building construction.

Musical instruments, toys, novelties and rubber and metal hand stamps.

Pottery and other ceramic products, using only previous pulverized clay, and kilns fired only by electricity or gas.

Small precision instruments, such as barometers, clocks, watches and compasses.

Motor freight terminals.

Office buildings.

Printing, lithographing, or film processing plants.

Processing, assembly, handling or storage of plastic materials.

Tiny Homes, if approved by special use, provided they comply with 10-22-11.

Warehouses for storage of merchandise or material in connection with the uses permitted in this District. (Ord. B-39, 1969; amd. Ord. C-243, 7-5-1995; Ord. D-085, 3-1-2022)

   A.   All business, production, servicing and processing shall take place within completely enclosed buildings unless otherwise specified. All storage in this District shall be enclosed with walls or fences (including solid doors or gates thereto) at least eight feet (8') high, but in no case lower in height than the enclosed storage and suitably landscaped.

However, open off-street loading facilities and open off- street parking of motor vehicles may be unenclosed throughout the District, except for such screening of parking and loading facilities as may be required under the provisions of Chapter 19 of this Title.

   B.   Sign regulations and parking regulations shall be as specified in Chapters 18 and 19, respectively of this Title. (Ord. B-39, 1969)

No building shall hereafter be erected or structurally altered unless the following yards are provided and maintained in connection with such building:

   A.   Front Yard: On every zoning lot a front yard of not less than twenty five feet (25') in depth shall be provided. However, where lots within the same block and comprising forty percent (40%) of the frontage on the same street are already developed on the effective date of this Title with front yards with an average depth of less than twenty five feet (25'), then such average depth shall be the required front yard depth for such frontage in said block.

   B.   Side Yards: On every zoning lot a side yard shall be provided along each side lot line. Each side yard shall be not less in width than ten percent (10%) of the lot width, but need not exceed twenty feet (20') in width. (Ord. B-39, 1969)

Any use established hereafter in any I-1 District must be so operated as to comply with the following requirements:

   A.   No use shall be established or maintained which by reason of its nature or manner of operation is or may become hazardous, noxious, or offensive owing to the emission of odor, dust, smoke, cinders, gas fumes, noise, vibrations, refuse matters or water-carried waste.

   B.   No use shall be permitted which is in conflict with the provisions of this Code, or the laws of the State of Iowa, defining and regulating nuisances 1 .

   C.   In carrying on any use in this District the best practical means known for the disposal of refuse matter or water-carried waste and the abatement of obnoxious or offensive odor, dust, smoke, gas, noise or similar offensive characteristics must be employed. (Ord. B-39, 1969)

   D.   Vibration: Any process or equipment which produces intense earth-shaking vibrations, such as are created by heavy drop forges or heavy hydraulic surges, shall be set back at least five hundred feet (500') from the property boundaries on all sides, except for a property line adjoining an I-2 District, where such setback shall not be mandatory. However, in no case shall such vibrations be allowed to create a public nuisance or hazard beyond the property boundaries.

   E.   Glare or Heat: Any operation producing intense glare or heat shall be performed within a completely enclosed building or an approved incinerator and effectively screened in such a manner as not to create a public nuisance or hazard beyond the property boundaries. (Ord. B-39, 1969; 1993 Code)

   F.   Fire and Explosive Hazards: Fire and explosive hazards shall be controlled as follows:

      1.   Activities involving the storage or manufacture of materials or products which decompose by detonation are not permitted in the I-1 Districts.

      2.   The storage, utilization or manufacture of materials ranging from incombustible to moderate burning as determined by the Zoning Administrator is permitted.

      3.   Storage, utilization or manufacture of materials or products ranging from free or active burning to intense burning as determined by the Zoning Administrator is permitted under the following conditions:

         a.   All indoor storage and manufacture of such materials or products shall be within completely enclosed buildings or structures having incombustible exterior walls or fire-resistant component walls; and

         b.   All such buildings or structures shall be set back at least forty feet (40') from property boundaries, or in lieu thereof, shall be protected throughout by an automatic sprinkler system complying with standards for the installation prescribed by the National Fire Protection Association.

         c.   Outside storage of such material shall be allowed when of an approved type in accordance with the standards and regulations of the City and the National Fire Protection Association.

      4.   Materials or products which produce flammable or explosive vapors or gases under ordinary weather temperatures shall not be permitted in this District, with the exception of the following, which are permitted:

         a.   Materials required for emergency or standby equipment.

         b.   Materials used in secondary processes which are auxiliary to a principal operation such as paint spraying of finished products; and

         c.   Flammable liquids and oils stored, sold and used in conjunction with the operation of an automobile service station and customarily required or used in such operations. (Ord. B-39, 1969)