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regulations and zoning ordinances. It is anticipated that all or nearly all flood plain regulations will re- sult from cooperative efforts and action by the local communities and the Resources Council. A study of the Iowa River and local tributaries at Iowa City was made by the Resources Council in 1960 and regulations based thereon were adopted by the City in 1962 as part of its comprehensive zoning ordinance. The ordinance permits only open-type uses in the channel and overbank areas needed for conveyance of a flood of selected mag- nitude and, in those flood plain areas not needed for conveyance, permits development consistent with the adjoining use district provided the area is filled 10 a specified elevation corresponding to the water surface elevation of the design flood. Flood plain information studies are completed or underway for several other areas of the state and il is anticipated thaI additional flood plain zoning ordinances will be approved and adopted as the technical bases therefor become available. Zoning Ordinance for Iowa City Adopted July 26,1962 ARTICLE VI. Yalley Otannel and Yalley Plain Zone Use Regulations Section I. Premises in the Valley Channel Zone shall not be filled with any material nor shall any structure be built that will cause an obstruction to the conveyance of J flow of 25,000 cfs in the Iowa River measured at the Iowa City Gaging Station. Section 2. Premises in the Valley Channel Zone shall be used for the following purposes only: I. Farms, truck gardens and nurseries, provided that no farm shall be operated publicly or privately for the feeding or disposal of garbage, rubbish, or offal. 2. Parks, playgrounds, golf courses, and commercial or private recreational areas. 3. Preserves and reservations. 4. Other similar open uses. Section 3. The Valley Plain Zone shall include prem- ises which are subject to inundation at or below an eleva- tion for a .particular area as shown on the zoning map of Iowa City, Iowa, said inundation being due to a flow of 25,000 cfs in the Iowa River measured at the Iowa City Gaging Station. Section 4. Premises in the Valley Plain Zone shall be used for the following purposes only: RIA RIA -t Controlled minimum pool EI. 637 22 I. For the uses and purposes set forth in Article VI, Section 2. 2. Premises in the Valley Plain Zone also may be used for the purposes specified for the residential, com- mercial, or industrial district in the particular zone. . . . 3. The uses permitted in Section 4, subsection 2 of this article are subject to the following: a. No building or structure or any portion thereof shall be erected unless the finished surface of the ground is higher than, or is raised by filling, to the elevation shown for the particular area on the zoning map. b. No first floor or a basement floor, nor a cellar floor or any dwelling or other building shall be con- structed at an elevation lower than the elevation shown for the particular area on the zoning map. Section 5. All regulations of the ordinance as regards performance standards, additional use regulations, height, yard, area, offstreet parking, accessory use and fe.nce regulations, shall apply to the particular zone of the VaHey Plain Zone as they are identified in Section 4, sub- section 2 of this Article. Flood-plain zoning permits. use of areas along the Iowa River. Truck gardening, playgrounds and the like are pennitted in the Valley Channel (Ve) area but no structures. Structures are permitted in the Valley Plain (VP) area but no basements or floors lower than the elevations shown. Normal low-water pool, formed by a dam at the iowa institUte of Hyurauiil.: Rtstalch, is at EI. 637. RIA denotes single-family homes; R3A, mu1 tiple housing. The "A" refers to lot size.