1998-07-22 Packet - Laserfiche WebLink

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DRAFT Revised July 7, 1998 be set back double the normal ordinary high water level setback or be substantially screened from view from the water by vegetation or topography, assuming summer, leaf -on conditions. 5.22 Design Criteria For Structures. A. High Water Elevations. Structures must be placed in accordance with any floodplain regulations applicable to the site. Where these controls do not exist, the elevation to which the lowest floor, including basement, is placed or flood - proofed must be determined as follows: (1) for lakes, by placing the lowest floor at a level at least three feet above the highest known water level, or three feet above the ordinary high water level, whichever is higher; (2) for rivers and streams, by placing the lowest floor at least three feet above the flood of record, if data are available. If data are not available, by placing the lowest floor at least three feet above the ordinary high water level, or by conducting a technical evaluation to determine effects of proposed construction upon flood stages and flood flows and to establish a flood protection elevation. Under all three approaches, technical evaluations must be done by a qualified engineer or hydrologist consistent with parts 6120.5000 to 6120.6200 governing the management of flood plain areas. If more than one approach is used, the highest flood protection elevation determined must be used for placing structures and other facilities; and (3) water- oriented accessory structures may have the lowest floor placed lower than the elevation determined in this item if the structure is constructed of flood- resistant materials to the elevation, electrical and mechanical equipment is placed above the elevation and, if long duration flooding is anticipated, the structure is built to withstand ice action and wind - driven waves and debris. B. Water- oriented Accessory Structures. Each lot may have one water- oriented accessory structure not meeting the normal structure setback in Section 5.21 of this ordinance i,f this water - oriented accessory structure complies with the following provisions: (1) the structure or facility must not exceed ten feet in height, exclusive of safety rails, and cannot occupy an area greater than 25D square feet. Detached decks must not exceed eight feet above grade at any point: (2) the setback of the structure or facility from the ordinary high water level must be at least ten feet: (3) the structure or facility must he treated to reduce visibility as viewed from public waters and adjacent shorelands by vegetation, topography, increased setbacks or color, assuming summer, leaf -on conditions: SMO- 260.081 -24- 260 -081-10