7.3. SR 10-17-2011 - Laserfiche WebLink

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(4) Placement or storage of fill or similar material. Section 20. That Section 30-1912 (d) of the City of Elk River Code of Ordinances, titled Accessory structures, to replace subsection 5 c to read as follows: 1. The structure must be adequately anchored to prevent flotation, collapse or lateral movement of the structure and shall be designed to equalize hydrostatic flood forces on exterior walls 2. Any mechanical and utility equipment in a structure must be elevated to or above the regulatory flood protection elevation or properly flood_proofed: and: 3 To allow for the equalization of hydrostatic pressure there must be a minimum of tti-o "automatic" openings in the outside walls of the structure having a total net area of not less than one square inch for every square foot of enclosed area subject to flooding. There must be openings on at least two sides of the structure and the bottom of all openings must be no higher than one foot above the lowest adjacent grade to the structure Lasing human intervention to open a garage door prior to flooding will not satis T this requirement for automatic openings. Section 21. That Section 30-1913 (e) 1 b 1 of the City of Elk River Code of Ordinances, titled Flood fringe district, standards for above grade enclosed areas shall be amended to add to read as follows: 1. The minimum area of openings in the walls where internal flooding is to be used as a flood_proofing technique. , .There shall be a minimum of t~vo automatic openings on at least t~vo sides of the stricture and the bottom of all openings shall be no higher than one-foot above grade The automatic openings shall have a minimum net area of not less than one square inch for ever~~ square foot of enclosed area subject to flooding unless a registered professional engineer or architect certifies that a smaller net area would suffice. The automatic o8penings may be equipped with screens, louvers, valves, or other coverings or devices, provided that they permit the automatic entry and exit of floodwaters without any form of human intervention. Section 22. That Section 30-1913 (e) 4. of the City of Elk River Code of Ordinances, titled Flood fringe district, Storage of Fill or similar material shall be amended to read as follows: (4) Storage of fill or similar material. When at any one time more than 1,000 cubic yards of fill or other similar material is located on a parcel for such activities as on-site storage, landscaping, sand and gravel operations, landfills, roads, dredge spoil disposal or construction of flood control works, an erosion/sedimentation control plan must be submitted unless the city is enforcing astate-approved shoreland management ordinance. r i. ..~. ..~.. ~_ ..a ..i... ,.i..~a ..a; i ~,... __ ..~,.,...~ :~..__ a_~a.. °11 " ~ ~ y ~r~ .The plan must be prepared and certified by a registered professional engineer or other qualified individual acceptable to the City Council. The plan may incorporate alternative procedures for removal of the material from the floodplain if adequate flood warning time exists.