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Regular City Council Meeting Monday, September 12, 2016 Page 27 probably require grading to stay two feet outside of the defined 957 contour so it should not impact the storage of the existing floodway that is being witnessed now. Councilmember McGehee asked whether Minnesota has experienced two 1,000- year floods this summer. Mr. Culver stated he does not know the size of two 1,000-year floods. Councilmember McGehee stated she knows there has been one so it is not out of the question. Mr. Culver agreed it is not out of the question and he would not counter there have been some significant rainfall events. Councilmember McGehee noted that if less than 30% of the lot is impervious sur- face, even the BMP for Basin 1 is not required by Code. She asked under what circumstances the two other BMPs options would come into play. Mr. Culver stated the proposal, partly through negotiations, is to install the BMP with the recognition they may not be required by Code or City Policy for this proposal and to do that is an extra measure in recognition to mitigate and slow down the runoff. Councilmember McGehee asked whether Condition d states that any grading has to be outside of the 957-958 elevation by two feet and that all of buried storage Option 1, buried storage Option 2, Basin 2, and Basin 1 has to be installed in ad- vance of grading. Mayor Roe opined it does not and pointed out his understanding that buried stor- age Option 1 is an alternate to Basin 1. It is one or the other and likewise, buried storage Option 2 is an alternate to Basin 2. Mayor Roe stated his understanding that Option 1 deals with the new lot and potential impervious surface added as a result of developing that lot. Option 2 is additional and not necessarily part of the adding development to that new lot. Mr. Freihammer stated his understanding the basins would address the new impervious surfaces. Mr. Koland stated it has already been established the City Council did not ap- prove his previous application without consideration of the drainage so he provid- ed options for the City Council to leverage with approval consideration. The ba- sins proposed are concepts, as required by the planning phase, and the thought process was to take all, if not more, of the additional drainage caused by any pro- posed development in the subdivision. Mr. Koland stated it does not make a dif- ference to him whether Basin 2 or Basin 1 and he is willing to work with staff to establish that or the Council could set ground rules if it wants the BMP located on the subdivided lot. Mr. Koland stated it does not matter to him where the water comes from as long as 1,000 gallons gets impounded as offset for the additional drainage caused by the additional development. Mayor Roe asked whether Basin 1 and storage 1 options handle just the new lot and Basin 2 is not, or if it is a combination of all four options having to be done. Mr. Koland stated he would definitely not have to do all four options to address