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Planning&Zoning Board <br /> May 13, 1998 <br /> Page 3 <br /> Mr. Dunn noted that most homes in this area are zoned R-XI. Mr. Sampair indicated that <br /> Collova Builders can meet the R-X1 requirements. He believes that Collova Builders has <br /> done a good job meeting all the requirements the Planning and Zoning Board has <br /> specified. He thanked Ms. Wyland and the neighborhood for all of their help and input. <br /> Mr. Ahrens, City Engineer, asked the project engineer to address the drainage issues. <br /> Roger Nelson, project engineer, referred to a map that specified the site location. He <br /> stated that the existing streets were in good shape, having no curbs or ditches. He <br /> indicated that drainage is currently a problem, especially in the spring. He is proposing a <br /> natural high point on Linda Avenue and improving the ditch by making it deeper, going <br /> west to south with a culvert under the driveways. <br /> Chair Schaps asked if that was the present flow of the drainage. Mr. Nelson stated that <br /> basically it was, with overflow occurring in the spring. The internal drainage would be <br /> improved by enlarging the pond and creating a new pond to accommodate increased run- <br /> off. <br /> Mr. Johnson asked where the water would flow after it left the site. Mr. Nelson indicated <br /> that the overflow would flow along a ditch running east and trail southward with a <br /> culvert. It would connect to a large basin under Lorraine Avenue to the west and then <br /> into a County ditch and end up in Baldwin Lake. <br /> Mr. Johnson asked where flooding problems were most likely to occur. Mr. Nelson <br /> stated that flooding could be a problem in the intersection, but would not affect any <br /> homes. He noted that the one home next to the pond currently has a problem with water <br /> on the lawn. <br /> Mr. Corson questioned when the flooding would occur. Mr. Nelson said that anything <br /> beyond a 100 year storm would flood. <br /> Mr. Trehus asked how much additional run-off will be generated due to the new homes. <br /> Mr. Nelson explained that approximately 6,000 cubic feet of additional run-off would <br /> occur. Mr. Trehus inquired about creating a storage area on site. Mr. Nelson stated they <br /> have provided for on-site ponding. <br /> Mr. Schilling asked if the storage area would be designed only to handle the additional <br /> run-off or much more flooding. Mr. Nelson indicated it would be designed for only the <br /> additional run-off, they would not make it any larger than necessary. <br /> Mr. Ahrens stated that the improvements Mr. Nelson described would improve the <br /> current drainage on the streets. He is concerned about the additional run-off that would <br /> be generated from more housing. He would like to see the evidence that there would be <br /> no net increase of run-off. <br />