08-10-2022 Workshop Minutes - Laserfiche WebLink

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WORKSHOP MINUTES CITY COUNCIL AUGUST 10, 2022 111C Clty Ad1111111stiatol stated that !t was discovered there is a iJ-inch pipe connecting the basin to the Gervais Mill pond. He explained that the home styles planned for the development are mostly rambler style construction between 2,800-3,300 finished square feet. He noted that the target price point according to the developer would be between $550,000-$750,000. The City Engineer stated there are three criteria to review a project's runoff. rate, quality and volume. He noted that a fourth criteria is flood zone and flood management. He explained that "rate" means that a project cannot release water faster than the site already does. He noted that with the discovery of the culvert, the site does technically have water leaving the site. He noted that with the type of vegetation that is in the basin area, it is obvious that water is not sitting in the basin for long and ,quickly leaves the site. He explained that "water quality" means that the stormwater must first infiltrate in order to clean it before it leaves. He stated that "volume management" means controlling the amount of water leaving the site. Mayor Keis noted that soil borings will be needed before final review is done. The City Engineer explained "flood zone" and stated this could be the most important piece of a review. He reviewed a site, map showing that the north portion of the site is a designated flood plain, and noted that flood plains cannot be filled since the space is needed for storage during large rain events. He noted the site must continue to have the same amount of flood storage volume after development. He stated that the Watershed District sets the rules and reviews the design. Fischer asked if there is a modeling example that could be done to show the neighbors, especially the properties on the east side of Edgerton and Keller Parkway. Fischer asked about the road grade where the new cul-de-sac meets Edgerton Street, and is concerned about vehicles sliding onto Edgerton during the winter. The City Engineer stated that the first 75 feet of the street in from Edgerton Street is at a 2.5% grade, which is not too steep. He explained that the street grade will be at 7.5% at the curve which meets the City's requirement and stated that a guard rail would be installed along the outside of the curve for additional safety. Fischer asked for a description on what the elevation of the new homes will be if a person was standing in the Schletty Drive cul-de-sac and looking north and east. The City Engineer showed various elevation examples. He explained that the new road and garage floors are lower than the current grade level of Schletty Drive, and there will be retaining walls in the backyards to make up for the grade difference. Fischer asked who would be responsible for the long-term maintenance of the retaining walls. The City Engineer stated there would likely need to be a homeowner's association that would be responsible for the maintenance of the walls. He stated the pond would become a city asset and be maintained by the city. He noted the final details are typically worked out and decided on during the final plat process. McGraw asked if the height of the retaining walls is a concern. The City Engineer stated that they are on the tall side, but taller walls are becoming more common in developments. Miller stated that she is concerned about the water and wants to make sure that there will not be any water in people's basements due to this development. McGraw asked what the current land grade 2