Agenda Packets - 2013/11/25 - Laserfiche WebLink

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3. The properties on the west side of Sunnyside road are at least 3 to 4 feet higher. Also the storm water flows from north to south through the street. As seen in the SUIP_2014_Area G infiltration feature map, there is only one proposed feature (#basin 9) before our home on the north of the street to catch that significant quantity of storm water from the highest point on the north side. The proposed basin in front of our house, which appears to cover the entire length of the property, would result in a large amount of standing water on the west side of the property for long duration. This would cause more water to infiltrate in the horizontal direction towards the property from the west side, adding to the already existing heavy loads from all other directions. (see picture 3 below) Picture 3 This not only adds to the water load towards the home, but could result in overflow onto the low lying south side of the home, because of the current grading from the south and west towards the home on the south side. 4. The sump pump outflow will have nowhere to go when the area around the home is saturated by water that is collected by the proposed basin on the west side as well as the current issue of flooding on the east side. This we fear could lead to significant property damage in the future. 5. if one looks at these individual issues, it may not be obvious that the new basin would significantly imperil the home. But looking at it holistically, it may not be difficult to see that the additional load from the west could significantly alter the current hydro -equilibrium that keeps the home dry. The existing flooding issue on the East side, the heightened ground on the south side and the flow of water from the north already makes the property prone to flooding. Adding a collection basin on the west side will result in horizontal water flow towards the home and further hamper water from flowing away from the property. 3