09/13/2023 P&Z Combined Packet - Laserfiche WebLink

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4 modeling and water quality calculations in the stormwater report, this project meets City requirements for rate control and water quality treatment. Pre- and Post- Development Discharge Rates (cfs) Condition 2-Year 10-Year 100-Year 10-Day Snowmelt Existing 18.98 30.11 58.70 Not provided Proposed 17.22 26.86 51.29 Not provided Public Utilities Public utilities exist along CR 84 (Otter Lake Road). Water and sanitary sewer are not impacted by the outdoor storage area. Tree Preservation and Mitigation Standards A tree survey was performed that identified: Of the 210 trees surveyed, 92 will be removed. 61 of these trees are in the Basic Use Area (within the outdoor storage area or within 20 feet of it). 31 of the tree removals that are located near the proposed stormwater basin will require mitigation trees to be planted. 32 mitigation trees are required because one of the trees is large enough to require two trees planted in its place. There are 18 trees that will be preserved near the disturbance area. These trees will provide 43 trees worth of existing tree credit. There are numerous ash trees on the site that have been infested with Emerald ash borer. The following emerald ash borer infested trees must be removed: • 11 trees along Otter Lake Road east of the sidewalk. • Trees 208-215 in the northeast corner of the property. These trees have the potential to impact public safety and cause off-site property damage. All other ash trees on the site that have not been treated to prevent emerald ash borer infestation should be removed as well, but their removal will not be a requirement of this project. Tree Preservation and Mitigation Standards have been met. Total Trees Surveyed 210 Total Trees Removed 92 Trees Removed in Basic Use Area 61 Mitigation Trees Required 32