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Home My WebLink About2021.07.22_1411 Crystal Lake Stream Margin Exemption Review_EngineeringStream Margin Exemption Review | 1411 Crystal Lake Road | LPA-21-053 | 07/22/21 Engineering Department Comments General Comments  What special design considerations have been taken to ensure the pool is not impacted by fluctuating groundwater levels. What is the groundwater depth in this area?  How is stormwater runoff accommodated so that the pool doesn’t overtop to the river? What happens during a larger storm event? Is there a drain to prevent overtopping and where does the drain connect to?  How will the pool and the rock wall be constructed without impacting the 15’ setback? Provide the means and methods for installation.  When the building permit is submitted, clearly show how any leaks to the pillow bladder wouldn’t drain to the river but would drain back to the pool. Provide spot elevations/contours/drainage arrows to prove this will not drain to the river.  Will this pool have a hard cover? If so, where does the runoff for this new impervious area drain? Is there capacity in the property’s stormwater system for WQCV treatment and/or detention if required? If there is no hard cover, how is drainage accommodated in the summer and the winter?