All developments that include stormwater retention or detention facilities shall provide landscaping around the perimeter of such facility generally above high water level. Only plants that are adapted to temporary flooding may be planted below high water level. Such landscaping shall be comprised of a minimum of twenty (20) plant units for every one hundred (100) linear feet of perimeter, or part thereof, as measured at high water level. Where located adjacent to a major arterial or collector road as designated in the village of Shorewood comprehensive plan, an irrigation system shall be included. (Ord. 15-1766, 2-10-2015)