A stormwater pond does more than just sit on your property and hold water. Its slopes play a real role in how well the whole system works. Left unmowed, these slopes can quickly turn into a tangle of weeds, brush and small trees. Many property managers and HOAs ask the same question. How often do these slopes actually need mowing? Getting a clear stormwater management solutions plan in place from the start makes this much easier to answer, since mowing works best as part of a