My parents planted a willow tree right above the waterline. Within ten years, its roots were breaking down the waterline. It seems these bushes aren't as aggressive.
"The very large tree form species willows have not been recommended for home landscaping due to their invasive, water seeking roots and weak wood. The root systems, which are excellent at seeking out moisture, can be particularly damaging to septic systems. The root systems of the dappled willow and dwarf shrubs, although well developed at maturity, do not compare to the size of a full size willow tree. The tree form ‘Hakuro-nishiki’ has been grafted to the trunk of another willow variety, and therefore will have a larger, more extensive root system than the shrub. Although there is little information available regarding damaging roots from the trunks used for grafting, these grafted tree forms were developed specifically for use in small home landscapes. It is highly doubtful that a trunk would ever be used from one of the very large willow trees that can be so damaging to septic tanks. Willow roots in general grow very fast, just like the willow plant. They can grow several feet per year and will usually spread equal to their height (a mature ‘Hakuro Nishiki’ may reach about 10 feet). In general, willow roots are invasive and can exceed the width of the tree’s branches as much as 3 to 4 times. But again, that refers to the large tree form willow. If you have a septic system and are concerned, why stress? Plant your grafted tree in a very large container, or at least at a great distance from the tank and pipes."
https://www.midwestgardentips.com/pl...dappled-willow
I love the idea of dappled willow's red stems in winter. However, a berry producing bush for birds and wildlife might be nice too. If hollies, Red-osier dogwood, (any Cornus species) or cranberry bushes grow in your zone, it might be a nice alternative.