Morning Corin - perhaps the naybers would prefer some rocks near the property line, and you could tell them that you are in process of developing 'a riffle/pool complex' which is an excellent aquatic habitat type.:-)
They already have rock on the lower part of the berm. And they're planning to build up the berm more on the upper side.
I'm thinking bamboo would make a nice accent plant.
Thing is, the previous nayber (Hyacinth) spent thousands of dollars landscaping the back yard and NEVER had the water problems these naybers do.
They've managed to let all the landscaping become overgrown and to kill all the grass.
Runnoff from my property didn't cause that.