Yes, Willow is a possibility further down the land, and thanks both for the idea.
The thing is, near the entrance and gates to the farm, the stream is very very pretty, and has little mini waterfalls with us being on the mountainside, and edges our land from the road up the mountain to the windfarm.
Rather than block out the stream from view of the road and visitors, I wanted to make a pretty but low maintenance feature of it.
Horsetail and bramble take over all the time, which edge both sides of the very pretty lane, but I wanted it to look a little more, erh, polished, just for about 50 feet in both directions from my gate entrance (which is a bridge over the same stream).