I spent this past Thursday and Friday treating the invasive at lagoon park. I will finish up a few remaining patches this coming Monday. If you get a chance stop by and take a look. The view shed has opened up considerably especially the view of the water.
Keep in mind that this is a work in progress. You can't make an omelet without breaking an egg. Remember it is necessary to kill all of the invasives to make room for the native plants that will replace them.
Next spring when the remaining native plants leaf out the new foliage will obscure much of the brush. The plan is also to replant with native trees and shrubs especially where there was only buckthorn. Also after about a year the majority of the small twigs and small branches will become brittle and break up, the brush will gradually compact, naturally decompose and over time disappear.
I took a series of pictures to show the changes taking place. The first image is of the trail will buckthorn still in leaf , the second one is of the trail before treatment and the third is after treatment.