OK, I'm slightly torn here (although not for the union). I think scouts doing projects are great, but I also think the city should be doing their own maintenance and not taking advantage of child labor. Of course, our cities would be better places if local communities chipped in to help maintain our facilities. Thoughts? I understand and don't support the union position here, but I know we have some experienced union folks in A2K land.
Let the troop clean and clear out the trail. That would cement emotional and community ties for that generation.
AS for further maintenance? Hopefully, the city gets the point that this public area needs to maintained. That is the further obligation of the city to carry on the trails up keep.
A possibility for a wonderful compromise is at hand. The city should provide tools and supervision. On an annual level (or even a greater commitment), the Boy Scout Troop could lend a hand in maintaining the land but at a volunteer level. It should be considered as an internship or an apprenticeship where the volunteers learn horticulture, gardening, landscape engineering, or whatever practical science is prevalent in the practice of maintaining the public trails.