It is almost certainly your property subj to a gas/power row, but who cares who owns it-are you going to shoot or take trespassers to small claims court? Sorry to say, but it will get worse before it gets better. I'd wait until landscappers/fence/etc. are done and deal with pool Co or owners then. Strong chance anything you repair or fortify now will be disturbed again just because of the nature of construction. Same just happened to me. Mud from ruts and sand/gravel from concrete and landscaping ran down alley and past my house down street curb for months, but at completion of pool SOMEONE repaired the ruts and cleaned up the dirt and debris (workers food wrappers, etc. too). I was eventually going to ask my neighbor to fix, but didn't even have the chance. You could use the city of Dallas app to report the shit out of every little violation of the 7am7pm noise rule, alley blocking, construction fence problems, etc. if you want to I guess tho.