About disappeared pokestops at 2018

加茂市案内看板
https://intel.ingress.com/intel?pll=37.658629,139.049266&z=18
加茂歴史の小径 三国街道山通り
https://intel.ingress.com/intel?pll=37.658854,139.052148&z=18
幼年の時間
https://intel.ingress.com/intel?pll=37.659752,139.052211&z=18=
I remember,these portals ware pokestops once,but only pokestops ware disappeared at Oct 2018 at the same time,and still exist portals.
Are these portals able to become pokestops again? Or these are "dead pokestops" forever? please investigate.