we don't have LPN's in labor and delivery and we only have 4.5 in postpartum/gyn. There are none in nursery and only 1 left on peds, none in ICU. Medical, tele and surgical have a few more but I think their jobs won't be posted if any of them leave. I've learned lots from the LPNs I've worked with but sometimes there is a strain on the workload just because there are things LPN's can't do d/t nurse practice acts.
When I was on peds, only RN's could start IV's and at night it was me and an LPN. RN are still the only ones to push meds or draw labs from central lines and there are more and more patients with lines. We have lots of IV pushes and if there are 18 patients with me and a LPN I can really get tied up with those pushes.
I don't know that there is a solution. Sorry you have to worry about your job as I've said I've learned lots from LPN's.