▁and ▁their ▁surr ound ings . ▁Ind ividual ▁items ▁such ▁as ▁garbage ▁sc at ters ▁and ▁p its , ▁construction ▁techniques ▁and ▁materials ▁of ▁the ▁cab ins ▁and ▁related ▁structures , ▁well s , ▁long ▁drop ▁to ile ts ▁etc , ▁possess ▁scientific ▁and ▁research ▁potential . ▁ ▁The ▁overall ▁integrity ▁of ▁the ▁cabin ▁communities ▁remains ▁high . ▁Between ▁ 1 9 5 3 , ▁when ▁cabin ▁numbers ▁were ▁at ▁their ▁highest , ▁and ▁ 1 9 9 0 ▁when ▁a ▁mor ator ium ▁on ▁cabin ▁remov als ▁was ▁inst ig ated ▁by ▁the ▁then ▁National ▁Park s ▁and ▁Wild life ▁Service ▁( NP WS ), ▁approximately ▁ 5 5 ▁cab ins ▁were ▁removed . ▁These ▁losses ▁have ▁not ▁impact ed ▁the ▁overall ▁integrity ▁of ▁the ▁collect ive ▁size ▁or ▁" crit ical ▁mass " ▁of ▁the ▁groups . ▁Currently , ▁one ▁cabin ▁at ▁Era ▁is ▁a ▁" st abil ised ▁ru in " ▁due ▁to ▁a ▁dispute ▁between ▁its ▁own ers ▁and ▁O E H ▁which ▁has ▁not ▁allowed ▁the ▁building ▁to ▁be ▁rep a ired ▁or ▁occupied . ▁Two ▁cab ins ▁at ▁Burn ing ▁Pal ms ▁are ▁required ▁to ▁be ▁removed ▁by ▁the ▁O E H ▁due ▁to ▁ge ote chn ical ▁issues . ▁The ▁Burn ing ▁Pal ms ▁community ▁wishes ▁to ▁re loc ate ▁or ▁re build ▁these ▁cab ins ▁in ▁another ▁environment ally ▁appropriate ▁site ; ▁however ▁O E H ▁is ▁considering ▁whether ▁this ▁is ▁appropriate . ▁ ▁Mod ifications ▁and ▁dates ▁ ▁Prior ▁to ▁the ▁original ▁Perm iss