▁the ▁West ▁Short ▁P ine ▁Hills ▁area . ▁ ▁The ▁listing ▁included ▁ 1 2 ▁contrib uting ▁buildings ▁and ▁two ▁contrib uting ▁structures . ▁The ▁oldest ▁building , ▁a ▁log ▁structure , ▁is ▁believed ▁to ▁have ▁been ▁built ▁in ▁ 1 8 8 3 . ▁ ▁References ▁ ▁Category : R an ches ▁on ▁the ▁National ▁Register ▁of ▁Historic ▁Places ▁in ▁South ▁Dak ota ▁Category : Log ▁buildings ▁and ▁structures ▁Category : National ▁Register ▁of ▁Historic ▁Places ▁in ▁Hard ing ▁County , ▁South ▁Dak ota ▁Category : Build ings ▁and ▁structures ▁completed ▁in ▁ 1 8 8 3 <0x0A> </s> ▁A ▁door ▁is ▁a ▁h ing ed ▁or ▁otherwise ▁mov able ▁bar rier ▁that ▁allows ▁ing ress ▁and ▁e gress ▁into ▁an ▁en closure . ▁The ▁opening ▁in ▁the ▁wall ▁can ▁be ▁referred ▁to ▁as ▁a ▁" portal ". ▁A ▁door ' s ▁essential ▁and ▁primary ▁purpose ▁is ▁to ▁provide ▁security ▁by ▁cont rolling ▁access ▁to ▁the ▁portal ▁( door way ). ▁Convention ally , ▁it ▁is ▁a ▁panel ▁that ▁fits ▁into ▁the ▁portal ▁of ▁a ▁building , ▁room , ▁or ▁vehicle . ▁Do ors ▁are ▁generally ▁made ▁of ▁a ▁material ▁su ited ▁to ▁the ▁task ▁of ▁which ▁it ▁is ▁to ▁perform . ▁Do ors ▁are ▁commonly ▁attached ▁by ▁h ing es ▁within ▁the ▁portal ▁but ▁can ▁be ▁moved ▁by ▁other ▁means ▁such ▁as ▁sl ides ▁or ▁counter bal ancing . ▁ ▁The ▁door ▁may ▁be ▁moved ▁in ▁various ▁ways ▁( at ▁angles ▁away ▁from ▁the ▁portal , ▁by ▁sl iding ▁on ▁a