com / pop ups / 1 5 ▁ ▁Category : The at res ▁in ▁Chicago <0x0A> </s> ▁Jord ans ▁Mine ▁is ▁a ▁Port land ▁Stone ▁mine ▁on ▁Port land . ▁In ▁ 2 0 1 6 ▁it ▁was ▁the ▁biggest ▁mine ▁for ▁this ▁stone , ▁at ▁some ▁places ▁ ▁high . ▁It ▁had ▁previously ▁been ▁a ▁quar ry ▁site ▁since ▁the ▁ 1 9 th ▁century . ▁ ▁Following ▁the ▁successful ▁planning ▁application ▁and ▁the ▁signing ▁of ▁the ▁Un il ater al ▁Und ert aking ▁the ▁min ing ▁began ▁in ▁ 2 0 0 8 ▁and ▁became ▁ 1 0 0 % ▁min ing ▁in ▁early ▁ 2 0 1 6 . ▁There ▁are ▁several ▁miles ▁of ▁t unn els ▁and ▁this ▁network ▁dram atically ▁reduces ▁the ▁impact ▁on ▁the ▁environment ▁and ▁local ▁residence ▁ ▁M ining ▁minim ises ▁the ▁impact ▁on ▁the ▁conservation ▁area ▁and ▁on ▁the ▁listed ▁buildings . ▁The ▁access ▁road ▁is ▁situated ▁within ▁an ▁existing ▁quar ry ▁and ▁landscape ▁and ▁away ▁from ▁the ▁sensitive ▁properties ▁so ▁as ▁not ▁to ▁affect ▁the ▁settings ▁of ▁the ▁listed ▁buildings ▁or ▁the ▁conservation ▁area . ▁The ▁Portal ▁location ▁is ▁in ▁the ▁base ▁of ▁the ▁existing ▁quar ry ▁so ▁it ▁would ▁not ▁be ▁visible ▁other ▁than ▁by ▁looking ▁over ▁the ▁quar ry ▁edge . ▁ ▁Jord ans ▁Mine ▁produces ▁Jord ans ▁Base bed , ▁Jord ans ▁Whit bed , ▁F ancy ▁Beach ▁Whit bed , ▁Gro ve ▁Whit bed , ▁Jord ans ▁Ro ach , ▁Ost rea ▁P atch ▁Re ef ▁Whit bed ▁and