7 ▁to ▁comm emor ate ▁power ▁station ▁building ▁workers ▁who ▁had ▁died , ▁is ▁dedicated ▁to ▁the ▁patron ▁saint ▁of ▁mountain ▁engine ers , ▁and ▁serves ▁as ▁the ▁chap el ▁for ▁the ▁community . ▁ ▁Development ▁ ▁Sil vre tta ▁res er voir ▁ ▁The ▁Sil vet ta ▁res er voir ▁stands ▁at ▁exactly ▁the ▁same ▁elev ation ▁as ▁the ▁pass ▁and ▁is ▁the ▁highest ▁of ▁the ▁Ill ▁power ▁plant ▁group . ▁The ▁Ill ▁has ▁its ▁source ▁south ▁of ▁the ▁pass , ▁close ▁to ▁which ▁it ▁would ▁occasionally ▁change ▁its ▁path ▁and ▁instead ▁of ▁heading ▁west ▁towards ▁the ▁Rh ine , ▁it ▁would ▁sometimes ▁flow ▁east wards ▁into ▁the ▁Inn . ▁The ▁res er voir ▁brought ▁this ▁to ▁an ▁end ; ▁not ▁only ▁does ▁it ▁accum ulate ▁water ▁from ▁the ▁Ill , ▁but ▁its ▁two ▁d ams ▁reg ulate ▁the ▁direction ▁of ▁out flow . ▁ ▁Origin ally ▁constructed ▁sole ly ▁for ▁the ▁power ▁plant , ▁the ▁res er voir ▁has ▁developed ▁into ▁a ▁popular ▁tour ist ▁att raction ▁and ▁today ▁is ▁also ▁a ▁fish ing ▁destination . ▁A ▁feature ▁is ▁a ▁boat ▁tour ▁with ▁the ▁motor bo at ▁Sil vre tta , ▁Europe ' s ▁only ▁regular ▁motor bo at ▁transport ▁over ▁ 2 , 0 0 0 ▁m ▁above ▁sea ▁level . ▁This ▁feature ▁can ▁however ▁not ▁be ▁used ▁at ▁the ▁moment ▁as ▁the ▁service ▁was ▁dis cont in ued ▁due ▁to ▁a ▁technical ▁defect ▁in ▁the ▁ 2 0 1 1 ▁season , ▁and ▁since ▁then ▁has ▁not ▁been ▁re