G ais – App enz ell – Alt st ätten - B ahn ▁( S GA ). ▁ ▁The ▁App enz eller ▁Bah nen ▁company ▁was ▁formed ▁in ▁ 1 9 8 8 , ▁with ▁the ▁mer ger ▁of ▁the ▁App enz eller bahn ▁and ▁the ▁St . ▁G allen – G ais – App enz ell – Alt st ätten - B ahn . ▁In ▁ 2 0 0 6 , ▁the ▁App enz eller ▁Bah nen ▁company ▁merged ▁with ▁the ▁R or sch ach – He iden - B erg bahn , ▁the ▁R he ine ck – W al zen hausen - B erg bahn ▁and ▁the ▁Tro gener bahn ▁companies . ▁In ▁legal ▁terms , ▁this ▁mer ger ▁took ▁the ▁form ▁of ▁the ▁App enz eller ▁Bah nen ▁company ▁acqu iring ▁the ▁other ▁companies . ▁ ▁Operation ▁▁ ▁Today , ▁the ▁company ▁oper ates ▁the ▁following ▁railway ▁lines : ▁▁ ▁App enz ell – St . ▁G allen – T ro gen ▁ ▁G oss au – App enz ell – W asser au en ▁ ▁Alt sta etten – G ais ▁ ▁R he ine ck – W al zen hausen ▁ ▁R or sch ach – He iden ▁ ▁The ▁St . ▁G allen – G ais – App enz ell , ▁G oss au – App enz ell – W asser au en ▁and ▁Alt st ätten – G ais ▁lines ▁form ▁a ▁connected ▁network ▁of ▁ ▁lines , ▁all ▁elect r ified ▁at ▁ 1