CL65 MAKES APCH TO OPPOSITE RWY THAN ILS WITH SAME FREQ AT EVV.

Narrative

DUE TO TSTMS IN THE AREA OUR FLT TO EVANSVILLE WAS DELAYED. WE DEPARTED APPROX 3.5 HRS LATE; WHICH PUT OUR ARR TIME INTO EVV AFTER THE TWR CLOSED. BASED ON THE CURRENT WX THAT WE HAD FROM ZID AND THE WX ON OUR DISPATCH RELEASE (WHICH WAS 40 MINS OLD) WE WERE VECTORED FOR RWY 22 AT EVV. THE CAPT (PNF) HAD CONFIRMED THAT THE LOC HAD BEEN IDENTED (PER THE APCH CHKLIST) BUT THAT THE END OF THE IDENT SOUNDED OBSCURED. AFTER WE INTERCEPTED THE LOC AND GS; I NOTICED THAT THE GS SEEMED TO BE A STEEPER ANGLE THAN NORMAL. I ASKED THE CAPT IF THE GS WAS 3.5 DEGS. I DIDN'T RECEIVE AN ANSWER. AS WE APCHED THE RWY IT WAS BECOMING APPARENT THAT THE GS MUST BE INOP AND THAT WE WERE MUCH HIGHER THAN WE WERE SUPPOSED TO BE. WE DECIDED TO GO AROUND AND TRY THE LNDG AGAIN; BUT WE WOULD DISREGARD THE GS. IT SHOULD BE NOTED THAT RWY 22 HAS NO VASI OR PAPI. WE DECIDED TO BEGIN THE DSCNT AT THE LOM AT THE RECOMMENDED DSCNT RATE FOR 3 DEGS GS; WHICH WOULD PUT US IN POS TO LAND XING THE RWY THRESHOLD. THE SECOND APCH WAS UNEVENTFUL WITH THE EXCEPTION OF A GPWS 'SINK RATE' AND GS JUST PRIOR TO LNDG. ONCE ON THE GND WE HAD LATER LEARNED THAT THE ILS TO RWY 4 WAS ACTIVE (THEY BOTH USE THE SAME FREQ 109.9). UPON LEARNING THIS; WE WERE NOT SURE IF THE TWR HAD NOT TOLD THE CTR THAT THEY HAD SWITCHED THE ILS TO THE OTHER RWY; ALTHOUGH WE DID SEE OTHER ACFT VECTORED TO RWY 4.