FLT CREW HAS A RWY INCURSION AT RWY 25 GEG.

Narrative

AFTER PUSHBACK FROM THE GATE; WE RECEIVED THE CLRNC 'TAXI RWY 25 VIA TXWY D; CROSS RWY 21 AT TXWY D; AND TURN L ON TXWY C.' I READ BACK THE CLRNC AND THE CAPT STARTED TO TAXI. THE TAXI CHKLIST WAS COMPLETED AND OUR FLT ATTENDANTS WERE SEATED. WE CROSSED RWY 21 ON TXWY D AS INSTRUCTED AND TURNED L ON TXWY C. TXWY C IS A NEWER ADDITION TO THE GEG ARPT; NEITHER I NOR THE CAPT HAD USED IT BEFORE. THE CAPT ASKED ME TO CONFIRM THAT HE WAS INDEED ON TXWY C AND I CONCURRED. AS WE TAXIED DOWN TXWY C; I WAS LOOKING OUTSIDE THE ACFT; SCANNING FOR TFC IN THE PATTERN. AS I LOOKED STRAIGHT IN FRONT OF THE ACFT ON THE TXWY; I SAW A HOLD SHORT LINE THAT WE WERE JUST ABOUT TO CROSS. I TOLD THE CAPT; BUT IT WAS ALREADY TOO LATE. AFTER WE CROSSED THE LINE; I IMMEDIATELY LET THE TWR KNOW THAT WE WERE READY. THE CTLR RESPONDED THAT WE WERE CLR FOR TKOF. I RESPONDED. THE CTLR THEN ASKED IF WE SAW THE HOLD SHORT LINE. THE CAPT RESPONDED; 'NOT UNTIL IT WAS TOO LATE.' THE CTLR RESPONDED THAT WE ARE 'ZERO FOR THREE SO FAR THIS MORNING.' SUPPLEMENTAL INFO FROM ACN 696594: THERE WAS NO TFC AROUND; SO I STOLE A GLANCE OVER AT THE FBO TO ADMIRE SOME GA ACFT. ABOUT THAT TIME; MY FO SAYS THAT HE THINKS WE JUST WENT PAST A HOLD SHORT LINE. WE WERE STILL ABOUT 1000 FT FROM THE END OF THE RWY WHERE THE HOLD SHORT LINE USED TO BE. THE TWR CONFIRMED THAT WE DID INDEED MISS THE HOLD SHORT AND THEY WERE BATTING ABOUT 0 FOR 3 ON THAT ISSUE SO FAR THIS MORNING!