A PA46 PLT INADVERTENTLY CROSSES THE RWY HOLD LINE THAT WAS OBSCURED BY CONSTRUCTION AT APA; CO.

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I RECEIVED A TAXI CLRNC TO RWY 17L AT APA. AS I TAXIED ONTO THE PARALLEL TXWY; IT WAS UNDER CONSTRUCTION AHEAD. I ASKED THE CTLR WHAT THE EASIEST WAY AROUND IT WAS; AND HE SAID 'YOU HAVE TO JUST FIND YOUR WAY AROUND IT ON THE RAMP.' AS I REACHED THE END OF THE RAMP; I TAXIED TOWARD THE APCH END OF THE RWY. THE HOLD SHORT LINES WERE ASPHALTED OVER; THEREFORE THERE WAS NOT A LINE ON THE GND. I TAXIED AND STOPPED WHERE I THOUGHT THE LINE WAS. THE CTLR ADVISED ME I WAS PAST THE HOLD LINE AND TO CONTACT THE TWR AS SOON AS POSSIBLE. I OFFERED TO DO A 180 DEG TURN AND GET ON THE CORRECT SIDE AND THEY TOLD ME THAT THERE WAS NOT TFC ON FINAL; TO JUST CONTACT TWR. WITH ALL OF THE CONSTRUCTION; IT WAS HARD TO TELL WHERE THE HOLD LINE WAS. I DID NOT NOTICE THE HOLD LINE SIGN; POSSIBLY DUE TO THE CONSTRUCTION. I FEEL THE TWR COULD HAVE GIVEN MORE INFO ON THE END OF THE TXWY/HOLDING AREA; BUT I AM AT FAULT FOR NOT ASKING FOR HELP; WHEN I KNEW I NEEDED IT. NEXT TIME; I WILL NOT HESITATE TO ASK FOR HELP WHEN I NEED IT; AND TO BE MORE AWARE OF THE SIGNS ON THE ARPT.