A CPR MDT TOOK OFF ON A CLOSED PORTION OF A RWY UNDER CONSTRUCTION.

Narrative

BLOOMINGTON; IN; IS EXTENDING ITS RWY 17/35. CONSTRUCTION BARRIERS HAVE BEEN SET UP IN THE VICINITY OF THE END OF THE ORIGINAL ARR END OF RWY 17. A NOTAM WAS PUT OUT TO SHORTEN THE LENGTH OF RWY 17 BY 500 FT AND STATED THIS AREA AS A DISPLACED THRESHOLD. HOWEVER; A NOTICE PUT OUT BY THE ARPT MGR DESCRIBED THE 500 FT AREA AS CLOSED FOR DEPS ON RWY 17. ACFT WAS INSTRUCTED BY TWR TO TAXI INTO POS AND HOLD WITH FOLLOW ON INSTRUCTIONS ON WHERE NOTAMED TKOF POINT WAS. CAPT TAXIED ALL THE WAY BACK TO THE CONSTRUCTION BARRIERS AND TURNED AROUND. I ASSUMED THE CAPT KNEW WHERE THE NEW DEP/TKOF POINT WAS AND THAT HE WAS GOING TO ROLL UP TO IT PRIOR TO APPLYING TKOF PWR. TWR GAVE TKOF CLRNC. THE CHKLIST WAS COMPLETED AND THE CAPT APPLIED TKOF PWR CLOSE TO THE BARRIERS. SUBSEQUENTLY; ONE BARRIER FELL OVER AND CRACKED; AND A CONSTRUCTION WORKER IN A PICKUP TRUCK WAS SHAKEN UP/SCARED. THE TKOF WAS NOT RUSHED; SO I BELIEVE I SHOULD HAVE REMINDED THE CAPT ABOUT WHERE I FELT THE TKOF POINT WAS. THE TWR ALSO WATCHED US STOP CLOSE TO THE BARRIERS AND SAID NOTHING. ALSO; THE NOTAM WAS WRITTEN/WORDED INCORRECTLY AND SHOULD HAVE CLOSED THAT PORTION OF THE RWY.