OBSTACLE FREE ZONE IMPLEMENTED WHEN RWY EXTENSION IS ADDED.

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ON 10/X/92 THE ARPT OPENED A NEW SECTION OF TAXIWAY ALONG RWY 18/36. THIS TAXIWAY ENABLES ACFT TO TAXI TO THE END OF THE NEWLY STRESSED OVERRUN OF RWY 36. THIS OVERRUN GIVES PLTS AN EXTRA 1000 FT FOR TKOF. THE PROBLEM ASSOCIATED WITH THIS IS THE RWY THRESHOLD REMAINS WHERE IT WAS ORIGINALLY. THUS BRINGING THE OBSTACLE FREE ZONE INTO PLAY. ON 10/X/92 I WAS TRAINING AN INDIVIDUAL ON LCL CTL. ACR X WAS 6 MI SE ON A VISUAL APCH TO RWY 36; AND ACR Y WAS AT THE RWY 36 HOLD LINE. I HAD THE TRAINEE TAXI ACR Y INTO POS ON 36. ACR X WOULD HAVE 8-9 MI TO FLY DUE TO THE BASE LEG AND FINAL. WHEN ACR Y GOT TO THE END HE DECIDED TO HOLD SHORT. HE DID NOT EXPLAIN HIS REASON. I THEN TOOK OVER THE MIKE AND TOLD ACR Y HE WAS CLRED FOR AN IMMEDIATE TKOF OR ACR X WOULD HAVE TO GAR ANYWAY. ACR Y TOOK OFF AND ACR X SLOWED BEAUTIFULLY AND WAS ABLE TO LAND. BOTH PLTS DID AN EXCEPTIONAL JOB. HOWEVER THIS IS AN EXTREMELY DANGEROUS SITUATION DUE TO THE LENGTH OF TAXI FOR THE DEPARTING ACFT. I WOULD APPRECIATE ANY HELP YOU CAN AFFORD US ON THIS MATTER. I TALKED TO THE PLT OF ACR X AND HE SAID HE WOULD ADVISE HIS SUPERIORS. WE ARE IN THE PROCESS OF FILING UCR'S. WE WILL BE GOING THROUGH THE UNION FOR ANY HELP THEY CAN GIVE US. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO. RPTR CLAIMS THAT THIS IS NO LONGER A PROBLEM. IT WAS IN EFFECT FOR APPROX 1 WK; THEN CANCELLED. THEY HAVE CHANGED THE NAME TO ILS CRITICAL AREA; SO NOW THEY CAN TAXI ACFT TO THE END UNLESS WX DICTATES OTHERWISE. IT APPEARS THAT THIS 1000 FT EXTENSION WAS RECENTLY STRESSED TO HANDLE HEAVIER ACFT AND SOMEONE CAME UP WITH AN OBSTACLE FREE ZONE; RPTR IS NOT SURE WHO IT WAS. IN ANY CASE; RPTR SAYS IT IS NO LONGER A PROBLEM.