It completed the new black granite and glass tower in 1984 .
ONEOK realized that it would be more economical to cap the planned structure at 17 stories and move its headquarters there , rather than to proceed with its original plan .
ONEOK completed the new black granite and glass tower in 1984 .
ONEOK realized that it would be more economical to cap the planned structure at 17 stories and move its headquarters there , rather than to proceed with its original plan .