 At that time, SH-16 absorbed the wholly paved SH-27 between Bristow and Drumright, setting its western terminus at its present-day location.SH-16's final extension occurred in 1965, when SH-251A was established and SH-16 was realigned to instead continue north past Okay and terminate at SH-51 in Wagoner.No further changes have been made to the highway since then.