 While construction of the other two sections of the turnpike ran according to schedule , progress on the Broken Arrow south loop lagged behind . Cost overruns due to higher @-@ than @-@ estimated land acquisition costs caused delays as the project was revised to save money . The project was stalled further by the May 3 , 1999 , tornado outbreak , as utility contractors were pulled off the project to contribute to service restoration efforts in the Oklahoma City area . By August 1999 , the south loop was six months behind schedule . Despite the cost @-@ saving measures , the south loop remained over budget by $ 16 million ( around $ 24 @.@ 5 million in 2015 dollars ) in July 2000 . The western extension was also over budget ; OTA discovered over 100 abandoned oil wells that needed to be capped and leftover piping in the turnpike corridor . Budget overruns on the western leg of the turnpike were $ 5 million ( about $ 7 @.@ 7 million in 2015 dollars ) in July 2000 . 
