 On June 18 , 1989 , OTA officials announced that the majority of the city 's proposed amendments to the Creek Turnpike would be incorporated into the design . The alterations added $ 6 million ( about $ 15 million in 2015 dollars ) to the cost of the project . However , the revised plan required the demolition of only 41 houses , six fewer than originally planned . Further alterations were negotiated throughout the latter half of 1989 , with OTA and Tulsa reaching an agreement on December 29 . The plans were adapted to include flood and noise control provisions . To meet these requirements , the highway would be lowered , with some sections below @-@ grade . In exchange , the City of Tulsa agreed to pay $ 1 @.@ 3 million in annual maintenance costs until 2020 . The deal also included a land swap , with the city giving OTA land from Hunter Park and receiving land along the right @-@ of @-@ way to construct recreational trails . 
