VIGO Co., Ind. (WTWO/WAWV) — The new convention center is expected to come to downtown Terre Haute by the end of 2020, but there are still final details in the works.

The property for the convention center and hotel have not yet been acquired.

According to representatives involved in the project, they are working with three property owners on reaching an agreement on requested modifications to the convention center’s design.

“We had to come to an agreement on these modifications before the owners were willing to relinquish their property either by donation or purchase,” said Steve Bosma of Kroger, Gardis and Regas Law Firm.

The changes requested included a pedestrian connection from the current Hilton Garden Inn and convention center, a downsizing of a future parking garage at the Hilton Garden Inn, and adding an auto court to the proposed Marriott hotel.

“There are two parking garages. One to be built by the capital improvements board that will service the convention center and the proposed Marriott hotel and then a second one on the northwest section that is proposed to service the existing Hilton Garden Inn,” Bosma said.

The construction proposal and guaranteed maximum price of $24 million was brought before the Vigo County Capital Improvement board Wednesday. It passed unanimously.

“We wanted to be sure that the project was complete. We want to have a full design and be sure the hotel developers are on board and that it would move forward successfully,” said Bosma.

Once a purchase agreement is in place, the county will issue a bond which they’ve already approved. From there, a construction timeline will begin.

The groundbreaking is projected for September 6.