The investigator will have 45 days to review documents, subpoena witnesses and issue a report.
Following the publication of a less restrictive policy, the plaintiffs and the city filed a joint motion to dismiss the suit on Wednesday.
The City Council passed a resolution requesting an IG investigation into potential ethical violations in the procurement process.
The city official at the center of the contract-fixing allegations is set to answer questions under oath at a City Council meeting this week.
Council members also approved a resolution to halt a proposed short-term contract for the project, which could be adopted without their approval.
The documents include a draft contract and hundreds of emails showing frequent communications going back years between city officials, a ‘pro bono’ consultant and companies that would eventually win the city bid for the project.
Council members and Gordon Plaza residents both criticized the administration for providing few details of its plan while taking public credit for taking action.
The four-page letter does not address many of the council’s questions and concerns, but it does provide more information about the plan than was previously available.
The Cantrell administration is now considering beginning the project — originally pitched as a multiyear contract — with a one-year agreement, which would not require council approval.
The council characterizes the moves as accountability measures for underperforming departments. But the Cantrell administration says they could make things worse.