A report released today by Dan Gilbert's Rock Ventures LLC says the economic impact of its planned redevelopment of the half-built Wayne County Consolidated Jail site and building the county a new criminal justice complex a few miles north totals $2.39 billion for Southeast Michigan.

The 14-page report, completed by the University of Michigan Center for Sport & Policy and commissioned by Detroit-based Rock Ventures, says the redevelopment of 15-acre Gratiot Avenue property into a Major League Soccer stadium and three high-rise buildings for residential, office and hotel use is expected to cost $1.462 billion while Gilbert's plan to build a new criminal justice complex for the county at I-75 and East Forest Avenue would cost $420 million, bringing that expected investment to $1.882 billion.

The analysis projects one-third of the costs to be labor and two-thirds to be materials.

“This study does nothing to sway my thinking," Wayne County Executive Warren Evans said in a statement. "My standard for Rock’s proposal has been absolutely clear: Is Rock prepared to build the county a criminal justice complex in a timely fashion, with buildings that meet our needs, at a price Wayne County can afford? If they can’t meet that standard, everything else is irrelevant. This study moves us no closer to answering that fundamental question."

The total economic impact, when factoring in indirect and other effects, is $2.39 billion supporting 32,133 jobs during construction of the new criminal justice complex, stadium and high-rises, according to the report.

The impact of finishing the half-built jail is $352 million and would support 3,810 jobs, the report says.

The economic impact tally for the Rock projects comes from $977.4 million in materials, assuming 75 percent of them are purchased in Michigan, and $1.412 billion in labor.

The report also says the stadium and high-rise developments would support 2,106 permanent jobs, which would generate $4.9 million in state and $1.5 million in Detroit income taxes each year. During the five-year construction time frame, $51.9 million in state and local income taxes would be generated, the report says, with $44.8 million going to the state and $7.1 million going to the city.

Matt Cullen, principal of Rock Ventures, told Crain's in February that if Rock's proposal is not accepted, it would look for other sites for an MLS stadium. Gilbert also said in media interviews that month that if Wayne County accepts Rock's offer, but Gilbert and Gores do not get an MLS team, a mixed-use development would be built on the jail site, without the stadium.

Since 2010, when Gilbert moved his Quicken Loans Inc. employees and others to the downtown core, he has emerged as the biggest real estate force Detroit, buying buildings and proposing sweeping new developments, including for the former J.L. Hudson's department store site on Woodward Avenue and the MLS stadium project with Detroit Pistons owner Tom Gores.

In February, Rock Ventures submitted its proposal to the county.

Evans' administration has hired consultants to evaluate the Rock Ventures proposal, while Walsh Construction is expected to submit a plan for completing the Gratiot Avenue jail by next month.

The proposal calls for a 1,600-bed jail for adults (with a county option for 400 more beds for $43 million more) and a 160-bed jail for juveniles, along with a courthouse, sheriff's office, prosecutor's office and surface parking. The new courthouse would include 25 courtrooms and judges' chambers.

The new criminal justice complex would cost $420 million, but Rock says it would do it for $300 million "in exchange for the transfer of the Gratiot Avenue property and a credit for the savings a new consolidated criminal justice complex will provide."

The jail project was halted four years ago when cost overruns pushed the price tag from $220 million to an estimated $391 million. The complex was designed to consolidate Wayne County's criminal justice facilities in downtown Detroit.

The report comes as the Michigan House of Representatives considers legislation that could give the project tax incentives.

In Lansing, Gilbert and a statewide coalition known as MI Thrive is pressing legislation that would allow developers to capture a portion of sales and income taxes to help fund so-called "transformational" developments in cities large and small.

The private investment threshold for Detroit is $500 million. The Michigan Senate passed the legislation in February; the House Tax Policy Committee held a hearing on the bills last month.

The report says that it had not yet been determined whether Rock Ventures would seek the "transformational" designation for the project.