While Wayne County residents should have a state-of-art criminal justice center in Detroit by 2022, complete with a new jail, courthouse and offices for the sheriff and prosecutor, they'll pay a hefty price after the debacle that's played out over the last eight years.

The total taxpayer cost is over $600 million, along with the transfer of 13 acres of prime, county-owned, downtown real estate to Quicken Loans founder Dan Gilbert.

Collier's International recently appraised that property, which is across the street from Ford Field, at a conservative $62 million, but Gilbert's nonprofit, Rock Economic Development Group, acquired it from the county for $21 million, according to the agreement.

Since 2013, taxpayers have accrued nearly $1.2 million a month is costs for debt financing, security and other fees related to the site.

At least $150 million in 2010 bond funds were frittered away on the half-built, to-be-demolished "fail jail" along Gratiot in Downtown Detroit; $380 million is earmarked for the new jail and justice center north of downtown and Wayne County agreed to pay $30 million in municipal parking fee revenue to Gilbert's Rock Ventures over the next 30 years.

Rock Ventures is committing $150 million toward the criminal justice complex, and agreed to pay any cost overruns; however, if the project comes in under its $533 million total forecast budget, Rock Ventures will pocket the first $3 million in savings, receive 70 percent of the next $10 million in savings and split anything beyond that evenly with Wayne County.

The Wayne County Board of Commissioners voted 14-1 to approve the deal Thursday, June 7.

While Wayne County District 1 Commissioner Timothy Killeen said he was wary of handing more Downtown Detroit land over to Gilbert and his companies, he voted in favor of the deal.

"We had nowhere else to go; there is no other option out there for us that wouldn't be extraordinarily more expensive," Killeen said. " ... And even finishing the Gratiot site would have been seriously difficult, because that thing was sitting out there for four winters ... I think a lot of the steel would need to be replaced."

Had the county chosen to complete the unfinished jail, Killeen said it would have cost more in the end, because there's still a need to replace or overhaul the "crappy," 50-year-old Frank Murphy Hall of Justice courthouse, also home to the Wayne County Prosecutor's Office.

After razing the old jails, the unfinished jail and the courthouse, Rock Ventures will have a clean slate to redevelop a bustling section of Downtown Detroit.

Rock Ventures agreed to spend at least $250 million on the new development, allocating at least 51 percent of that money to hire Wayne County workers. If that hiring standard isn't met, Rock would pay a $1 million fine to go toward A. Philip Randolph Technical High School.

Gilbert companies previously proposed building a professional soccer stadium on the fail-jail site in a partnership with Detroit Pistons owner Tom Gores, but the idea was abandoned prior to Detroit learning it wouldn't become a Major League Soccer expansion team.

The never-completed jail project at Gratiot Avenue and Madison Street near Greektown was approved in 2010 under former Wayne County Executive Robert Ficano's administration.

It was initially meant to save the taxpayers money by allowing the consolidation and closure of other jail facilities, but officials in June 2013 halted the project after revelations it was on track to run tens of millions over its $300 million budget.

Wayne County Prosecutors Kym Worthy, after ordering an audit of the failed jail project, issued criminal charges against two former county employees.

Carla E. Sledge of Bonita Springs, Fla., Ficano's chief finance officer from 2005 to 2013, still faces four criminal charges, including two common law offenses and two counts of willful neglect of duty.

Steven M. Collins, who worked as assistant corporation counsel under Ficano, is charged with two counts of misconduct in office.

Collins and Seldge are scheduled to make their next court appearances on July 20.