Mayor Bob Duffy's questions about Renaissance Square aren't going away.

Duffy wrote to the other Main and Clinton Development Corp. board members to outline his concerns. He again wants assurances that the project can be built for $230 million, and he wants alternatives to be considered in case it can't.. Before fund-raising begins, however, he also wants a "credible estimate" of the ongoing operating costs for the project, as well as a plan for ownership of the theater and other components. He also wants any "operating cost gap" and its funding mechanism to be identified.

"He doesn't feel comfortable fund-raising for something that doesn't have an operating plan," says city spokesman Gary Walker.

The Main and Clinton board is scheduled to meet at 10:30 a.m., Tuesday, August 12, at the Auditorium Theater. A project spokesman wouldn't say what is on the agenda, and Walker said that the mayor hadn't been told either.