At least 10 groups have responded to Richmond’s call for companies to redevelop the 60 acres of mostly cleared city property that includes The Diamond baseball stadium and the Arthur Ashe Jr. Athletic Center on North Boulevard.

“This is the kind of response that we wanted,” Lee Downey, the city’s chief development officer, said as the city begins the process of selecting a master developer to transform the area into a potential $300 million complex of offices, retail stores and residential units.

He said the project proved attractive to an array of groups as it is one of the largest contemplated on the East Coast.

An internal city panel is reviewing the qualifications of those who responded by the Oct. 31 deadline, he said, to “ensure that they have the experience, financial strength and ability to take on this kind of project.”

He said he expects the review to be completed within six to eight weeks.

At this point, the responders’ names are being withheld, he said, as the city is allowed under the state’s public-private partnership laws.

Once the review is completed, he said the names of the groups that will be allowed to compete in the second phase would be made public. He said he hopes that every group will qualify, although some may not.

Mr. Downey said the groups that pass muster would be presented with a formal “request for proposal,” or RFP, which would spell out the city’s requirements and seek specifics from each of the competing groups on their vision for developing the property.

He said the city would then scrutinize the proposals before returning to City Council with a recommendation. That process is expected to take up to six months.

One trouble area for the project, The Diamond ballpark that is home to the Richmond Flying Squirrels, has been resolved with the recent agreement of Virginia Commonwealth University to build a new stadium for the San Francisco Giants’ farm team and its own baseball program at an undisclosed location near the Boulevard property.

VCU has yet to disclose a site or specify how it would cover the cost for the new stadium that also would be used for concerts and other public events.

However, outgoing Mayor Dwight C. Jones has yet to resolve another problem — the Ashe Center, which occupies a key part of the property at Boulevard and Robin Hood Road.

He has yet to offer a plan for replacing the building, which is owned by the Richmond Department of Parks, Recreation and Community Facilities but that the school system has long used for basketball games, convocations, military drills and a host of other events.