I don't know much about the proposed threat to the Lemp Avenue site, but I saw this on Indymedia:
Save The Site
When: 2:00pm, Saturday 01 January
Contact: Barbara Woodruff, email@example.com
Location: 3314 Lemp Avenue
Transport: Feet from the old Lemp Brewery and just off Broadway.
This site is believed to have been a part of the Underground Railroad and is now in danger of being destroyed and replaced with condos.
We cannot allow our historical sites to be destroyed. This site is of special significance to the African American community as well as the community at large.