According to city records, the owners of three vacant historic buildings on Congress Avenue between 9th and 10th street are planning to build a 16-story, 88,000 square foot office tower on the site. If successful, the project would commence construction in 2011 and open by Summer 2012.According to a statement by Tucker Lynch, a representative of the site owners, in the Austin Business journal, “The owners told us to keep it as quiet as possible,” Lynch said. “We are just doing our feasibility. If it is not feasible, we won’t build.&rdquo . . .