One Rincon Hill Phase II (North Tower) is under construction. see link below for pics.
http://forum.skyscraperpage.com/show...=199764&page=4
also the height should read 541ft see below:
The zoning for rincon hill was 550' and 450' with additional allowances for mechanical and architectural features. Thus tower one is 641'. In the same light, tower two will be 450' + 91' = 541' This was confirmed way back in 2006 when J Church got his hands on the architectural drawings. Fflint verified this to be correct.
http://forum.skyscraperpage.com/show...ht=rincon+hill