This report details the work of a Spring 2011 Advanced Urban Planning Studio at Columbia University. Running between January-May 2011 students examined the challenges of regional planning for the inter-municipal Consortium of Leste Fluninense (CONLESTE) in response to Petrobras' Rio de Janeiro Petrochemical Complex (COMPERJ). Comperj is a mega-development project whose physical size and projected economic and social impacts are unprecented in the region and in Latin America as a whole.