This paper presents the Bolivia-BrazilPipeline Project (GASBOL) as a case study for environmentaland social safeguards analysis. The primary purpose of theGASBOL project was to supply the Brazilian market withBolivian gas. The pipeline runs from Rio Grande, Bolivia, toPorto Alegre, Brazil, a distance of 3,150 kilometers. TheProject faced significant environmental, social andinstitutional complexities stemming in part from itsbi-national scope, it size and scale, and the fact that ithad to deal with two legislative frameworks, inequalities ininfrastructure, complex institutional agreements, indigenouscommunities, and sensitive ecological areas. Despite theseconsiderable challenges, the design, construction,implementation, and operational phases of the project werewell managed and as a result GASBOL has established itselfas a benchmark for the management of large infrastructureprojects. The project's innovative approach toenvironmental protection and social support resulted in anumber of good practices and they are outlined in thispaper. It also discusses several lessons learned from bothsuccesses and shortcomings of the project.