Mexico South Texas Pipeline Home > Projects > Mexico South Texas Pipeline Mexico South Texas Pipeline 42 and 48-inch 124-mile pipeline that extends from Agua Dulce Hub to US-Mexico border near Rio Grande City. Location: South Texas124 mile natural gas pipeline42 and 48 inch65 InspectorsCompletion Year: 2014 Challenges 48-inch DirectPipe crossing under Rio Grande River Related Projects Transmission Modernization & Maintenance Alliance Program Pipeline and M&R Gathering System