Careers Contact Us Information for Investors What We're Doing About Southern Company Our Business Transmission Overview Quick Links Interconnection More... Transmission Overview Southern Company operations has responsibility for more than 27,000 miles of transmission lines, 3,700 substations, and 300,000 acres of right of way. The transmission system meets North American Electric Reliability Corporation standards and provides a safe and reliable grid. We plan, design, build, operate, and, maintain our system to meet growing demand. From 2008 to 2011, Southern Company invested $2.3 billion in transmission assets (lines and substations) and distribution substations, which is managed in conjunction with transmission at Southern Company. Business Practices Southern Company operations conducts transmission business in accordance with the Southern Companies Open Access Transmission Tariff approved by FERC. Southern Company transmission's general business practices are posted at OASIS - General Information. North American Energy Standards Board (NAESB) Wholesale Electric Quadrant Standards NAESB rules, standards, and practices may be obtained at the NAESB public website. more Interconnection Southern Company operations has identified optimal sites on the transmission system for the interconnection of new generation, particularly base or intermediate load facilities. more Available Transfer Capability (ATC) Algorithm Southern Company operations has posted its algorithm for calculation of the transmission system ATC. more Interconnection Southern Companies have identified optimal sites on the transmission system for the interconnection of new generation, particularly base or intermediate load facilities. Read More Information for Investors Overview Corporate Governance Latest News Stock Information Financial Information Shareowner Services Electric Utilities Alabama Power Georgia Power Gulf Power Mississippi Power Operations Generation Southern Wholesale Energy Transmission What We're Doing Corporate Responsibility News Center Energy Innovation Environmental Reports Stakeholder Engagement Social Media Celebrating Success The Payne Stewart Award Subsidiaries Southern Nuclear Southern Power Southern-Telecom SouthernLINC Wireless About Southern Company Our Business History Leadership/Governance CEO Facts & Figures Careers at Southern Company Working With Us Energy Auction Suppliers Facebook Twitter LinkedIn YouTube GOOGLE + © 2015 Southern Company. Use constitutes acceptance of General Website Terms and Conditions | Revised Privacy Statement