MoGas was created in 2008 by the combination of three affiliated pipeline systems: Missouri Interstate Gas (MIG), Missouri Gas Company (MGC) and Missouri Pipeline Company (MPC). Prior to 2008, MGC and MPC operated as intrastate pipelines in Missouri, subject to regulation by the Missouri Public Service Commission. MIG, which operated an interstate pipeline between Missouri and Illinois traversing the Mississippi River, was regulated by the Federal Energy Regulatory Commission (FERC).
By 2006, it became apparent that it would be beneficial to the companies and customers to consolidate the three companies to operate as one single interstate system. Accordingly, the companies sought and received FERC approval for consolidation and certification, and the company began FERC-regulated service as a single entity on June 1, 2008.
Today MoGas is divided into two zones for rate purposes. As reflected in the system map, Zone 1 encompasses the former MPC and MIG systems (primarily running east to west) and Zone 2 includes the former MGC system.