South Central MCN


Notice of South Central’s Posting of Business Practice Manual Development Guidelines
April 20, 2018

Today, South Central posted guidelines to develop or update Business Practice Manuals (BPMs), which South Central may use to provide any needed implementation details regarding transmission service under the South Central Open Access Transmission Tariff. Any BPMs developed pursuant to these BPM Development Guidelines will be posted and maintained on GridLiance’s corporate website. Questions or comments regarding any posted BPMs may be directed to South Central’s Point of Contact for Transmission Service at

Notice of Discounted Non-Firm Point-to-Point Transmission Service Rates, effective April 6, 2018
April 5, 2018

Effective April 6, 2018, South Central will begin offering the following discounted rates for Non-Firm Point-to-Point Transmission Service under its OATT.

  • Monthly Non-Firm:         $1.9533 / kW-Month
  • Weekly Non-Firm:           $0.4508 / kW-Week
  • Daily Non-Firm:                $0.0642 / kW-Day
  • Hourly Non-Firm:             $2.6740 / MW-Hour

All other prices remain unchanged.

Open Access Transmission Tariff Service

On March 30, 2018, South Central MCN LLC (South Central) submitted an Open Access Transmission Tariff (OATT) with the Federal Energy Regulatory Commission (FERC) in Docket No. ER18-1267-000 to provide transmission service on a non-discriminatory basis to any eligible customer that submits a valid service request under South Central’s OATT. South Central is a transmission-only company (Transco) formed by GridLiance Holdco, LP (GridLiance) to partner with municipal electric utilities, electric cooperatives, and joint action agencies in the Southwest Power Pool (SPP) region to solve transmission issues, optimize its partners’ systems, and help manage costs on these systems to the benefit of its partners and the broader transmission grid. South Central is wholly-owned by GridLiance Heartland LLC, which is a wholly-owned subsidiary of GridLiance. South Central requested an effective date of March 31, 2018 for its OATT.

South Central currently maintains a waiver of the FERC requirements to establish and maintain an Open Access Same-time Information System (OASIS). In lieu of an OASIS page, South Central will post certain information regarding the rates, terms, and conditions of its OATT service on the South Central page of GridLiance’s corporate website. 

South Central is a transmission owner pursuant to the SPP Regional OATT and will not provide transmission service under the South Central OATT on any facilities under the functional control of SPP.


North American Energy Standards Board

For inquiries regarding transmission service, generation interconnections, or other transmission planning functions, contact Eric Burkey, Director Transmission Planning through one of the following methods: email, phone 469-718-7044 or fax 469-718-7007.

South Central MCN LLC has determined its transmission maps, one-lines, and system models are deemed Critical Energy Infrastructure Information (CEII). To access this information, please send an email with your detailed request to: