Midwest ISO implements next phase of its commercial operations plan

CARMEL, Ind., Feb. 1, 2002 — In the continuation of its commercial operations plan, the Midwest Independent Transmission System Operator, Inc. (MISO) implemented its tariff today.

With this step the MISO is now providing regional transmission service for the movement of bulk power in the Midwest ISO footprint.

Effective today, transmission customers are able to request transmission service from Midwest ISO over the facilities owned by Midwest ISO transmission owners. The Midwest ISO is responsible for evaluating and coordinating those requests for access to the regional power grid on a non-discriminatory basis. Prior to the implementation of the Midwest ISO tariff, transmission customers contracted for service from each transmission owner separately.

“Transmission customers in the Midwest can now benefit from the vision outlined by the Federal Energy Regulatory Commission in Order 2000 of standardized rates, terms and conditions for transmission service over a broad region,” said James P. Torgerson, president and chief executive officer of the MISO.

With the implementation of the MISO tariff, transmission customers are able to:

* Request transmission service from a single source utilizing the MISO’s OASIS site. OASIS, or the Open-Access Same-Time Information System, is a web-based posting system required by the Federal Energy Regulatory Commission to ensure that all transmission customers can view transmission availability data at the same time and request transmission service in the same manner. The MISO’s OASIS site has been operating in parallel with transmission owners’ individual OASIS sites since Nov. 28th.

* Take advantage of a streamlined electronic scheduling agent that allows transmission customers to schedule their approved transactions for service across multiple control areas in the MISO footprint with a few mouse clicks.

* Benefit from an independent, regional analysis of bulk power flows utilizing a standard methodology. * Receive a single bill for all transmission service provided by the Midwest ISO.

The Federal Energy Regulatory Commission approved the Midwest ISO as the nation’s first Regional Transmission Organization (RTO) on Dec. 19, 2001. RTOs are responsible for ensuring the reliable operation of the wholesale electric transmission system and for ensuring fair access to the system.

The Midwest ISO has been providing security coordination and other non- tariff related regional transmission functions such as operations planning, generation interconnection, maintenance coordination, long-term regional planning, market monitoring and dispute resolution since Dec. 15, 2001.

Headquartered in central Indiana, the Midwest ISO serves as an agent for its 21 transmission-owning members, controlling the flow of electricity over 86,000 miles of electric transmission lines that span a 15-state area and parts of Canada.

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