Reduced costs, improved operating efficiencies expected for customers

Little Rock, Ark. – Entergy Arkansas, Inc. officials today filed a report with the Arkansas Public Service Commission outlining the expected benefits of the company joining the Midwest Independent Transmission System Operator. On April 25, the company announced its proposal to join MISO, a regional transmission organization serving 13 states.

Entergy Arkansas anticipates formally asking the APSC for approval later this year to transfer operational control of its transmission facilities to MISO with a target implementation date of December 2013.

After extensive review and analysis, Entergy Arkansas believes that joining MISO is the best option for its customers and will provide the largest customer benefits. Entergy Arkansas projects net benefits of between $192 million and $263 million from 2013 to 2022 by joining MISO, primarily the result of MISO’s large, more efficient marketplace. The projected net benefits are the estimated production cost-related savings, minus increased administrative and transmission costs.

“Today’s filing shows that joining MISO is the best approach in the near- and long-term for Entergy Arkansas to continue to provide reliable electric service at an affordable cost,” said Entergy Arkansas President and Chief Executive Officer Hugh McDonald. “At the same time Entergy Arkansas will terminate its participation in the System Agreement, formally ending the current equalization payments. MISO will provide Entergy Arkansas customers the benefits of MISO’s proven market structure.

“I’m confident that our participation in MISO will bring many advantages to our customers. MISO’s established Day 2 Market, which effectively and economically matches supply and demand, is a critical factor in our determination,” continued McDonald. “We will continue to work closely with the Arkansas Public Service Commission as they consider this important, complex, and technical matter.”

Entergy Arkansas, Inc. provides electricity to 697,000 customers in 63 counties. Entergy Corporation is an integrated energy company engaged primarily in electric power production and retail distribution operations. Entergy owns and operates power plants with approximately 30,000 megawatts of electric generating capacity, and it is the second-largest nuclear generator in the United States. Entergy delivers electricity to 2.7 million utility customers in Arkansas, Louisiana, Mississippi and Texas.

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For a Frequently Asked Questions document, visit http://entergy.com/rto/faq.pdf
For more information, Entergy’s online address is www.entergy.com.

The Midwest Independent Transmission System Operator is a non-profit 501(C)(4) organization that ensures reliable operation of, and equal access to, interconnected, high-voltage power lines in 13 U.S. states and the Canadian province of Manitoba. www.midwestiso.org.

In this news release, and from time to time, Entergy Corporation makes certain “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Except to the extent required by the federal securities laws, Entergy undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise.

Forward-looking statements involve a number of risks and uncertainties. There are factors that could cause actual results to differ materially from those expressed or implied in the forward-looking statements, including (a) those factors discussed in: (i) Entergy’s Form 10-K for the year ended December 31, 2010 and (ii) Entergy’s other reports and filings made under the Securities Exchange Act of 1934, (b) uncertainties associated with rate proceedings, formula rate plans and other cost recovery mechanisms, (c) uncertainties associated with efforts to remediate the effects of major storms and recover related restoration costs, (d) nuclear plant relicensing, operating and regulatory risks, including any changes resulting from the nuclear crisis in Japan following its catastrophic earthquake and tsunami, and (e) legislative and regulatory actions, and conditions in commodity and capital markets during the periods covered by the forward-looking statements, in addition to other factors described elsewhere in this release and in subsequent securities filings.