The company is expected to join the Midwest Independent Transmission System Operator (MISO), which directs electricity movement in parts of 11 states of the US and Canadian province of Manitoba, in December 2013.
Indiana-based MISO would save Entergy customers $1.4bn over 10 years and ensure the customers get the cheapest possible electricity.
Entergy Mississippi CEO Haley Fisackerly was quoted by Bloomberg as saying that "It’s clear that MISO is good for our customers and the communities we serve, and we’re appreciative of our commission’s decision that joining MISO is in the public interest."
The entities said they would work together to smooth Entergy’s entrance into MISO. Entergy serves 437,000 customers in 45 US counties.
