LITTLE ROCK, Arkansas, March 7 -- Southwest Power Pool, a corporation mandated by the Federal Energy Regulatory Commission to ensure supplies of power, transmission infrastructure and wholesale electricity prices, issued the following news release: * * * SPP names Carrie Simpson new Vice President of Markets LITTLE ROCK, ARK. - Southwest Power Pool (SPP) has chosen Carrie Simpson to serve as Vice President of Markets, effective April 1. Simpson currently serves as SPP's Senior Director of Seams and Western Services. She will fill the role va more PR