Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Southwestern built and operates its transmission system for the primary purpose of delivering Federal hydropower to its customers under long-standing, firm purchase power agreements.
Any transmission capacity remaining is administered by the Southwest Power Pool, Inc. (SPP) Regional Transmission Organization under an agreement between Southwestern and SPP, which became effective April 1, 2005.
