Explore the people, events and new innovations making news at the Prairie State Energy Campus.

October 5, 2015

Public Power Week 2015

This week marks Public Power Week's 29th anniversary as a nationwide program to celebrate the importance of public power to local citizens and other key publics, including state and national officials. The American Public Power Association (APPA) sponsors Public Power Week.

Prairie State is proud to be public power owned and maintains the same principles as set forth by public power: to supply our owners and their members with reliable power that is produced in a safe and environmentally responsible manner. Prairie State is celebrating Public Power Week along with the APPA and more than 2,000 other not-for-profit, community-owned electric utilities that collectively provide electricity to 48 million Americans.

In honor of public power week, Prairie State and its employees encourage you to take the "energy pledge" and think of ways you can save energy at your home.

For more information, visit


September 16, 2015


Throughout the summer of 2015, Prairie State Generating Company’s (PSGC) power plant team delivered strong operational performance for its owners and the member-communities they serve. In June, the power plant began the successful summer run with record performance on both units, reaching several significant station and unit milestones. The highest monthly Equivalent Availability Factor (EAF), Net Capacity Factor (NCF), and net generation were achieved for Unit 1 and the station in June.
Following improved reliability in June, PSGC continued to set new records in July while remaining focused on safe and environmentally compliant operations. Unit 2 recorded the highest monthly EAF, NCF, and net generation. August proved to be another record-breaking month as well, with Unit 1 surpassing the monthly EAF, NCF, and net generation records that were previously set in June.
PSGC’s continuous summer operations (June through August 2015) were the highest in station history. “Prairie State is a learning organization, constantly seeking methods to advance our energy campus. The improved coal quality in our mining operation and higher reliability at the power plant this summer are a direct result of that philosophy,” said PSGC Chief Executive Officer, Don Gaston.
The entire PSGC team is pleased to demonstrate this improved performance and is dedicated to sustained reliability.

The Equivalent Availability Factor (EAF) measures the percentage of time that a generation unit is available to generate electricity if called upon in the marketplace.

The Net Capacity Factor (NCF) of a power plant is the ratio of its actual output over a period of time to its potential output, if it were possible for it to operate at full capacity.