Page 8 - ES&G report 2021 final

2007: First utility-scale wind generation in Missouri Hydropower – a longtime part of a diverse generation mix

Today: 1,240 MW from eight farms in three states
At Associated’s formation in 1961, hydropower was the key source of power. Today, the hydropower from
federal dams in Missouri, Oklahoma and Arkansas continues as a reliable resource Associated uses to supply
electricity to members. While hydropower is our least expensive resource, it is a limited commodity dependent
on rainfall and the capacity of lakes and dams to store the water, as well as a federal allocation to multiple
power companies.

Clear Creek Wind Farm
Table Rock dam

2007-2008 2010 2012

A historic first: wind and

hydropower supply full member load

Associated Electric Cooperative experienced a generation milestone April 6, 2021, by serving 100%
150 MW 150 MW 300 MW of member load with wind energy and hydropower. Member load for the first hour was 1,425 mega-
watt-hours and it was served with 400 MWh of hydropower and 1,025 MWh of wind energy.

While not typical, other wind production milestones included:
2015 May-2020 Dec-2020
• Achieving 95% capacity factor during the hour ending at 8 p.m. on Dec. 22, 2020, serving 45% of
member load during that hour.
• Serving 72% of member load with only wind April 6, 2021.

• Marking 74%, the largest for serving member load up to that time, with wind energy and hydro-
168 MW 235 MW 237 MW power, on April 8, 2021, for the hour ending at midnight. This included 698 MWh of wind and
460 MWh of hydropower.
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