GUARANTY OF GUARANTORGuaranty • September 4th, 2019 • New YorkTHIS GUARANTY, dated as of September 1, 2019, is issued by Avangrid, Inc., a New York corporation, (“Guarantor”) in favor of Deuel County, South Dakota a political subdivision of the State of South Dakota (“Guaranteed Party”). Tatanka Ridge Wind, LLC, a Delaware limited liability company, (“Obligor”) is an indirect wholly owned subsidiary of Guarantor.