SUPERIOR WATER, LIGHT AND POWER COMPANY To (formerly First Bank (N.A.)) As Trustee Under Superior Water, Light and Power Company's Mortgage and Deed of Trust, Dated as of March 1, 1943 THIRTEENTH SUPPLEMENTAL INDENTURE Dated as of May 21, 2018Thirteenth Supplemental Indenture • August 2nd, 2018 • Allete Inc • Electric & other services combined
