CALENERGY COMPANY, INC., as Issuer MAVERICK REINCORPORATION SUB, INC. (Successor to CALENERGY COMPANY, INC. and to be known as MIDAMERICAN ENERGY HOLDINGS COMPANY) and IBJ WHITEHALL BANK & TRUST COMPANY, as Trustee FOURTH SUPPLEMENTAL INDENTURE Dated...Fourth Supplemental Indenture • May 11th, 1999 • Calenergy Capital Trust Vi • Cogeneration services & small power producers • New York
