Document:

EX-4.1

 Exhibit 4.1 

EXECUTION VERSION 

MIDAMERICAN ENERGY COMPANY 

and 
 THE BANK OF NEW YORK
MELLON TRUST COMPANY, N.A., 
 as Trustee 
  

 
 SEVENTH
SUPPLEMENTAL INDENTURE 
 Dated as of February 1, 2018 

 
  

ESTABLISHING AND CREATING 

3.65% FIRST MORTGAGE BONDS DUE 2048 
  

 

 SEVENTH SUPPLEMENTAL INDENTURE, dated as of February 1, 2018 (herein called the
“Seventh Supplemental Indenture”), between MIDAMERICAN ENERGY COMPANY, a corporation duly organized and existing under the laws of the State of Iowa (herein called the “Company”), and THE BANK OF NEW YORK MELLON
TRUST COMPANY, N.A., a national banking association duly organized and existing under the laws of the United States of America, as Trustee (herein called the “Trustee”), under the Base Indenture referred to below. Capitalized terms
used but not defined herein shall have the meaning assigned to such term in the Base Indenture. 
 W I T N E S S E T H : 

WHEREAS, the Company has heretofore executed and delivered to the Trustee an indenture dated as of September 9, 2013 as amended by the
first supplemental indenture thereto dated September 19, 2013 (herein called the “Base Indenture”), to provide for the issuance from time to time of its first mortgage bonds, the form and terms of which are to be established as
set forth in Section 2.01 of the Base Indenture; 
 WHEREAS, Section 15.01 of the Base Indenture provides, among other things, that
the Company and the Trustee may enter into indentures supplemental to the Base Indenture for, among other things, the purpose establishing the form and terms of the Bonds (as defined in the Base Indenture) of any series as permitted by
Section 2.01 of the Base Indenture; 
 WHEREAS, the Company desires to create one individual series of its first mortgage bonds upon
the basis of Bondable Property (as defined in the Base Indenture) pursuant to Article III of the Base Indenture in the aggregate principal amount of $700,000,000 to be designated the “3.65% First Mortgage Bonds due 2048” (the “
Bonds”), and all action on the part of the Company necessary to authorize the issuance of the Bonds under the Base Indenture and this Seventh Supplemental Indenture has been duly taken; 

WHEREAS, the execution and delivery by the Company of this Seventh Supplemental Indenture, and the terms of the Bonds herein referred to, have
been duly authorized by the Board in or pursuant to appropriate resolutions; and 
 WHEREAS, all acts and things necessary to make the
Bonds, when executed by the Company and authenticated and delivered by the Trustee as provided in the Base Indenture, the valid and binding obligations of the Company and to constitute these presents a valid and binding supplemental indenture and
agreement according to its terms, have been done and performed. 
 NOW, THEREFORE, THIS SEVENTH SUPPLEMENTAL INDENTURE WITNESSETH: 

That in consideration of the premises and of the acceptance and purchase of the Bonds by the holders thereof and of the acceptance of this
trust by the Trustee, the Company covenants and agrees with the Trustee, for the equal benefit of the holders of the Bonds, as follows: 

  
 2 

 ARTICLE I 

DEFINITIONS 
 Unless otherwise
defined herein, the use of the terms and expressions herein is in accordance with the definitions, uses and constructions contained in the Base Indenture and the form of Bonds attached hereto as Exhibit A. 

ARTICLE II 
 TERMS AND ISSUANCE OF
THE BONDS 
 Section 2.01. Issue of Bonds. A series of first mortgage bonds, which shall be designated the “3.65% First
Mortgage Bonds due 2048” shall be executed, authenticated and delivered in accordance with the provisions of, and shall in all respects be subject to, the terms, conditions and covenants of the Base Indenture and this Seventh Supplemental
Indenture (including the form of Bonds set forth in Exhibit A). 
 Section 2.02. Optional Redemption. The Bonds may be
redeemed, in whole or in part, at the option of the Company pursuant to the terms set forth in Annex 1 to the Bonds. The provisions of Article IX of the Base Indenture shall also apply to any optional redemption of Bonds by the Company. 

Section 2.03. Defeasance and Discharge. The provisions of Article XVIII of the Base Indenture shall be applicable to the Bonds.

 Section 2.04. Place of Payment. The Place of Payment in respect of the Bonds will be initially at the Corporate Trust Office
of The Bank of New York Mellon Trust Company, N.A. (which as of the date hereof is located at 2 N. LaSalle Street, Suite 700, Chicago, Illinois 60602, Attention: Corporate Trust Administration). 

Section 2.05. Form of Bonds; Incorporation of Terms. The form of the Bonds shall be substantially in the form of Exhibit A,
the terms of which are herein incorporated by reference and which are part of this Seventh Supplemental Indenture. The Bonds shall be issued in global form as permitted by Section 2.01(c)(xviii) of the Base Indenture. The Bonds issued in global
form shall be delivered by the Trustee to the Depositary, as the Holder thereof, or a nominee or custodian therefor, to be held by or on behalf of the Depositary in accordance with the Base Indenture. 

Section 2.06. Exchange of the Bonds Issued in Global Form. Bonds issued in global form shall be exchangeable for definitive Bonds
only as provided in Section 2.06 of the Base Indenture. 
 Section 2.07. Regular Record Date for the Bonds. The Regular
Record Date for the Bonds shall be the January 15 or July 15 (whether or not a Business Day) immediately prior to each Interest Payment Date. 

Section 2.08. Authorized Denominations. Beneficial interests in the Bonds issued in global form, as well as definitive Bonds, may
be held only in denominations of $2,000 and integral multiples of $1,000 in excess thereof. 

  
 3 

 Section 2.09. Additional Bonds. The Company may from time to time, without the
consent of the Holders of the Bonds, create and issue further securities having the same terms and conditions as the Bonds in all respects, except for the original issue date, offering price and, in some circumstances, the initial interest accrual
date and initial interest payment date. Additional Bonds issued in this manner will be consolidated with, and form a single series with, the Bonds and shall thereafter be deemed Bonds of such series for all purposes. 

ARTICLE III 
 DEPOSITARY 

Section 3.01. Depositary. The Depository Trust Company and its successors are hereby appointed Depositary with respect to the
Bonds issued in global form. 
 ARTICLE IV 

MISCELLANEOUS 
 Section 4.01.
Execution as Supplemental Indenture. This Seventh Supplemental Indenture is executed and shall be construed as an indenture supplemental to the Base Indenture and, as provided in the Base Indenture, this Seventh Supplemental Indenture forms a
part thereof. 
 Section 4.02. Effect of Headings. The Article and Section headings herein are for convenience only and shall
not affect the construction hereof. 
 Section 4.03. Successors and Assigns. All covenants and agreements contained in this
Seventh Supplemental Indenture made by the Company shall bind its successors and assigns, whether so expressed or not. 
 Section 4.04.
Separability Clause. In case any provision in this Seventh Supplemental Indenture or in the Bonds shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be
affected or impaired thereby. 
 Section 4.05. Benefits of Seventh Supplemental Indenture. Nothing in this Seventh Supplemental
Indenture or in the Bonds, express or implied, shall give to any person, other than the parties hereto and their successors hereunder and the Holders of the Bonds, any benefit or any legal or equitable right, remedy or claim under this Seventh
Supplemental Indenture. 
 Section 4.06. Execution and Counterparts. This Seventh Supplemental Indenture may be executed in any
number of counterparts, each of which shall be deemed to be an original, but all such counterparts shall together constitute but one and the same instrument. 

Section 4.07. Trustee Not Responsible for Recitals. The recitals herein contained are made by the Company and not by the Trustee,
and the Trustee assumes no responsibility for the correctness thereof. The Trustee makes no representation as to the validity or sufficiency of this Seventh Supplemental Indenture or of the Bonds. The Trustee shall not be accountable for the use or
application by the Company of the Bonds or the proceeds thereof. 

  
 4 

 Section 4.08. Governing Law. This Seventh Supplemental Indenture and the Bonds shall
be governed by and construed in accordance with the law of the State of New York (including without limitation Section 5-1401 of the New York General Obligations Law or any successor to such statute),
except to the extent that the TIA, shall be applicable and except to the extent that the law of any jurisdiction wherein any portion of the Mortgaged Property is located shall mandatorily govern the creation of a mortgage lien on and security
interest in, or perfection, priority or enforcement of the Lien of the Mortgage or exercise of remedies with respect to, such portion of the Mortgaged Property. 

[SIGNATURE PAGE FOLLOWS] 

  
 5 

 IN WITNESS WHEREOF, the parties hereof have caused this Seventh Supplemental Indenture to be duly
executed by their respective officers or directors duly authorized thereto, all as of the day and year first above written. 
  

					
	MIDAMERICAN ENERGY COMPANY
		
	By:	 	 /s/ James C. Galt

		 	Name:	 	James C. Galt
		 	Title:	 	Treasurer
	
	 THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.,

as Trustee

		
	By:	 	 /s/ R. Tarnas

		 	Name:	 	R. Tarnas
		 	Title:	 	Vice President
		 		 	

  
 SEVENTH SUPPLEMENTAL
INDENTURE 

 EXHIBIT A 

Form of 3.65% First Mortgage Bonds due 2048 

 REGISTERED     

No.                      

ILL.C.C. No. 6701 ($             issued pursuant to Illinois Commerce Commission Docket No. 16-0465) 
 ILL.C.C. No. 6743 ($            
issued pursuant to Illinois Commerce Commission Docket No. 17-0340) 
 MIDAMERICAN ENERGY
COMPANY 
  
  

3.65% First Mortgage Bond due 2048 
  

 
 Unless this
certificate is presented by an authorized representative of The Depository Trust Company, a New York corporation (“DTC”), to the Company (as defined below) or its agent for registration of transfer, exchange or payment, and any certificate
issued is registered in the name of Cede & Co., or in such other name as is requested by an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an authorized
representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch as the registered owner hereof, Cede & Co., has an interest herein. 

The following summary of terms is subject to the provisions set forth below: 

CUSIP: 595620 AS4 
 ORIGINAL
ISSUE DATE: February 1, 2018 
 PRINCIPAL AMOUNT:
$                 
 MATURITY DATE: August 1, 2048
(“Maturity”) 
 INTEREST RATE: 3.65% 

INTEREST PAYMENT DATES: February 1 and August 1, commencing August 1, 2018. 

RECORD DATES: January 15 and July 15. 

OPTIONAL
REDEMPTION:                         ☒  Yes         ☐  No

 MidAmerican Energy Company, an Iowa corporation (herein called the “Company”, which term includes any successor Person under
the Indenture referred to on the reverse hereof), for value received, hereby promises to pay to CEDE & CO. or registered assigns the principal amount of
                 ($                ), in such coin or currency of the United States of
America as at the time of payment is legal tender for payment of public and private debts, on the Maturity Date specified above and to pay interest thereon, in such coin or currency, from and including the Original Issue Date specified above, or
from and including the most recent Interest Payment Date specified above to which interest has been paid or duly provided for, as the case may be. Interest shall be paid in arrears semiannually on each Interest Payment Date in each year commencing
on August 1, 2018, at the per annum Interest Rate set forth above until Maturity and the principal hereof is paid or made available for payment. The interest so payable and punctually paid or duly provided for on any Interest Payment Date will,
as provided in the Indenture, be paid to the Person in whose name this global Bond is registered at the close of 

 
business on the Record Date specified above (whether or not a Business Day) next preceding such Interest Payment Date; provided, however, that interest payable on the Maturity Date
or, if applicable, upon redemption, shall be payable to the Person to whom principal shall be payable. Payment of the principal of and any premium and interest on this global Bond shall be made on or before 10:30 a.m., New York City time or such
other time as shall be agreed upon between the Trustee and the Depositary, of the day on which such payment is due, by wire transfer into the account specified by the Depositary; provided, however, that as a condition to the payment at
the Maturity Date or upon redemption of any part of the principal of and any applicable premium on this global Bond, the Depositary shall surrender, or cause to be surrendered, this global Bond to the Trustee. The Company will pay any administrative
costs imposed by banks in connection with making payments by wire transfer, but not any tax or other governmental charge imposed on the Holder of this global Bond. 

Under certain circumstances, this global Bond is exchangeable in whole or from time to time in part for a definitive individual Bond or Bonds,
with the same Original Issue Date, Maturity Date, Interest Rate and redemption and other provisions as provided herein or in the Indenture. 

REFERENCE IS HEREBY MADE TO THE FURTHER PROVISIONS OF THIS GLOBAL BOND SET FORTH IN FULL ON THE REVERSE HEREOF, WHICH FURTHER PROVISIONS SHALL
FOR ALL PURPOSES HAVE THE SAME EFFECT AS IF SET FORTH IN FULL AT THIS PLACE. 
 Unless the certificate of authentication hereon has been
executed by the Trustee referred to on the reverse hereof, directly or through an Authenticating Agent, by manual signature of an authorized signatory, this global Bond shall not be entitled to any benefit under the Indenture or be valid or
obligatory for any purpose. 

  
 ii 

 IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed. 

Dated: February 1, 2018 
  

					
	 MIDAMERICAN ENERGY COMPANY

		
	 By:
	 	  

		 	 Name:
	 	 James C. Galt

		 	 Title:
	 	 Treasurer

 

					
	 Attest:

		
	 By:
	 	  

		 	 Name:
	 	 Paul J. Leighton

		 	 Title:
	 	 Vice President, Secretary and

		 		 	 Assistant General Counsel

 TRUSTEE’S CERTIFICATE OF AUTHENTICATION 

This is one of the Bonds of the series designated therein referred to in the within-mentioned Indenture. 

 

			
	THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., as Trustee
		
	By:	 	  

		 	Name: R. Tarnas
		 	Authorized Signatory

 [REVERSE OF NOTE] 

MIDAMERICAN ENERGY COMPANY 

3.65% First Mortgage Bond due 2048 

This global Bond is one of, and a global security which represents Bonds which are part of, the duly authorized 3.65% First Mortgage Bonds due
2048 of the Company (herein called the “Bonds”), issued under an Indenture dated as of September 9, 2013, as amended and supplemented (herein called the “Indenture”), between the Company and The Bank of New York Mellon Trust
Company, N.A., as Trustee (herein called the “Trustee,” which term includes any successor Trustee under the Indenture), to which Indenture and all indentures supplemental thereto reference is hereby made for a statement of the respective
rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Holders, and of the terms upon which the Bonds are, and are to be, authenticated and delivered. 

Interest on this global Bond will be payable on the Interest Payment Date or Interest Payment Dates as specified on the face hereof and, in
either case, at Maturity. Unless otherwise specified on the face hereof, payments on this global Bond with respect to any particular Interest Payment Date, redemption date or the Maturity Date will include interest accrued from and including the
applicable Original Issue Date, or from and including the most recent Interest Payment Date to which interest has been paid or duly provided for, to but excluding the particular Interest Payment Date, redemption date or the Maturity Date. Interest
on this global Bond will be computed and paid on the basis of a 360-day year of twelve 30-day months. 

All percentages resulting from any calculation with respect to this global Bond will be rounded, if necessary, to the nearest one
hundred-thousandth of a percentage point (with five one-millionths of a percentage point rounded upward) and all dollar amounts used in or resulting from any such calculation with respect to this global Bond
will be rounded to the nearest cent (with one-half cent being rounded upward). 
 “Business
Day” means, unless otherwise specified on the face hereof, any Monday, Tuesday, Wednesday, Thursday or Friday that in the City of New York, New York is not a day on which banking institutions are authorized or obligated by law or executive
order to close. In any case when any Interest Payment Date, redemption date, or Maturity Date of any Bond shall not be a Business Day at any Place of Payment, then (notwithstanding any other provision of the Indenture or of the Bonds) payment of
interest or principal (and premium, if any) need not be made on such date, but may be made on the next succeeding Business Day with the same force and effect as if made on the Interest Payment Date, redemption date or at the Maturity Date, provided
that no interest shall accrue for the period from and after such Interest Payment Date, redemption date or Maturity Date, as the case may be. 

This global Bond is secured under the Company’s Mortgage, Security Agreement, Fixture Filing and Financing Statement between the Company
and The Bank of New York Mellon Trust Company, N.A., as amended and supplemented from time to time (the “Mortgage”). Reference is made to the Mortgage for a description of the property mortgaged and pledged and the nature and extent of the
security and to the Intercreditor and Collateral Trust Agreement among the Company, the Trustee and The Bank of New York Mellon Trust 

 
Company, N.A., as collateral trustee, and the Indenture for the rights of the holders of the Bonds and of the Trustee in respect thereof. Reference is made to the Indenture and the Mortgage for
the terms and conditions upon which the Bonds are secured and the circumstances under which additional bonds may be issued. 
 This global
Bond will be subject to redemption at the option of the Company on any date in whole or from time to time in part in increments of $2,000 or integral multiples of $1,000 in excess thereof, at the redemption prices specified in an annex attached to
this global Bond, plus accrued interest on the principal amount thereof to be redeemed to the redemption date, but payments due with respect to this global Bond prior to the redemption date will be paid to the Person in whose name this global Bond
is registered at the close of business on the relevant Record Date specified on the face hereof, all as provided in the Indenture. The Company may exercise such option by causing the Trustee to transmit a notice of such redemption, not less than 30
nor more than 60 days prior to the redemption date, in accordance with the provisions of the Indenture. In the event of redemption of this global Bond in part only, this global Bond will be cancelled and a new global Bond representing the unredeemed
portion hereof will be issued in the name of the Holder hereof. This global Bond is not subject to a sinking fund. 
 The Indenture permits,
with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders to be affected under the Indenture at any time by the Company and the Trustee with the
consent of the Holders of not less than a majority in principal amount of the Outstanding Bonds of all series that would be affected thereby. The Indenture also provides that the Holders of not less than a majority in principal amount of the
Outstanding Bonds of all affected series may on behalf of the Holders of all Bonds of such series waive certain existing Events of Default and their consequences. Any such consent or waiver of the Holder of any Bond shall bind every future Holder of
the same Bond and the Holder of every Bond issued upon the registration of transfer thereof or in exchange therefor or in lieu thereof in respect of anything done, omitted or suffered to be done by the Trustee or the Company in reliance thereon,
whether or not notation of such action is made upon such Bond. 
 As set forth in, and subject to, the provisions and limitations set forth
in the Indenture, the Holders of at least a majority in principal amount of the Outstanding Bonds of all series shall have any right to direct the time, method and place of conducting any proceeding for any remedy available to the Trustee, or
exercising any trust or power conferred on the Trustee. 
 THIS GLOBAL BOND IS A GLOBAL BOND REGISTERED IN THE NAME OF THE DEPOSITARY OR A
NOMINEE THEREOF AND, UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR THE INDIVIDUAL SECURITIES REPRESENTED HEREBY, THIS GLOBAL BOND MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF
THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY. 

  
 ii 

 If at any time the Depositary for this global Bond notifies the Company that it is unwilling or
unable to continue as Depositary for this global Bond or if at any time the Depositary for this global Bond shall no longer be registered or in good standing under the Securities Exchange Act of 1934, as amended, or other applicable statute or
regulation, the Company shall appoint a successor Depositary with respect to this global Bond. If a successor Depositary for this global Bond is not appointed by the Company within 90 days after the Company receives such notice or becomes aware of
such condition, the Company shall execute, and the Trustee, upon receipt of a Company Order for the authentication and delivery of definitive Bonds of this series, shall authenticate and deliver Bonds of this series in definitive form in an
aggregate principal amount equal to the principal amount of this global Bond in exchange for this global Bond. 
 The Company may at any
time and in its sole discretion and subject to the procedures of the Depositary determine that the Bonds of this series shall no longer be represented by a global Bond. In such event the Company shall execute, and the Trustee, upon receipt of a
Company Order for the authentication and delivery of definitive Bonds of this series, shall authenticate and deliver, Bonds of this series in definitive registered form without coupons, in any authorized denominations, in an aggregate principal
amount equal to the principal amount of this global Bond, in exchange for this global Bond. 
 The Company may from time to time, without
the consent of Holders of the Bonds, create and issue further Bonds having the same terms and conditions as the Bonds in all respects, except for the Original Issue Date, issue price and, in some circumstances, the initial interest accrual date and
initial interest payment date. Additional Bonds issued in this manner will be consolidated with, and form a single series with, the Bonds and shall thereafter be deemed Bonds for all purposes. 

No reference herein to the Indenture and no provision of this global Bond or of the Indenture shall alter or impair the obligation of the
Company, which is absolute and unconditional, to pay the principal of and any premium and interest on this global Bond at the times, places and rate, and in the coin or currency, herein prescribed. 

The Indenture contains provisions for the satisfaction and discharge of the Indenture upon compliance by the Company with certain conditions
specified therein, which provisions apply to this global Bond. 
 The Indenture contains provisions for the defeasance and discharge of the
Indenture upon compliance by the Company with certain conditions specified therein, which provisions apply to this global Bond. 
 The
Company, the Trustee and any agent of the Company or the Trustee may treat the Person in whose name this global Bond is registered as the owner of this global Bond for the purpose of receiving payment of principal of (and premium, if any) and
interest on this global Bond and for all other purposes whatsoever, whether or not this global Bond be overdue, and neither the Company, the Trustee nor any agent of the Company or the Trustee shall be affected by notice to the contrary. 

  
 iii 

 The Indenture and the Bonds are governed by and construed in accordance with the law of the State
of New York (including without limitation Section 5-1401 of the New York General Obligations Law or any successor to such statute), except to the extent that the TIA shall be applicable and except to the
extent that the law of any jurisdiction wherein any portion of the Mortgaged Property is located shall mandatorily govern the creation of a mortgage lien on and security interest in, or perfection, priority or enforcement of the Lien of the Mortgage
or exercise of remedies with respect to, such portion of the Mortgaged Property. 
 All terms used in this global Bond which are defined in
the Indenture but are not defined in this global Bond shall have the meanings assigned to them in the Indenture. 

  
 iv 

 ANNEX 1 

OPTIONAL REDEMPTION PROVISIONS 

The Bonds will be redeemable, in whole or in part, at the Company’s option at any time or from time to time prior to maturity. Prior to
February 1, 2048 (the “2048 Par Call Date”), the Bonds will be redeemable, in whole at any time or in part from time to time, at a redemption price equal to the greater of (i) 100% of the principal amount of the Bonds being redeemed
and (ii) as determined by the Quotation Agent, the sum of the present values of the remaining scheduled payments of principal and interest on the Bonds being redeemed that would be due if the Maturity Date of such Bonds were the 2048 Par Call
Date (not including any portion of any payments of interest accrued to, but not including, the redemption date), discounted to the redemption date on a semi-annual basis (assuming a 360-day year consisting of
twelve 30-day months) at the Treasury Rate, plus 12.5 basis points (the “2048 Make-Whole Amount”); plus, in either case, accrued and unpaid interest on the principal amount of the Bonds being
redeemed to the redemption date. 
 On or after the 2048 Par Call Date, the Bonds will be redeemable at a redemption price equal to 100% of
the principal amount of the Bonds being redeemed, plus accrued and unpaid interest on the principal amount of the Bonds being redeemed to the redemption date. 

“Comparable Treasury Issue” means the United States Treasury security selected by an Independent Investment Banker as having a
maturity comparable to the remaining term of the Bonds to be redeemed (assuming that the Bonds matured on the 2048 Par Call Date) that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new
issues of corporate debt securities of comparable maturity to the remaining term of the Bonds. 
 “Comparable Treasury Price”
means, the Reference Treasury Dealer Quotation for such redemption date. 
 “Independent Investment Banker” means an investment
banking institution of international standing appointed by the Company. 
 “Quotation Agent” means the Reference Treasury Dealer.

 “Reference Treasury Dealer” means a primary United States government securities dealer in New York City appointed by the
Company. 
 “Reference Treasury Dealer Quotation” means, with respect to the Reference Treasury Dealer and any redemption date,
the average, as determined by the Company, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount and quoted in writing to the Company by such Reference Treasury Dealer at 5:00
p.m. on the third Business Day in New York City preceding such redemption date). 

  
 v 

 “Treasury Rate” means the rate per annum equal to the semi-annual equivalent or
interpolated (on a day-count basis) yield to maturity of the Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the
Comparable Treasury Price for that redemption date. 
 Notice of any redemption will be transmitted (or as long as the Bonds are represented
by one or more global Bonds, transmitted in accordance with DTC’s standard procedures therefor) at least 30 days but not more than 60 days before the redemption date to each holder of the Bonds to be redeemed. If, at the time notice of
redemption is given, the redemption moneys are not held by the Trustee, the redemption may be made subject to their receipt on or before the redemption date and such notice shall be of no effect unless such moneys are so received. Upon payment of
the redemption price, on and after the redemption date interest will cease to accrue on the Bonds or portions thereof called for redemption. 

The Company shall give the Trustee notice of the redemption price with respect to a redemption pursuant to the first paragraph of this Annex 1
promptly after the calculation thereof and the Trustee shall not be responsible for such calculation. 

  
 vi 

 ABBREVIATIONS 

The following abbreviations, when used in the inscription of the face of this instrument, shall be construed as though they were written out
in full according to applicable laws or regulations: 
  

			
	TEN COM –	  	as tenants in common
		
	TEN ENT –	  	as tenants by the entireties
		
	JT TEN –	  	as joint tenants with right of survivorship and
	  
 UNIT GIFT MIN ACT –
	  	 not as tenants in common

                     (Cust) Custodian

		  	                     (Minor) under Uniform
		  	 Gifts to Minors Act
  

		  	(State)

 Additional abbreviations may also be used though not in the above list. 

FOR VALUE RECEIVED the undersigned hereby sell(s), assign(s) and transfer(s) unto 

PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE: 

 

					
		  	  
	  	
	        	  	  
	  	

  
  

	
	 Please print or typewrite name and address

including postal zip code of assignee
  

	the within Bond and all rights thereunder, hereby irrevocably constituting and appointing                      attorney to transfer
said Bond on the books of the Company, with full power of substitution in the premises.
	  

Dated:                    

  
  

NOTICE: The signature to this assignment must correspond with the name as written upon the face of the within instrument in every particular,
without alteration or enlargement or any change whatever. The signature must be guaranteed by a commercial bank, a trust company or a member of the New York Stock Exchange. 

  
 viiEX-4.2

 Exhibit 4.2 
  

			
	REGISTERED	  	No.            

 ILL.C.C. No. 6701 ($         issued pursuant to Illinois Commerce Commission
Docket No. 16-0465) 
 ILL.C.C. No. 6743 ($         issued pursuant
to Illinois Commerce Commission Docket No. 17-0340) 
 MIDAMERICAN ENERGY COMPANY 

 
  

3.65% First Mortgage Bond due 2048 
  

 
 Unless this
certificate is presented by an authorized representative of The Depository Trust Company, a New York corporation (“DTC”), to the Company (as defined below) or its agent for registration of transfer, exchange or payment, and any certificate
issued is registered in the name of Cede & Co., or in such other name as is requested by an authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an authorized
representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch as the registered owner hereof, Cede & Co., has an interest herein. 

The following summary of terms is subject to the provisions set forth below: 

CUSIP: 595620 AS4 
 ORIGINAL ISSUE
DATE: February 1, 2018 
 PRINCIPAL AMOUNT:
$                 
 MATURITY DATE: August 1, 2048
(“Maturity”) 
 INTEREST RATE: 3.65% 

INTEREST PAYMENT DATES: February 1 and August 1, commencing August 1, 2018. 

RECORD DATES: January 15 and July 15. 

OPTIONAL REDEMPTION:     ☒  Yes    ☐  No 

MidAmerican Energy Company, an Iowa corporation (herein called the “Company”, which term includes any successor Person under the
Indenture referred to on the reverse hereof), for value received, hereby promises to pay to CEDE & CO. or registered assigns the principal amount of
                 ($                ), in such coin or currency of the United States of
America as at the time of payment is legal tender for payment of public and private debts, on the Maturity Date specified above and to pay interest thereon, in such coin or currency, from and including the Original Issue Date specified above, or
from and including the most recent Interest Payment Date specified above to which interest has been paid or duly provided for, as the case may be. Interest shall be paid in arrears semiannually on each Interest Payment Date in each year commencing
on August 1, 2018, at the per annum Interest Rate set forth above until Maturity and the principal hereof is paid or made available for payment. The interest so payable and punctually paid or duly provided for on any Interest Payment Date will,
as provided in the Indenture, be paid to the Person in whose name this global Bond is registered at the close of 

 
business on the Record Date specified above (whether or not a Business Day) next preceding such Interest Payment Date; provided, however, that interest payable on the Maturity Date
or, if applicable, upon redemption, shall be payable to the Person to whom principal shall be payable. Payment of the principal of and any premium and interest on this global Bond shall be made on or before 10:30 a.m., New York City time or such
other time as shall be agreed upon between the Trustee and the Depositary, of the day on which such payment is due, by wire transfer into the account specified by the Depositary; provided, however, that as a condition to the payment at
the Maturity Date or upon redemption of any part of the principal of and any applicable premium on this global Bond, the Depositary shall surrender, or cause to be surrendered, this global Bond to the Trustee. The Company will pay any administrative
costs imposed by banks in connection with making payments by wire transfer, but not any tax or other governmental charge imposed on the Holder of this global Bond. 

Under certain circumstances, this global Bond is exchangeable in whole or from time to time in part for a definitive individual Bond or Bonds,
with the same Original Issue Date, Maturity Date, Interest Rate and redemption and other provisions as provided herein or in the Indenture. 

REFERENCE IS HEREBY MADE TO THE FURTHER PROVISIONS OF THIS GLOBAL BOND SET FORTH IN FULL ON THE REVERSE HEREOF, WHICH FURTHER PROVISIONS SHALL
FOR ALL PURPOSES HAVE THE SAME EFFECT AS IF SET FORTH IN FULL AT THIS PLACE. 
 Unless the certificate of authentication hereon has been
executed by the Trustee referred to on the reverse hereof, directly or through an Authenticating Agent, by manual signature of an authorized signatory, this global Bond shall not be entitled to any benefit under the Indenture or be valid or
obligatory for any purpose. 

  
 ii 

 IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed. 

Dated: February 1, 2018 
  

			
	MIDAMERICAN ENERGY COMPANY
		
	By:	 	  

		 	Name: James C. Galt
		 	Title: Treasurer

  

			
	Attest:
		
	By:	 	  

		 	Name: Paul J. Leighton
		 	Title: Vice President, Secretary and
		 	          Assistant General Counsel

 TRUSTEE’S CERTIFICATE OF AUTHENTICATION 

This is one of the Bonds of the series designated therein referred to in the within-mentioned Indenture. 

 

			
	THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., as Trustee
		
	By:	 	  

		 	Name: R. Tarnas
		 	Authorized Signatory

 [REVERSE OF NOTE] 

MIDAMERICAN ENERGY COMPANY 

3.65% First Mortgage Bond due 2048 

This global Bond is one of, and a global security which represents Bonds which are part of, the duly authorized 3.65% First Mortgage Bonds due
2048 of the Company (herein called the “Bonds”), issued under an Indenture dated as of September 9, 2013, as amended and supplemented (herein called the “Indenture”), between the Company and The Bank of New York Mellon Trust
Company, N.A., as Trustee (herein called the “Trustee,” which term includes any successor Trustee under the Indenture), to which Indenture and all indentures supplemental thereto reference is hereby made for a statement of the respective
rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Holders, and of the terms upon which the Bonds are, and are to be, authenticated and delivered. 

Interest on this global Bond will be payable on the Interest Payment Date or Interest Payment Dates as specified on the face hereof and, in
either case, at Maturity. Unless otherwise specified on the face hereof, payments on this global Bond with respect to any particular Interest Payment Date, redemption date or the Maturity Date will include interest accrued from and including the
applicable Original Issue Date, or from and including the most recent Interest Payment Date to which interest has been paid or duly provided for, to but excluding the particular Interest Payment Date, redemption date or the Maturity Date. Interest
on this global Bond will be computed and paid on the basis of a 360-day year of twelve 30-day months. 

All percentages resulting from any calculation with respect to this global Bond will be rounded, if necessary, to the nearest one
hundred-thousandth of a percentage point (with five one-millionths of a percentage point rounded upward) and all dollar amounts used in or resulting from any such calculation with respect to this global Bond
will be rounded to the nearest cent (with one-half cent being rounded upward). 
 “Business
Day” means, unless otherwise specified on the face hereof, any Monday, Tuesday, Wednesday, Thursday or Friday that in the City of New York, New York is not a day on which banking institutions are authorized or obligated by law or executive
order to close. In any case when any Interest Payment Date, redemption date, or Maturity Date of any Bond shall not be a Business Day at any Place of Payment, then (notwithstanding any other provision of the Indenture or of the Bonds) payment of
interest or principal (and premium, if any) need not be made on such date, but may be made on the next succeeding Business Day with the same force and effect as if made on the Interest Payment Date, redemption date or at the Maturity Date, provided
that no interest shall accrue for the period from and after such Interest Payment Date, redemption date or Maturity Date, as the case may be. 

This global Bond is secured under the Company’s Mortgage, Security Agreement, Fixture Filing and Financing Statement between the Company
and The Bank of New York Mellon Trust Company, N.A., as amended and supplemented from time to time (the “Mortgage”). Reference is made to the Mortgage for a description of the property mortgaged and pledged and the nature and extent of the
security and to the Intercreditor and Collateral Trust Agreement among the Company, the Trustee and The Bank of New York Mellon Trust 

 
Company, N.A., as collateral trustee, and the Indenture for the rights of the holders of the Bonds and of the Trustee in respect thereof. Reference is made to the Indenture and the Mortgage for
the terms and conditions upon which the Bonds are secured and the circumstances under which additional bonds may be issued. 
 This global
Bond will be subject to redemption at the option of the Company on any date in whole or from time to time in part in increments of $2,000 or integral multiples of $1,000 in excess thereof, at the redemption prices specified in an annex attached to
this global Bond, plus accrued interest on the principal amount thereof to be redeemed to the redemption date, but payments due with respect to this global Bond prior to the redemption date will be paid to the Person in whose name this global Bond
is registered at the close of business on the relevant Record Date specified on the face hereof, all as provided in the Indenture. The Company may exercise such option by causing the Trustee to transmit a notice of such redemption, not less than 30
nor more than 60 days prior to the redemption date, in accordance with the provisions of the Indenture. In the event of redemption of this global Bond in part only, this global Bond will be cancelled and a new global Bond representing the unredeemed
portion hereof will be issued in the name of the Holder hereof. This global Bond is not subject to a sinking fund. 
 The Indenture permits,
with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders to be affected under the Indenture at any time by the Company and the Trustee with the
consent of the Holders of not less than a majority in principal amount of the Outstanding Bonds of all series that would be affected thereby. The Indenture also provides that the Holders of not less than a majority in principal amount of the
Outstanding Bonds of all affected series may on behalf of the Holders of all Bonds of such series waive certain existing Events of Default and their consequences. Any such consent or waiver of the Holder of any Bond shall bind every future Holder of
the same Bond and the Holder of every Bond issued upon the registration of transfer thereof or in exchange therefor or in lieu thereof in respect of anything done, omitted or suffered to be done by the Trustee or the Company in reliance thereon,
whether or not notation of such action is made upon such Bond. 
 As set forth in, and subject to, the provisions and limitations set forth
in the Indenture, the Holders of at least a majority in principal amount of the Outstanding Bonds of all series shall have any right to direct the time, method and place of conducting any proceeding for any remedy available to the Trustee, or
exercising any trust or power conferred on the Trustee. 
 THIS GLOBAL BOND IS A GLOBAL BOND REGISTERED IN THE NAME OF THE DEPOSITARY OR A
NOMINEE THEREOF AND, UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR THE INDIVIDUAL SECURITIES REPRESENTED HEREBY, THIS GLOBAL BOND MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF
THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY. 

  
 2 

 If at any time the Depositary for this global Bond notifies the Company that it is unwilling or
unable to continue as Depositary for this global Bond or if at any time the Depositary for this global Bond shall no longer be registered or in good standing under the Securities Exchange Act of 1934, as amended, or other applicable statute or
regulation, the Company shall appoint a successor Depositary with respect to this global Bond. If a successor Depositary for this global Bond is not appointed by the Company within 90 days after the Company receives such notice or becomes aware of
such condition, the Company shall execute, and the Trustee, upon receipt of a Company Order for the authentication and delivery of definitive Bonds of this series, shall authenticate and deliver Bonds of this series in definitive form in an
aggregate principal amount equal to the principal amount of this global Bond in exchange for this global Bond. 
 The Company may at any
time and in its sole discretion and subject to the procedures of the Depositary determine that the Bonds of this series shall no longer be represented by a global Bond. In such event the Company shall execute, and the Trustee, upon receipt of a
Company Order for the authentication and delivery of definitive Bonds of this series, shall authenticate and deliver, Bonds of this series in definitive registered form without coupons, in any authorized denominations, in an aggregate principal
amount equal to the principal amount of this global Bond, in exchange for this global Bond. 
 The Company may from time to time, without
the consent of Holders of the Bonds, create and issue further Bonds having the same terms and conditions as the Bonds in all respects, except for the Original Issue Date, issue price and, in some circumstances, the initial interest accrual date and
initial interest payment date. Additional Bonds issued in this manner will be consolidated with, and form a single series with, the Bonds and shall thereafter be deemed Bonds for all purposes. 

No reference herein to the Indenture and no provision of this global Bond or of the Indenture shall alter or impair the obligation of the
Company, which is absolute and unconditional, to pay the principal of and any premium and interest on this global Bond at the times, places and rate, and in the coin or currency, herein prescribed. 

The Indenture contains provisions for the satisfaction and discharge of the Indenture upon compliance by the Company with certain conditions
specified therein, which provisions apply to this global Bond. 
 The Indenture contains provisions for the defeasance and discharge of the
Indenture upon compliance by the Company with certain conditions specified therein, which provisions apply to this global Bond. 
 The
Company, the Trustee and any agent of the Company or the Trustee may treat the Person in whose name this global Bond is registered as the owner of this global Bond for the purpose of receiving payment of principal of (and premium, if any) and
interest on this global Bond and for all other purposes whatsoever, whether or not this global Bond be overdue, and neither the Company, the Trustee nor any agent of the Company or the Trustee shall be affected by notice to the contrary. 

  
 3 

 The Indenture and the Bonds are governed by and construed in accordance with the law of the State
of New York (including without limitation Section 5-1401 of the New York General Obligations Law or any successor to such statute), except to the extent that the TIA shall be applicable and except to the
extent that the law of any jurisdiction wherein any portion of the Mortgaged Property is located shall mandatorily govern the creation of a mortgage lien on and security interest in, or perfection, priority or enforcement of the Lien of the Mortgage
or exercise of remedies with respect to, such portion of the Mortgaged Property. 
 All terms used in this global Bond which are defined in
the Indenture but are not defined in this global Bond shall have the meanings assigned to them in the Indenture. 

  
 4 

 ANNEX 1 

OPTIONAL REDEMPTION PROVISIONS 

The Bonds will be redeemable, in whole or in part, at the Company’s option at any time or from time to time prior to maturity. Prior to
February 1, 2048 (the “2048 Par Call Date”), the Bonds will be redeemable, in whole at any time or in part from time to time, at a redemption price equal to the greater of (i) 100% of the principal amount of the Bonds being redeemed
and (ii) as determined by the Quotation Agent, the sum of the present values of the remaining scheduled payments of principal and interest on the Bonds being redeemed that would be due if the Maturity Date of such Bonds were the 2048 Par Call
Date (not including any portion of any payments of interest accrued to, but not including, the redemption date), discounted to the redemption date on a semi-annual basis (assuming a 360-day year consisting of
twelve 30-day months) at the Treasury Rate, plus 12.5 basis points (the “2048 Make-Whole Amount”); plus, in either case, accrued and unpaid interest on the principal amount of the Bonds being
redeemed to the redemption date. 
 On or after the 2048 Par Call Date, the Bonds will be redeemable at a redemption price equal to 100% of
the principal amount of the Bonds being redeemed, plus accrued and unpaid interest on the principal amount of the Bonds being redeemed to the redemption date. 

“Comparable Treasury Issue” means the United States Treasury security selected by an Independent Investment Banker as having a
maturity comparable to the remaining term of the Bonds to be redeemed (assuming that the Bonds matured on the 2048 Par Call Date) that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new
issues of corporate debt securities of comparable maturity to the remaining term of the Bonds. 
 “Comparable Treasury Price”
means, the Reference Treasury Dealer Quotation for such redemption date. 
 “Independent Investment Banker” means an investment
banking institution of international standing appointed by the Company. 
 “Quotation Agent” means the Reference Treasury Dealer.

 “Reference Treasury Dealer” means a primary United States government securities dealer in New York City appointed by the
Company. 
 “Reference Treasury Dealer Quotation” means, with respect to the Reference Treasury Dealer and any redemption date,
the average, as determined by the Company, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount and quoted in writing to the Company by such Reference Treasury Dealer at 5:00
p.m. on the third Business Day in New York City preceding such redemption date). 

  
 5 

 “Treasury Rate” means the rate per annum equal to the semi-annual equivalent or
interpolated (on a day-count basis) yield to maturity of the Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the
Comparable Treasury Price for that redemption date. 
 Notice of any redemption will be transmitted (or as long as the Bonds are represented
by one or more global Bonds, transmitted in accordance with DTC’s standard procedures therefor) at least 30 days but not more than 60 days before the redemption date to each holder of the Bonds to be redeemed. If, at the time notice of
redemption is given, the redemption moneys are not held by the Trustee, the redemption may be made subject to their receipt on or before the redemption date and such notice shall be of no effect unless such moneys are so received. Upon payment of
the redemption price, on and after the redemption date interest will cease to accrue on the Bonds or portions thereof called for redemption. 

The Company shall give the Trustee notice of the redemption price with respect to a redemption pursuant to the first paragraph of this Annex 1
promptly after the calculation thereof and the Trustee shall not be responsible for such calculation. 

  
 6 

 ABBREVIATIONS 

The following abbreviations, when used in the inscription of the face of this instrument, shall be construed as though they were written out
in full according to applicable laws or regulations: 
  

					
	 TEN COM –
	  	 as tenants in common
	  	
			
	 TEN ENT –
	  	 as tenants by the entireties
	  	
			
	 JT TEN –
	  	 as joint tenants with right of survivorship and
	  	
			
		  	 not as tenants in common
	  	
			
	 UNIT GIFT MIN ACT –
	  	
                   
 (Cust) Custodian
	  	
		  	
                   
  (Minor) under Uniform
	  	
		  	 Gifts to Minors Act
	  	
			
		  	  
 (State)
	  	

 Additional abbreviations may also be used though not in the above list. 

FOR VALUE RECEIVED the undersigned hereby sell(s), assign(s) and transfer(s) unto 

PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE: 

 
  

 
  

 
 Please print or typewrite name and
address 
 including postal zip code of assignee 
  

 
 the within Bond and all rights thereunder, hereby
irrevocably constituting and appointing                     attorney to transfer said Bond on the books of the Company, with full power of
substitution in the premises. 
 Dated:____________________ 
  

	
	  
 NOTICE: The signature to this
assignment must correspond with the name as written upon the face of the within instrument in every particular, without alteration or enlargement or any change whatever. The signature must be guaranteed by a commercial bank, a trust company or a
member of the New York Stock Exchange.

  
 7

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