# EDGAR Filing Document

**Accession Number:** 0000928576
**File Stem:** 0001193125-23-049776
**Filing Date:** 2023-2
**Character Count:** 157982
**Document Hash:** 90839ca2c9b452bc145b7f0b9e1cf539
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-23-049776.hdr.sgml**: 20230227

**ACCESSION NUMBER**: 0001193125-23-049776

**CONFORMED SUBMISSION TYPE**: POS AM

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20230227

**DATE AS OF CHANGE**: 20230227

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MIDAMERICAN ENERGY CO
- **CENTRAL INDEX KEY:** 0000928576
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTRIC SERVICES [4911]
- **IRS NUMBER:** 421425214
- **STATE OF INCORPORATION:** IA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** POS AM
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-257069
- **FILM NUMBER:** 23670184

**BUSINESS ADDRESS:**
- **STREET 1:** 666 GRAND AVE
- **STREET 2:** P O BOX 657
- **CITY:** DES MOINES
- **STATE:** IA
- **ZIP:** 50306-0657
- **BUSINESS PHONE:** 515-242-4300

**MAIL ADDRESS:**
- **STREET 1:** 666 GRAND AVENUE
- **CITY:** DES MOINES
- **STATE:** IA
- **ZIP:** 50309-2580

##### [**Table of Contents**](#toc)
**As filed with the Securities and Exchange Commission on February 27, 2023** 

**Registration No. 333-257069** 

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**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

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**POST-EFFECTIVE AMENDMENT NO. 2** 

**to** 

**Form S-3** 

**REGISTRATION STATEMENT** 

***UNDER***

***THE SECURITIES ACT OF 1933***

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## MIDAMERICAN ENERGY COMPANY
**(Exact name of registrant as specified in its charter)** 

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| | |
|:---|:---|
| **Iowa** | **42—1425214** |
| **(State or other jurisdiction of<br>incorporation or organization)** | **(I.R.S. Employer<br>Identification Number)** |

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**666 Grand Avenue** 

**Des Moines, Iowa 50309-2580** 

**(515) 242-4300** 

**(Address, including zip code, and telephone number, including area code, of registrant's principal executive offices)** 

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**Mark Lowe, Esq.** 

**Vice President and General Counsel** 

**MidAmerican Energy Company** 

**666 Grand Avenue** 

**Des Moines, Iowa 50309-2580** 

**(515) 242-4300** 

**(Name, address, including zip code, and telephone number, including area code, of agent for service)** 

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***Copy to:***

**J. Alan Bannister, Esq.** 

**Peter J. Hanlon, Esq.** 

**Gibson, Dunn & Crutcher LLP** 

**200 Park Avenue** 

**New York, New York 10166** 

**(212) 351-4000** 

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**Approximate date of commencement of proposed sale to the public**: From time to time after the effective date of this registration statement as determined by market conditions and other factors.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box: ☐

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, as amended (the "Securities Act"), other than securities offered only in connection with dividend or interest reinvestment plans, check the following box: ☒

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. ☐

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company" and "emerging growth company" in Rule 12b-2 of the Securities Exchange Act of 1934, as amended.

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| | | | |
|:---|:---|:---|:---|
| Large accelerated filer | ☐ | Accelerated filer | ☐ |
| Non-accelerated filer | ☒ | Smaller reporting company | ☐ |
|  |  | Emerging growth company | ☐ |

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If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

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The registrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment which specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act or until the registration statement shall become effective on such date as the Commission acting pursuant to said Section 8(a) may determine.

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##### [**Table of Contents**](#toc)
**Explanatory Note** 

This Post-Effective Amendment No. 2 to the Registration Statement on Form S-3 (Registration No. 333-257069) is being filed to reflect that MidAmerican Energy Company is no longer a well-known seasoned issuer, as defined in Rule 405 under the Securities Act of 1933, as amended. This filing is being made to convert the Registration Statement on Form S-3ASR, as amended (Registration No. 333-257069), to the proper submission type for a non-automatic shelf registration statement. All filing fees with respect to the registration of the securities registered hereunder were previously paid by MidAmerican Energy Company in connection with Post-Effective Amendment No. 1 to this Registration Statement, filed on February 23, 2023.

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##### [**Table of Contents**](#toc)
**The information in this prospectus is not complete and may be changed. We may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.** 

**Subject to Completion, dated February 27, 2023** 

Prospectus

## MIDAMERICAN ENERGY COMPANY
**$3,250,000,000** 

**of** 

**Unsecured Debt Securities** 

**First Mortgage Bonds** 

**Preferred Stock** 

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MidAmerican Energy Company, a Iowa corporation, may offer and sell Unsecured Debt Securities, First Mortgage Bonds or Preferred Stock (collectively, the "Securities") from time to time in one or more offerings. We may offer these Securities in one or more separate series, and in amounts, at prices and on terms we determine at or prior to the time of sale.

This prospectus provides you with a general description of these Securities. We will provide specific information about the offering and the terms of these Securities in one or more supplements to this prospectus. The supplements may also add, update or change information contained in this prospectus. We will not offer and sell our Securities unless this prospectus is accompanied by a prospectus supplement. You should read this prospectus and the related prospectus supplements carefully before you invest in these Securities.

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**Investing in the securities involves risks. See "[Risk Factors](#toc440040_3)" on page 2.** 

**Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.** 

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The securities will not be listed on any securities exchange or included in any automated quotation system. Currently, there is no public market for the securities.

This prospectus may not be used to sell securities unless accompanied by a prospectus supplement.

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**The date of this prospectus is , 2023** 

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##### [**Table of Contents**](#toc)
**TABLE OF CONTENTS** 

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| | |
|:---|:---|
|  | **Page** |
|  [MidAmerican Energy Company](#toc440040_1) | 1 |
|  [Forward-Looking Statements](#toc440040_2) | 1 |
|  [Risk Factors](#toc440040_3) | 2 |
|  [Use of Proceeds](#toc440040_4) | 3 |
|  [Description of Unsecured Debt Securities](#toc440040_5) | 3 |
|  [Description of First Mortgage Bonds](#toc440040_6) | 9 |
|  [Description of Preferred Stock](#toc440040_7) | 25 |
|  [Plan of Distribution](#toc440040_8) | 26 |
|  [About this Prospectus](#toc440040_9) | 28 |
|  [Where You Can Find More Information](#toc440040_10) | 28 |
|  [Incorporation by Reference](#toc440040_11) | 28 |
|  [Legal Matters](#toc440040_12) | 29 |
|  [Experts](#toc440040_13) | 29 |

---

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##### [**Table of Contents**](#toc)
**MidAmerican Energy Company** 

We are a United States regulated electric and natural gas utility company headquartered in Iowa that serves 0.8 million retail electric customers in portions of Iowa, Illinois and South Dakota and 0.8 million retail and transportation natural gas customers in portions of Iowa, South Dakota, Illinois and Nebraska. We are principally engaged in the business of generating, transmitting, distributing and selling electricity and in distributing, selling and transporting natural gas. Our service territory covers approximately 11,000 square miles. We have a diverse customer base consisting of urban and rural residential customers and a variety of commercial and industrial customers. Principal industries served by us include electronic data storage; processing and sales of food products; manufacturing, processing and fabrication of primary metals, farm and other non-electrical machinery; cement and gypsum products; and government. In addition to retail sales and natural gas transportation, we sell electricity principally to markets operated by regional transmission organizations and natural gas to other utilities and market participants on a wholesale basis. We are a transmission-owning member of the Midcontinent Independent System Operator, Inc. and participate in its capacity, energy and ancillary services markets.

Our headquarters and principal executive offices are located at 666 Grand Avenue, Des Moines, Iowa 50309-2580. Our telephone number is (515) 242-4300.

**Forward-Looking Statements** 

This prospectus contains or incorporates by reference statements that do not directly or exclusively relate to historical facts. These statements are "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, which we refer to as the "Securities Act," and Section 21E of the Securities Exchange Act of 1934, as amended, which we refer to as the "Exchange Act." Forward-looking statements can typically be identified by the use of forward-looking words, such as "will," "may," "could," "project," "believe," "anticipate," "expect," "estimate," "continue," "intend," "potential," "plan," "forecast" and similar terms. These statements are based upon our current intentions, assumptions, expectations and beliefs and are subject to risks, uncertainties and other important factors. Many of these factors are outside our control and could cause actual results to differ materially from those expressed or implied by such forward-looking statements. These factors include, among others:

• general economic, political and business conditions, as well as changes in, and compliance with, laws and
regulations, including income tax reform, initiatives regarding deregulation and restructuring of the utility industry and reliability and safety standards, affecting our operations or related industries;

• changes in, and compliance with, environmental laws, regulations, decisions and policies that could, among other
items, increase operating and capital costs, reduce facility output, accelerate facility retirements or delay facility construction or acquisition;

• the outcome of regulatory rate reviews and other proceedings conducted by regulatory agencies or other
governmental and legal bodies and our ability to recover costs through rates in a timely manner;

• changes in economic, industry, competition or weather conditions, as well as demographic trends, new technologies
and various conservation, energy efficiency and private generation measures and programs, that could affect customer growth and usage, electricity and natural gas supply or our ability to obtain long-term contracts with customers and suppliers;

• performance, availability and ongoing operation of our facilities, including facilities not operated by us, due
to the impacts of market conditions, outages and associated repairs, transmission constraints, weather, including wind, solar and hydroelectric conditions, and operating conditions;

• the effects of catastrophic and other unforeseen events, which may be caused by factors beyond our control or by
a breakdown or failure of our operating assets, including severe storms, floods, fires, extreme temperature events, wind events, earthquakes, explosions, landslides, an electromagnetic pulse, costly

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##### [**Table of Contents**](#toc)
litigation, wars (including, for example, Russia's invasion of Ukraine in February 2022), terrorism, pandemics, embargoes, and cyber security attacks, data security breaches, disruptions, or other malicious acts;

• the ability to economically obtain insurance coverage, or any insurance coverage at all, sufficient to cover
losses arising from catastrophic events;

• a high degree of variance between actual and forecasted load or generation that could impact our hedging strategy
and the cost of balancing our generation resources with our retail load obligations;

• changes in prices, availability and demand for wholesale electricity, coal, natural gas, other fuel sources and
fuel transportation that could have a significant impact on generating capacity and energy costs;

• the financial condition, creditworthiness and operational stability of our significant customers and suppliers;

• changes in business strategy or development plans;

• availability, terms and deployment of capital, including reductions in demand for investment-grade commercial
paper, debt securities and other sources of debt financing and volatility in interest rates;

• changes in our credit ratings;

• risks relating to nuclear generation, including unique operational, closure and decommissioning risks;

• the impact of certain contracts used to mitigate or manage volume, price and interest rate risk, including
increased collateral requirements, and changes in commodity prices, interest rates and other conditions that affect the fair value of certain contracts;

• the impact of inflation on costs and our ability to recover such costs in regulated rates;

• increases in employee healthcare costs;

• the impact of investment performance, certain participant elections such as lump sum distributions and changes in
interest rates, legislation, healthcare cost trends, mortality and morbidity on pension and other postretirement benefits expense and funding requirements;

• the impact of supply chain disruptions and workforce availability on our ongoing operations and its ability to
timely complete construction projects;

• unanticipated construction delays, changes in costs, receipt of required permits and authorizations, ability to
fund capital projects and other factors that could affect future facilities and infrastructure additions;

• the availability and price of natural gas in applicable geographic regions and demand for natural gas supply;

• the impact of new accounting guidance or changes in current accounting estimates and assumptions on our financial
results; and

• other business or investment considerations that may be disclosed from time to time in our filings with the
Securities and Exchange Commission, which we refer to as the "SEC," or in other publicly disseminated written documents.

We undertake no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. The foregoing factors should not be construed as exclusive.

**Risk Factors** 

Investing in the securities involves risks, including the risks described in the documents we incorporate by reference herein. You should carefully consider these risks and the other information contained or incorporated

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##### [**Table of Contents**](#toc)
by reference in this prospectus and any prospectus supplement before deciding to invest in the securities, including the risk factors incorporated by reference from our most recent Annual Report on Form 10-K and any subsequent Quarterly Reports on Form 10-Q or Current Reports on Form 8-K, as the same may be amended, supplemented or superseded from time to time by our subsequent filings under the Exchange Act. In addition, risks not known to us or that we believe are immaterial also may impair our business operations, financial condition and liquidity.

**Use of Proceeds** 

Unless otherwise specified in the applicable prospectus supplement, we will use the net proceeds from the sale of the securities described in this prospectus for general corporate purposes, which may include additions to working capital, reductions of our indebtedness, refinancing of existing securities and financing of capital expenditures. We may invest funds not immediately required for such purposes in short-term securities. The amount and timing of sales of the securities described in this prospectus will depend on market conditions and other factors, including the availability to us of other funds.

**Description of Unsecured Debt Securities** 

This section of this prospectus describes the general terms and provisions of the unsecured debt securities that we may offer. For a description of the first mortgage bonds that we may offer, see "Description of First Mortgage Bonds." For a description of the preferred stock that we may offer, see "Description of Preferred Stock." When we offer to sell a particular series of unsecured debt securities, we will describe the specific terms of the series in a prospectus supplement to this prospectus. We will also indicate in the applicable prospectus supplement whether the general terms and provisions described in this prospectus apply to a particular series of unsecured debt securities.

**General** 

We may issue senior unsecured debt securities or subordinated unsecured debt securities, in addition to first mortgage bonds described under "Description of First Mortgage Bonds." The senior unsecured debt securities will be our direct unsecured obligations and the subordinated unsecured debt securities will be our direct unsecured obligations. The senior unsecured debt securities and the subordinated unsecured debt securities will be issued under a senior unsecured indenture and a subordinated unsecured indenture, respectively, in each case between us and a trustee to be named in the applicable prospectus supplement. The following summary of certain provisions of the unsecured indentures does not purport to be complete and is qualified in its entirety by reference to the detailed provisions of the forms of unsecured indentures (copies of which are filed as exhibits to the registration statement of which this prospectus is a part). Except to the extent set forth in a prospectus supplement for a particular series of unsecured debt securities, the unsecured indentures, as amended or supplemented from time to time, will be substantially similar to the forms of unsecured indentures filed as exhibits to the registration statement and described below.

**Prospectus Supplement** 

A prospectus supplement relating to a series of unsecured debt securities being offered will include specific terms relating to the offering. These terms may include:

• the title of the series of unsecured debt securities;

• whether the series of unsecured debt securities are senior unsecured debt securities or subordinated unsecured
debt securities;

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##### [**Table of Contents**](#toc)
• the aggregate principal amount (or any limit on the aggregate principal amount) of the series of unsecured debt
securities and, if any unsecured debt securities of a series are to be issued at a discount from their face amount, the method of computing the accretion of such discount;

• if other than the entire principal amount thereof, the portion of the principal amount of the unsecured debt
securities payable upon declaration of acceleration of the maturity thereof;

• the rate or rates of interest, if any, which will be borne by such unsecured debt securities, which may be fixed
or variable;

• the date from which interest will accrue;

• the record date for interest payable on the unsecured debt securities;

• the maturity date of the unsecured debt securities;

• the dates when, places where and manner in which principal, premium, if any, and interest will be payable;

• the securities registrar if other than the trustee;

• the terms of any mandatory redemption (including any sinking fund requirement) or any redemption at our option;

• the terms of any redemption at the option of holders of the unsecured debt securities;

• the denominations in which the unsecured debt securities are issuable;

• whether the unsecured debt securities will be represented by a global security and the terms of any such global
security;

• the currency or currencies (including any composite currency) in which principal or interest or both may be paid;

• any events of default, covenants or defined terms in addition to or in lieu of those set forth in the applicable
unsecured indenture;

• whether and upon what terms the unsecured debt securities may be defeased;

• any special tax implications of the unsecured debt securities; and

• any other terms in addition to or different from those contained in the applicable unsecured indenture.

The unsecured debt securities may bear interest at a fixed or a floating rate, or may bear no interest. Unsecured debt securities bearing no interest or bearing interest at a rate below the prevailing market rate at the time of issuance may be deemed to be issued at a discount below their stated principal amount. Further, the holders of any unsecured debt securities as to which we have the right to defer interest may be allocated interest income for federal and state income tax purposes without receiving equivalent, or any, interest payments. Material federal income tax consequences may result from any such deemed original issue discount or interest deferrals. Any such material federal income tax consequences will be described in the applicable prospectus supplement.

**Ranking of Senior Unsecured Debt Securities; Ranking of Subordinated Unsecured Debt Securities** 

The senior unsecured debt securities will rank senior to our subordinated unsecured debt securities and any of our other indebtedness that by its terms is subordinated in right of payment to the senior unsecured debt securities. In addition, the senior unsecured debt securities will rank *pari passu* in right of payment with our other senior indebtedness, but will effectively rank junior to our senior secured indebtedness to the extent of the value of the collateral securing such senior secured indebtedness.

The subordinated unsecured debt securities will be subordinate and junior in right of payment to the senior unsecured debt securities, the first mortgage bonds described in this prospectus and all of our other current and

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future senior debt. As of December 31, 2022, we had outstanding $6.53 billion of first mortgage bonds (including $180 million of first mortgage bonds pledged as security for a like amount of tax-exempt debt issued on our behalf) and $1.05 billion of other senior debt secured equally and ratably with such first mortgage bonds as described under "Description of First Mortgage Bonds—Security and Priority." Unless otherwise specified in the applicable prospectus supplement, no payments on the subordinated unsecured debt securities may be made if (1) any senior debt is not paid when due or (2) the maturity of any senior debt has been accelerated because of a default. Upon any distribution of our assets to creditors upon a bankruptcy, insolvency, liquidation, reorganization or similar event, all amounts due on our senior debt must be paid before any payments are made on the subordinated unsecured debt securities.

Neither the subordinated unsecured indenture nor the senior unsecured indenture will limit the amount of senior debt (whether secured or unsecured) that we can incur, and the mortgage bond indenture will not limit the amount of senior unsecured debt that we can incur.

**Global Securities** 

The unsecured debt securities of any series may be represented, in whole or in part, by one or more global securities. Each global security will:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• be registered in the name of a depositary or nominee thereof that we will identify in the applicable prospectus
supplement;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• be deposited with the depositary or nominee or custodian; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• bear any required legends.

As long as the depositary, or its nominee, is the registered holder of a global security, the depositary or nominee will be considered the sole owner and holder of the unsecured debt securities represented by the global security for all purposes under the unsecured debt securities and the applicable unsecured indenture. Except in the limited circumstances described below, owners of beneficial interests in a global security:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• will not be entitled to have the unsecured debt securities registered in their names;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• will not be entitled to physical delivery of certificated unsecured debt securities; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• will not be considered to be holders of those unsecured debt securities under the unsecured debt securities or
the applicable unsecured indenture.

Payments on a global security will be made to the depositary or its nominee as the holder of the global security. Some jurisdictions have laws that require that certain purchasers of securities take physical delivery of the securities in definitive form. These laws may impair the ability to transfer beneficial interests in a global security.

Institutions that have accounts with the depositary or its nominee are referred to as "participants." Ownership of beneficial interests in a global security will be limited to participants and to persons that may hold beneficial interests through participants. The depositary will credit, on its book-entry registration and transfer system, the respective principal amounts of unsecured debt securities represented by the global security to the accounts of its participants.

Ownership of beneficial interests in a global security will be shown on and effected through records maintained by the depositary, with respect to participants' interests, or any participant, with respect to interests held by participants on behalf of other persons.

Payments, transfers, exchanges and other matters relating to beneficial interests in a global security will be subject to policies and procedures of the depositary. The depositary policies and procedures may change from time to time. Neither we nor the trustee will have any responsibility or liability for the depositary's or any participant's records with respect to beneficial interests in a global security.

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**Exchange of Global Securities for Certificated Securities** 

Except as otherwise may be set forth in the applicable prospectus supplement, the global securities may be exchanged for unsecured debt securities in certificated form only in the following circumstances:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• if the depositary notifies us that it is unwilling or unable to continue as depositary for the global securities,
or if the depositary is no longer registered as a clearing agency under the Exchange Act and we do not appoint a replacement depositary within 90 days;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• an event of default under the applicable unsecured indenture occurs; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• if we determine, subject to the procedures of the depositary, that a series of unsecured debt securities will no
longer be represented by global securities.

If any global securities are exchangeable for certificated securities as described above, we will execute, and the trustee will authenticate upon our order, certificated securities of like tenor and terms in certificated form in an aggregate principal amount equal to the principal amount of such global securities. These certificated securities will be delivered to persons specified by the depositary in exchange for the beneficial interests in the global securities being exchanged.

**Redemption and Repayment** 

The applicable prospectus supplement will specify the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• if the unsecured debt securities are subject to any sinking fund and the terms of any such sinking fund;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• if we may elect to redeem the unsecured debt securities prior to maturity and the terms of any such optional
redemption;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• if we will be required to redeem the unsecured debt securities prior to maturity upon the occurrence of certain
events and the terms of any such mandatory redemption; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• if the holders of the unsecured debt securities will have the right to repayment of the unsecured debt securities
prior to maturity and the terms of any such optional repayment.

If we elect or are required to redeem unsecured debt securities, a redemption notice will be sent to each holder of unsecured debt securities to be redeemed at least 30 but not more than 60 days prior to the redemption date. The redemption notice will include the following: (1) the redemption date, the places of redemption and the redemption price; (2) a statement that payment of the redemption price will be made on surrender of the unsecured debt securities at the places of redemption; (3) a statement that accrued interest to the redemption date will be paid as specified in the notice and that after the redemption date interest will cease to accrue; (4) if less than all of the unsecured debt securities of a series are to be redeemed, the particular unsecured debt securities or portions thereof to be redeemed; (5) if any unsecured debt securities are to be redeemed in part only, the portion of the unsecured debt securities to be redeemed and a statement that, upon surrender of the unsecured debt securities for redemption, new unsecured debt securities having the same terms will be issued in an amount equal to the unredeemed portion; and (6) if applicable, a statement that redemption is subject to the receipt by the trustee prior to the redemption date of sufficient funds to make such redemption.

If notice of redemption is given as specified above, the unsecured debt securities called for redemption will become due and payable on the date and at the places stated in the notice at the applicable redemption price, together with accrued interest to the redemption date. After the redemption date, the unsecured debt securities subject to redemption will cease to bear interest and will not be entitled to the benefits of the applicable unsecured indenture, other than the right to receive payment of the redemption price together with accrued interest to the redemption date.

If unsecured debt securities are repayable at the option of the holders prior to maturity, a holder that elects to have its unsecured debt securities repaid will be required to deliver such unsecured debt securities (or a guarantee

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of delivery from an eligible institution) to the trustee at least 30 but not more than 45 days prior to the repayment date. For unsecured debt securities represented by global securities held by the depositary, the repayment option may be exercised by a direct participant in the depositary on behalf of the beneficial owner by sending written notice to the trustee (specifying certain information regarding the unsecured debt securities to be repaid) at least 30 but not more than 60 days prior to the repayment date.

**Covenants** 

Except as described in the applicable prospectus supplement, the unsecured debt securities will be subject to covenants including the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a covenant that requires us to maintain an office for payment and registration of transfer or exchange of the
unsecured debt securities in New York, New York;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a covenant that requires us to notify the trustee in writing of any event of default under an unsecured indenture
within five days after we become aware of such event of default;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a covenant that requires us to maintain our corporate existence, rights and franchises, unless the maintenance of
such rights and franchises is no longer desirable in the conduct of our business; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a covenant that prohibits us from consolidating with or merging with or into any other person or conveying,
transferring or leasing all or substantially all of our property or assets to any other person, unless the surviving company or transferee, as applicable, is a U.S. company and assumes all of our obligations under the unsecured indenture.

The covenant described immediately above includes a phrase relating to a conveyance, transfer or lease of "all or substantially all" of our property or assets. Although there is a limited body of case law interpreting the phrase "all or substantially all," there is no precise established definition of the phrase under applicable law. Accordingly, the nature and extent of the restriction on our ability to convey, transfer or lease all or substantially all of our property or assets, and the protections provided to the holders of unsecured debt securities by such restriction, may be uncertain.

**Events of Default** 

Except as described in the applicable prospectus supplement, the following will constitute events of default under the applicable unsecured indenture:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• we fail to pay interest on the applicable series of unsecured debt securities when due and such failure continues
for 30 days;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• we fail to pay principal of, and premium, if any, on the applicable series of unsecured debt securities when due;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• we breach any other covenant or representation in the applicable unsecured indenture and such breach continues
for 90 days (such period to be extended if we are diligently pursuing a cure) after we receive a notice of default with respect thereto;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a decree or order is entered against us in an involuntary bankruptcy proceeding and is not vacated in 90 days, or
a similar involuntary event relating to our bankruptcy or insolvency occurs and continues for 90 days; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• we commence a voluntary bankruptcy case or take similar voluntary actions relating to our bankruptcy or
insolvency.

Upon the occurrence of an event of default under an unsecured indenture, the holders of a majority in aggregate principal amount of the applicable series of unsecured debt securities may declare such unsecured debt

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securities to be immediately due and payable. Holders of a majority in principal amount of such unsecured debt securities may rescind the acceleration so long as the conditions set forth in the applicable unsecured indenture have been satisfied.

Prior to acceleration, holders of a majority in aggregate principal amount of the applicable series of unsecured debt securities may waive an event of default, other than (1) an event of default related to non-payment of principal, premium, if any, or interest and (2) an event of default related to a covenant or other provision of the applicable unsecured indenture that cannot be modified without the consent of each holder of unsecured debt securities affected thereby.

The trustee shall be under no obligation to exercise any of the rights or powers vested in it by the applicable unsecured indenture at the request or direction of any of the holders pursuant to the applicable unsecured indenture, unless such holders shall have offered to the trustee security or indemnity satisfactory to the trustee against the costs, expenses and liabilities which might be incurred by it in compliance with such request or direction.

**Modifications to the Unsecured Indenture** 

Except as otherwise set forth in the applicable prospectus supplement, the unsecured debt securities will be subject to provisions which allow us and the trustee to amend the applicable unsecured indenture without the consent of any holder of unsecured debt securities for the following purposes:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to cure ambiguities or to cure, correct or supplement any defective or inconsistent provisions, provided that the
amended provision shall not adversely affect the interests of holders of outstanding unsecured debt securities in any material respect;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to add covenants, events of default or collateral, or to surrender a right or power conferred upon us in the
applicable unsecured indenture;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to establish the form of additional unsecured debt securities in accordance with the terms of the applicable
unsecured indenture;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to evidence the succession of another company to us and the assumption by the successor of our obligations under
the applicable unsecured indenture;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to grant to or confer upon the trustee for the benefit of the holders any additional rights, remedies, powers or
authority;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to permit the trustee to comply with any duties imposed upon it by law;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to specify further the duties and responsibilities of, and to define further the relationships among, the trustee
and any authenticating agent or paying agent for the unsecured debt securities; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to change or eliminate any of the provisions of the applicable unsecured indenture, so long as the change or
elimination becomes effective only when there are no unsecured debt securities outstanding that were created prior to the execution of the supplemental indenture or other document evidencing such change or elimination.

Except as set forth in the applicable prospectus supplement, the unsecured debt securities will be subject to certain provisions which allow us and the trustee to amend the applicable unsecured indenture for any other purpose with the consent of holders of a majority in aggregate principal amount of the applicable series of unsecured debt securities, other than amendments which:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• change the stated maturity of the applicable series of unsecured debt securities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• reduce the principal amount of the applicable series of unsecured debt securities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• reduce the interest rate for the applicable series of unsecured debt securities;

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• extend the dates for scheduled payments of principal and interest on the applicable series of unsecured debt
securities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• impair the right of a holder of the applicable series of unsecured debt securities to institute suit for the
payment of its unsecured debt securities; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• reduce the percentage of holders of unsecured debt securities required to consent to amendments or waive defaults
under the applicable unsecured indenture.

The items described in the first five bullets above will require the consent of all holders of senior unsecured debt securities or subordinated unsecured debt securities, as the case may be, affected by the amendment. The item described in the last bullet above will require the consent of all holders of senior unsecured debt securities or subordinated unsecured debt securities, as the case may be.

**Governing Law** 

The senior unsecured indenture and the subordinated unsecured indenture will be governed by the laws of the State of New York.

**Description of First Mortgage Bonds** 

This section of this prospectus describes the general terms and provisions of the first mortgage bonds that we may offer. We may issue first mortgage bonds from time to time in one or more series, and when we offer to sell a particular series of first mortgage bonds, we will describe the specific terms of the series in a prospectus supplement to this prospectus. We will also indicate in the applicable prospectus supplement whether the general terms and provisions described in this prospectus apply to a particular series of first mortgage bonds.

**General** 

The first mortgage bonds will be issued under an Indenture, dated as of September 9, 2013, which we refer to as the "Indenture," between us and The Bank of New York Mellon Trust Company, N.A., as trustee, which we refer to as the "Bond Trustee," as supplemented and amended by a first supplemental indenture between us and the Bond Trustee dated as of September 19, 2013, which we refer to as the "First Supplemental Mortgage Bond Indenture," and we refer to the Indenture, as so supplemented by the First Supplemental Mortgage Bond Indenture as the "Mortgage Bond Indenture." The Mortgage Bond Indenture does not limit the aggregate principal amount of first mortgage bonds that may be issued, subject to meeting certain conditions to issuance, including those described under "—Issuance of First Mortgage Bonds."

The first mortgage bonds will be secured by a lien on certain of our property pursuant to a Mortgage, Security Agreement, Fixture Filing and Financing Statement, dated as of September 9, 2013, which we refer to as the "Mortgage," from us to The Bank of New York Mellon Trust Company, N.A., as collateral trustee, which we refer to as the "Collateral Trustee." This Mortgage constitutes a mortgage lien, subject to permissible encumbrances, as described below under "—Security and Priority—Permissible Encumbrances," as well as exceptions and exclusions as described below under "—Security and Priority—Excepted Property," on all of our electric generating, transmission and distribution property within the State of Iowa. See "—Security and Priority."

Each series of first mortgage bonds will be secured equally and ratably with each of our outstanding first series of mortgage bonds issued under the Mortgage Bond Indenture as well as certain of our other outstanding senior debt entitled by the terms thereof to be equally and ratably secured with our first mortgage bonds. Such other outstanding senior debt was issued prior to the date of this prospectus pursuant to indentures that we entered in 2002 and 2006. As of December 31, 2022, we had outstanding $6.53 billion of first mortgage bonds

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(including $180 million of first mortgage bonds pledged as security for a like amount of tax-exempt debt issued on our behalf) and $1.05 billion of such senior debt which were secured by the Mortgaged Property (as defined below under "—Security and Priority"). We refer to such outstanding senior debt as our "Equal and Ratable Notes." Collateral administration is governed by the Mortgage Bond Indenture and an Intercreditor and Collateral Trust Agreement, dated as of September 9, 2013, which we refer to as the "Collateral Trust Agreement," among us, the Bond Trustee and the Collateral Trustee. Under the Collateral Trust Agreement, the Collateral Trustee has agreed to hold the trust estate (including all of the Collateral Trustee's right, title and interest under the Mortgage) for the equal and ratable benefit of the holders of the first mortgage bonds and the holders of the Equal and Ratable Notes.

The Collateral Trust Agreement also provides that, except in the circumstances described below under "—Remedies" and "—Release and Substitution of Property" with respect to the continuation of a Triggering Event (defined below) and upon prior notice by the Requisite Secured Parties (defined below), the Collateral Trustee will follow the directions of the Bond Trustee for, among other things, the release of property subject to the Mortgage, the application of cash held by the Collateral Trustee and the exercise of remedies under the Mortgage, in each case with such directions given only in accordance with the applicable provisions of the Indenture.

Further, under the Collateral Trust Agreement, the Collateral Trustee has agreed that the proceeds of any collection, sale or other realization of any part of the shared collateral pursuant to the Mortgage or other shared collateral document will be held in trust by the Collateral Trustee and applied first, to the payment of any unpaid fees of the Collateral Trustee and all taxes, assessments or Prior Liens and second, to the holders of all outstanding first mortgage bonds and the holders of all outstanding Equal and Ratable Notes, equally and ratably until paid in full.

The following summary of certain provisions of the Mortgage Bond Indenture, the Mortgage and the Collateral Trust Agreement does not purport to be complete and is qualified in its entirety by reference to the detailed provisions of the Mortgage Bond Indenture, the Mortgage and the Collateral Trust Agreement (copies of which are filed as exhibits to the registration statement of which this prospectus is a part). Capitalized terms used below are used as defined in the Mortgage Bond Indenture. Except to the extent set forth in a prospectus supplement for a particular series of first mortgage bonds, the Mortgage Bond Indenture, the Mortgage and the Collateral Trust Agreement, each as amended or supplemented from time to time, will be substantially similar to the forms of the Mortgage Bond Indenture, the Mortgage and the Collateral Trust Agreement filed as exhibits to the registration statement and described below.

**Prospectus Supplement** 

A prospectus supplement relating to a series of first mortgage bonds being offered will include specific terms relating to the offering. These terms may include:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the title of the series of first mortgage bonds;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the principal amount of the series of first mortgage bonds to be issued at any particular time;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• if other than the entire principal amount thereof, the portion of the principal amount of the first mortgage
bonds payable upon declaration of acceleration of the maturity thereof;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the rate of interest, if any, which will be borne by the first mortgage bonds, and if the interest rate is not a
fixed rate, the formula for determining the interest rate from time to time;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the date from which interest will accrue;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the record date for interest payable on the first mortgage bonds;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the maturity date of the first mortgage bonds;

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the dates when, places where and manner in which principal, premium, if any, and interest will be payable;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the terms of any mandatory redemption (including any sinking fund requirement) or any redemption at our option;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the terms of any redemption at the option of holders of the first mortgage bonds;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the denominations in which the first mortgage bonds are issuable;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• whether the first mortgage bonds will be represented by a global security and the terms of any such global
security;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the currency or currencies (including any composite currency) in which principal, premium, if any, or interest
may be paid;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• if payments of principal, premium, if any, or interest may be made in a currency other than that in which the
first mortgage bonds are stated to be payable, the terms and conditions applying to payments in that currency;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any events of default, covenants or defined terms in addition to or in lieu of those set forth in the Mortgage
Bond Indenture;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any special tax implications of the first mortgage bonds; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any other terms in addition to or different from those contained in the Mortgage Bond Indenture.

The first mortgage bonds may bear interest at a fixed or a floating rate, or may bear no interest. First mortgage bonds bearing no interest or bearing interest at a rate below the prevailing market rate at the time of issuance may be deemed to be issued at a discount below their stated principal amount. Further, the holders of any first mortgage bonds as to which we have the right to defer interest may be allocated interest income for federal and state income tax purposes without receiving equivalent, or any, interest payments. Material federal income tax consequences may result from any such deemed original issue discount or interest deferrals. Any such material federal income tax consequences will be described in the applicable prospectus supplement.

**Security and Priority** 

Each series of First Mortgage Bonds will be our direct, senior secured obligation ranking equally with our other existing and future secured and unsubordinated indebtedness.

Each series of first mortgage bonds will be secured, equally and ratably (except as to sinking funds and other analogous funds established for the exclusive benefit of a particular series) with our Equal and Ratable Notes and all of our other first mortgage bonds, regardless of series, from time to time issued and outstanding under the Mortgage Bond Indenture. As of December 31, 2022, we had outstanding $1.05 billion of Equal and Ratable Notes and $6.53 billion of first mortgage bonds (including $180 million of first mortgage bonds pledged as security for a like amount of tax-exempt debt issued on our behalf) which were secured by the Mortgaged Property. None of the unsecured debt securities which may be issued pursuant to the registration statement to which this base prospectus relates are entitled to be secured equally and ratably with our first mortgage bonds and Equal and Ratable Notes.

The Mortgage constitutes a first mortgage lien, subject to Permissible Encumbrances as described below, on substantially all of our electric generating, transmission and distribution property within the State of Iowa, other than property duly released from the lien of the Mortgage in accordance with the terms of the Mortgage Bond Indenture, the Mortgage and the Collateral Trust Agreement and other than Excepted Property, as described below. None of our gas distribution property within the State of Iowa or outside the State of Iowa or our other property located outside of the State of Iowa is currently subject to the lien of the Mortgage. However, we may

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enter into supplemental indentures with the Bond Trustee and supplemental mortgages in favor of the Collateral Trustee, in either case without the consent of the holders of first mortgage bonds, to subject such Excepted Property, at our option, to the lien of the Mortgage. This property would then constitute Bondable Property, as described below under "—Issuance of First Mortgage Bonds," and would therefore be available as a basis for the issuance of first mortgage bonds. We refer to our property that is subject, or intended to be subject, to the lien of the Mortgage as "Mortgaged Property."

We may obtain the release of property from the lien of the Mortgage from time to time, upon the bases provided for release in the Mortgage Bond Indenture, the Mortgage and the Collateral Trust Agreement. See "—Release and Substitution of Property."

The Mortgage provides that after-acquired property (other than Excepted Property) is subject to the lien of the Mortgage. However, in the case of consolidation or merger (whether or not we are the surviving company) or transfer of all or substantially all of the Mortgaged Property, the surviving company will not be required to grant a first lien mortgage upon any of the properties either owned or subsequently acquired by the surviving company. See "—Merger, Consolidation, Conveyance and Lease."

Our principal plants and properties, insofar as they constitute real estate, are owned in fee; certain of our other facilities are located on premises held by us under leases, permits or easements; and our electric transmission and distribution lines and systems (which constitute a substantial portion of our investment in physical property) are for the most part located over or under highways, streets, other public places or property owned by others for which permits, grants, easements, licenses or franchises (deemed satisfactory but without examination of underlying land titles) have been obtained.

*Excepted Property.* The lien of the Mortgage does not cover certain property, which we refer to as "Excepted Property," including:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• all cash, shares of stock, bonds, notes and other obligations and securities (i) not deposited, or required
to be deposited, with the Collateral Trustee by the express provisions of the Mortgage Bond Indenture, the Collateral Trust Agreement or the Mortgage, as applicable, or (ii) held by the Collateral Trustee for the benefit of a trustee for Equal
and Ratable Notes, as applicable;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• all bills, notes and other instruments, accounts receivable, claims, credits, judgments, demands, general
intangibles, choses in action, permits, franchises, patents, patent applications, patent licenses and other patent rights, trade names, trademarks, and all contracts, leases and agreements of whatsoever kind and nature, not pledged or required to be
pledged with the Collateral Trustee pursuant to the terms of the Mortgage Bond Indenture;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• all merchandise, equipment, spare parts, tools, materials, supplies and fuel held for sale or lease in the
ordinary course of business or for use or consumption in, or in the operation of, any properties of, or for the benefit of, us, or held in advance of use thereof for maintenance, replacement or fixed capital purposes;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• all electricity, gas, steam, water and other materials, products or services generated, manufactured, produced,
provided or purchased by us for sale or distribution or used or to be used by us;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• all railcars, aircraft, watercraft, automobiles, buses, trucks, tractors, trailers and similar vehicles and
movable equipment, and all components, spare parts, accessories, supplies and fuel used or to be used in connection with any of the foregoing;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• all office furniture and office equipment;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• all leasehold interests and leasehold improvements;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the last day of the term of any lease or leasehold now owned or hereafter acquired by us which is specifically
subjected to the lien of the Mortgage;

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• all timber, crops, sand, gravel, rocks, earth, natural gas, oil, coal, uranium and other minerals, products or
components of land and minerals, harvested, mined or extracted from or otherwise separated from the earth, or lying or being upon, within or under any properties of ours, including Mortgaged Property, and timber, crops, sand, gravel, rocks, earth,
natural gas, oil, coal, uranium and other land and mineral rights, leases and royalties and income therefrom, and rights to explore for minerals;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• except as the same may be specifically subjected to the lien of the Mortgage, all nuclear fuel, cores and
materials;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• all satellites and other equipment and materials used or to be used in outer space; all business machines; all
communications equipment; all computer equipment; all record production, storage and retrieval equipment; all telephone equipment; and all components, spare parts, accessories, programs and supplies used or to be used in connection with any of the
foregoing;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• all real or personal property which meets all of the following conditions:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• is not specifically described in Exhibit A to the Mortgage, as may be amended from time to time by supplements
thereto,

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• is not specifically subjected or required to be subjected to the lien of the Mortgage by any express provision of
the Mortgage or the Mortgage Bond Indenture, and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• is not an integral part of or used or to be used (i) as an integral part of our electric generating,
transmission and distribution operations in the State of Iowa, or (ii) in connection with the operation of any property specifically subjected or required to be subjected to the lien of the Mortgage by the express provisions of the Mortgage or
the Mortgage Bond Indenture;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• all real and personal property which is not in the State of Iowa;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our franchise to be a corporation; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• all books and records.

*Permissible Encumbrances.* The lien of the Mortgage is subject to Permissible Encumbrances. These include:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the lien of the Mortgage and other liens in favor of the Collateral Trustee and subject to the Collateral Trust
Agreement, and all liens and encumbrances junior thereto;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• liens for taxes or assessments by governmental bodies not yet due or the payment of which is being contested in
good faith by us;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any right of any municipal or other governmental body or agency, by virtue of any franchise, grant, license,
permit, contract or statute, to occupy, purchase or designate a purchaser of, or to order the sale of, any Mortgaged Property upon payment of reasonable compensation therefor, or to modify or terminate any franchise, grant, license, permit, contract
or other right, or to regulate our property and business;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• liens and charges incidental to our construction or current operations which are not delinquent or, whether or
not delinquent, are being contested in good faith by us;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• easements, leases, rights of way, restrictions, exceptions or reservations, and zoning ordinances, regulations
and restrictions, with respect to any of our property or rights of way, which do not, individually or in the aggregate, materially impair the use of such property or rights of way for the purposes for which such property or rights of way are held by
us;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• irregularities in or defects of title to any of our property or rights of way which do not materially impair the
use of such property or rights of way for the purposes for which such property or rights of way are held by us;

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• liens securing obligations neither (i) assumed by us nor (ii) on account of which we customarily pay
interest, directly or indirectly, existing upon real property, or rights in or relating to real property acquired by us for rights of way for lines, pipes, structures and appurtenances thereto;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• party-wall agreements and agreements for and obligations relating to the joint or common use of property owned
solely by us or owned by us in common or jointly with one or more Persons;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• liens securing indebtedness incurred by a Person, other than us, which indebtedness has been neither assumed nor
guaranteed by us nor on which we customarily pay interest, existing on property which we own jointly or in common with such Person or such Person and others, if there is an effective bar against partition of such property which would preclude the
sale of such property by such other Person or the holder of such lien without our consent;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any attachment, judgment and other similar lien arising in connection with court proceedings (i) in an
amount not in excess of the greater of $100,000,000 or 5% of the principal amount of the Bonds outstanding at the time such attachment, judgment or lien arises, or (ii) the execution of which has been stayed or which has been appealed and
secured, if necessary, by an appeal bond;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the burdens of any law or governmental rule, regulation, order or permit requiring us to maintain certain
facilities or to perform certain acts as a condition of its occupancy or use of, or interference with, any public or private lands or highways or any river, stream or other waters;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any duties or obligations of us to any federal, state or local or other governmental authority with respect to
any franchise, grant, license, permit or contract which affects any Mortgaged Property;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• liens in favor of a government or governmental entity securing (i) payments pursuant to a statute (other
than taxes and assessments), or (ii) indebtedness incurred to finance all or part of the purchase price or Cost of construction of the property subject to such lien;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any other liens or encumbrances of whatever nature or kind which, in the opinion of counsel, do not, individually
or in the aggregate, materially impair the lien of the Mortgage or the security afforded thereby for the benefit of the holders of first mortgage bonds;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any trustee's lien under the Mortgage Bond Indenture or under the Collateral Trust Agreement;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any Prior Lien if such Prior Lien shall not attach to any Mortgaged Property other than the Mortgaged Property
that was or became subject to the Prior Lien at the time of acquisition by us of such Mortgaged Property, other than pursuant to an after-acquired property clause of such Prior Lien; but, if we, as successor corporation, shall have executed a
supplemental indenture relating thereto, the extension of such Prior Lien to Mortgaged Property subsequently acquired by us shall be permitted;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• liens existing at the date of the Mortgage Bond Indenture;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• leases existing at the date of the Mortgage Bond Indenture affecting properties owned by us at such date and
renewals and extensions thereof; and leases affecting such properties entered into after such date or affecting properties acquired by us after such date which, in either case, (i) have respective terms of not more than ten years (including
extensions or renewals at the option of the tenant) or (ii) do not materially impair the use by us of such properties for the respective purposes for which they are held by us;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• liens vested in lessors, licensors, franchisors or permitters for rent or other amounts to become due or for
other obligations or acts to be performed, the payment of which rent or the performance of which other obligations or acts is required under leases, subleases, licenses, franchises or permits, so long as the payment of such rent or other amounts or
the performance of such other obligations or acts is not delinquent or is being contested in good faith and by appropriate proceedings; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any lien securing indebtedness for the payment, prepayment or redemption of which there have been irrevocably
deposited in trust with the trustee or other holder of such lien moneys and/or Investment

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Securities which (together with the interest reasonably expected to be earned from the investment and reinvestment in Investment Securities of the moneys and/or the principal of and interest on the Investment Securities so deposited) shall be sufficient for such purpose; provided, however, that if such indebtedness is to be redeemed or otherwise prepaid prior to the stated maturity thereof, any notice requisite to such redemption or prepayment shall have been given in accordance with the mortgage or other instrument creating such lien or irrevocable instructions to give such notice shall have been given to such trustee or other holder. <br>

"Prior Lien" means any mortgage, lien, charge, encumbrance, security interest on or in, or pledge of, any Mortgaged Property existing both at and immediately prior to the time of the acquisition by us of such Mortgaged Property, or created as a purchase money mortgage on such Mortgaged Property at the time of its acquisition by us, in each case ranking prior to or on a parity with the lien of the Mortgage.

The Mortgage Bond Indenture and Collateral Trust Agreement provide that the Bond Trustee and Collateral Trustee are entitled to payment, prior to the first mortgage bonds, of their reasonable compensation and expenses and indemnity against certain liabilities.

**Issuance of First Mortgage Bonds** 

An unlimited principal amount of first mortgage bonds may be issued under the Mortgage Bond Indenture, subject to the following conditions with respect to collateral coverage. The Mortgage Bond Indenture permits us to issue first mortgage bonds from time to time on any or a combination of three different bases:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. on the basis of Bondable Property (as described below) that has not become Bonded (as described below), in a
principal amount not exceeding 70% of the Cost or Fair Value (whichever is less) of that Bondable Property;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. on the basis of first mortgage bonds or Equal and Ratable Notes that have been purchased, paid, retired,
redeemed or otherwise discharged by us since the date of the Mortgage Bond Indenture or are then being purchased, paid, retired, redeemed or otherwise discharged by us, and which have not previously been Bonded, in a principal amount not exceeding
the principal amount of such purchased, paid, retired, redeemed or otherwise discharged first mortgage bonds or Equal and Ratable Notes; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3. on the basis of cash deposited with the Bond Trustee for this purpose (which we may later withdraw on the basis
of Bondable Property that has not become Bonded or on the basis of purchased, paid, retired, redeemed or otherwise discharged first mortgage bonds or Equal and Ratable Notes, as described below under "—Withdrawal or Application of Certain
Cash"), in a principal amount not exceeding the amount of such deposited cash.

"Bonded" or "Bonding" as applied to first mortgage bonds or Bondable Property generally means that first mortgage bonds or Bondable Property are within one or more of the following classes:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• (a) the aggregate amount of Bondable Property which has been used as a basis for the authentication and delivery
of first mortgage bonds or the withdrawal of cash and (b) an aggregate amount of Bondable Property with a value equal to 10/7 (ten sevenths) of the sum of (i) the aggregate principal amount of outstanding Equal and Ratable Notes and
(ii) the aggregate principal amount of any outstanding indebtedness secured by a Prior Lien (which we refer to as "Prior Lien Debt").

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• first mortgage bonds that have been purchased, paid, retired, redeemed or otherwise discharged by us and have
been used as a basis for the authentication and delivery of first mortgage bonds or the withdrawal of cash, and first mortgage bonds paid, purchased or redeemed with money used or applied by the Bond Trustee.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• first mortgage bonds which have been used as a basis for a waiver by us of our right to the authentication and
delivery of first mortgage bonds on the basis of first mortgage bonds that have been purchased, paid, retired, redeemed or otherwise discharged by us.

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• first mortgage bonds and Bondable Property which have been allocated or used as a basis for any credit or action
or pursuant to any provision of, or retired through the operation of, any sinking, improvement, maintenance, replacement or analogous fund for any series of first mortgage bonds; provided, however, that any such first mortgage bonds or Bondable
Property so allocated or used shall be reinstated as Unbonded when all of the first mortgage bonds of the series of first mortgage bonds in connection with such fund was established are retired first mortgage bonds. All Bondable Property which is
retired, abandoned, destroyed, released or otherwise disposed of will be deemed retired Bondable Property, but may later again become Bondable Property.

Bondable Property includes our property in Iowa used in our electric generating, transmission and distribution operations and may consist of: construction work in progress; property in the process of purchase to which we have legal title; our fractional and other undivided interests in property owned jointly or in common with other Persons; engineering, economic, environmental, financial, geological and legal and other analyses and surveys, data processing equipment and software associated with the acquisition or construction of property; paving, grading and other improvements to property owned by others but used by us; and certain property owned by us located on property owned by others, including governmental and municipal agencies. We may at our option subject to the lien of the Mortgage gas distribution property within the State of Iowa or outside the State of Iowa or our other property used in our electric generating, transmission and distribution operations located outside of the State of Iowa, which would then become Bondable Property.

The "amount" of Bondable Property is its Cost or Fair Value (whichever is less) determined in accordance with Generally Accepted Accounting Principles in effect at the date of the Mortgage Bond Indenture or, at our option, at the date of their determination. In determining Generally Accepted Accounting Principles, we may conform to accounting orders from any governmental regulatory commission.

Bonded Bondable Property generally consists of (i) Bondable Property which has been the basis of the authentication and delivery of outstanding first mortgage bonds, (ii) Bondable Property with a value equal to 10/7 (ten sevenths) of the aggregate principal amount of any outstanding Equal and Ratable Notes and any Prior Lien Debt, (iii) Bondable Property which has been used as the basis for the release of Mortgaged Property, (iv) Bondable Property which has been used as the basis for the withdrawal of cash and (v) Bondable Property allocated or used as a basis for certain credit or action or pursuant to certain sinking, improvement, maintenance, replacement or analogous fund for any series of first mortgage bonds.

It is expected that the first mortgage bonds will be issued on the basis of Bondable Property or the deposit of cash. As of December 31, 2022, we had pledged property having a value of approximately $24.1 billion as Bondable Property, which would allow us, in accordance with the limitations described above, to have outstanding approximately $16.9 billion in aggregate principal amount of first mortgage bonds and Equal and Ratable Notes. As of December 31, 2022, we had outstanding $6.53 billion in principal amount of first mortgage bonds (including $180 million of first mortgage bonds pledged as security for a like amount of tax-exempt debt issued on our behalf) and $1.05 billion in principal amount of Equal and Ratable Notes.

**Withdrawal or Application of Certain Cash** 

Proceeds of any insurance against loss by fire may be paid or remitted to us at our request, and the Mortgage Bond Indenture will not obligate us to use the proceeds to rebuild or repair damaged or destroyed Mortgaged Property, to the extent that the Fair Value of all Mortgaged Property after the damage or destruction of Mortgaged Property with respect to which the proceeds are payable is at least 10/7 (ten sevenths) of the sum of (x) the aggregate principal amount of outstanding first mortgage bonds *plus* (y) the aggregate principal amount of outstanding Equal and Ratable Notes *plus* (z) the aggregate principal amount of outstanding Prior Lien Debt. Such insurance proceeds must, however, be paid to the Collateral Trustee or to the Bond Trustee or other mortgagee under any Prior Lien on the Mortgaged Property damaged or destroyed to the extent that the Fair Value of all remaining Mortgaged Property does not equal the amount described in preceding sentence. Provided

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that no Triggering Event shall have occurred and be continuing, during the first 18 months after receipt of any such monies by the Collateral Trustee, we may be reimbursed from such insurance proceeds held by the Collateral Trustee for amounts spent to purchase or otherwise acquire property which becomes Mortgaged Property at the time of such purchase or acquisition, or to rebuild or renew the Mortgaged Property destroyed or damaged. Any such monies held by the Collateral Trustee and not applied to such reimbursement (or for which notice of our intention to apply such monies to the rebuilding or renewal then in progress) within the first 18 months after the Collateral Trustee's receipt will be held and applied as described below.

Unless we are in default in the payment of principal of or interest on any first mortgage bonds then outstanding or any other default under the Mortgage Bond Indenture has occurred and is continuing, cash that was deposited with the Bond Trustee as a basis for the issuance of first mortgage bonds generally may be withdrawn by us in an amount, subject to certain deductions and additions, up to 70% of the Cost or Fair Value (whichever is less) of Bondable Property that has not become Bonded.

In addition, unless we are in default in the payment of principal of or interest on any first mortgage bonds then outstanding or any other default under the Mortgage Bond Indenture has occurred and is continuing (and subject to the provisions of the Collateral Trust Agreement upon the occurrence and continuance of any Triggering Event described below), any cash that has been received or transferred to, and held by, the Bond Trustee or the Collateral Trustee under the Mortgage Bond Indenture or the Collateral Trust Agreement may be released or applied upon our request, including as follows:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• in the case of cash other than cash deposited by us as a basis for the issuance of first mortgage bonds, such
cash may be withdrawn by us to the extent of 100% of the lesser of the Cost or Fair Value of Unbonded Bondable Property;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• withdrawn by us in an amount equal to the principal amount of first mortgage bonds which we then have the right
to have authenticated and delivered on the basis of first mortgage bonds that have been purchased, paid, retired, redeemed or otherwise discharged by us;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• applied by the Bond Trustee to payment at maturity of outstanding first mortgage bonds or to the redemption of
any outstanding first mortgage bonds which are redeemable by their terms; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• applied to the purchase of first mortgage bonds, so long as no cash is applied to the payment of more than the
principal amount of any first mortgage bonds so purchased, except to the extent that the aggregate principal amount of all first mortgage bonds so purchased exceeds the aggregate cost for principal of and interest, brokerage and premium, if any, on
all first mortgage bonds so purchased.

Upon the occurrence and continuation of a Triggering Event, under the Collateral Trust Agreement, the Collateral Trustee will no longer be required to release or apply any cash held by it in as described in the preceding paragraph, unless directed by the Requisite Secured Parties.

**Release and Substitution of Property** 

Unless a default under the Mortgage Bond Indenture has occurred and is continuing, we generally may obtain the release from the lien of the Mortgage of any Mortgaged Property (which does not include cash held by the Bond Trustee):

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) if after such release, the Fair Value of the remaining Mortgaged Property equals or exceeds a sum equal to 10/7
(ten sevenths) of the sum of (x) the aggregate principal amount of outstanding first mortgage bonds *plus* (y) the aggregate principal amount of outstanding Equal and Ratable Notes *plus* (z) the aggregate principal amount
of outstanding Prior Lien Debt; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) if the Fair Value of the Mortgaged Property to be released is less than 1/2 of 1% of the sum of (x) the
aggregate principal amount of outstanding first mortgage bonds *plus* (y) the aggregate principal amount of outstanding Equal and Ratable Notes *plus* (z) the aggregate principal amount of outstanding Prior

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Lien Debt; *provided* that the aggregate Fair Value of Mortgaged Property released in this manner in any period of 12 consecutive calendar months does not exceed 1% of such sum; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3) on the basis of (a) the deposit of cash, Governmental Obligations or purchase money obligations,
(b) Bondable Property to be acquired by us with the proceeds of, or otherwise in connection with, such release or (c) a waiver of the right to issue first mortgage bonds on the basis of first mortgage bonds which have been purchased, paid,
retired, redeemed or otherwise discharged by us after the date of the Mortgage Bond Indenture, and have not previously been Bonded; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(4) if any Mortgaged Property is taken by exercise of the power of eminent domain, and all net proceeds of such
taking, purchase or sale (or, in the case of a sale or conveyance in anticipation thereof, an aggregate amount of Governmental Obligations or purchase money obligations having a fair value to us in cash), and cash, not less than the Fair Value of
the Mortgaged Property taken, purchased, sold or conveyed, together with all net sums payable for any damage to any Mortgaged Property by or in connection with any such taking, purchase, sale or conveyance, to the extent not deposited under a Prior
Lien with the trustee, mortgagee or other holder or such Prior Lien, are deposited with the Collateral Trustee, to be held and applied in accordance with the Collateral Trust Agreement and the Mortgage Bond Indenture. See "— Withdrawal or
Application of Certain Cash."

At any time when a default under the Mortgage Bond Indenture has occurred and is continuing, we may only obtain any such release if we satisfy such conditions in (1), (2), (3) or (4) above and we have the consent of the Bond Trustee, except that upon the continuance of a Triggering Event in connection with the exercise of remedies at the direction of the Requisite Secured Parties as described below under "—Remedies," we may not obtain such release unless directed by the Requisite Secured Parties and certain other conditions of the Collateral Trust Agreement are satisfied.

"Requisite Secured Parties" means the holders of a majority in principal amount of the sum of (x) all outstanding first mortgage bonds and (y) all outstanding Equal and Ratable Notes.

A "Triggering Event" would occur upon any of the following: (i) our failure to pay the principal amount of the Equal and Ratable Notes or first mortgage bonds of any series, upon final maturity, after expiration of any relevant grace period, (ii) a decree or order is entered against us in an involuntary bankruptcy proceeding and is not vacated in 90 days, or a similar involuntary event relating to our bankruptcy or insolvency occurs and continues for 90 days; or we petition for voluntary bankruptcy or take similar voluntary actions relating to our bankruptcy or insolvency, (iii) the acceleration of the principal amount of the first mortgage bonds or Equal and Ratable Notes or (iv) the issuance of any direction by the Bond Trustee to the Collateral Trustee, following the occurrence and during the continuance of any default under the Mortgage Bond Indenture, to commence exercise of foreclosure or similar remedies under the Mortgage and any other documents providing for collateral security with respect to the collateral that secures both the first mortgage bonds and the Equal and Ratable Notes.

In addition, at any time or from time to time, without any release or consent from the Bond Trustee, we may dispose of certain obsolete Mortgaged Property; grant certain rights of way and easements; abandon any Mortgaged Property and surrender any franchises under which we are operating that in the judgment of management are not necessary or important for the operation of the remaining Mortgaged Property; cancel or make changes in or alterations of or substitutions for leases; alter, change the location of, add to, repair or replace transmission and distribution equipment; cancel, make changes in or substitutions for or dispose of rights of way; and surrender or modify any franchise under which we may be operating if advisable in our judgment.

**Global Securities** 

The first mortgage bonds of any series may be represented, in whole or in part, by one or more global securities. Each global security will:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• be registered in the name of a depositary or nominee thereof that we will identify in the applicable prospectus
supplement;

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• be deposited with the depositary or nominee or custodian; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• bear any required legends.

As long as the depositary, or its nominee, is the registered holder of a global security, the depositary or nominee will be considered the sole owner and holder of the first mortgage bonds represented by the global security for all purposes under the first mortgage bonds and the Mortgage Bond Indenture. Except in the limited circumstances described below, owners of beneficial interests in a global security:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• will not be entitled to have the first mortgage bonds registered in their names;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• will not be entitled to physical delivery of certificated first mortgage bonds; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• will not be considered to be holders of those first mortgage bonds under the first mortgage bonds or the Mortgage
Bond Indenture.

Payments on a global security will be made to the depositary or its nominee as the holder of the global security. Some jurisdictions have laws that require that certain purchasers of securities take physical delivery of the securities in definitive form. These laws may impair the ability to transfer beneficial interests in a global security.

Institutions that have accounts with the depositary or its nominee are referred to as "participants." Ownership of beneficial interests in a global security will be limited to participants and to persons that may hold beneficial interests through participants. The depositary will credit, on its book-entry registration and transfer system, the respective principal amounts of first mortgage bonds represented by the global security to the accounts of its participants.

Ownership of beneficial interests in a global security will be shown on and effected through records maintained by the depositary, with respect to participants' interests, or any participant, with respect to interests held by participants on behalf of other persons.

Payments, transfers, exchanges and other matters relating to beneficial interests in a global security will be subject to policies and procedures of the depositary. The depositary policies and procedures may change from time to time. Neither we nor the Bond Trustee will have any responsibility or liability for the depositary's or any participant's records with respect to beneficial interests in a global security.

**Exchange of Global Securities for Certificated Securities** 

Except as otherwise may be set forth in the applicable prospectus supplement, the global securities may be exchanged for first mortgage bonds in certificated form only in the following circumstances:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• if the depositary notifies us that it is unwilling or unable to continue as depositary for the global securities,
or if the depositary is no longer registered as a clearing agency under the Securities Exchange Act and we do not appoint a replacement depositary within 90 days;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a default under the Mortgage Bond Indenture occurs; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• if we determine, subject to the procedures of the depositary, that a series of first mortgage bonds will no
longer be represented by global securities.

If any global securities are exchangeable for certificated securities as described above, we will execute, and the Bond Trustee will authenticate upon our order, certificated securities of like tenor and terms in certificated form in an aggregate principal amount equal to the principal amount of such global securities. These certificated securities will be delivered to persons specified by the depositary in exchange for the beneficial interests in the global securities being exchanged.

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**Redemption and Repayment** 

The applicable prospectus supplement will specify the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• if the first mortgage bonds are subject to any sinking fund and the terms of any such sinking fund;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• if we may elect to redeem the first mortgage bonds prior to maturity and the terms of any such optional
redemption;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• if we will be required to redeem the first mortgage bonds prior to maturity upon the occurrence of certain events
and the terms of any such mandatory redemption; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• if the holders of the first mortgage bonds will have the right to repayment of the first mortgage bonds prior to
maturity and the terms of any such optional repayment.

If we elect or are required to redeem first mortgage bonds, a redemption notice will be mailed to each holder of first mortgage bonds to be redeemed at least 30 but not more than 60 days prior to the redemption date unless otherwise provided in a supplemental indenture to the Mortgage Bond Indenture. The redemption notice will include the following: (1) the redemption date; (2) if less than all of the first mortgage bonds of a series are to be redeemed, the particular first mortgage bonds or portions thereof to be redeemed; and (3) if any first mortgage bonds are to be redeemed in part only, the portion of the first mortgage bonds to be redeemed.

If notice of redemption is given as specified above and, before the redemption date we deposit funds, obligations or instruments with the Bond Trustee sufficient to effect the redemption, then the first mortgage bonds called for redemption will become due and payable on the date stated in the redemption notice at the applicable redemption price, together with accrued interest to the redemption date. After the redemption date, the first mortgage bonds subject to redemption will cease to bear interest and will not be entitled to the benefits of the Mortgage Bond Indenture, other than the right to receive payment of the redemption price together with accrued interest to the redemption date.

**Covenants** 

Except as described in the applicable prospectus supplement, the first mortgage bonds will be subject to covenants including the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a covenant that the property subject to the Mortgage Bond Indenture is owned free and clear of all liens other
than Permissible Encumbrances, and that we will maintain and preserve the lien of the Mortgage so long as any first mortgage bond is outstanding, subject to Permissible Encumbrances;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a covenant that requires us promptly to record and file the Mortgage and all supplemental mortgages or notices in
respect thereof, as required by law to preserve and protect the security of the holders of first mortgage bonds and the rights of the Bond Trustee;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a covenant that requires us to insure the Mortgaged Property, with reasonable deductibles and retentions, against
loss by fire, to the extent customary, either through insurance companies we believe to be reputable or through creation of an insurance fund or other self insurance plan;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a covenant that requires us to maintain the Mortgaged Property in good repair, supplied with all necessary
equipment and to cause to be made all necessary repairs, renewals and improvements; provided that we may discontinue the operation of any Mortgaged Property if, in our judgment, desirable in the conduct of our business and not in any material
respect adverse to the interests of the holders of first mortgage bonds;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a covenant that requires us to pay taxes and assessments on the Mortgaged Property and to use our best efforts to
observe all governmental requirements as to any Mortgaged Property, and all covenants, terms and conditions upon which any Mortgaged Property is held, subject to an exception for taxes and assessments contested in good faith by appropriate
proceedings;

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a covenant that requires us to maintain our corporate existence (other than in the case of a permitted merger or
consolidation); and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a covenant that prohibits us from issuing any debt securities, other than first mortgage bonds, that are required
by their terms to be equally and ratably secured with the first mortgage bonds, except to replace any mutilated, lost, destroyed or stolen Equal and Ratable Notes or to effect exchanges and transfers of Equal and Ratable Notes.

**Events of Default** 

Except as described in the applicable prospectus supplement, the following will constitute defaults under the Mortgage Bond Indenture:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• we fail to pay the principal of, and premium, if any, on the first mortgage bonds when due and such failure
continues for three Business Days;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• we fail to pay interest on the first mortgage bonds when due and such failure continues for 90 days;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• we fail to pay any Prior Lien Debt in one or more series, in each case in an aggregate principal amount of
$100,000,000 or greater, after giving effect to any applicable grace period;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• we breach any other covenant or condition in the Mortgage Bond Indenture or any supplemental indenture thereto
and such breach continues for 90 days after we receive a written notice of default with respect thereto;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a decree or order is entered against us in an involuntary bankruptcy proceeding and is not vacated in 90 days, or
a similar involuntary event relating to our bankruptcy or insolvency occurs and continues for 90 days;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• we commence a voluntary bankruptcy case or take similar voluntary actions relating to our bankruptcy or
insolvency; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the occurrence of a Triggering Event, to the extent not otherwise a default under the Mortgage Bond Indenture.

The Bond Trustee is required to give the holders of the first mortgage bonds notice within 90 days of any default known to the Bond Trustee, unless the default has been cured or waived, except that in the event of a default described in the fourth bullet point above, no notice may be given until at least 60 days after its occurrence, and except that the Bond Trustee may withhold a notice of default (except for certain payment defaults) if the Bond Trustee in good faith determines that withholding notice is in the interest of the holders of first mortgage bonds.

We have agreed to furnish the Bond Trustee with an annual statement as to our compliance with the conditions and covenants in the Mortgage Bond Indenture. However, the Mortgage Bond Indenture does not otherwise require us to notify the Bond Trustee of any default.

**Remedies** 

Upon the occurrence of a default under the Mortgage Bond Indenture, the Bond Trustee may, and upon the written request of the holders of a majority in aggregate principal amount of the outstanding first mortgage bonds is required to, declare all outstanding first mortgage bonds to be immediately due and payable. However, holders of a majority in principal amount of the outstanding first mortgage bonds may rescind the acceleration if, before any sale of the Mortgaged Property pursuant to the Collateral Trust Agreement:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• all arrears of interest upon the first mortgage bonds, with interest on overdue interest installments at the
first mortgage bonds' respective rates of interest have been paid by or on our behalf or collected out of the Mortgaged Property; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• all defaults have been remedied.

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Prior to acceleration, holders of a majority in aggregate principal amount of the affected series of first mortgage bonds may waive a default under the Mortgage Bond Indenture, other than (1) a default related to non-payment of principal, premium, if any, or interest, (2) a default arising from the creation of a Prior Lien except Permissible Encumbrances or (3) a default related to a covenant or other provision of the Mortgage Bond Indenture that may not be modified without the consent of each holder of first mortgage bonds affected thereby.

Subject to the provisions of the Mortgage Bond Indenture relating to the duties of the Bond Trustee, if a default occurs and is continuing, the Bond Trustee will be under no obligation to exercise any of its rights or powers under the Mortgage Bond Indenture, the Mortgage and the Collateral Trust Agreement, unless the holders of a majority in principal amount of the outstanding first mortgage bonds have requested the Bond Trustee to take action and have offered to the Bond Trustee security or indemnity satisfactory to the Bond Trustee against its costs, expenses and liabilities.

No holder of first mortgage bonds has any right to institute any suit, action or proceeding for the foreclosure of the Mortgage, or for the appointment of a receiver or for any other remedy under the Indenture unless:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• holders of at least 33% of the outstanding first mortgage bonds have requested the Bond Trustee to take action
and offered the Bond Trustee security and indemnity satisfactory to it; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the Bond Trustee for a period of 60 days has refused or neglected to act on such notice.

Following the occurrence of a Triggering Event and the delivery of prior written notice to the Bond Trustee and the Collateral Trustee, the Requisite Secured Parties will have the right to direct the time, method and place of conducting any proceeding for the exercise of any right or remedy available to the Collateral Trustee with respect to the collateral that secures both the first mortgage bonds and the Equal and Ratable Notes, or of exercising any trust or power conferred on the Collateral Trustee, or for the taking of any other action authorized by the instruments comprising the Trust Estate and, thereafter, shall have the exclusive right and authority to direct the Collateral Trustee as to such matters.

During the continuance of a default under the Mortgage Bond Indenture, if the events described in the previous paragraph have not occurred, then:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the Bond Trustee, in its discretion from time to time (i) may direct the Collateral Trustee to sell, subject
to Prior Liens, all or any part of the Mortgaged Property as provided in the Mortgage or exercise any other rights or remedies provided for under the Mortgage; or (ii) may proceed, and may instruct the Collateral Agent to proceed, to protect
and to enforce the rights of the Bond Trustee and of the holders of first mortgage bonds under the Mortgage Bond Indenture and the rights of the Collateral Trustee and the holders of first mortgage bonds under the Mortgage and the Collateral Trust
Agreement, by suit in equity or at law, whether for the specific performance of any covenant or agreement in the Mortgage Bond Indenture, the Mortgage or the Collateral Trust Agreement (as applicable) or in aid of the execution of any power granted
by the Mortgage Bond Indenture, the Mortgage or the Collateral Trust Agreement or for the foreclosure of the Mortgage, or for the enforcement of any other appropriate legal or equitable remedy; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• upon the written direction of the holders of not less than a majority in aggregate principal amount of the
outstanding first mortgage bonds, the Bond Trustee is required to take all action so directed to protect and enforce its rights and the rights of the holders of first mortgage bonds under the Mortgage Bond Indenture, under the Mortgage and under the
Collateral Trust Agreement, or to take appropriate judicial proceedings by action, suit or otherwise; but the holders of not less than a majority in aggregate principal amount of the outstanding first mortgage bonds, from time to time have the right
to direct and control the actions of the Bond Trustee and the Bond Trustee generally has no obligation to take any such action unless so directed.

The Mortgage Bond Indenture also provides that a court in its discretion may require the plaintiff in any suit to enforce any right or remedy under the Mortgage Bond Indenture, the Mortgage or the Collateral Trust

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Agreement, or against the Bond Trustee or the Collateral Trustee, to file an undertaking to pay the costs of the suit. The Mortgage Bond Indenture further provides that the court may assess reasonable costs including attorneys' fees against any party to the suit. However, these provisions do not apply to a suit instituted by the Bond Trustee, a suit instated by a holder or holders of more than 10% in aggregate principal amount of the outstanding first mortgage bonds or to any suit instituted by any holder of first mortgage bonds for the payment of overdue principal, premium, if any, or interest.

**Merger, Consolidation, Conveyance and Lease** 

The Mortgage Bond Indenture does not prevent us from consolidating or merging with or into, or conveying, transferring or leasing all or substantially all of the Mortgaged Property to another person so long as, among other things:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the consolidation, merger, conveyance, transfer or lease is on terms which would not create any Prior Lien (other
than any Permissible Encumbrances) on the Mortgaged Property, or impair the Lien or security of the Mortgage or any of the rights or powers of the Bond Trustee or holders of the first mortgage bonds under the Indenture or the Bond Trustee under the
Mortgage or Collateral Trust Agreement;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• if the other party to the consolidation, merger, conveyance, transfer or lease has outstanding or proposes to
issue in connection with the transaction any secured obligations, to the lien of which any of the Mortgaged Property would be subject, the lien of the Mortgage is established as superior to the lien of such other secured obligations with respect to
the Mortgaged Property;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any such lease is made subject to immediate termination by us or the Bond Trustee during the continuance of a
default, and by the purchaser of the Mortgaged Property leased at any sale under the Mortgage Bond Indenture; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• in the event of a consolidation, merger, conveyance or transfer, or a lease with a term extending beyond the
maturity of any outstanding first mortgage bonds, the surviving company, or the person acquiring all or substantially all the Mortgaged Property, or the lessee, assumes the due and punctual payment of the principal of, premium, if any, and interest
on the first mortgage bonds and the observance of the covenants and conditions of the Mortgage Bond Indenture, the Mortgage and the Collateral Trust Agreement.

The Mortgage Bond Indenture requires that the surviving company either:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• grant a first (subject only to liens affecting our property prior to the consolidation, merger, conveyance,
transfer or lease) lien to the Collateral Trustee upon all its property then owned and which it may later acquire (other than Excepted Property), or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• confirm the prior lien of the Mortgage upon the Mortgaged Property and extend the lien of the Mortgage as a first
lien (or as a lien subject only to liens affecting our property prior to the consolidation, merger, conveyance, transfer or lease) to all property the surviving company later acquires or constructs that forms an integral part of any property subject
to the lien of the Mortgage and all renewals, replacements and additional property as the surviving company purchases, constructs or acquires and covenant to maintain the Mortgaged Property in good repair, working order and condition and to comply
with the covenants and conditions of the Mortgage Bond Indenture.

The covenant described immediately above includes a phrase relating to a conveyance, transfer or lease of "all or substantially all" of our property or assets. Although there is a limited body of case law interpreting the phrase "all or substantially all," there is no precise established definition of the phrase under applicable law. Accordingly, the nature and extent of the restriction on our ability to convey, transfer or lease all or substantially all of the Mortgaged Property, and the protections provided to the holders of first mortgage bonds by such restriction, may be uncertain. However, the Mortgage Bond Indenture provides that any conveyance, transfer or

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lease of Mortgaged Property, following which the Fair Value of the Mortgaged Property we retain exceeds 10/7 (ten sevenths) of the sum of (x) the aggregate principal amount of outstanding first mortgage bonds *plus* (y) the aggregate principal amount of outstanding Equal and Ratable Notes *plus* (z) the aggregate principal amount of outstanding Prior Lien Debt, will be deemed not to constitute a conveyance, transfer or lease of all or substantially all of the Mortgaged Property.

**Modifications to the Mortgage Bond Indenture, Mortgage or Collateral Trust Agreement** 

Except as otherwise set forth in the applicable prospectus supplement, the first mortgage bonds will be subject to provisions which allow us and the Bond Trustee to amend the Mortgage Bond Indenture, and allow us and the Collateral Trustee to amend the Mortgage, in each case without the consent of any holder of first mortgage bonds for the following purposes:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to amplify or correct the description of any property pledged or intended to be pledged by the Mortgage;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to subject additional property to the lien of the Mortgage, including property outside the State of Iowa or which
is an integral part of or used or to be used as an integral part of our gas distribution operations;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to close the Mortgage Bond Indenture against, or provide limitations with respect to, the issuance of additional
first mortgage bonds;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to establish and create series of first mortgage bonds and establish their terms;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to provide alternative methods or forms for evidencing and recording ownership of first mortgage bonds;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to reflect changes in Generally Accepted Accounting Principles;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to comply with the rules or regulations of any national securities exchange on which any first mortgage bonds may
be listed;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to modify the provisions of the Mortgage Bond Indenture as necessary to continue its qualification under the
Trust Indenture Act of 1939, as amended;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to evidence the succession of another company to us and the assumption by the successor of our obligations under
the Mortgage Bond Indenture, the Mortgage and the Collateral Trust Agreement;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to change or eliminate any of the provisions of the Mortgage Bond Indenture, but if the change or elimination
would materially adversely affect the rights of the holders of any outstanding first mortgage bonds against us or our property, then the change or elimination shall become effective only with respect to those first mortgage bonds issued thereafter;
and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• to cure ambiguities or to cure, correct or supplement any defective or inconsistent provisions, provided that the
amended provision shall not materially impair the security of the Mortgage Bond Indenture or the Mortgage or materially adversely affect the outstanding first mortgage bonds.

In addition, without the consent of any holder of first mortgage bonds, the Bond Trustee, as requested by us, may direct the Collateral Trustee to enter into amendments with us to the Collateral Trust Agreement to: (i) cure any ambiguity, omission, defect or inconsistency, (ii) add guarantors or other parties so long as such addition will not materially impair the security of the Mortgage Bond Indenture or materially adversely affect the outstanding first mortgage bonds, (iii) further secure the first mortgage bonds and, as applicable, the Equal and Ratable Notes, (iv) provide more fully or clearly for the equal and ratable sharing of the lien of the Mortgage in accordance with the intent of the Collateral Trust Agreement, (v) remove any series of the Equal and Ratable Notes from the equal and ratable sharing in the lien of the Mortgage, in whole or in part, if such sharing is no longer required under the indenture governing such series, (vi) otherwise remove, lessen or release any lien or

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rights provided for the benefit of the Equal and Ratable Notes (or any portion thereof) to the extent we determine that such lien or rights are not required to be granted or (vii) make any other change which will not materially impair the security of the Mortgage Bond Indenture or materially adversely affect the outstanding first mortgage bonds. Under the Mortgage Bond Indenture, we and the Collateral Trustee may amend the Mortgage without the consent of any holder of first mortgage bonds to make changes corresponding to changes permitted to be made in the Collateral Trust Agreement according to the preceding clauses (iii) through (vii). Under the Collateral Trust Agreement, no such amendment, supplement or waiver to the Collateral Trust Agreement or the Mortgage that would materially and adversely affect the rights of the holders of the Equal and Ratable Notes to equally and ratably share in the security provided for in the Collateral Trust Agreement and the Mortgage may be made unless joined in, or consented to in writing, by the respective indenture trustees for each series of Equal and Ratable Notes.

Except as set forth in the applicable prospectus supplement, the first mortgage bonds will be subject to provisions which allow us and the Bond Trustee to amend the Mortgage Bond Indenture and the Mortgage for any other purpose with the consent of holders of a majority in aggregate principal amount of the first mortgage bonds which would be affected by the action to be taken, or if one or more series of first mortgage bonds would be materially adversely affected by the action to be taken, with the consent of the holders of not less than 60% in aggregate principal amount of the first mortgage bonds of such series so affected (which need not include 60% of the aggregate principal amount of the first mortgage bonds of each such series), other than amendments which:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• extend the fixed maturity of any first mortgage bonds;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• change any terms of any sinking, improvement, maintenance, replacement or analogous fund or conversion rights
with respect to any first mortgage bonds;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• reduce the rate or extend the time of payment of interest on any first mortgage bonds;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• reduce the principal amount of any first mortgage bonds;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• limit the right of a holder of first mortgage bonds to institute suit for the enforcement of payment of its first
mortgage bonds;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• reduce the percentage of principal amount outstanding first mortgage bonds, required to consent to any such
supplemental indenture or supplemental mortgage; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• permit us to create any Prior Lien (except in the case of a permitted merger or consolidation with another person
owning property subject to a Prior Lien).

The items described in the bullets above will require the consent of all holders of first mortgage bonds affected by the amendment.

**Governing Law** 

The Mortgage Bond Indenture will be governed by the laws of the State of New York except to the extent that the law of any jurisdiction where property subject to the lien of the Mortgage is located shall mandatorily govern matters as to security interests.

**Description of Preferred Stock** 

We have the authority under our articles of incorporation to issue 100,000,000 shares of preferred stock, no par value. As of December 31, 2022, we had no shares of preferred stock outstanding.

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We may issue, from time to time, shares of one or more series or classes of our preferred stock with such preferences and designations as our board of directors may determine. The following summary description sets forth some of the general terms of the preferred stock. We will describe the specific terms of any series of preferred stock that we issue in a prospectus supplement. To the extent the description contained in the prospectus supplement differs from this summary description, you should rely on the information in the prospectus supplement. You should also read our articles of incorporation and bylaws before purchasing the preferred stock.

Our board of directors is authorized to determine for each series of preferred stock, and the applicable prospectus supplement will set forth with respect to any such series:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the designation of such series and the number of shares that constitute such series;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the dividend rate (or the method of calculation thereof), if any, on the shares of such series and the priority
as to payment of dividends with respect to other classes or series of our capital stock;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the dividend periods (or the method of calculating the dividend periods);

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the voting rights of the shares, if any;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the liquidation preference and the priority as to payment of such liquidation preference with respect to the
classes or series of preferred stock and any other rights of the shares of such series if we liquidate, dissolve or wind-up our affairs;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• whether and on what terms we can redeem or repurchase the shares of preferred stock;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• whether the preferred stock of such series will have the benefit of a sinking fund;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• whether the preferred stock of such series will be convertible into our common stock or other securities, and, if
applicable, the conversion price or rate, the conversion period and any other terms of conversion;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• whether the preferred stock of such series will be subject to preemption rights; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any other material terms.

The shares of a series of preferred stock will not have any preferences, voting powers or relative, participating, optional or other special rights except as set forth above or in the applicable prospectus supplement, our articles of incorporation or the applicable certificate of designation or as otherwise required by law.

Except as set forth in the applicable prospectus supplement, no series of preferred stock will be redeemable or receive the benefit of a sinking fund. If we voluntarily or involuntarily liquidate, dissolve or wind up our affairs, the holders of each series of preferred stock will be entitled to receive the liquidation preference per share specified in the prospectus supplement plus any accrued and unpaid dividends. Holders of preferred stock will be entitled to receive these amounts before any distribution is made to the holders of common stock, but only after the liquidation preference has been fully paid on any shares of senior ranking preferred stock, if any. Neither the par value nor the liquidation preference is indicative of the price at which the preferred stock will actually trade on or after the date of issuance.

We will designate the transfer agent for each series of preferred stock in the applicable prospectus supplement.

**Plan of Distribution** 

We may offer and sell or exchange the securities described in this prospectus:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• through agents;

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##### [**Table of Contents**](#toc)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• through one or more underwriters;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• through one or more dealers;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• directly to one or more purchasers (through a specific bidding or auction process or otherwise); or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• through a combination of any such methods of sale.

The distribution of the securities described in this prospectus may be effected from time to time in one or more transactions either:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• at a fixed price or prices, which may be changed;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• at market prices prevailing at the time of sale;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• at prices relating to such prevailing market prices;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• at negotiated prices; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• at a fixed exchange ratio in return for other of our securities.

Offers to purchase or exchange the securities may be solicited by agents designated by us from time to time. Any such agent will be named, and any commissions payable by us to such agent will be set forth, in the applicable prospectus supplement. Unless otherwise indicated in the applicable prospectus supplement, any such agent will be acting on a best efforts basis for the period of its appointment. Any such agent may be deemed to be an underwriter, as that term is defined in the Securities Act, of the securities so offered and sold.

If an underwriter or underwriters are utilized in the sale of the securities, we will execute an underwriting agreement with such underwriter or underwriters at the time an agreement for such sale is reached. The names of the specific managing underwriter or underwriters, as well as any other underwriters, and the terms of the transactions, including compensation of the underwriters and dealers, which may be in the form of discounts, concessions or commissions, if any, will be set forth in the applicable prospectus supplement, which will be used by the underwriters to make resales of the securities.

If a dealer is utilized in the sale of the securities, we or an underwriter will sell such securities to the dealer as principal. The dealer may then resell such securities to the public at varying prices to be determined by such dealer at the time of resale. The name of the dealer and the terms of the transactions will be set forth in the applicable prospectus supplement relating thereto.

Offers to purchase or exchange the securities may be solicited directly by us and sales or exchanges thereof may be made by us directly to institutional investors or others. The terms of any such sales, including the terms of any bidding or auction process, if utilized, will be described in the applicable prospectus supplement.

We may enter into agreements with agents, underwriters and dealers under which we agree to indemnify them against certain liabilities, including liabilities under the Securities Act, or to contribute to payments they may be required to make in respect thereof. The terms and conditions of such indemnification or contribution will be described in the applicable prospectus supplement. Certain of the agents, underwriters or dealers, or their affiliates, may be customers of, engage in transactions with or perform services for us in the ordinary course of business.

In compliance with the guidelines of the Financial Industry Regulatory Authority, Inc., which we refer to as "FINRA," the maximum consideration or discount to be received by any FINRA member or independent broker dealer may not exceed 8% of the aggregate proceeds of the offering.

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**About this Prospectus** 

This prospectus is part of a registration statement that we have filed with the SEC, using a "shelf" registration process. Using this process, we may offer the securities described in this prospectus, either separately or with other securities registered hereunder, in one or more offerings. This prospectus provides you with a general description of the securities we may offer. Each time we offer securities, we will provide a prospectus supplement to this prospectus. The prospectus supplement will describe the specific terms of that offering. The prospectus supplement may also add, update or change the information contained in this prospectus. If there is any inconsistency between the information in this prospectus and any prospectus supplement, you should rely on the information in the prospectus supplement. Please carefully read this prospectus and the applicable prospectus supplement, in addition to the information contained in the documents we refer you to under the heading "Where You Can Find More Information."

**Where You Can Find More Information** 

We file annual, quarterly and special reports and other information with the SEC. The SEC maintains an Internet site that contains reports, proxy and information statements, and other information regarding issuers, like us, that file electronically with the SEC. Our SEC filings are also available to the public from the SEC's Internet site at http://www.sec.gov.

This prospectus is part of a registration statement we have filed with the SEC relating to the securities described in this prospectus. As permitted by SEC rules, this prospectus does not contain all of the information set forth in the registration statement. You should read the registration statement for further information about us and the securities described in this prospectus.

**Incorporation by Reference** 

The SEC allows us to "incorporate by reference" the information that we file with it, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is considered to be part of this prospectus. The information filed by us with the SEC in the future will automatically update and supersede this information.

We incorporate by reference our filings listed below and any additional documents that we may file with the SEC pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act on or after the date we file the registration statement that contains this prospectus and prior to the termination of any offering, including all such documents we may file with the SEC after the date of the initial registration statement and prior to the effectiveness of the registration statement; except we are not incorporating by reference any information furnished (but not filed) under Item 2.02 or Item 7.01 of any Current Report on Form 8-K, unless specifically noted below or in a prospectus supplement:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our Annual Report on [Form 10-K](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/0000928576/000108131623000005/bhe-20221231.htm) for the fiscal year ended December 31, 2022.

You may request a copy of these filings, at no cost, by writing or calling us at the following address or telephone number:

Treasurer

MidAmerican Energy Company

666 Grand Avenue

Des Moines, Iowa 50309-2580

(515) 242-4300

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You should rely only on the information incorporated by reference or provided in this prospectus or any prospectus supplement. We have not authorized anyone else to provide you with different information. You should not assume that the information in this prospectus or any prospectus supplement is accurate as of any date other than the date on the front of such document.

**Legal Matters** 

The validity of the securities described in this prospectus will be passed upon for us by Gibson, Dunn & Crutcher LLP, New York, New York. Certain matters involving the laws of Iowa will be passed upon for us by Jeffery B. Erb, Esq.

**Experts** 

The financial statements of MidAmerican Energy Company, incorporated by reference in this Prospectus, have been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their report. Such financial statements are incorporated by reference in reliance upon the report of such firm given upon their authority as experts in accounting and auditing.

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**PART II** 

**INFORMATION NOT REQUIRED IN PROSPECTUS** 

***Item 14. Other Expenses of Issuance and Distribution***

The following table sets forth the costs and expenses payable by MidAmerican Energy Company in connection with the issuance and distribution of the securities being registered. All amounts are estimates.

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| | |
|:---|:---|
|  | **Amount<br>to<br>be paid** |
|  Registration Fee | $358150 |
|  Fees and expenses of qualification under state securities laws (including legal fees) | + |
|  Printing Expenses | + |
|  Legal Fees and Expenses | + |
|  Accounting Fees and Expenses | + |
|  Rating Agency Fees | + |
|  Trustee Fees and Expenses | + |
|  Miscellaneous Expenses Total | + |
|  | $+ |

---

+ Estimated expenses are not presently known and will be reflected in any applicable prospectus supplement.

***Item 15. Indemnification of Directors and Officers***

Sections 490.850-490.856 and 490.858(6) of the Iowa Business Corporation Act permit corporations organized thereunder to indemnify directors, officers and employees against liability under certain circumstances. The Restated Articles of Incorporation, as amended, and the Restated Bylaws, as amended, of MidAmerican Energy Company provide for indemnification of directors, officers and employees to the full extent provided by the Iowa Business Corporation Act. The Articles of Incorporation and the Bylaws state that the indemnification provided therein shall not be deemed exclusive. MidAmerican Energy Company may, but has currently elected not to, purchase and maintain insurance on behalf of any person who is or was a director, officer, employee or agent of MidAmerican Energy Company or another corporation, partnership, joint venture, trust or other enterprise against any expense, liability or loss, whether or not MidAmerican Energy Company would have the power to indemnify such person against such expense, liability or loss under the Iowa Business Corporation Act. MidAmerican Energy Company may also enter into indemnification agreements with its directors and officers to further assure such persons indemnification as permitted by Iowa law.

As permitted by Section 490.202 of the Iowa Business Corporation Act, the Articles of Incorporation of MidAmerican Energy Company provide that no director shall have personal liability to MidAmerican Energy Company or its shareholders for monetary damages for breach of fiduciary duty as a director, except for liability: (1) for any breach of the director's duty of loyalty to MidAmerican Energy Company or its shareholders; (2) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law; (3) for any transaction from which the director derives an improper personal benefit; or (4) under Section 490.833, or a successor provision, of the Iowa Business Corporation Act.

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***Item 16. Exhibits***

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| | |
|:---|:---|
| **Exhibits<br>No.** | **Description of Exhibit** |
| &nbsp;&nbsp;&nbsp;&nbsp;1.1\* | Form of Underwriting Agreement. |
| &nbsp;&nbsp;&nbsp;&nbsp;4.1\*\* | [Form of Indenture (Senior Unsecured Debt Securities) (Filed as Exhibit 4.1 to MidAmerican Energy Company's Registration Statement on Form S-3 (No. 333-192077), filed November 4, 2013).](http://www.sec.gov/Archives/edgar/data/928576/000119312513425120/d610617dex41.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;4.2\*\* | [Form of Indenture (Subordinated Unsecured Debt Securities) (Filed as Exhibit 4.2 to MidAmerican Energy Company's Registration Statement on Form S-3 (No. 333-192077), filed November 4, 2013).](http://www.sec.gov/Archives/edgar/data/928576/000119312513425120/d610617dex42.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;4.3\*\* | [Indenture (First Mortgage Bonds), dated as of September 9, 2013 (Filed as Exhibit 4.1 to MidAmerican Energy Company's Current Report on Form 8-K dated September 13, 2013, Commission File No. 333-15387).](http://www.sec.gov/Archives/edgar/data/928576/000119312513366706/d595559dex41.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;4.4\*\* | [First Supplemental Indenture, dated as of September 19, 2013 (Filed as Exhibit 4.1 to MidAmerican Energy Company's Current Report on Form 8-K dated September 19, 2013, Commission File No. 333-15387).](http://www.sec.gov/Archives/edgar/data/928576/000119312513371825/d600959dex41.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;4.5\*\* | [Intercreditor and Collateral Trust Agreement, dated as of September 9, 2013 (Filed as Exhibit 4.3 to MidAmerican Energy Company's Current Report on Form 8-K dated September 13, 2013, Commission File No. 333-15387).](http://www.sec.gov/Archives/edgar/data/928576/000119312513366706/d595559dex43.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;4.6\*\* | [Mortgage, Security Agreement, Fixture Filing and Financing Statement, dated as of September 9, 2013 (Filed as Exhibit 4.2 to MidAmerican Energy Company's Current Report on Form 8-K dated September 13, 2013, Commission File No. 333-15387).](http://www.sec.gov/Archives/edgar/data/928576/000119312513366706/d595559dex42.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;4.7\*\* | [Amendment Number 1 to First Supplemental Indenture, dated as of April 3, 2014, between MidAmerican Energy Company and The Bank of New York Mellon Trust Company, N.A., as trustee (Filed as Exhibit 4.1 to MidAmerican Energy Company's Current Report on Form 8-K dated April 3, 2014, Commission File No. 333-15387).](http://www.sec.gov/Archives/edgar/data/928576/000119312514129793/d703266dex41.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;4.8\*\* | [Second Supplemental Indenture, dated as of April 3, 2014, between MidAmerican Energy Company and The Bank of New York Mellon Trust Company, N.A., as trustee (Filed as Exhibit 4.2 to MidAmerican Energy Company's Current Report on Form 8-K dated April 3, 2014, Commission File No. 333-15387).](http://www.sec.gov/Archives/edgar/data/928576/000119312514129793/d703266dex42.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;4.9\*\* | [Amendment Number 1 to Second Supplemental Indenture, dated as of October 15, 2015, between MidAmerican Energy Company and The Bank of New York Mellon Trust Company, N.A., as trustee (Filed as Exhibit 4.1 to MidAmerican Energy Company's Current Report on Form 8-K dated October 15, 2015, Commission File No. 333-15387).](http://www.sec.gov/Archives/edgar/data/928576/000093041315004001/c82596_ex4-1.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;4.10\*\* | [Third Supplemental Indenture, dated as of October 15, 2015, between MidAmerican Energy Company and The Bank of New York Mellon Trust Company, N.A., as trustee (Filed as Exhibit 4.2 to MidAmerican Energy Company's Current Report on Form 8-K dated October 15, 2015, Commission File No. 333-15387).](http://www.sec.gov/Archives/edgar/data/928576/000093041315004001/c82596_ex4-2.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;4.11\*\* | [Fourth Supplemental Indenture, dated as of December 8, 2016, between MidAmerican Energy Company and The Bank of New York Mellon Trust Company, N.A., as trustee (Filed as Exhibit 4.96 to MidAmerican Energy Company's Annual Report on Form 10-K for the year ended December 31, 2016, Commission File No. 333-15387).](http://www.sec.gov/Archives/edgar/data/71180/000108131617000005/llcmec123116ex496.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;4.12\*\* | [Fifth Supplemental Indenture, dated as of February 1, 2017, between MidAmerican Energy Company and The Bank of New York Mellon Trust Company, N.A., as trustee (Filed as Exhibit 4.1 to MidAmerican Energy Company's Current Report on Form 8-K dated February 1, 2017, Commission File No. 333-15387).](http://www.sec.gov/Archives/edgar/data/928576/000119312517027661/d310434dex41.htm) |

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| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp;&nbsp;4.13\*\* | [Sixth Supplemental Indenture, dated as of December 14, 2017, between MidAmerican Energy Company and The Bank of New York Mellon Trust Company, N.A., as trustee (Filed as Exhibit 4.91 to MidAmerican Energy Company's Annual Report on Form 10-K for the year ended December 31, 2017, Commission File No. 333-15387).](http://www.sec.gov/Archives/edgar/data/71180/000108131618000014/llcmec123117ex491.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;4.14\*\* | [Seventh Supplemental Indenture, dated as of February 1, 2018, between MidAmerican Energy Company and The Bank of New York Mellon Trust Company, N.A., as trustee (Filed as Exhibit 4.1 to MidAmerican Energy Company's Current Report on Form 8-K dated February 1, 2018, Commission File No. 333-15387).](http://www.sec.gov/Archives/edgar/data/928576/000119312518029396/d487805dex41.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;4.15\*\* | [Eighth Supplemental Indenture, dated as of January 9, 2019, between MidAmerican Energy Company and The Bank of New York Mellon Trust Company, N.A., as trustee (Filed as Exhibit 4.1 to MidAmerican Energy Company's Current Report on Form 8-K dated January 9, 2019, Commission File No. 333-15387).](http://www.sec.gov/Archives/edgar/data/928576/000119312519005205/d678623dex41.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;4.16\*\* | [Amendment Number 1 to the Eighth Supplemental Indenture, dated as of October 15, 2019, between MidAmerican Energy Company and The Bank of New York Mellon Trust Company, N.A., as trustee (Filed as Exhibit 4.3 to MidAmerican Energy Company's Current Report on Form 8-K dated October 15, 2019, Commission File No. 333-15387).](http://www.sec.gov/Archives/edgar/data/928576/000119312519267633/d817973dex43.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;4.17\*\* | [Ninth Supplemental Indenture, dated as of October 15, 2019, between MidAmerican Energy Company and The Bank of New York Mellon Trust Company, N.A., as trustee (Filed as Exhibit 4.4 to MidAmerican Energy Company's Current Report on Form 8-K dated October 15, 2019, Commission File No. 333-15387).](http://www.sec.gov/Archives/edgar/data/928576/000119312519267633/d817973dex44.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;4.18\*\* | [Tenth Supplemental Indenture, dated as of July 22, 2021, between MidAmerican Energy Company and The Bank of New York Mellon Trust Company, N.A., as trustee (Filed as Exhibit 4.3 to MidAmerican Energy Company's Current Report on Form 8-K dated July 22, 2021, Commission File No. 333-15387).](http://www.sec.gov/Archives/edgar/data/928576/000119312521221955/d60461dex43.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;4.19\*\* | [Form of Indenture, by and between MidAmerican Energy Company and The Bank of New York, as trustee (Filed as Exhibit 4.1 to MidAmerican Energy Company's Registration Statement on Form S-3 (No. 333-59760), filed January 31, 2002).](http://www.sec.gov/Archives/edgar/data/928576/000095013602000271/file005.txt) |
| &nbsp;&nbsp;&nbsp;&nbsp;4.20\*\* | [First Supplemental Indenture, dated as of February 8, 2002, by and between MidAmerican Energy Company and The Bank of New York, Trustee (Filed as Exhibit 4.3 to MidAmerican Energy Company's Annual Report on Form 10-K for the year ended December 31, 2004, Commission File No. 333-15387).](http://www.sec.gov/Archives/edgar/data/928576/000108131605000019/exh4-3.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;4.21\*\* | [Fourth Supplemental Indenture, dated November 1, 2005, by and between MidAmerican Energy Company and The Bank of New York Trust Company, NA, Trustee (Filed as Exhibit 4.1 to MidAmerican Energy Company's Annual Report on Form 10-K for the year ended December 31, 2005, Commission File No. 333-15387).](http://www.sec.gov/Archives/edgar/data/928576/000108131606000006/exh4-1.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;4.22\*\* | [Indenture, dated as of October 1, 2006, by and between MidAmerican Energy Company and The Bank of New York Trust Company, N.A., as trustee (filed as Exhibit 4.1 to MidAmerican Energy Company's Quarterly Report on Form 10-Q for the quarter ended September 30, 2006, Commission File No. 333-15387).](http://www.sec.gov/Archives/edgar/data/928576/000108131606000036/exh4-1.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;4.23\*\* | [First Supplemental Indenture, dated as of October 6, 2006, by and between MidAmerican Energy Company and The Bank of New York Trust Company, N.A., as trustee relating to the 5.80% Notes due 2036 (Filed as Exhibit 4.2 to MidAmerican Energy Company's Quarterly Report on Form 10-Q for the quarter ended September 30, 2006, Commission File No. 333-15387).](http://www.sec.gov/Archives/edgar/data/928576/000108131606000036/exh4-2.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;5.1\*\* | [Opinion of Gibson, Dunn & Crutcher LLP.](http://www.sec.gov/Archives/edgar/data/928576/000119312521190026/d179098dex51.htm) |
| &nbsp;&nbsp;&nbsp;&nbsp;5.2\*\* | [Opinion of Jeffery B. Erb, Esq.](http://www.sec.gov/Archives/edgar/data/928576/000119312521190026/d179098dex52.htm) |
| 23.1\*\* | [Consent of Gibson, Dunn & Crutcher LLP (included in Exhibit 5.1).](http://www.sec.gov/Archives/edgar/data/928576/000119312521190026/d179098dex51.htm) |

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##### [**Table of Contents**](#toc)

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| | |
|:---|:---|
| 23.2\*\* | [Consent of Jeffery B. Erb, Esq. (included in Exhibit 5.2).](http://www.sec.gov/Archives/edgar/data/928576/000119312521190026/d179098dex52.htm) |
| 23.3 | [Consent of Deloitte & Touche LLP.](d440040dex233.htm) |
| 24.1\*\* | [Power of Attorney.](http://www.sec.gov/Archives/edgar/data/928576/000119312521190026/d179098ds3asr.htm#sig) |
| 25.1\*\* | [Statement of Eligibility on Form T-1 under the Trust Indenture Act of 1939 of The Bank of New York Mellon Trust Company, N.A. for the form of senior unsecured indenture.](http://www.sec.gov/Archives/edgar/data/928576/000119312521190026/d179098dex251.htm) |
| 25.2\*\* | [Statement of Eligibility on Form T-1 under the Trust Indenture Act of 1939 of The Bank of New York Mellon Trust Company, N.A. for the form of subordinated unsecured indenture.](http://www.sec.gov/Archives/edgar/data/928576/000119312521190026/d179098dex252.htm) |
| 25.3\*\* | [Statement of Eligibility on Form T-1 under the Trust Indenture Act of 1939 of The Bank of New York Mellon Trust Company, N.A. for the Mortgage Bond Indenture.](http://www.sec.gov/Archives/edgar/data/928576/000119312521190026/d179098dex253.htm) |
| 107 | [Filing Fee Table.](d440040dexfilingfees.htm) |

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\* To be filed as an exhibit to an amendment hereto or as an exhibit to a document to be incorporated by reference herein.

\*\* Previously filed.

***Item 17. Undertakings***

The undersigned registrant hereby undertakes:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) To include any prospectus required by Section 10(a)(3) of the Securities Act of 1933;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than 20% change in the maximum aggregate offering price set forth in the "Calculation of Registration Fee" table in the effective registration statement;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) To include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement;

*provided, however*, that paragraphs (i), (ii) and (iii) above do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 that are incorporated by reference in the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the registration statement.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) That, for the purpose of determining any liability under the Securities Act of 1933, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial *bona fide* offering thereof.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(4) That, for the purpose of determining liability under the Securities Act of 1933 to any purchaser:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) Each prospectus filed by the registrant pursuant to Rule 424(b)(3) shall be deemed to be part of the registration statement as of the date the filed prospectus was deemed part of and included in the registration

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##### [**Table of Contents**](#toc)
statement; and (ii) Each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5) or (b)(7) as part of a registration statement in reliance on Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii) or (x) for the purpose of providing the information required by Section 10(a) of the Securities Act of 1933 shall be deemed to be part of and included in the registration statement as of the earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities in the offering described in the prospectus. As provided in Rule 430B, for liability purposes of the issuer and any person that is at that date an underwriter, such date shall be deemed to be a new effective date of the registration statement relating to the securities in the registration statement to which that prospectus relates, and the offering of such securities at that time shall be deemed to be the initial *bona fide* offering thereof.

*Provided*, *however*, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such effective date, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such effective date.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(5) That, for the purpose of determining liability of the registrant under the Securities Act of 1933 to any purchaser in the initial distribution of the securities:

The undersigned registrant undertakes that in a primary offering of securities of the undersigned registrant pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) Any preliminary prospectus or prospectus of the undersigned registrant relating to the offering required to be filed pursuant to Rule 424;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) Any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrant or used or referred to by the undersigned registrant;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) The portion of any other free writing prospectus relating to the offering containing material information about the undersigned registrant or its securities provided by or on behalf of the undersigned registrant; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iv) Any other communication that is an offer in the offering made by the undersigned registrant to the purchaser.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(6) That, for purposes of determining any liability under the Securities Act of 1933, each filing of the registrant's annual report pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan's annual report pursuant to section 15(d) of the Securities Exchange Act of 1934) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(7) Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Act and will be governed by the final adjudication of such issue.

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##### [**Table of Contents**](#toc)
**SIGNATURES** 

Pursuant to the requirements of the Securities Act of 1933, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this Post-Effective Amendment No. 2 to registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Des Moines, State of Iowa, on February 27, 2023.

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| | |
|:---|:---|
| MIDAMERICAN ENERGY COMPANY | MIDAMERICAN ENERGY COMPANY |
| By: | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;/s/ Kelcey A. Brown |
| Name: | Kelcey A. Brown |
| Title: | President and Chief Executive Officer |

---

Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the dates indicated.

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| | | |
|:---|:---|:---|
| **Signature** | **Title** | **Date** |
| /s/ Kelcey A. Brown<br> Kelcey A. Brown | Director, President and Chief Executive Officer (principal executive officer) | February 27, 2023 |
| /s/ Thomas B. Specketer<br> Thomas B. Specketer | Director, Vice President and Chief Financial Officer (principal financial and accounting officer) | February 27, 2023 |

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## Exhibit 23.3

**EXHIBIT 23.3** 

**CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM** 

We consent to the incorporation by reference in this Amendment No. 2 to the Registration Statement No. 333-257069 on Form S-3 of our report dated February 24, 2023, relating to the financial statements of MidAmerican Energy Company, appearing in the Annual Report on Form 10-K of MidAmerican Energy Company for the year ended December 31, 2022. We also consent to the reference to us under the heading "Experts" in such Registration Statement.

/s/ Deloitte & Touche LLP

Des Moines, Iowa

February 27, 2023

## Ex-Filing

**Exhibit 107** 

**Calculation of Filing Fee Tables** 

**Form S-3** 

(Form Type)

**MidAmerican Energy Company** 

(Exact Name of Registrant as Specified in its Charter)

**Table 1: Newly Registered and Carry Forward Securities** 

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| | | | | | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|
|  | Security<br> Type | Security Class<br> Title | Fee<br>Calculation<br>or Carry<br>Forward<br>Rule | Amount<br>Registered | Proposed<br>Maximum<br>Offering<br>Price Per<br>Unit | Maximum<br> Aggregate<br> Offering Price | Fee<br> Rate | Amount of<br>Registration Fee | Carry<br>Forward <br>Form<br>Type | Carry<br>Forward<br>File<br>Number | Carry<br>Forward<br>Initial<br>effective<br>date | Filing Fee<br>Previously<br>Paid In<br>Connection<br>with<br>Unsold<br>Securities<br>to be<br>Carried<br>Forward |
| &nbsp;&nbsp;&nbsp;Newly Registered Securities | &nbsp;&nbsp;&nbsp;Newly Registered Securities | &nbsp;&nbsp;&nbsp;Newly Registered Securities | &nbsp;&nbsp;&nbsp;Newly Registered Securities | &nbsp;&nbsp;&nbsp;Newly Registered Securities | &nbsp;&nbsp;&nbsp;Newly Registered Securities | &nbsp;&nbsp;&nbsp;Newly Registered Securities | &nbsp;&nbsp;&nbsp;Newly Registered Securities | &nbsp;&nbsp;&nbsp;Newly Registered Securities | &nbsp;&nbsp;&nbsp;Newly Registered Securities | &nbsp;&nbsp;&nbsp;Newly Registered Securities | &nbsp;&nbsp;&nbsp;Newly Registered Securities | &nbsp;&nbsp;&nbsp;Newly Registered Securities |
|  | Debt | Unsecured Debt Securities | Rule 457(o) | (1)(2) | (2) |  |  |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp; <br> Fees to<br> Be Paid | Debt | First Mortgage Bonds | Rule 457(o) | (1)(2) | (2) |  |  |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp; <br> Fees to<br> Be Paid | Equity | Preferred Stock | Rule 457(o) | (1)(2) | (2) |  |  |  |  |  |  |  |
|  | Unallocated <br> (Universal)<br> Shelf |  | Rule 457(o) | (1)(2) | (2) | $3250000000 | 0.0001102 | $358150 |  |  |  |  |
| &nbsp;&nbsp;&nbsp; Fees<br> Previously <br> Paid | N/A | N/A | N/A | N/A | N/A | N/A |  | N/A |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Carry Forward Securities | &nbsp;&nbsp;&nbsp;Carry Forward Securities | &nbsp;&nbsp;&nbsp;Carry Forward Securities | &nbsp;&nbsp;&nbsp;Carry Forward Securities | &nbsp;&nbsp;&nbsp;Carry Forward Securities | &nbsp;&nbsp;&nbsp;Carry Forward Securities | &nbsp;&nbsp;&nbsp;Carry Forward Securities | &nbsp;&nbsp;&nbsp;Carry Forward Securities | &nbsp;&nbsp;&nbsp;Carry Forward Securities | &nbsp;&nbsp;&nbsp;Carry Forward Securities | &nbsp;&nbsp;&nbsp;Carry Forward Securities | &nbsp;&nbsp;&nbsp;Carry Forward Securities | &nbsp;&nbsp;&nbsp;Carry Forward Securities |
| &nbsp;&nbsp;&nbsp; Carry Forward<br> Securities | N/A | N/A | N/A | N/A |  | N/A |  |  | N/A | N/A | N/A | N/A |
|  | Total Offering Amounts | Total Offering Amounts | Total Offering Amounts | Total Offering Amounts |  | $3250000000 |  | $358150 |  |  |  |  |
|  | Total Fees Previously Paid | Total Fees Previously Paid | Total Fees Previously Paid | Total Fees Previously Paid |  |  |  | $358150(3) |  |  |  |  |
|  | Total Fee Offsets | Total Fee Offsets | Total Fee Offsets | Total Fee Offsets |  |  |  | N/A |  |  |  |  |
|  | Net Fee Due | Net Fee Due | Net Fee Due | Net Fee Due |  |  |  | –– |  |  |  |  |

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(1) Such indeterminate amount of securities registered hereunder, as may from time to time be issued by MidAmerican Energy Company (the "Registrant") at indeterminate prices, with an aggregate initial offering price not to exceed $3,250,000,000.

(2) The amount registered and the proposed maximum aggregate offering price will be determined from time to time by the Registrant in connection with the issuance by the securities registered hereunder and are not specified pursuant to Instruction 2.A(ii)(b) of Form S-3 under the Securities Act of 1933, as amended.

(3) Previously paid in connection with the filing of Post-Effective Amendment No. 1 to this Registration Statement on February 23, 2023.