NOTE PURCHASE AGREEMENT DATED SEPTEMBER 11, 2008

In the case of each determination under clause (i) or clause (ii), as the case may be, of the preceding paragraph, such implied yield will be determined, if necessary, by (a) converting U.S. Treasury bill quotations to bond equivalent yields in accordance with accepted financial practice and (b) interpolating linearly between (1) the applicable U.S. Treasury security with the maturity closest to and greater than such Remaining Average Life and (2) the applicable U.S. Treasury security with the maturity closest to and less than such Remaining Average Life.  The Reinvestment Yield shall be rounded to the number of decimal places as appears in the interest rate of the applicable Note.

“Remaining Average Life” means, with respect to any Called Principal, the number of years (calculated to the nearest one-twelfth year) obtained by dividing (i) such Called Principal into (ii) the sum of the products obtained by multiplying (a) the principal component of each Remaining Scheduled Payment with respect to such Called Principal by (b) the number of years (calculated to the nearest one-twelfth year) that will elapse between the Settlement Date with respect to such Called Principal and the scheduled due date of such Remaining Scheduled Payment.

“Remaining Scheduled Payments” means, with respect to the Called Principal of any Note, all payments of such Called Principal and interest thereon that would be due after the Settlement Date with respect to such Called Principal if no payment of such Called Principal were made prior to its scheduled due date, provided that if such Settlement Date is not a date on which interest payments are due to be made under the terms of the Notes, then the amount of the next succeeding scheduled interest payment will be reduced by the amount of interest accrued to such Settlement Date and required to be paid on such Settlement Date pursuant to Section 8.2 or Section 12.1.

“Settlement Date” means, with respect to the Called Principal of any Note, the date on which such Called Principal is to be prepaid pursuant to Section 8.2 or has become or is declared to be immediately due and payable pursuant to Section 12.1, as the context requires.

Section 8.7.

Change in Control.

(a)

Notice of Change in Control and Change in Control Event.  The Company will, within five (5) Business Days after a Responsible Officer has knowledge of the occurrence of any Change in Control, give written notice of such Change in Control to each holder of Notes.  If within 90 days after such Change in Control, the Company does not, for any reason, have an Investment Grade Rating, a “Change in Control Event” shall be deemed to have occurred.  If a Change in Control Event has occurred, the Company shall promptly, and, in any event, within 10 days after the end of such 90 day period, give written notice thereof to the holders of the Notes, and such notice shall contain and constitute an offer by the Company to prepay the Notes of the Company as described in Section 8.7(b) hereof and shall be accompanied by the certificate described in Section 8.7(e).

(b)

Offer to Prepay Notes.  The offer to prepay Notes contemplated by paragraph (a) of this Section 8.7 shall be an offer to prepay by the Company, in accordance with and subject to this Section 8.7, all, but not less than all, the Notes held by each holder (in this case only, “holder” in respect of any Note registered in the name of a nominee for a disclosed beneficial owner shall mean such beneficial owner) on a date specified in such offer (the “Proposed Prepayment Date”).  Such date shall be a Business Day not less than 30 days and not more than 60 days after the date of such offer.

(c)

Acceptance.  A holder of Notes may accept the offer to prepay made pursuant to this Section 8.7 by causing a notice of such acceptance to be delivered to the Company not later than 15 days prior to the Proposed Prepayment Date.  A failure by a holder of Notes to respond to an offer to prepay made pursuant to this Section 8.7 within the specified time period shall be deemed to constitute a rejection of such offer by such holder.

(d)

Prepayment.  Prepayment of the Notes to be prepaid pursuant to this Section 8.7 shall be at 100% of the principal amount of the Notes, together with accrued and unpaid interest thereon to the date of prepayment, but in no event with a Make-Whole Amount or other premium.  The prepayment shall be made on the Proposed Prepayment Date.  

(e)

Officer’s Certificate.  Each offer to prepay the Notes pursuant to this Section 8.7 shall be accompanied by a certificate, executed by a Senior Financial Officer of the Company and dated the date of such offer, specifying:  (i) the Proposed Prepayment Date; (ii) that such offer is made pursuant to this Section 8.7; (iii) the principal amount of each Note offered to be prepaid (which shall be 100% of the principal amount thereof); (iv) the interest that would be due on each Note offered to be prepaid, accrued to the Proposed Prepayment Date; (v) that the conditions of this Section 8.7 have been fulfilled; (vi) in reasonable detail, the nature of the Change in Control Event; and (vii) any written response from the relevant rating agency.

SECTION 9.

AFFIRMATIVE COVENANTS.

The Company covenants that so long as any of the Notes are outstanding:

Section 9.1.

Compliance with Law.  Without limiting Section 10.4, the Company will and will cause each of its Principal Subsidiaries to comply with all laws, ordinances or governmental rules or regulations to which each of them is subject, including, without limitation, ERISA, the USA Patriot Act and Environmental Laws, and will obtain and maintain in effect all licenses, certificates, permits, franchises and other governmental authorizations necessary to the ownership of their respective properties or to the conduct of their respective businesses, in each case to the extent necessary to ensure that non-compliance with such laws, ordinances or governmental rules or regulations or failures to obtain or maintain in effect such licenses, certificates, permits, franchises and other governmental authorizations would not reasonably be expected, individually or in the aggregate, to have a Material Adverse Effect.

Section 9.2.

Insurance.  The Company will and will cause each of its Principal Subsidiaries to maintain, with financially sound and reputable insurers, insurance with respect to their respective properties and businesses against such casualties and contingencies, of such types, on such terms and in such amounts (including deductibles, co-insurance and self-insurance, if adequate reserves are maintained with respect thereto) as is customary in the case of entities of established reputations engaged in the same or a similar business and similarly situated.

Section 9.3.

Maintenance of Properties.  The Company will and will cause each of its Principal Subsidiaries to maintain and keep, or cause to be maintained and kept, their respective properties in good repair, working order and condition (other than ordinary wear and tear), so that the business carried on in connection therewith may be properly conducted at all times, provided that this Section shall not prevent (i) the Company from discontinuing coal use at its ▇▇▇▇▇▇ Generating Station (as described in footnote 19 in Part II, Item 8 “Financial Statements and Supplementary Data” in the 2007 10-K Report and footnote 11 in Part I, Item 1 “Financial Statements” in the June 30, 2008 10-Q Report) or (ii) the Company or any Principal Subsidiary from discontinuing the operation and the maintenance of any of its properties if such discontinuance is desirable in the conduct of its business and the Company has concluded that such discontinuance would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect.

Section 9.4.

Payment of Taxes.  The Company will and will cause each of its Principal Subsidiaries to file all income tax or similar tax returns required to be filed in any jurisdiction and to pay and discharge all taxes shown to be due and payable on such returns and all other taxes, assessments, governmental charges, or levies payable by any of them, to the extent the same have become due and payable and before they have become delinquent, provided that neither the Company nor any Principal Subsidiary need pay any such tax, assessment, charge or levy if (i) the amount, applicability or validity thereof is contested by the Company or such Principal Subsidiary on a timely basis in good faith and in appropriate proceedings, and the Company or a Principal Subsidiary has established adequate reserves therefor in accordance with GAAP on the books of the Company or such Principal Subsidiary or (ii) the nonpayment of all such taxes, assessments, charges and levies in the aggregate would not reasonably be expected to have a Material Adverse Effect.

Section 9.5.

Legal Existence, Etc.  Subject to Section 10.2, the Company will at all times preserve and keep in full force and effect its legal existence.  Subject to Section 10.2, the Company will at all times preserve and keep in full force and effect the legal existence of each of its Principal Subsidiaries (unless merged into the Company or a Wholly-Owned Subsidiary) and all rights and franchises of the Company and its Principal Subsidiaries unless, in the good faith judgment of the Company, the termination of or failure to preserve and keep in full force and effect such legal existence, right or franchise would not, individually or in the aggregate, have a Material Adverse Effect.

Section 9.6.

Books and Records.  The Company will, and will cause each of its Principal Subsidiaries to, maintain proper books of record and account in conformity with GAAP and all applicable requirements of any Governmental Authority having legal or regulatory jurisdiction over the Company or such Subsidiary, as the case may be.

Section 9.7.

Conduct of Business.  The Company will, and will cause each Principal Subsidiary to, (a) carry on and conduct its business in substantially the same manner and in substantially the same fields of enterprise as it is presently conducted, (b) do all things necessary to remain duly incorporated or organized, validly existing and (to the extent such concept applies to such entity) in good standing as a domestic corporation, partnership or limited liability company in its jurisdiction of incorporation or organization, as the case may be, and (c) maintain all requisite authority to conduct its business in each jurisdiction in which its business is conducted and the failure so to maintain such authority would reasonably be expected to have a Material Adverse Effect, provided that this Section shall not be deemed to prohibit any transaction permitted under Section 10.2.

SECTION 10.

NEGATIVE COVENANTS.

The Company covenants that so long as any of the Notes are outstanding:

Section 10.1.

Transactions with Affiliates.  The Company will not, and will not permit any Principal Subsidiary to, enter into any Material transaction (including the purchase or sale of any Property or service) with, or make any payment or transfer to, any Affiliate except (i) in the ordinary course of business and pursuant to the reasonable requirements of the Company’s or such Principal Subsidiary’s business and upon fair and reasonable terms no less favorable to the Company or such Principal Subsidiary than the Company or such Principal Subsidiary would obtain in a comparable arms-length transaction, (ii) capital contributions to, or equity investments in, MGE Transco Investments LLC in connection with MGE Transco Investments LLC’s capital contributions to, or equity investments in, American Transmission Company LLC or (iii) pursuant to agreements or transactions authorized or approved by the Public Service Commission of Wisconsin or federal utilities regulatory bodies (provided that in the case of any agreement or transaction having terms that are less favorable to the Company or such Principal Subsidiary than the Company or such Principal Subsidiary would obtain in a comparable arms-length transaction, such authorization or approval acknowledges the non-arms-length nature of such terms).

Section 10.2.

Merger, Consolidation, Etc.  The Company will not consolidate with or merge with any other Person or convey, transfer or lease all or substantially all of its assets in a single transaction or series of transactions to any Person unless:

(a)

the successor formed by such consolidation or the survivor of such merger or the Person that acquires by conveyance, transfer or lease all or substantially all of the assets of the Company as an entirety, as the case may be, shall be a solvent corporation or limited liability company organized and existing under the laws of the United States or any State thereof (including the District of Columbia), and, if the Company is not such corporation or limited liability company, such corporation or limited liability company shall have executed and delivered to each holder of any Notes its assumption of the due and punctual performance and observance of each covenant and condition of this Agreement and the Notes; and

(b)

immediately before and immediately after giving effect to such transaction, no Default or Event of Default shall have occurred and be continuing.

No such conveyance, transfer or lease of substantially all of the assets of the Company shall have the effect of releasing the Company or any successor corporation or limited liability company that shall theretofore have become such in the manner prescribed in this Section 10.2 from its liability under this Agreement or the Notes.

Section 10.3.

Terrorism Sanctions Regulations.  The Company will not and will not permit any Subsidiary to (a) become a Person described or designated in the Specially Designated Nationals and Blocked Persons List of the Office of Foreign Assets Control or in Section 1 of the Anti-Terrorism Order or (b) engage in any dealings or transactions with any such Person.

Section 10.4.

Limitation on Liens.  The Company will not, nor will it permit any Principal Subsidiary to, create, incur, or suffer to exist any Lien in, of or on the property of the Company or any of its Principal Subsidiaries, except:

(a)

Liens for taxes, assessments or governmental charges or levies on its property if the same shall not at the time be delinquent or thereafter can be paid without penalty, or are being contested in good faith and by appropriate proceedings;

(b)

Liens imposed by law, such as carriers’, warehousemen’s and mechanics’ liens and other similar liens arising in the ordinary course of business which secure payment of obligations not more than 60 days past due or which are being contested in good faith and by appropriate proceedings diligently conducted;

(c)

Liens arising out of pledges or deposits under worker’s compensation laws, unemployment insurance, old age pensions, or other social security or retirement benefits, or similar legislation;

(d)

Lien incidental to the normal conduct of the business of the Company or any Principal Subsidiary or the ownership of its property or the conduct of the ordinary course of its business, including (i) zoning restrictions, easements, rights of way, reservations, restrictions on the use of real property and other minor irregularities of title, (ii) rights of lessees under leases, (iii) rights of collecting banks having rights of setoff, revocation, refund or chargeback with respect to money or instruments of the Company or any Principal Subsidiary on deposit with or in the possession of such banks, (iv) Liens or deposits to secure the performance of statutory obligations, tenders, bids, leases, progress payments, performance or return-of-money bonds, performance or other similar bonds or other obligations of a similar nature incurred in the ordinary course of business, and (v) Liens required by any contract or statute in order to permit the Company or a Principal Subsidiary to perform any contract or subcontract made by it with or pursuant to the requirements of a governmental entity, in each case which are not incurred in connection with the borrowing of money, the obtaining of advances or credit or the payment of the deferred purchase price of property and which do not in the aggregate impair the use of property in the operation of the business of the Company and its Principal Subsidiaries taken as a whole;

(e)

Liens on property existing at the time of acquisition thereof or Liens affecting property of a Person existing at the time it becomes a Principal Subsidiary or at the time it is merged into or consolidated with the Company or a Principal Subsidiary; provided that, in either case, such Liens were not granted in contemplation of such acquisition or in contemplation of the transaction pursuant to which such Person became a Principal Subsidiary; and provided further that in either case, such Liens do not extend to or cover any property of the Company or of any of its Principal Subsidiaries other than the property that secured the acquired Indebtedness prior to the time such Indebtedness became Indebtedness of the Company or a Principal Subsidiary;

(f)

Liens on property securing Indebtedness incurred prior to, at the time of, or within 12 months after the acquisition thereof for the purpose of financing all or part of the purchase price thereof, provided that such Liens do not extend to or cover any other property of the Company or any Principal Subsidiary and the Indebtedness secured thereby was incurred to pay, and does not exceed, the purchase price thereof;

(g)

Liens on any improvements to property securing Indebtedness incurred to provide funds for all or part of the cost of such improvements in a principal amount not exceeding the cost of acquisition or construction of such improvements and incurred within 12 months after completion of such improvements or construction, provided that such Liens do not extend to or cover any property of the Company or any Principal Subsidiary other than such improvements;

(h)

Liens to government entities granted to secure pollution control or industrial revenue bond financings, which Liens in each financing transaction cover only the property the acquisition of which, or the construction of which, was financed by such financing, and property related thereto;

(i)

any Lien incurred or deposits to secure the performance of surety bonds incurred in the ordinary course of business consistent with past practice, provided that such Liens shall cover only the Company’s or its Principal Subsidiary interests in and relating to the contract underlying the transaction for which such surety bonds were issued;

(j)

Liens on cash or cash equivalents created or existing to secure stay or appeal bonds or otherwise resulting from any litigation or legal proceeding which are being contested in good faith by appropriate action promptly initiated and diligently conducted, including the Lien of any judgment; provided that the aggregate amount secured by all such Liens does not exceed $25,000,000;

(k)

Liens securing any extension, renewal, replacement or refinancing of Indebtedness secured by any Lien referred to in the foregoing clauses (e), (f), (g), (h), and (m); provided that

(i)

such new Lien shall be limited to all or part of the same property that secured the original Lien (plus improvements on such property) and

(ii)

the amount secured by such Lien at such time is not increased to any amount greater than the amount outstanding at the time of such renewal, replacement or refinancing;

(l)

agreements for and obligations relating to the joint or common use of property owned by the Company or any Principal  Subsidiary in common or jointly with one or more other parties;

(m)

Liens on assets held by entities which are required to be included in the Company’s or any Principal Subsidiary’s consolidated financial statements solely as a result of the application of FASB Interpretation No. 46R;

(n)

Liens existing on the date hereof and described in Schedule 5.15 (other than Liens arising under the Mortgage, which are described and covered in paragraph (p) of this Section 10.4);

(o)

Permissible Encumbrances;

(p)

Liens arising under the Mortgage; and

(q)

Liens securing Indebtedness of the Company or any Subsidiary permitted by Section 10.6.

Section 10.5.

Indebtedness Ratio.  The Company will not permit the ratio of (i) its Consolidated Indebtedness to (ii) its Consolidated Total Capitalization to exceed 0.65 to 1.0 at any time.

Section 10.6.

Priority Debt.  The Company will not at any time permit Priority Debt to exceed an amount equal to 20% of Consolidated Assets.

SECTION 11.

EVENTS OF DEFAULT.

An “Event of Default” shall exist if any of the following conditions or events shall occur and be continuing:

(a)

the Company defaults in the payment of any principal or Make-Whole Amount, if any, on any Note when the same becomes due and payable, whether at maturity or at a date fixed for prepayment or by declaration or otherwise; or

(b)

the Company defaults in the payment of any interest on any Note for more than five Business Days after the same becomes due and payable; or

(c)

the Company defaults in the performance of or compliance with any term contained in Section 7.1(d) or Sections 10.2, 10.4, 10.5 or 10.6; or

(d)

the Company defaults in the performance of or compliance with any term contained herein (other than those referred to in Sections 11(a), (b) and (c)) and such default is not remedied within 30 days after the earlier of (i) a Responsible Officer obtaining actual knowledge of such default and (ii) the Company receiving written notice of such default from any holder of a Note (any such written notice to be identified as a “notice of default” and to refer specifically to this Section 11(d)); or

(e)

any representation or warranty made in writing by or on behalf of the Company or by any officer of the Company in this Agreement or in any writing furnished by the Company or by any officer of the Company in connection with the transactions contemplated hereby proves to have been false or incorrect in any material respect on the date as of which made; or

(f)

(i) the Company or any Principal Subsidiary is in default (as principal or as guarantor or other surety) in the payment of any principal of or premium or make-whole amount or interest on any Indebtedness that is outstanding in an aggregate principal amount of at least $25,000,000 beyond any period of grace provided with respect thereto, or (ii) the Company or any Principal Subsidiary is in default in the performance of or compliance with any term of any evidence of any Indebtedness in an aggregate outstanding principal amount of at least $25,000,000 or of any mortgage, indenture or other agreement relating thereto or any other condition exists, and as a consequence of such default or condition such Indebtedness has become, or has been declared due and payable before its stated maturity or before its regularly scheduled dates of payment; or

(g)

the Company or any Principal Subsidiary (i) is generally not paying, or admits in writing its inability to pay, its debts as they become due, (ii) files, or consents by answer or otherwise to the filing against it of, a petition for relief or reorganization or arrangement or any other petition in bankruptcy, for liquidation or to take advantage of any bankruptcy, insolvency, reorganization, moratorium or other similar law of any jurisdiction, (iii) makes an assignment for the benefit of its creditors, (iv) consents to the appointment of a custodian, receiver, trustee or other officer with similar powers with respect to it or with respect to any substantial part of its property, (v) is adjudicated as insolvent or to be liquidated, or (vi) takes corporate action for the purpose of any of the foregoing; or

(h)

a court or Governmental Authority of competent jurisdiction enters an order appointing, without consent by the Company or any of its Principal Subsidiaries, a custodian, receiver, trustee or other officer with similar powers with respect to it or with respect to any substantial part of its property, or constituting an order for relief or approving a petition for relief or reorganization or any other petition in bankruptcy or for liquidation or to take advantage of any bankruptcy or insolvency law of any jurisdiction, or ordering the dissolution, winding-up or liquidation of the Company or any of its Significant Subsidiaries, or any such petition shall be filed against the Company or any of its Significant Subsidiaries and such petition shall not be dismissed within 60 days; or

(i)

a final judgment or judgments for the payment of money aggregating in excess of $25,000,000 (that is not covered by insurance, performance bonds or the like issued by solvent companies who have acknowledged coverage) are rendered against one or more of the Company and its Principal Subsidiaries and which judgments are not, within 90 days after entry thereof, bonded, discharged or stayed pending appeal, or are not discharged within 90 days after the expiration of such stay; or

(j)

if (i) any Plan shall fail to satisfy the minimum funding standards of ERISA or the Code for any plan year or part thereof or a waiver of such standards or extension of any amortization period is sought or granted under section 412 of the Code, (ii) a notice of intent to terminate any Plan shall have been or is reasonably expected to be filed with the PBGC or the PBGC shall have instituted proceedings under ERISA section 4042 to terminate or appoint a trustee to administer any Plan or the PBGC shall have notified the Company or any ERISA Affiliate that a Plan may become a subject of any such proceedings, (iii) the aggregate “amount of unfunded benefit liabilities” (within the meaning of section 4001(a)(18) of ERISA) under all Plans subject to Title IV of ERISA, determined in accordance with Title IV of ERISA, shall exceed $100,000,000, (iv) the Company or any ERISA Affiliate shall have incurred or is reasonably expected to incur any liability pursuant to Title I or IV of ERISA or the penalty or excise tax provisions of the Code relating to employee benefit plans, (v) the Company or any ERISA Affiliate withdraws from any Multiemployer Plan, or (vi) the Company or any Subsidiary establishes or amends any employee welfare benefit plan that provides post-employment welfare benefits in a manner that would increase the liability of the Company or any Subsidiary thereunder; and any such event or events described in clauses (i) through (vi) above, either individually or together with any other such event or events, would reasonably be expected to have a Material Adverse Effect.

As used in Section 11(j), the terms “employee benefit plan” and “employee welfare benefit plan” shall have the respective meanings assigned to such terms in section 3 of ERISA.

SECTION 12.

REMEDIES ON DEFAULT, ETC.

Section 12.1.

Acceleration.  (a) If an Event of Default with respect to the Company described in Section 11(g) or (h) (other than an Event of Default described in clause (i) of Section 11(g) or described in clause (vi) of Section 11(g) by virtue of the fact that such clause encompasses clause (i) of Section 11(g)) has occurred, all the Notes then outstanding shall automatically become immediately due and payable.

(b)

If any Event of Default described in Section 11(a) or (b) has occurred and is continuing, any holder or holders of Notes at the time outstanding affected by such Event of Default may at any time, at its or their option, by notice or notices to the Company, declare all the Notes held by it or them to be immediately due and payable.

(c)

If any other Event of Default has occurred and is continuing, the Required Holders may at any time at its or their option, by notice or notices to the Company, declare all the Notes then outstanding to be immediately due and payable.

Upon any Notes becoming due and payable under this Section 12.1, whether automatically or by declaration, such Notes will forthwith mature and the entire unpaid principal amount of such Notes, plus (x) all accrued and unpaid interest thereon (including, but not limited to, interest accrued thereon at the Default Rate) and (y) the Make-Whole Amount determined in respect of such principal amount (to the full extent permitted by applicable law), shall all be immediately due and payable, in each and every case without presentment, demand, protest or further notice, all of which are hereby waived.  The Company acknowledges, and the parties hereto agree, that each holder of a Note has the right to maintain its investment in the Notes free from repayment by the Company (except as herein specifically provided for) and that the provision for payment of a Make-Whole Amount by the Company in the event that the Notes are prepaid or are accelerated as a result of an Event of Default, is intended to provide compensation for the deprivation of such right under such circumstances.

Section 12.2.

Other Remedies.  If any Default or Event of Default has occurred and is continuing, and irrespective of whether any Notes have become or have been declared immediately due and payable under Section 12.1, the holder of any Note at the time outstanding may proceed to protect and enforce the rights of such holder by an action at law, suit in equity or other appropriate proceeding, whether for the specific performance of any agreement contained herein or in any Note, or for an injunction against a violation of any of the terms hereof or thereof, or in aid of the exercise of any power granted hereby or thereby or by law or otherwise.

Section 12.3.

Rescission.  At any time after any Notes have been declared due and payable pursuant to Section 12.1(b) or (c), the Required Holders, by written notice to the Company, may rescind and annul any such declaration and its consequences if (a) the Company has paid all overdue interest on the Notes, all principal of and Make-Whole Amount, if any, on any Notes that are due and payable and are unpaid other than by reason of such declaration, and all interest on such overdue principal and Make-Whole Amount, if any, and (to the extent permitted by applicable law) any overdue interest in respect of the Notes, at the Default Rate, (b) neither the Company nor any other Person shall have paid any amounts which have become due solely by reason of such declaration, (c) all Events of Default and Defaults, other than non-payment of amounts that have become due solely by reason of such declaration, have been cured or have been waived pursuant to Section 17, and (d) no judgment or decree has been entered for the payment of any monies due pursuant hereto or to the Notes.  No rescission and annulment under this Section 12.3 will extend to or affect any subsequent Event of Default or Default or impair any right consequent thereon.

Section 12.4.

No Waivers or Election of Remedies, Expenses, Etc.  No course of dealing and no delay on the part of any holder of any Note in exercising any right, power or remedy shall operate as a waiver thereof or otherwise prejudice such holder’s rights, powers or remedies.  No right, power or remedy conferred by this Agreement or by any Note upon any holder thereof shall be exclusive of any other right, power or remedy referred to herein or therein or now or hereafter available at law, in equity, by statute or otherwise.  Without limiting the obligations of the Company under Section 15, the Company will pay to the holder of each Note on demand such further amount as shall be sufficient to cover all costs and expenses of such holder incurred in any enforcement or collection under this Section 12, including, without limitation, reasonable attorneys’ fees, expenses and disbursements.

SECTION 13.

REGISTRATION; EXCHANGE; SUBSTITUTION OF NOTES.

Section 13.1.

Registration of Notes.  The Company shall keep at its principal executive office a register for the registration and registration of transfers of Notes.  The name and address of each holder of one or more Notes, each transfer thereof and the name and address of each transferee of one or more Notes shall be registered in such register.  Prior to due presentment for registration of transfer, the Person in whose name any Note shall be registered shall be deemed and treated as the owner and holder thereof for all purposes hereof, and the Company shall not be affected by any notice or knowledge to the contrary.  The Company shall give to any holder of a Note that is an Institutional Investor promptly upon request therefor, a complete and correct copy of the names and addresses of all registered holders of Notes.

Section 13.2.

Transfer and Exchange of Notes.  Upon surrender of any Note to the Company at the address and to the attention of the designated officer (all as specified in Section 18(iii)), for registration of transfer or exchange (and in the case of a surrender for registration of transfer accompanied by a written instrument of transfer duly executed by the registered holder of such Note or such holder’s attorney duly authorized in writing and accompanied by the relevant name, address and other information for notices of each transferee of such Note or part thereof), within ten Business Days thereafter, the Company shall execute and deliver, at the Company’s expense (except as provided below), one or more new Notes (as requested by the holder thereof) in exchange therefor, in an aggregate principal amount equal to the unpaid principal amount of the surrendered Note.  Each such new Note shall be payable to such Person as such holder may request and shall be substantially in the form of Exhibit 1.  Each such new Note shall be dated and bear interest from the date to which interest shall have been paid on the surrendered Note or dated the date of the surrendered Note if no interest shall have been paid thereon.  The Company may require payment of a sum sufficient to cover any stamp tax or governmental charge imposed in respect of any such transfer of Notes.  Notes shall not be transferred in denominations of less than $250,000, provided that if necessary to enable the registration of transfer by a holder of its entire holding of Notes, one Note may be in a denomination of less than $250,000.  Any transferee, by its acceptance of a Note registered in its name (or the name of its nominee), shall be deemed to have made the representations set forth in Sections 6.1 and 6.2.

Section 13.3.

Replacement of Notes.  Upon receipt by the Company at the address and to the attention of the designated officer (all as specified in Section 18(iii)) of evidence reasonably satisfactory to it of the ownership of and the loss, theft, destruction or mutilation of any Note (which evidence shall be, in the case of an Institutional Investor, notice from such Institutional Investor of such ownership and such loss, theft, destruction or mutilation), and

(a)

in the case of loss, theft or destruction, of indemnity reasonably satisfactory to it (provided that if the holder of such Note is, or is a nominee for, an original Purchaser or another holder of a Note with a minimum net worth of at least $25,000,000 or a Qualified Institutional Buyer, such Person’s own unsecured agreement of indemnity shall be deemed to be satisfactory), or

(b)

in the case of mutilation, upon surrender and cancellation thereof,

within ten Business Days thereafter, the Company at its own expense shall execute and deliver, in lieu thereof, a new Note, dated and bearing interest from the date to which interest shall have been paid on such lost, stolen, destroyed or mutilated Note or dated the date of such lost, stolen, destroyed or mutilated Note if no interest shall have been paid thereon.

SECTION 14.

PAYMENTS ON NOTES.

Section 14.1.

Place of Payment.  Subject to Section 14.2, payments of principal, Make-Whole Amount, if any, and interest becoming due and payable on the Notes shall be made in New York, New York at the principal office of JPMorgan Chase Bank, N.A. in such jurisdiction.  The Company may at any time, by notice to each holder of a Note, change the place of payment of the Notes so long as such place of payment shall be either the principal office of the Company in such jurisdiction or the principal office of a bank or trust company in such jurisdiction.

Section 14.2.

Home Office Payment.  So long as any Purchaser or its nominee shall be the holder of any Note, and notwithstanding anything contained in Section 14.1 or in such Note to the contrary, the Company will pay all sums becoming due on such Note for principal, Make-Whole Amount, if any, and interest by the method and at the address specified for such purpose below such Purchaser’s name in Schedule A, or by such other method or at such other address as such Purchaser shall have from time to time specified to the Company in writing for such purpose, without the presentation or surrender of such Note or the making of any notation thereon, except that upon written request of the Company made concurrently with or reasonably promptly after payment or prepayment in full of any Note, such Purchaser shall surrender such Note for cancellation, reasonably promptly after any such request, to the Company at its principal executive office or at the place of payment most recently designated by the Company pursuant to Section 14.1.  Prior to any sale or other disposition of any Note held by a Purchaser or its nominee, such Purchaser will, at its election, either endorse thereon the amount of principal paid thereon and the last date to which interest has been paid thereon or surrender such Note to the Company in exchange for a new Note or Notes pursuant to Section 13.2.  The Company will afford the benefits of this Section 14.2 to any Institutional Investor that is the direct or indirect transferee of any Note purchased by a Purchaser under this Agreement and that has made the same agreement relating to such Note as the Purchasers have made in this Section 14.2.

SECTION 15.

EXPENSES, ETC.

Section 15.1.

Transaction Expenses.  Whether or not the transactions contemplated hereby are consummated, the Company will pay all reasonable costs and expenses (including reasonable attorneys’ fees of a special counsel and, if reasonably required by the Required Holders, local or other counsel) incurred by the Purchasers and each other holder of a Note in connection with such transactions and in connection with any amendments, waivers or consents under or in respect of this Agreement or the Notes (whether or not such amendment, waiver or consent becomes effective), including, without limitation: (a) the reasonable costs and expenses incurred in enforcing or defending (or determining whether or how to enforce or defend) any rights under this Agreement or the Notes or in responding to any subpoena or other legal process or informal investigative demand issued in connection with this Agreement or the Notes, or by reason of being a holder of any Note, (b) the reasonable costs and expenses, including financial advisors’ fees, incurred in connection with the insolvency or bankruptcy of the Company or any Subsidiary or in connection with any work-out or restructuring of the transactions contemplated hereby and by the Notes and (c) the costs and expenses incurred in connection with the initial filing of this Agreement and all related documents and financial information with the SVO, provided that such costs and expenses under this clause (c) shall not exceed $3,000.  The Company will pay, and will save each Purchaser and each other holder of a Note harmless from, all claims in respect of any fees, costs or expenses if any, of brokers and finders (other than those, if any, retained by a Purchaser or other holder in connection with its purchase of the Notes).

Section 15.2.

Survival.  The obligations of the Company under this Section 15 will survive the payment or transfer of any Note, the enforcement, amendment or waiver of any provision of this Agreement or the Notes, and the termination of this Agreement.

SECTION 16.

SURVIVAL OF REPRESENTATIONS AND WARRANTIES; ENTIRE AGREEMENT.

All representations and warranties contained herein shall survive the execution and delivery of this Agreement and the Notes, the purchase or transfer by any Purchaser of any Note or portion thereof or interest therein and the payment of any Note, and may be relied upon by any subsequent holder of a Note, regardless of any investigation made at any time by or on behalf of such Purchaser or any other holder of a Note.  All statements contained in any certificate or other instrument delivered by or on behalf of the Company pursuant to this Agreement shall be deemed representations and warranties of the Company under this Agreement.  Subject to the preceding sentence, this Agreement and the Notes embody the entire agreement and understanding between each Purchaser and the Company and supersede all prior agreements and understandings relating to the subject matter hereof.

SECTION 17.

AMENDMENT AND WAIVER.

Section 17.1.

Requirements.  This Agreement and the Notes may be amended, and the observance of any term hereof or of the Notes may be waived (either retroactively or prospectively), with (and only with) the written consent of the Company and the Required Holders, except that (a) no amendment or waiver of any of the provisions of Section 1, 2, 3, 4, 5, 6 or 21 hereof, or any defined term (as it is used therein), will be effective as to any Purchaser unless consented to by such Purchaser in writing, and (b) no such amendment or waiver may, without the written consent of the holder of each Note at the time outstanding affected thereby, (i) subject to the provisions of Section 12 relating to acceleration or rescission, change the amount or time of any prepayment or payment of principal of, or reduce the rate or change the time of payment or method of computation of interest or of the Make-Whole Amount on, the Notes, (ii) change the percentage of the principal amount of the Notes the holders of which are required to consent to any such amendment or waiver, or (iii) amend any of Sections 8, 11(a), 11(b), 12, 17 or 20.

Section 17.2.

Solicitation of Holders of Notes.

(a)

Solicitation.  The Company will provide each holder of the Notes (irrespective of the amount of Notes then owned by it) with sufficient information, sufficiently far in advance of the date a decision is required, to enable such holder to make an informed and considered decision with respect to any proposed amendment, waiver or consent in respect of any of the provisions hereof or of the Notes.  The Company will deliver executed or true and correct copies of each amendment, waiver or consent effected pursuant to the provisions of this Section 17 to each holder of outstanding Notes promptly following the date on which it is executed and delivered by, or receives the consent or approval of, the requisite holders of Notes.

(b)

Payment.  The Company will not directly or indirectly pay or cause to be paid any remuneration, whether by way of supplemental or additional interest, fee or otherwise, or grant any security or provide other credit support, to any holder of Notes as consideration for or as an inducement to the entering into by any holder of Notes or any waiver or amendment of any of the terms and provisions hereof unless such remuneration is concurrently paid, or security is concurrently granted or other credit support concurrently provided, on the same terms, ratably to each holder of Notes then outstanding even if such holder did not consent to such waiver or amendment.

(c)

Consent in Contemplation of Transfer.  Any consent made pursuant to this Section 17.2 by the holder of any Note that has transferred or has agreed to transfer such Note to the Company, any Subsidiary or any Affiliate of the Company and has provided or has agreed to provide such written consent as a condition to such transfer shall be void and of no force or effect except solely as to such holder, and any amendments effected or waivers granted or to be effected or granted that would not have been or would not be so effected or granted but for such consent (and the consents of all other holders of Notes that were acquired under the same or similar conditions) shall be void and of no force or effect except solely as to such transferring holder.

Section 17.3.

Binding Effect, Etc.  Any amendment or waiver consented to as provided in this Section 17 applies equally to all holders of Notes and is binding upon them and upon each future holder of any Note and upon the Company without regard to whether such Note has been marked to indicate such amendment or waiver.  No such amendment or waiver will extend to or affect any obligation, covenant, agreement, Default or Event of Default not expressly amended or waived or impair any right consequent thereon.  No course of dealing between the Company and the holder of any Note nor any delay in exercising any rights hereunder or under any Note shall operate as a waiver of any rights of any holder of such Note.  As used herein, the term “this Agreement” and references thereto shall mean this Agreement as it may from time to time be amended or supplemented.

Section 17.4.

Notes Held by Company, Etc.  Solely for the purpose of determining whether the holders of the requisite percentage of the aggregate principal amount of Notes then outstanding approved or consented to any amendment, waiver or consent to be given under this Agreement or the Notes, or have directed the taking of any action provided herein or in the Notes to be taken upon the direction of the holders of a specified percentage of the aggregate principal amount of Notes then outstanding, Notes directly or indirectly owned by the Company or any of its Affiliates shall be deemed not to be outstanding.

SECTION 18.

NOTICES.

All notices and communications provided for hereunder shall be in writing and sent (a) by telecopy if the sender on the same day sends a confirming copy of such notice by a recognized overnight delivery service (charges prepaid), or (b) by registered or certified mail with return receipt requested (postage prepaid), or (c) by a recognized overnight delivery service (with charges prepaid).  Any such notice must be sent:

(i)

if to any Purchaser or its nominee, to such Purchaser or nominee at the address specified for such communications in Schedule A, or at such other address as such Purchaser or nominee shall have specified to the Company in writing,

(ii)

if to any other holder of any Note, to such holder at such address as such other holder shall have specified to the Company in writing, or

(iii)

if to the Company, to the Company at its address set forth at the beginning hereof to the attention of Vice President and Treasurer or at such other address as the Company shall have specified to the holder of each Note in writing.

Notices under this Section 18 will be deemed given only when actually received.

SECTION 19.

REPRODUCTION OF DOCUMENTS.

This Agreement and all documents relating thereto, including, without limitation, (a) consents, waivers and modifications that may hereafter be executed, (b) documents received by any Purchaser at the Closing (except the Notes themselves), and (c) financial statements, certificates and other information previously or hereafter furnished to any Purchaser, may be reproduced by such Purchaser by any photographic, photostatic, electronic, digital, or other similar process and such Purchaser may destroy any original document so reproduced.  The Company agrees and stipulates that, to the extent permitted by applicable law, any such reproduction shall be admissible in evidence as the original itself in any judicial or administrative proceeding (whether or not the original is in existence and whether or not such reproduction was made by such Purchaser in the regular course of business) and any enlargement, facsimile or further reproduction of such reproduction shall likewise be admissible in evidence.  This Section 19 shall not prohibit the Company or any other holder of Notes from contesting any such reproduction to the same extent that it could contest the original, or from introducing evidence to demonstrate the inaccuracy of any such reproduction.

SECTION 20.

CONFIDENTIAL INFORMATION.

For the purposes of this Section 20, “Confidential Information” means information delivered to any Purchaser by or on behalf of the Company or any Subsidiary in connection with the transactions contemplated by or otherwise pursuant to this Agreement that is proprietary or confidential in nature and that was clearly marked or labeled or otherwise adequately identified when received by such Purchaser as being confidential information of the Company or such Subsidiary, provided that such term does not include information that (a) was publicly known or otherwise known to such Purchaser prior to the time of such disclosure, (b) subsequently becomes publicly known through no act or omission by such Purchaser, any person acting on such Purchaser’s behalf, (c) otherwise becomes known to such Purchaser other than through disclosure by the Company or any Subsidiary without violation of any known confidentiality obligation owed to the Company or (d) constitutes financial statements delivered to such Purchaser under Section 7.1 that are otherwise publicly available.  Each Purchaser will maintain the confidentiality of such Confidential Information in accordance with procedures adopted by such Purchaser in good faith to protect confidential information of third parties delivered to such Purchaser, provided that such Purchaser may deliver or disclose Confidential Information to (i) its directors, trustees, officers, employees, agents, attorneys and affiliates (to the extent such disclosure reasonably relates to the administration of the investment represented by its Notes), (ii) its financial advisors and other professional advisors who agree to hold confidential the Confidential Information substantially in accordance with the terms of this Section 20, (iii) any other holder of any Note, (iv) any Institutional Investor to which it sells or offers to sell such Note or any part thereof or any participation therein (if such Person has agreed in writing prior to its receipt of such Confidential Information to be bound by the provisions of this Section 20), (v) any Person from which it offers to purchase any security of the Company (if such Person has agreed in writing prior to its receipt of such Confidential Information to be bound by the provisions of this Section 20), (vi) any federal or state regulatory authority having jurisdiction over such Purchaser, (vii) the NAIC or the SVO or, in each case, any similar organization, or any nationally recognized rating agency that requires access to information about such Purchaser’s investment portfolio, or (viii) any other Person to which such delivery or disclosure may be necessary or appropriate (w) to effect compliance with any law, rule, regulation or order applicable to such Purchaser, (x) in response to any subpoena or other legal process, (y) in connection with any litigation to which such Purchaser is a party or (z) if an Event of Default has occurred and is continuing, to the extent such Purchaser may reasonably determine such delivery and disclosure to be necessary or appropriate in the enforcement or for the protection of the rights and remedies under such Purchaser’s Notes and this Agreement.  Each holder of a Note, by its acceptance of a Note, will be deemed to have agreed to be bound by and to be entitled to the benefits of this Section 20 as though it were a party to this Agreement.  On reasonable request by the Company in connection with the delivery to any holder of a Note of information required to be delivered to such holder under this Agreement or requested by such holder (other than a holder that is a party to this Agreement or its nominee), such holder will enter into an agreement with the Company embodying the provisions of this Section 20.

SECTION 21.

SUBSTITUTION OF PURCHASER.

Each Purchaser shall have the right to substitute any one of its Affiliates as the purchaser of the Notes that it has agreed to purchase hereunder, by written notice to the Company, which notice shall be signed by both such Purchaser and such Affiliate, shall contain such Affiliate’s agreement to be bound by this Agreement and shall contain a confirmation by such Affiliate of the accuracy with respect to it of the representations set forth in Section 6.  Upon receipt of such notice, any reference to such Purchaser in this Agreement (other than in this Section 21), shall be deemed to refer to such Affiliate in lieu of such original Purchaser.  In the event that such Affiliate is so substituted as a Purchaser hereunder and such Affiliate thereafter transfers to such original Purchaser all of the Notes then held by such Affiliate, upon receipt by the Company of notice of such transfer, any reference to such Affiliate as a “Purchaser” in this Agreement (other than in this Section 21), shall no longer be deemed to refer to such Affiliate, but shall refer to such original Purchaser, and such original Purchaser shall again have all the rights of an original holder of the Notes under this Agreement.

SECTION 22.

MISCELLANEOUS.

Section 22.1.

Successors and Assigns.  All covenants and other agreements contained in this Agreement by or on behalf of any of the parties hereto bind and inure to the benefit of their respective successors and assigns (including, without limitation, any subsequent holder of a Note) whether so expressed or not.

Section 22.2.

Payments Due on Non-Business Days.  Anything in this Agreement or the Notes to the contrary notwithstanding (but without limiting the requirement in Section 8.2 that the notice of any optional prepayment specify a Business Day as the date fixed for such prepayment), any payment of principal of or Make-Whole Amount or interest on any Note that is due on a date other than a Business Day shall be made on the next succeeding Business Day without including the additional days elapsed in the computation of the interest payable on such next succeeding Business Day; provided that if the maturity date of any Note is a date other than a Business Day, the payment otherwise due on such maturity date shall be made on the next succeeding Business Day and shall include the additional days elapsed in the computation of interest payable on such next succeeding Business Day.

Section 22.3.

Accounting Terms.  (a)  As used in this Agreement, “GAAP” means generally accepted accounting principles in the United States, applied on a basis consistent with the principles used in preparing the Company’s audited consolidated financial statements as of December 31, 2007 and for the fiscal year then ended, as such principles may be revised as a result of changes in GAAP implemented by the Company subsequent to such date.  In this Agreement, except to the extent, if any, otherwise provided herein, all accounting and financial terms shall have the meanings ascribed to such terms by GAAP, and all computations and determinations as to accounting and financial matters shall be made in accordance with GAAP.  In the event that the financial statements generally prepared by the Company apply accounting principles other than GAAP (including as a result of any event described in Section 22.3(b)), the compliance certificate delivered pursuant to Section 7.2 accompanying such financial statements shall include information in reasonable detail reconciling such financial statements to GAAP to the extent relevant to the calculations set forth in such compliance certificate.

(b) If at any time any change in GAAP would affect the computation of any financial ratio or requirement set forth herein and the Company or the Required Holders shall so request, the Required Holders and the Company shall negotiate in good faith to amend such ratio or requirement to preserve the original intent thereof in light of such change in GAAP (subject to the approval of the Required Holders); provided that, until so amended, such ratio or requirement shall continue to be computed in accordance with GAAP prior to such change therein.

(c)  For purposes of any calculation or determination which is to be made on a consolidated basis (including compliance with Section 10.5), such calculation or determination shall exclude any assets, liabilities, revenues and expenses that are included in the Company’s financial statements from “variable interest entities” as a result of the application of FASB Interpretation No. 46, Consolidation of Variable Interest Entities – an Interpretation of ARB No. 51, as updated through FIN No. 46-R and as modified by FIN No. 94.

Section 22.4.

Severability.  Any provision of this Agreement that is prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of such prohibition or unenforceability without invalidating the remaining provisions hereof, and any such prohibition or unenforceability in any jurisdiction shall (to the full extent permitted by law) not invalidate or render unenforceable such provision in any other jurisdiction.

Section 22.5.

Construction, Etc.  Each covenant contained herein shall be construed (absent express provision to the contrary) as being independent of each other covenant contained herein, so that compliance with any one covenant shall not (absent such an express contrary provision) be deemed to excuse compliance with any other covenant.  Where any provision herein refers to action to be taken by any Person, or which such Person is prohibited from taking, such provision shall be applicable whether such action is taken directly or indirectly by such Person.

For the avoidance of doubt, all Schedules and Exhibits attached to this Agreement shall be deemed to be a part hereof.

Section 22.6.

Counterparts.  This Agreement may be executed in any number of counterparts, each of which shall be an original but all of which together shall constitute one instrument.  Each counterpart may consist of a number of copies hereof, each signed by less than all, but together signed by all, of the parties hereto.

Section 22.7.

Governing Law.  This Agreement shall be construed and enforced in accordance with, and the rights of the parties shall be governed by, the law of the State of New York excluding choice-of-law principles of the law of such State that would permit the application of the laws of a jurisdiction other than such State.

Section 22.8.

Jurisdiction and Process; Waiver of Jury Trial.  (a) The Company irrevocably submits to the non-exclusive jurisdiction of any New York State or federal court sitting in the Borough of Manhattan, The City of New York, over any suit, action or proceeding arising out of or relating to this Agreement or the Notes.  To the fullest extent permitted by applicable law, the Company irrevocably waives and agrees not to assert, by way of motion, as a defense or otherwise, any claim that it is not subject to the jurisdiction of any such court, any objection that it may now or hereafter have to the laying of the venue of any such suit, action or proceeding brought in any such court and any claim that any such suit, action or proceeding brought in any such court has been brought in an inconvenient forum.

(b)

The Company consents to process being served by or on behalf of any holder of Notes in any suit, action or proceeding of the nature referred to in Section 22.8(a) by mailing a copy thereof by registered or certified mail (or any substantially similar form of mail), postage prepaid, return receipt requested, to it at its address specified in Section 18 or at such other address of which such holder shall then have been notified pursuant to said Section.  The Company agrees that such service upon receipt (i) shall be deemed in every respect effective service of process upon it in any such suit, action or proceeding and (ii) shall, to the fullest extent permitted by applicable law, be taken and held to be valid personal service upon and personal delivery to it.  Notices hereunder shall be conclusively presumed received as evidenced by a delivery receipt furnished by the United States Postal Service or any reputable commercial delivery service.

(c)

Nothing in this Section 22.8 shall affect the right of any holder of a Note to serve process in any manner permitted by law, or limit any right that the holders of any of the Notes may have to bring proceedings against the Company in the courts of any appropriate jurisdiction or to enforce in any lawful manner a judgment obtained in one jurisdiction in any other jurisdiction.

(d)

THE PARTIES HERETO HEREBY WAIVE TRIAL BY JURY IN ANY ACTION BROUGHT ON OR WITH RESPECT TO THIS AGREEMENT, THE NOTES OR ANY OTHER DOCUMENT EXECUTED IN CONNECTION HEREWITH OR THEREWITH.

*    *    *    *    *

If you are in agreement with the foregoing, please sign the form of agreement on a counterpart of this Agreement and return it to the Company, whereupon this Agreement shall become a binding agreement between you and the Company.

Very truly yours,

MADISON GAS AND ELECTRIC COMPANY

By

 /s/ ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇

Vice President and Treasurer

This Agreement is hereby accepted and agreed to as of the date thereof.

THE PRUDENTIAL INSURANCE COMPANY OF AMERICA

By

 /s/ ▇▇▇ ▇. ▇▇▇▇

Name: ▇▇▇ ▇. ▇▇▇▇

Title:   Vice President  

This Agreement is hereby accepted and agreed to as of the date thereof.

ZURICH AMERICAN INSURANCE COMPANY

By:

Prudential Private Placement Investors, L.P. (as Investment Advisor)

By:

Prudential Private Placement Investors, Inc. (as its General Partner)

By /s/ ▇▇▇ ▇. ▇▇▇▇

Name:  ▇▇▇ ▇. ▇▇▇▇

Title:    Vice President

INFORMATION RELATING TO PURCHASERS

Payments

(1)

All payments on account of Notes held by such purchaser shall be made by wire transfer

of immediately available funds for credit to:

Account Name:  Prudential Managed Portfolio

Account No.: P86188 (please do not include spaces) (in the case of payments on account of the Note originally issued in the principal amount of $26,350,000)

Account Name:  The Prudential - Privest Portfolio

Account No.: P86189 (please do not include spaces) (in the case of payments on account of the Note originally issued in the principal amount of $10,000,000)

JPMorgan Chase Bank

New York, New York

ABA No.:  ▇▇▇-▇▇▇-▇▇▇

Each such wire transfer shall set forth the name of the Company, a reference to “5.59% Senior Notes due September 11, 2018, Security No. INV11082, PPN 557497 E*1” and the due date and application (as among principal, interest and Make-Whole Amount) of the payment being made.

(2)

Address for all notices relating to payments:

The Prudential Insurance Company of America

c/o Investment Operations Group

Gateway Center Two, 10th Floor

▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇

Newark, NJ  07102-4077

Attention:  Manager, Billings and Collections

(3)

All other notices and communications to be addressed as first provided above:

(4)

Recipient of telephonic prepayment notices:

Manager, Trade Management Group

Telephone:  (▇▇▇) ▇▇▇-▇▇▇▇

Facsimile:  (▇▇▇) ▇▇▇-▇▇▇▇

Name of Nominee in which Notes are to be issued:  None

Taxpayer I.D. Number:  ▇▇-▇▇▇▇▇▇▇

Address for Delivery of Notes:

Prudential Capital Group

▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇▇▇

Dallas, TX  75201

Attn:  ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇

Telephone:  (▇▇▇) ▇▇▇-▇▇▇▇

Payments

(1)

All payments on account of Notes held by such purchaser shall be made by wire transfer

of immediately available funds for credit to:

Hare & Co.

c/o The Bank of New York

ABA No.:  ▇▇▇-▇▇▇-▇▇▇

BNF:  IOC 566

Attn:  ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇

Ref:  ▇▇▇▇ Private Placements #399141

Each such wire transfer shall set forth the name of the Company, a reference to “5.59% Senior Notes due September 11, 2018, PPN 557497 E*1” and the due date and application (as among principal, interest and Make-Whole Amount) of the payment being made.

(2)

Address for all notices relating to payments:

Zurich North America

Attn:  Treasury T1-19

▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇

Schaumburg, IL  ▇▇▇▇▇-▇▇▇▇

Contact:  ▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇, Vice President-Treasurer

Telephone:  (▇▇▇) ▇▇▇-▇▇▇▇

Facsimile:  (▇▇▇) ▇▇▇-▇▇▇▇

Email:  ▇▇▇▇.▇▇▇▇▇▇▇▇@▇▇▇▇▇▇▇▇.▇▇▇

(3)

All other notices and communications to be addressed as first provided above:

Name of Nominee in which Notes are to be issued:  Hare & Co.

Taxpayer I.D. Number:  ▇▇-▇▇▇▇▇▇▇

Address for Delivery of Notes:

Bank of New York

Window A

▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇, 3rd Floor

New York, NY  10286

(Ref:  Zurich American Insurance Co.-Private Placements, Account Number:  399141)

with a copy to:

Prudential Capital Group

Gateway Center 4

▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇▇ Floor

Newark, NJ  07102

Attn:  Trade Management, Manager

Telephone:  (▇▇▇) ▇▇▇-▇▇▇▇

DEFINED TERMS

As used herein, the following terms have the respective meanings set forth below or set forth in the Section hereof following such term:

“Affiliate” means, at any time, and with respect to any Person, any other Person that at such time directly or indirectly through one or more intermediaries Controls, or is Controlled by, or is under common Control with, such first Person.  As used in this definition, “Control” means the possession, directly or indirectly, of the power to direct or cause the direction of the management and policies of a Person, whether through the ownership of voting securities, by contract or otherwise. Unless the context otherwise clearly requires, any reference to an “Affiliate” is a reference to an Affiliate of the Company.

“Anti-Terrorism Order” means Executive Order No. 13224 of September 24, 2001, Blocking Property and Prohibiting Transactions with Persons Who Commit, Threaten to Commit or Support Terrorism, 66 U.S. Fed. Reg. 49, 079 (2001), as amended.

“Business Day” means (a) for the purposes of Section 8.6 only, any day other than a Saturday, a Sunday or a day on which commercial banks in New York City are required or authorized to be closed, and (b) for the purposes of any other provision of this Agreement, any day other than a Saturday, a Sunday or a day on which commercial banks in New York, New York, or Madison, Wisconsin are required or authorized to be closed.

“Capital Lease” means, at any time, a lease with respect to which the lessee is required concurrently to recognize the acquisition of an asset and the incurrence of a liability in accordance with GAAP.

“Change in Control” means the acquisition by any Person, or two or more Persons acting in concert, of beneficial ownership (within the meaning of Rule 13d-3 of the Exchange Act of 1934) of 30% or more of the outstanding shares of voting stock of MGE Energy, Inc.

“Closing” is defined in Section 3.

“Code” means the Internal Revenue Code of 1986, as amended from time to time, and the rules and regulations promulgated thereunder from time to time.

“Company” means Madison Gas and Electric Company, a Wisconsin corporation or any successor that becomes such in the manner prescribed in Section 10.2.

“Confidential Information” is defined in Section 20.

“Consolidated Assets” means at any time all assets of the Company and its Subsidiaries calculated on a consolidated basis as of such time.

“Consolidated Indebtedness” means at any time the Indebtedness of the Company and its Subsidiaries calculated on a consolidated basis as of such time.

“Consolidated Net Worth” means at any time the consolidated stockholder’s equity of the Company and its Subsidiaries calculated on a consolidated basis as of such time.

“Consolidated Total Capitalization” means at any time the sum of Consolidated Indebtedness and Consolidated Net Worth, each calculated at such time.

“Default” means an event or condition the occurrence or existence of which would, with the lapse of time or the giving of notice or both, become an Event of Default.

“Default Rate” means that rate of interest that is the greater of (i) 2.00% per annum above the rate of interest stated in clause (a) of the first paragraph of the Notes or (ii) 2.00% over the rate of interest publicly announced by JPMorgan Chase Bank, N.A. in New York, New York as its “base” or “prime” rate.

“Disclosure Documents” is defined in Section 5.3.

“Electronic Delivery” is defined in Section 7.1(a).

“Environmental Laws” means any and all Federal, state, local, and foreign statutes, laws, regulations, ordinances, rules, judgments, orders, decrees, permits, concessions, grants, franchises, licenses, agreements or governmental restrictions relating to pollution and the protection of the environment or the release of any materials into the environment, including but not limited to those related to Hazardous Materials.

“ERISA” means the Employee Retirement Income  Security Act of 1974, as amended from time to time, and the rules and regulations promulgated thereunder from time to time in effect.

“ERISA Affiliate” means any trade or business  (whether or not incorporated) that is treated as a single employer together with the Company under section 414 of the Code.

“Event of Default” is defined in Section 11.

“Exchange Act” means the Securities Exchange Act of 1934, as amended.

“Form 10-K” is defined in Section 7.1(b).

“Form 10-Q” is defined in Section 7.1(a).

“GAAP”  means generally accepted accounting principles as in effect from time to time in the United States of America.

“Governmental Authority” means

(a)

the government of

(i)

the United States of America or any State or other political subdivision thereof, or

(ii)

any other jurisdiction in which the Company or any Subsidiary conducts all or any part of its business, or which asserts jurisdiction over any properties of the Company or any Subsidiary, or

(b)

any entity exercising executive, legislative, judicial, regulatory or administrative functions of, or pertaining to, any such government.

“Guaranty”  means, with respect to any Person, any obligation (except the endorsement in the ordinary course of business of negotiable instruments for deposit or collection) of such Person guaranteeing or in effect guaranteeing any indebtedness, dividend or other obligation of any other Person in any manner, whether directly or indirectly, including (without limitation) obligations incurred through an agreement, contingent or otherwise, by such Person:

(a)

to purchase such indebtedness or obligation or any property constituting security therefor;

(b)

to advance or supply funds (i) for the purchase or payment of such indebtedness or obligation, or (ii) to maintain any working capital or other balance sheet condition or any income statement condition of any other Person or otherwise to advance or make available funds for the purchase or payment of such indebtedness or obligation;

(c)

to lease properties or to purchase properties or services primarily for the purpose of assuring the owner of such indebtedness or obligation of the ability of any other Person to make payment of the indebtedness or obligation; or

(d)

otherwise to assure the owner of such indebtedness or obligation against loss in respect thereof.

In any computation of the indebtedness or other liabilities of the obligor under any Guaranty, the indebtedness or other obligations that are the subject of such Guaranty shall be assumed to be direct obligations of such obligor.

“Hazardous Material” means any and all pollutants, toxic or hazardous wastes or other substances that might pose a hazard to health and safety, the removal of which is required or the generation, manufacture, refining, production, processing, treatment, storage, handling, transportation, transfer, use, disposal, release, discharge, spillage, seepage or filtration of which is or shall be restricted, prohibited or penalized by any applicable law including, but not limited to, asbestos, urea formaldehyde foam insulation, polychlorinated biphenyls, petroleum, petroleum products, lead based paint, radon gas or similar restricted, prohibited or penalized substances.

“holder” means, with respect to any Note, the Person in whose name such Note is registered in the register maintained by the Company pursuant to Section 13.1.

“Indebtedness” with respect to any Person means, at any time, without duplication,

(a)

its liabilities for borrowed money and its redemption obligations in respect of mandatorily redeemable Preferred Stock;

(b)

its liabilities for the deferred purchase price of property acquired by such Person (excluding accounts payable arising in the ordinary course of business but including all liabilities created or arising under any conditional sale or other title retention agreement with respect to any such property);

(c)

all liabilities appearing on its balance sheet in accordance with GAAP in respect of Capital Leases;

(d)

all liabilities for borrowed money secured by any Lien with respect to any property owned by such Person (whether or not it has assumed or otherwise become liable for such liabilities);

(e)

all its liabilities in respect of letters of credit or instruments serving a similar function issued or accepted for its account by banks and other financial institutions (whether or not representing obligations for borrowed money); and

(f)

any Guaranty of such Person with respect to liabilities of a type described in any of clauses (a) through (e) hereof.

“Institutional Investor” means (a) any Purchaser of a Note, (b) any holder of a Note holding (together with one or more of its affiliates) more than 10% of the aggregate principal amount of the Notes then outstanding, (c) any bank, trust company, savings and loan association or other financial institution, any pension plan, any investment company, any insurance company, any broker or dealer, or any other similar financial institution or entity, regardless of legal form, and (d) any Related Fund of any holder of any Note.

“Investment Grade Rating” in respect of any Person means, at the time of determination, at least two of the following ratings of its senior, unsecured, non-credit enhanced, long-term indebtedness for borrowed money: (i) by Standard & Poor's Rating Services, a division of The ▇▇▇▇▇▇-▇▇▇▇ Companies, or any successor thereof, “BBB-” or better, (ii) by ▇▇▇▇▇'▇ Investors Service, Inc., or any successor thereof, “Baa3” or better, or (iii) by any other nationally recognized statistical rating agency, an equivalent or better rating.

 “Lien” means, with respect to any Person, any mortgage, lien, pledge, charge, security interest or other encumbrance, or any interest or title of any vendor, lessor, lender or other secured party to or of such Person under any conditional sale or other title retention agreement or Capital Lease, upon or with respect to any property or asset of such Person (including in the case of stock, stockholder agreements, voting trust agreements and all similar arrangements).

“Make-Whole Amount” is defined in Section 8.6.

“Material” means material in relation to the business, operations, affairs, financial condition, assets or properties of the Company and its Subsidiaries taken as a whole.

“Material Adverse Effect” means a material adverse effect on (a) the business, operations, affairs, financial condition, assets or properties of the Company and its Subsidiaries taken as a whole, (b) the ability of the Company to perform its obligations under this Agreement and the Notes or (c) the validity or enforceability of this Agreement or the Notes.

“Memorandum” is defined in Section 5.3.

“Mortgage” means the Indenture of Mortgage and Deed of Trust dated as of January 1, 1946, as supplemented, from the Company to US Bank, N.A. (as successor to First Wisconsin Trust Company), as Trustee.

“Multiemployer Plan” means any Plan that is a “multiemployer plan” (as such term is defined in section 4001(a)(3) of ERISA).

“NAIC” means the National Association of Insurance Commissioners or any successor thereto.

“Notes” is defined in Section 1.

“Officer’s Certificate” means a certificate of a Senior Financial Officer or of any other officer of the Company whose responsibilities extend to the subject matter of such certificate.

“PBGC” means the Pension Benefit Guaranty Corporation referred to and defined in ERISA or any successor thereto.

“Permissible Encumbrances” means:

(a)

liens, neither assumed by the Company or any Principal Subsidiary nor on account of which they customarily pay interest, existing upon real estate or rights in or relating to real estate now owned or hereafter acquired or leased by the Company or any Principal Subsidiary for substation, transmission line, distribution line, pipe line, conduit or right-of-way purposes;

(b)

undetermined liens or charges incidental to construction or current operations which, in each case, are not incurred in connection with the borrowing of money, the obtaining of advances or credit or the payment of the deferred purchase price of property and which do not in the aggregate impair the use of property in the operation of the business of the Company and its Principal Subsidiaries taken as a whole;

(c)

the right reserved to, or vested in, any municipality or public authority by the terms of any franchise, grant, license or permit, or by any provision of law, to terminate such franchise, grant, license or permit or to purchase or appropriate or recapture or to designate a purchaser of any of the mortgaged property, or to demand and collect from the Company or any Principal Subsidiary any tax or other compensation for the use of streets, alleys or other public places;  

(d)

rights reserved to, or vested in, any municipality or public authority to use, control, remove or regulate any property of the Company or any Principal Subsidiary; and

(e)

rights reserved to or vested in others to take or receive any part of the electricity, gas, steam or water generated or produced by or from any property of the Company or any Principal Subsidiary.   

“Person” means an individual, partnership, corporation, limited liability company, association, trust, unincorporated organization, business entity or Governmental Authority.

“Plan” means an “employee benefit plan” (as defined in section 3(3) of ERISA) subject to Title I of ERISA that is or, within the preceding five years, has been established or maintained, or to which contributions are or, within the preceding five years, have been made or required to be made, by the Company or any ERISA Affiliate or with respect to which the Company or any ERISA Affiliate may have any liability.

“Preferred Stock” means any class of capital stock of a Person that is preferred over any other class of capital stock (or similar equity interests) of such Person as to the payment of dividends or the payment of any amount upon liquidation or dissolution of such Person.

“Principal Subsidiary” means any Subsidiary  (i) which together with its Subsidiaries has assets having an aggregate book value exceeding 10% of the Consolidated Assets of the Company and its Subsidiaries, or (ii) which together with its Subsidiaries had net income in excess of 10% of the consolidated net income of the Company and its Subsidiaries for the most recently ended period of four fiscal quarters.

“Priority Debt” means at any time the sum of (i) all Indebtedness of the Company or any Principal Subsidiary secured by any Lien other than Liens permitted by Section 10.4(a) through (o), plus (ii) all unsecured Indebtedness of Principal Subsidiaries (excluding any such Indebtedness described in this clause (ii) of any Principal Subsidiary which is (a) owing to the Company or any Principal Subsidiary or (b) existing as of September 11, 2008 and specifically described on Schedule 5.15).  

“property” or “properties” means, unless otherwise specifically limited, real or personal property of any kind, tangible or intangible, ▇▇▇▇▇▇ or inchoate.

“PTE” is defined in Section 6.2(a).

“Purchaser” is defined in the first paragraph of this Agreement.

“Qualified Institutional Buyer” means any Person who is a “qualified institutional buyer” within the meaning of such term as set forth in Rule 144A(a)(1) under the Securities Act.

“Related Fund” means, with respect to any holder of any Note, any fund or entity that (i) invests in Securities or bank loans, and (ii) is advised or managed by such holder, the same investment advisor as such holder or by an affiliate of such holder or such investment advisor.

“Required Holders” means, at any time, the holders of at least 51% in principal amount of the Notes at the time outstanding (exclusive of Notes then owned by the Company or any of its Affiliates).

“Responsible Officer” means any Senior Financial Officer and any other officer of the Company with responsibility for the administration of the relevant portion of this Agreement.

“SEC” shall mean the Securities and Exchange Commission of the United States, or any successor thereto.

“Securities” or “Security” shall have the meaning specified in Section 2(1) of the Securities Act.

“Securities Act” means the Securities Act of 1933, as amended from time to time, and the rules and regulations promulgated thereunder from time to time in effect.

“Senior Financial Officer” means the chief financial officer, principal accounting officer, treasurer or comptroller of the Company.

“Subsidiary” means, as to any Person, any other Person in which such first Person or one or more of its Subsidiaries or such first Person and one or more of its Subsidiaries owns sufficient equity or voting interests to enable it or them (as a group) ordinarily, in the absence of contingencies, to elect a majority of the directors (or Persons performing similar functions) of such second Person, and any partnership or joint venture if more than a 50% interest in the profits or capital thereof is owned by such first Person or one or more of its Subsidiaries or such first Person and one or more of its Subsidiaries (unless such partnership or joint venture can and does ordinarily take major business actions without the prior approval of such Person or one or more of its Subsidiaries).  Unless the context otherwise clearly requires, any reference to a “Subsidiary” is a reference to a Subsidiary of the Company.

“SVO” means the Securities Valuation Office of the NAIC or any successor to such Office.

“USA Patriot Act” means United States Public Law 107-56, Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism (USA PATRIOT ACT) Act of 2001, as amended from time to time, and the rules and regulations promulgated thereunder from time to time in effect.

“Wholly-Owned Subsidiary” means, at any time, any Subsidiary all of the equity interests (except directors’ qualifying shares) and voting interests of which are owned by any one or more of the Company and the Company’s other Wholly-Owned Subsidiaries at such time.

DISCLOSURE MATERIALS

1.

Annual Report on Form 10-K for the year ended December 31, 2007.

2.

Quarterly Reports on Form 10-Q for the quarters ended March 31, 2008 and June 30, 2008.

3.

Current Reports on Form 8-K dated January 18, 2008, March 12, 2008 and May 7, 2008.

SUBSIDIARIES OF THE COMPANY AND OWNERSHIP OF SUBSIDIARY STOCK

*  Remainder owned by MGE Energy, Inc., the Company’s parent corporation.

FINANCIAL STATEMENTS

1.

Report of Independent Registered Public Accounting Firm.

2.

Consolidated Statements of Income for the years ended December 31, 2007, 2006, and 2005.

3.

Consolidated Statements of Cash Flows for the years ended December 31, 2007, 2006, and 2005.

4.

Consolidated Balance Sheets as of December 31, 2007 and 2006.

5.

Consolidated Capitalization Statement as of December 31, 2007 and 2006.

6.

Consolidated Statements of Common Equity and Comprehensive Income as of December 31, 2007, 2006, and 2005.

7.

Notes to Consolidated Financial Statements referred to in paragraphs 1-6 above.

8.

Consolidated Statements of Income for the three months and six months ended June 30, 2008 and 2007 (unaudited).

9.

Consolidated Statements of Cash Flows for the three months and six months ended June 30, 2008 and 2007 (unaudited).

10.

Consolidated Balance Sheets as of June 30, 2008 and December 31, 2007 (unaudited).

11.

Notes to Consolidated Financial Statements (unaudited) referred to in paragraphs 8-10 above.

EXISTING INDEBTEDNESS AS OF JUNE 30, 2008

On August 29, 2008, the Company entered into an agreement dated August 29, 2008 with JPMorgan Chase Bank, N.A., as lender, providing the Company with a $20,000,000 committed credit facility.  The facility expires on March 31, 2009.  It is expected to be used as a backup to the Company’s commercial paper program.  No borrowings are currently outstanding under the facility.

[FORM OF NOTE]

MADISON GAS AND ELECTRIC COMPANY

5.59% SENIOR NOTE DUE SEPTEMBER 11, 2018]

No. [_____]

[Date]

$[_______]

PPN 557497 E*1

FOR VALUE RECEIVED, the undersigned, MADISON GAS AND ELECTRIC COMPANY (herein called the “Company”), a corporation organized and existing under the laws of the State of Wisconsin, hereby promises to pay to [____________], or registered assigns, the principal sum of [_____________________] DOLLARS (or so much thereof as shall not have been prepaid) on September 11, 2018, with interest (computed on the basis of a 360-day year of twelve 30-day months) (a) on the unpaid balance hereof at the rate of 5.59% per annum from the date hereof, payable semiannually, on the 11th day of March and September in each year, commencing with the March or September 11th next succeeding the date hereof, until the principal hereof shall have become due and payable, and (b) to the extent permitted by law, on any overdue payment (including any overdue prepayment) of principal, any overdue payment of interest and any overdue payment of any Make-Whole Amount, payable semiannually as aforesaid (or, at the option of the registered holder hereof, on demand), at a rate per annum from time to time equal to the greater of (i) 7.59% and (ii) 2.00% over the rate of interest publicly announced by JPMorgan Chase Bank, N.A. from time to time in New York, New York as its “base” or “prime” rate.