Document:

Exhibit 4.1

 

Execution Version

 

May 1,
2008

 

REGISTRATION RIGHTS AGREEMENT

 

This REGISTRATION RIGHTS
AGREEMENT dated May 1, 2008 (this “Agreement”) is entered into
by and among MarkWest Energy Partners L.P., a limited partnership organized
under the laws of the State of Delaware (the “Partnership”), MarkWest
Energy Finance Corporation, a corporation organized under the laws of the State
of Delaware (“Finance Corp” and, together with the Partnership, the “Issuers”),
the guarantors  listed on the signature pages hereto
(the “Guarantors”), and J.P. Morgan Securities Inc., RBC Capital Markets Corporation, Wachovia
Capital Markets, LLC, Banc of America Securities LLC, Credit Suisse Securities
(USA) LLC, Deutsche Bank Securities Inc., Fortis Securities LLC and SunTrust
Robinson Humphrey, Inc. (collectively, the “Initial Purchasers”).

 

The Issuers, the
Guarantors and the Initial Purchasers are parties to that certain Purchase
Agreement dated April 28, 2008 (the “Purchase Agreement”), which
provides for the sale by the Issuers to the Initial Purchasers of $100,000,000
aggregate principal amount of the Issuers’ 8.75% Senior Notes due 2018 (the “Securities”)
which will be guaranteed on an unsecured senior basis by each of the
Guarantors.  The Securities will be
issued as additional debt securities pursuant to an Indenture, dated as of April 15,
2008, among the Issuers, the Guarantors and Wells Fargo Bank, National
Association, as trustee, pursuant to which the Issuers previously issued
$400,000,000 aggregate principal amount of its 8.75% Senior Notes due 2018 (the
“Original Securities”), as supplemented by the First Supplemental
Indenture thereto dated as of April 25, 2008 (such Indenture, as so
supplemented, being referred to herein as the “Indenture”).  As an inducement to the Initial Purchasers to
enter into the Purchase Agreement, the Issuers and the Guarantors have agreed
to provide to the Initial Purchasers and their direct and indirect transferees
the registration rights set forth in this Agreement.  The execution and delivery of this Agreement
is a condition to the closing under the Purchase Agreement.

 

In consideration of the
foregoing, the parties hereto agree as follows:

 

1.             Definitions.  As used in this Agreement, the following
terms shall have the following meanings:

 

“Business
Day” shall have the meaning ascribed thereto in the Indenture.

 

“DTC” shall mean
the Depository Trust Company.

 

“Exchange Act”
shall mean the Securities Exchange Act of 1934, as amended from time to time.

 

“Exchange Dates”
shall have the meaning set forth in Section 2(a)(ii) hereof.

 

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“Exchange
Offer” shall mean the exchange offer by the Issuers and the Guarantors of
Exchange Securities for Registrable Securities pursuant to Section 2(a) hereof.

 

“Exchange Offer
Registration” shall mean a registration under the Securities Act effected
pursuant to Section 2(a) hereof.

 

“Exchange Offer
Registration Statement” shall mean an exchange offer registration statement
on Form S-4 (or, if applicable, on another appropriate form) and all
amendments and supplements to such registration statement, in each case
including the Prospectus contained therein, all exhibits thereto and any
document incorporated by reference therein.

 

“Exchange Securities”
shall mean senior notes issued by the Issuers and guaranteed by the Guarantors
under the Indenture containing terms identical to the Securities (except that
the Exchange Securities will not be subject to restrictions on transfer or to
any increase in annual interest rate for failure to comply with this Agreement)
and to be offered to Holders of Securities in exchange for Securities pursuant
to the Exchange Offer.

 

“Finance Corp”
shall have the meaning set forth in the preamble and shall also include Finance
Corp’s successors.

 

“FINRA” shall mean
the Financial Industry
Regulatory Authority, Inc.

 

“Guarantors” shall
have the meaning set forth in the preamble and shall also include any Guarantor’s
successors.

 

“Holders” shall
mean the Initial Purchasers, for so long as they own any Registrable
Securities, and each of their successors, assigns and direct and indirect
transferees who become owners of Registrable Securities under the Indenture;
provided that for purposes of Sections 4 and 5 of this Agreement, the term “Holders”
shall include Participating Broker-Dealers.

 

“Indemnified Person”
shall have the meaning set forth in Section 5(c) hereof.

 

“Indemnifying Person”
shall have the meaning set forth in Section 5(c) hereof.

 

“Indenture” shall
have the meaning set forth in the recital.

 

“Initial Purchasers”
shall have the meaning set forth in the preamble.

 

“Inspector” shall
have the meaning set forth in Section 3(a)(xiii) hereof.

 

“Issuer FWP” shall
have the meaning set forth in Section 5(a) hereof.

 

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“Issuers” shall
have the meaning set forth in the preamble.

 

“Majority Holders”
shall mean the Holders of a majority of the aggregate principal amount of the
outstanding Registrable Securities; provided that whenever the consent or
approval of Holders of a specified percentage of Registrable Securities is
required hereunder, any Registrable Securities owned directly or indirectly by
the Issuers or any of their affiliates shall not be counted in determining
whether such consent or approval was given by the Holders of such required
percentage or amount; and provided, further, that if the Issuers shall issue
any additional Securities under the Indenture prior to consummation of the
Exchange Offer or, if applicable, the effectiveness of any Shelf Registration
Statement, such additional Securities and the Registrable Securities to which
this Agreement relates shall be treated together as one class for purposes of
determining whether the consent or approval of Holders of a specified percentage
of Registrable Securities has been obtained.

 

“Participating
Broker-Dealers” shall have the meaning set forth in Section 4(a) hereof.

 

“Partnership”
shall have the meaning set forth in the preamble and shall also include the
Partnership’s successors.

 

“Person” shall
mean an individual, partnership, limited liability company, corporation, trust
or unincorporated organization, or a government or agency or political
subdivision thereof.

 

“Prospectus” shall
mean the prospectus included in a Registration Statement, including any
preliminary prospectus, and any such prospectus as amended or supplemented by
any prospectus supplement, including a prospectus supplement with respect to
the terms of the offering of any portion of the Registrable Securities covered
by a Shelf Registration Statement, and by all other amendments and supplements
to such prospectus, and in each case including any document incorporated by
reference therein.

 

“Purchase Agreement”
shall have the meaning set forth in the recital.

 

“Registrable
Securities” shall mean the Securities; provided that the Securities shall
cease to be Registrable Securities (i) when a Registration Statement with
respect to such Securities has been declared effective under the Securities Act
and such Securities have been exchanged or disposed of pursuant to such
Registration Statement, (ii) when such Securities are freely tradeable
pursuant to Rule 144 (or any similar provision then in force, but not Rule 144A)
under the Securities Act by Persons other than any affiliate of either of the
Issuers (as such term is defined in Rule 144) or (iii) when such
Securities cease to be outstanding.

 

“Registration Expenses”
shall mean any and all expenses incident to performance of or compliance by the
Issuers and the Guarantors with this Agreement, including without limitation: (i) all
SEC, stock exchange or
FINRA registration and filing fees, (ii) 

 

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all fees and expenses incurred in connection
with compliance with state securities or blue sky laws (including
reasonable fees and disbursements of counsel for any Underwriters or Holders in
connection with blue sky qualification of any Exchange Securities or
Registrable Securities), (iii) all expenses of any Persons in preparing or
assisting in preparing, word processing, printing and distributing any
Registration Statement, any Prospectus and any amendments or supplements
thereto, any underwriting agreements, securities sales agreements or other
similar agreements and any other documents relating to the performance of and
compliance with this Agreement, (iv) all rating agency fees, (v) all
fees and disbursements relating to the qualification of the Indenture under
applicable securities laws, including without limitation the Trust Indenture
Act, (vi) the fees and disbursements of the Trustee and its counsel, (vii) the
fees and disbursements of counsel for the Issuers and the Guarantors and, in
the case of a Shelf Registration Statement, the fees and disbursements of one
counsel for the Holders (which counsel shall be selected by the Majority
Holders and which counsel may also be counsel for the Initial Purchasers) and (viii) the
fees and disbursements of the independent public accountants of the Issuers and
the Guarantors, including the expenses of any special audits or “comfort”
letters required by or incident to the performance of and compliance with this
Agreement, but excluding fees and expenses of counsel to the Underwriters
(other than fees and expenses set forth in clause (ii) above) or the
Holders and underwriting discounts and commissions, brokerage commissions and
transfer taxes, if any, relating to the sale or disposition of Registrable
Securities by a Holder.

 

“Registration
Statement” shall mean any registration statement of the Issuers and the
Guarantors that covers any of the Exchange Securities or Registrable Securities
pursuant to the provisions of this Agreement and all amendments and supplements
to any such registration statement, including post-effective amendments, in
each case including the Prospectus contained therein, all exhibits thereto and
any document incorporated by reference therein.

 

“SEC” shall mean
the United States Securities and Exchange Commission.

 

“Securities” shall
have the meaning set forth in the recital.

 

“Securities Act”
shall mean the Securities Act of 1933, as amended from time to time.

 

“Shelf Effectiveness
Period” shall have the meaning set forth in Section 2(b) hereof.

 

“Shelf Registration”
shall mean a registration effected pursuant to Section 2(b) hereof.

 

“Shelf Registration
Statement” shall mean a “shelf” registration statement of the Issuers and
the Guarantors that covers all or a portion of the Registrable Securities (but
no other securities unless approved by the Holders of a majority of the
Registrable Securities to be covered by such Shelf Registration Statement) on
an appropriate form 

 

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under Rule 415 under the Securities Act, or any similar rule that
may be adopted by the SEC, and all amendments and supplements to such
registration statement, including post-effective amendments, in each case
including the Prospectus contained therein, all exhibits thereto and any
document incorporated by reference therein.

 

“Staff” shall mean
the staff of the SEC.

 

“Target Registration
Date” shall have the meaning set for in Section 2(d) hereof.

 

“Trust Indenture Act”
shall mean the Trust Indenture Act of 1939, as amended from time to time.

 

“Trustee” shall
mean the trustee with respect to the Securities under the Indenture.

 

“Underwriter”
shall have the meaning set forth in Section 3(f) hereof.

 

“Underwritten Offering”
shall mean an offering in which Registrable Securities are sold to an
Underwriter for reoffering to the public.

 

2.             Registration Under
the Securities Act.  (a)  To the
extent not prohibited by any applicable law or applicable interpretations of
the Staff, the Issuers and the Guarantors shall use their reasonable best
efforts to cause to be filed an Exchange Offer Registration Statement covering
an offer to the Holders to exchange all the Registrable Securities for Exchange
Securities.  The Issuers and the
Guarantors shall commence the Exchange Offer promptly after the Exchange Offer
Registration Statement is declared effective by the SEC and use their
reasonable best efforts to complete the Exchange Offer not later than 60 days
after such effective date.

 

Notwithstanding any other
provision of this Agreement to the contrary, the Exchange Offer may be combined
with the exchange offer for the Original Securities, and the Exchange Offer
Registration Statement may register securities to be offered pursuant to both
the Exchange Offer and the exchange offer for the Original Securities.

 

The Issuers and the
Guarantors shall commence the Exchange Offer by mailing the related Prospectus,
appropriate letters of transmittal and other accompanying documents to each
Holder stating, in addition to such other disclosures as are required by
applicable law, substantially the following:

 

(i)            that the
Exchange Offer is being made pursuant to this Agreement and that all
Registrable Securities validly tendered and not properly withdrawn will be
accepted for exchange;

 

(ii)           the
dates of acceptance for exchange (which shall be a period of at least 20
Business Days from the date such notice is mailed) (the “Exchange Dates”);

 

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(iii)          that any Registrable Security not tendered
will remain outstanding and continue to accrue interest but will not retain any
rights under this Agreement;

 

(iv)          that
any Holder electing to have a Registrable Security exchanged pursuant to the
Exchange Offer will be required, (x) in the case a Holder electing to
exchange a Registrable Security in global form, to comply with the applicable
procedures of DTC for book-entry tenders, and, (y) in the case of a Holder
electing to exchange a Registrable Security in certificated form, to surrender
such Registrable Security, together with the appropriate letters of
transmittal, to the institution and at the address (located in the Borough of
Manhattan, The City of New York) and in the manner specified in the notice,
prior to the close of business on the last Exchange Date; and

 

(v)           that
any Holder will be entitled to withdraw its election, not later than the close
of business on the last Exchange Date, by, (x) in the case of a Holder
withdrawing its election to exchange a Registrable Security in global form,
complying with the applicable procedures of DTC for withdrawal of tenders, and,
(y) in the case of a Holder withdrawing its election to exchange a
Registrable Security in certificated form, sending to the institution and at
the address (located in the Borough of Manhattan, The City of New York)
specified in the notice, a telegram, facsimile transmission or letter setting
forth the name of such Holder, the principal amount of Registrable Securities
delivered for exchange and a statement that such Holder is withdrawing its
election to have such Securities exchanged.

 

As a condition to participating in the Exchange Offer, a
Holder will be required to represent to the Issuers and the Guarantors that (i) any
Exchange Securities to be received by it will be acquired in the ordinary
course of its business, (ii) at the time of the commencement of the
Exchange Offer it has no arrangement or understanding with any Person to
participate in the distribution (within the meaning of the Securities Act) of
the Exchange Securities in violation of the provisions of the Securities Act, (iii) it
is not an “affiliate” (within the meaning of Rule 405 under the Securities
Act) of either of the Issuers or any Guarantor and (iv) if such Holder is
a broker-dealer that will receive Exchange Securities for its own account in
exchange for Registrable Securities that were acquired as a result of
market-making or other trading activities, then such Holder will deliver a
Prospectus in connection with any resale of such Exchange Securities.

 

As soon as practicable
after the last Exchange Date, the Issuers and the Guarantors shall:

 

(i)            accept
for exchange Registrable Securities or portions thereof validly tendered and
not properly withdrawn pursuant to the Exchange Offer; and

 

(ii)           deliver,
or cause to be delivered, to the Trustee for cancellation all Registrable
Securities or portions thereof so accepted for exchange by the Issuers and
issue, and cause the Trustee to promptly authenticate and deliver to each
Holder, 

 

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Exchange
Securities equal in principal amount to the principal amount of the Registrable
Securities surrendered by such Holder.

 

The Issuers and the
Guarantors shall use their reasonable best efforts to complete the Exchange
Offer as provided above and shall comply with the applicable requirements of
the Securities Act, the Exchange Act and other applicable laws and regulations
in connection with the Exchange Offer. 
The Exchange Offer shall not be subject to any conditions, other than
that the Exchange Offer does not violate any applicable law or applicable
interpretations of the Staff.

 

(b)           In the event that (i) the
Issuers and the Guarantors determine that the Exchange Offer Registration
provided for in Section 2(a) above is not available or may not be
completed as soon as practicable after the last Exchange Date because it would
violate any applicable law or applicable interpretations of the Staff, (ii) the
Exchange Offer is not for any other reason completed by October 15, 2008
or (iii) any Initial Purchaser
shall so request in connection with any offer or sale of Registrable Securities
that are not eligible to be exchanged for Exchange Securities, the
Issuers and the Guarantors shall use their reasonable best efforts to cause to
be filed as soon as practicable after such determination, date or request, as
the case may be, a Shelf Registration Statement providing for the sale of all
the Registrable Securities by the Holders thereof and to have such Shelf
Registration Statement declared effective by the SEC.

 

In the event that the
Issuers and the Guarantors are required to file a Shelf Registration Statement
pursuant to clause (iii) of the preceding sentence, the Issuers and the
Guarantors shall use their reasonable best efforts to file and have declared
effective by the SEC both an Exchange Offer Registration Statement pursuant to Section 2(a) with
respect to all Registrable Securities and a Shelf Registration Statement (which
may be a combined Registration Statement with the Exchange Offer Registration
Statement) with respect to offers and sales of Registrable Securities held by the
Initial Purchasers after completion of the Exchange Offer.

 

The Issuers and the
Guarantors agree to use their reasonable best efforts to keep the Shelf
Registration Statement continuously effective for one year, or such shorter
period that will terminate when all the Registrable Securities covered by the
Shelf Registration Statement have been sold pursuant to the Shelf Registration
Statement (the “Shelf Effectiveness Period”).  The Issuers and the Guarantors further agree
to supplement or amend the Shelf Registration Statement and the related
Prospectus if required by the rules, regulations or instructions applicable to
the registration form used by the Issuers for such Shelf Registration Statement
or by the Securities Act or by any other rules and regulations thereunder
for shelf registration or if reasonably requested by a Holder of Registrable
Securities with respect to information relating to such Holder, and to use
their reasonable best efforts to cause any such amendment to become effective
and such Shelf Registration Statement and Prospectus to become usable as soon
as thereafter practicable.  The Issuers
and the Guarantors agree to furnish to the Holders of 

 

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Registrable Securities copies of any such supplement or amendment
promptly after its being used or filed with the SEC.

 

(c)           The Issuers and the
Guarantors shall pay all Registration Expenses in connection with any
registration pursuant to Section 2(a) or Section 2(b) hereof.  Each Holder shall pay all underwriting
discounts and commissions, brokerage commissions and transfer taxes, if any,
relating to the sale or disposition of such Holder’s Registrable Securities
pursuant to the Shelf Registration Statement.

 

(d)           An Exchange Offer
Registration Statement pursuant to Section 2(a) hereof or a Shelf
Registration Statement pursuant to Section 2(b) hereof will not be
deemed to have become effective unless it has been declared effective by the
SEC.

 

In the event that either
the Exchange Offer is not completed or the Shelf Registration Statement, if
required hereby, is not declared effective on or prior to October 15, 2008
(the “Target Registration Date”), the interest rate on the Registrable
Securities will be increased by (i) 0.25% per annum for the first 90-day
period immediately following the Target Registration Date and (ii) an
additional 0.25% per annum with respect to each subsequent 90-day period, in
each case until the Exchange Offer is completed or the Shelf Registration
Statement, if required hereby, is declared effective by the SEC no longer
qualify as Registrable Securities, up to a maximum of 1.00% per annum of
additional interest; provided that if an obligation to file a Shelf
Registration Statement arises pursuant to Section 2(b)(iii) and the
applicable Initial Purchaser does not make the request to file a Shelf
Registration Statement by August 15, 2008, then the Target
Registration Date shall be extended by the number of days from and including August 15,
2008 to and including the date on which such request is made.

 

If the Shelf Registration Statement, if required
hereby, has been declared effective and thereafter either ceases to be
effective or the Prospectus contained therein ceases to be usable at any time
during the Shelf Effectiveness Period, and such failure to remain effective or
usable exists for more than 60 days (whether or not consecutive) in any
12-month period, then the interest rate on the Registrable Securities will be
increased by (i) 0.50% per annum commencing on the 61st day in such
12-month period and (ii) an additional 0.25% per annum with respect to
each subsequent 90-day period (whether or not consecutive) and ending on such
date that the Shelf Registration Statement has again been declared effective or
the Prospectus again becomes usable, up to a maximum of 1.00% per annum of
additional interest.

 

(e)           Without limiting the
remedies available to the Initial Purchasers and the Holders, the Issuers and
the Guarantors acknowledge that any failure by the Issuers or the Guarantors to
comply with their obligations under Section 2(a) and Section 2(b) hereof
may result in material irreparable injury to the Initial Purchasers or the
Holders for which there is no adequate remedy at law, that it will not be
possible to measure damages for such injuries precisely and that, in the event
of any such failure, the Initial Purchasers or 

 

8

 

any Holder may obtain such relief as may be required to specifically
enforce the Issuers’ and the Guarantors’ obligations under Section 2(a) and
Section 2(b) hereof.

 

3.             Registration
Procedures.  (a) In connection
with their obligations pursuant to Section 2(a) and Section 2(b) hereof,
the Issuers and the Guarantors shall as expeditiously as possible:

 

(i)            prepare and file with
the SEC a Registration Statement on the appropriate form under the Securities
Act, which form (x) shall be selected by the Issuers and the Guarantors, (y) shall,
in the case of a Shelf Registration, be available for the sale of the Registrable
Securities by the Holders thereof and (z) shall comply as to form in all
material respects with the requirements of the applicable form and include all
financial statements required by the SEC to be filed therewith; and use their
reasonable best efforts to cause such Registration Statement to become
effective and remain effective for the applicable period in accordance with Section 2
hereof;

 

(ii)           prepare and file with
the SEC such amendments and post-effective amendments to each Registration Statement
as may be necessary to keep such Registration Statement effective for the
applicable period in accordance with Section 2 hereof and cause each
Prospectus to be supplemented by any required prospectus supplement and, as so
supplemented, to be filed pursuant to Rule 424 under the Securities Act;
and keep each Prospectus current during the period described in Section 4(3) of
and Rule 174 under the Securities Act that is applicable to transactions
by brokers or dealers with respect to the Registrable Securities or Exchange
Securities;

 

(iii)          in the case of a Shelf
Registration, furnish to each Holder of Registrable Securities, to counsel for
the Initial Purchasers, to counsel for such Holders and to each Underwriter of
an Underwritten Offering of Registrable Securities, if any, without charge, as
many copies of each Prospectus, including each preliminary Prospectus, and any
amendment or supplement thereto, in order to facilitate the sale or other
disposition of the Registrable Securities thereunder; and the Issuers and the
Guarantors consent to the use of such Prospectus and any amendment or
supplement thereto in accordance with applicable law by each of the Holders of
Registrable Securities and any such Underwriters in connection with the
offering and sale of the Registrable Securities covered by and in the manner
described in such Prospectus or any amendment or supplement thereto in
accordance with applicable law;

 

(iv)          use their reasonable
best efforts to register or qualify the Registrable Securities under all
applicable state securities or blue sky laws of such jurisdictions in the
United States as any Holder of Registrable Securities covered by a Registration
Statement shall reasonably request in writing by the time the applicable
Registration Statement is declared effective by the SEC; cooperate with such
Holders in connection with any filings required to be made with FINRA; and do any and all other acts
and things that may be reasonably necessary or advisable to enable each Holder
to complete the disposition in each such jurisdiction of the Registrable
Securities owned by such Holder; provided that none of the Issuers or
the Guarantors shall be required to (1) qualify as a 

 

9

 

foreign corporation or other entity or as a dealer in securities in any
such jurisdiction where it would not otherwise be required to so qualify, (2) file
any general consent to service of process in any such jurisdiction or (3) subject
itself to taxation in any such jurisdiction if it is not so subject;

 

(v)           in the case of a Shelf
Registration, notify each Holder of Registrable Securities, counsel for such
Holders and counsel for the Initial Purchasers promptly and, if requested by
any such Holder or counsel, confirm such advice in writing (1) when a
Registration Statement has become effective and when any post-effective
amendment thereto has been filed and becomes effective, (2) of any request
by the SEC or any state securities authority for amendments and supplements to
a Registration Statement and Prospectus or for additional information after the
Registration Statement has become effective, (3) of the issuance by the
SEC or any state securities authority of any stop order suspending the
effectiveness of a Registration Statement or the initiation of any proceedings
for that purpose, (4) if, between the effective date of a Registration
Statement and the closing of any sale of Registrable Securities covered
thereby, the representations and warranties of either of the Issuers or any
Guarantor contained in any underwriting agreement, securities sales agreement
or other similar agreement, if any, relating to an offering of such Registrable
Securities cease to be true and correct in all material respects or if either
of the Issuers or any Guarantor receives any notification with respect to the
suspension of the qualification of the Registrable Securities for sale in any
jurisdiction or the initiation of any proceeding for such purpose, (5) of
the happening of any event during the period a Shelf Registration Statement is
effective that makes any statement made in such Registration Statement or the
related Prospectus untrue in any material respect or that requires the making
of any changes in such Registration Statement or Prospectus in order to make
the statements therein not misleading and (6) of any determination by
either of the Issuers or any Guarantor that a post-effective amendment to a
Registration Statement would be appropriate;

 

(vi)          use their reasonable
best efforts to obtain the withdrawal of any order suspending the effectiveness
of a Registration Statement at the earliest possible moment and provide
immediate notice to each Holder of the withdrawal of any such order;

 

(vii)         in the case of a Shelf
Registration, furnish to each Holder of Registrable Securities, without charge,
at least one conformed copy of each Registration Statement and any
post-effective amendment thereto (without any documents incorporated therein by
reference or exhibits thereto, unless requested);

 

(viii)        in the case of a Shelf
Registration, cooperate with the Holders of any Registrable Securities in
certificated form to facilitate the timely preparation and delivery of
certificates representing Registrable Securities to be sold and not bearing any
restrictive legends and enable such Registrable Securities to be issued in such
denominations and registered in such names (consistent with the provisions of
the Indenture) as such Holders may reasonably request at least one Business Day
prior to the closing of any sale of Registrable Securities in certificated
form;

 

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(ix)           in the case of a Shelf Registration,
upon the occurrence of any event contemplated by Section 3(a)(v)(5) hereof,
use their reasonable best efforts to prepare and file with the SEC a supplement
or post-effective amendment to such Shelf Registration Statement or the related
Prospectus or any document incorporated therein by reference or file any other
required document so that, as thereafter delivered to purchasers of the
Registrable Securities, such Prospectus will not contain any untrue statement
of a material fact or omit to state a material fact necessary to make the
statements therein, in the light of the circumstances under which they were
made, not misleading; and the Issuers and the Guarantors shall notify the
Holders of Registrable Securities to suspend use of the Prospectus as promptly
as practicable after the occurrence of such an event, and such Holders hereby
agree to suspend use of the Prospectus until the Issuers and the Guarantors
have amended or supplemented the Prospectus to correct such misstatement or
omission;

 

(x)            a reasonable time prior to the
filing of any Registration Statement, any Prospectus, any amendment to a
Registration Statement or amendment or supplement to a Prospectus or of any
document that is to be incorporated by reference into a Registration Statement
or a Prospectus after initial filing of a Registration Statement, provide
copies of such document to the Initial Purchasers and their counsel (and, in
the case of a Shelf Registration Statement, to the Holders of Registrable
Securities and their counsel) and make such of the representatives of the
Issuers and the Guarantors as shall be reasonably requested by the Initial
Purchasers or their counsel (and, in the case of a Shelf Registration
Statement, the Holders of Registrable Securities or their counsel) available
for discussion of such document; and the Issuers and the Guarantors shall not,
at any time after initial filing of a Registration Statement, file any
Prospectus, any amendment of or supplement to a Registration Statement or a
Prospectus, or any document that is to be incorporated by reference into a
Registration Statement or a Prospectus, of which the Initial Purchasers and
their counsel (and, in the case of a Shelf Registration Statement, the Holders
of Registrable Securities and their counsel) shall not have previously been
advised and furnished a copy or to which the Initial Purchasers or their
counsel (and, in the case of a Shelf Registration Statement, the Holders of
Registrable Securities or their counsel) shall object; provided, that
this clause shall not apply to any filing by the Partnership of any Annual
Report on Form 10-K, Quarterly Report on Form 10-Q or Current Report
on Form 8-K with respect to matters unrelated to the Securities and the
offering or exchange therefor;

 

(xi)           obtain a CUSIP number for all
Exchange Securities or Registrable Securities, as the case may be, not later
than the effective date of a Registration Statement;

 

(xii)          cause the Indenture to be qualified
under the Trust Indenture Act in connection with the registration of the
Exchange Securities or Registrable Securities, as the case may be; cooperate
with the Trustee and the Holders to effect such changes to the Indenture as may
be required for the Indenture to be so qualified in accordance with the terms
of the Trust Indenture Act; and execute, and use their reasonable best efforts
to cause the Trustee to execute, all documents as may be required to effect
such changes and 

 

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all other forms and
documents required to be filed with the SEC to enable the Indenture to be so
qualified in a timely manner;

 

(xiii)                          in the case of a Shelf Registration, make
available for inspection by a representative of the Holders of the Registrable
Securities (an “Inspector”), any Underwriter participating in any
disposition pursuant to such Shelf Registration Statement, any attorneys and
accountants designated by the Holders of Registrable Securities and any
attorneys and accountants designated by such Underwriter, at reasonable times
and in a reasonable manner, all pertinent financial and other records,
documents and properties of the Issuers and the Guarantors, and cause the
respective officers, directors and employees of the Issuers and the Guarantors
to supply all information reasonably requested by any such Inspector,
Underwriter, attorney or accountant in connection with a Shelf Registration
Statement; provided that if any such information is identified by
either of the Issuers or any Guarantor as being confidential or proprietary,
each Person receiving such information shall take such actions as are
reasonably necessary to protect the confidentiality of such information to the
extent such action is otherwise not inconsistent with, an impairment of or in
derogation of the rights and interests of any Inspector, Holder or
Underwriter);

 

(xiv)        in the case of a Shelf Registration, use
their reasonable best efforts to cause all Registrable Securities to be listed
on any securities exchange or any automated quotation system on which similar
securities issued or guaranteed by either of the Issuers or any Guarantor are
then listed if requested by the Majority Holders, to the extent such
Registrable Securities satisfy applicable listing requirements;

 

(xv)         if reasonably requested by any Holder
of Registrable Securities covered by a Shelf Registration Statement, promptly
include in a Prospectus supplement or post-effective amendment such information
with respect to such Holder as such Holder reasonably requests to be included
therein and make all required filings of such Prospectus supplement or such
post-effective amendment as soon as the Issuers have received notification of
the matters to be so included in such filing; and

 

(xvi)        in the case of a Shelf Registration,
enter into such customary agreements and take all such other actions in
connection therewith (including those requested by the Holders of a majority in
principal amount of the Registrable Securities being sold) in order to expedite
or facilitate the disposition of such Registrable Securities including, but not
limited to, an Underwritten Offering and in such connection, (1) to the
extent possible, make such representations and warranties to the Holders and
any Underwriters of such Registrable Securities with respect to the business of
the Issuers and their subsidiaries and the Registration Statement, Prospectus
and documents incorporated by reference or deemed incorporated by reference, if
any, in each case, in form, substance and scope as are customarily made by
issuers to underwriters in underwritten offerings and confirm the same if and
when requested, (2) obtain opinions of counsel to the Issuers and the
Guarantors (which counsel and opinions, in form, scope and substance, shall be
reasonably satisfactory to the Holders and such Underwriters and their
respective counsel) addressed to each selling Holder and Underwriter of
Registrable Securities, 

 

12

 

covering the matters
customarily covered in opinions requested in underwritten offerings, (3) obtain
“comfort” letters from the independent registered public accounting firm of the
Issuers and the Guarantors (and, if necessary, any other independent registered
public accounting firm of any subsidiary of either of the Issuers or any
Guarantor, or of any business acquired by either of the Issuers or any
Guarantor for which financial statements and financial data are or are required
to be included in the Registration Statement) addressed to each selling Holder
and Underwriter of Registrable Securities, such letters to be in customary form
and covering matters of the type customarily covered in “comfort” letters in
connection with underwritten offerings and (4) deliver such documents and
certificates as may be reasonably requested by the Holders of a majority in
principal amount of the Registrable Securities being sold or the Underwriters,
and which are customarily delivered in underwritten offerings, to evidence the
continued validity of the representations and warranties of the Issuers and the
Guarantors made pursuant to clause (1) above and to evidence compliance
with any customary conditions contained in an underwriting agreement.

 

(b)           The Issuers shall not, without the
prior consent of the Initial Purchasers (such consent not to be unreasonably
withheld), make any offer relating to the Securities that would reasonably be
expected to constitute a “free writing prospectus,” as defined in Rule 405
under the Securities Act.

 

(c)           In the case of a Shelf Registration
Statement, the Issuers may require each Holder of Registrable Securities to
furnish to the Issuers such information regarding such Holder and the proposed
disposition by such Holder of such Registrable Securities as the Issuers and
the Guarantors may from time to time reasonably request in writing.

 

(d)           In the case of a Shelf Registration
Statement, each Holder of Registrable Securities agrees that, upon receipt of
any notice from the Issuers and the Guarantors of the happening of any event of
the kind described in Section 3(a)(v)(3) or 3(a)(v)(5) hereof,
such Holder will forthwith discontinue disposition of Registrable Securities
pursuant to the Shelf Registration Statement until such Holder’s receipt of the
copies of the supplemented or amended Prospectus contemplated by Section 3(a)(ix) hereof
and, if so directed by the Issuers and the Guarantors, such Holder will deliver
to the Issuers and the Guarantors all copies in its possession, other than
permanent file copies then in such Holder’s possession, of the Prospectus
covering such Registrable Securities that is current at the time of receipt of
such notice.

 

(e)           If the Issuers and the Guarantors
shall give any notice pursuant to Section 3(d) hereof to suspend the
disposition of Registrable Securities pursuant to a Shelf Registration
Statement, the Issuers and the Guarantors shall extend the period during which
such Shelf Registration Statement shall be maintained effective pursuant to
this Agreement by the number of days during the period from and including the
date of the giving of such notice to and including the date when the Holders of
such Registrable Securities shall have received copies of the supplemented or
amended Prospectus necessary to resume such dispositions.  Any such suspensions shall not, in the
aggregate, exceed 90 days during any 365-day period.

 

13

 

(f)            The Holders of Registrable
Securities covered by a Shelf Registration Statement who desire to do so may
sell such Registrable Securities in an Underwritten Offering.  In any such Underwritten Offering, the
investment bank or investment banks and manager or managers (each an “Underwriter”)
that will administer the offering will be selected by the Holders of a majority
in principal amount of the Registrable Securities included in such offering.

 

4.             Participation of Broker-Dealers in Exchange Offer.  (a)  The Staff has taken the position
that any broker-dealer that receives Exchange Securities for its own account in
the Exchange Offer in exchange for Securities that were acquired by such
broker-dealer as a result of market-making or other trading activities (a “Participating
Broker-Dealer”) may be deemed to be an “underwriter” within the meaning of
the Securities Act and must deliver a prospectus meeting the requirements of
the Securities Act in connection with any resale of such Exchange Securities.

 

The Issuers and the
Guarantors understand that it is the Staff’s position that if the Prospectus
contained in the Exchange Offer Registration Statement includes a plan of
distribution containing a statement to the above effect and the means by which
Participating Broker-Dealers may resell the Exchange Securities, without naming
the Participating Broker-Dealers or specifying the amount of Exchange Securities
owned by them, such Prospectus may be delivered by Participating Broker-Dealers
to satisfy their prospectus delivery obligation under the Securities Act in
connection with resales of Exchange Securities for their own accounts, so long
as the Prospectus otherwise meets the requirements of the Securities Act.

 

(b)           In light of the above, and
notwithstanding the other provisions of this Agreement, the Issuers and the
Guarantors agree to amend or supplement the Prospectus contained in the
Exchange Offer Registration Statement for a period of up to 180 days after the
last Exchange Date (as such period may be extended pursuant to Section 3(e) of
this Agreement), if requested by the Initial Purchasers or by one or more
Participating Broker-Dealers, in order to expedite or facilitate the
disposition of any Exchange Securities by Participating Broker-Dealers
consistent with the positions of the Staff recited in Section 4(a) above.  The Issuers and the Guarantors further agree
that Participating Broker-Dealers shall be authorized to deliver such
Prospectus during such period in connection with the resales contemplated by
this Section 4.

 

(c)           The Initial Purchasers shall have no
liability to either of the Issuers, any Guarantor or any Holder with respect to
any request that they may make pursuant to Section 4(b) above.

 

5.             Indemnification and Contribution.  (a)  Each Issuer and each Guarantor,
jointly and severally, agree to indemnify and hold harmless each Initial
Purchaser and each Holder, their respective affiliates, directors and officers
and each Person, if any, who controls any Initial Purchaser or any Holder
within the meaning of Section 15 of the Securities Act or Section 20
of the Exchange Act, from and against any and all losses, claims, damages and
liabilities (including, without limitation, legal fees and other 

 

14

 

expenses incurred in
connection with any suit, action or proceeding or any claim asserted, as such
fees and expenses are incurred), that arise out of, or are based upon, any
untrue statement or alleged untrue statement of a material fact contained in
any Registration Statement, any Prospectus or any “issuer free writing
prospectus,” as defined in Rule 433 under the Securities Act (“Issuer
FWP”), or any omission or alleged omission to state therein a material fact
required to be stated therein or necessary in order to make the statements
therein, in the light of the circumstances under which they were made, not
misleading, except insofar as such losses, claims, damages or liabilities arise
out of, or are based upon, any untrue statement or omission or alleged untrue
statement or omission made in reliance upon and in conformity with any
information relating to any Initial Purchaser or information relating to any
Holder furnished to the Issuers in writing by or on behalf of such Initial
Purchaser or selling Holder expressly for use therein.  In connection with any Underwritten Offering
permitted by Section 3, the Issuers and the Guarantors, jointly and severally,
will also indemnify the Underwriters, if any, selling brokers, dealers and
similar securities industry professionals participating in the distribution,
their respective affiliates and each Person who controls such Persons (within
the meaning of the Securities Act and the Exchange Act) to the same extent as
provided above with respect to the indemnification of the Holders, if requested
in connection with any Registration Statement.

 

(b)           Each Holder agrees, severally and not
jointly, to indemnify and hold harmless the Issuers, the Guarantors, the
Initial Purchasers and the other selling Holders, the directors of the Issuers
and the Guarantors, each officer of the Issuers and the Guarantors who signed
the Registration Statement and each Person, if any, who controls the Issuers,
the Guarantors, any Initial Purchaser and any other selling Holder within the
meaning of Section 15 of the Securities Act or Section 20 of the
Exchange Act to the same extent as the indemnity set forth in paragraph (a) above,
but only with respect to any losses, claims, damages or liabilities that arise
out of, or are based upon, any untrue statement or omission or alleged untrue
statement or omission made in reliance upon and in conformity with any
information relating to such Holder furnished to the Issuers in writing by such
Holder expressly for use in any Registration Statement, any Prospectus and any
Issuer FWP.

 

(c)           If any suit, action, proceeding
(including any governmental or regulatory investigation), claim or demand shall
be brought or asserted against any Person in respect of which indemnification
may be sought pursuant to either paragraph (a) or (b) above, such
Person (the “Indemnified Person”) shall promptly notify the Person
against whom such indemnification may be sought (the “Indemnifying Person”)
in writing; provided that the failure to notify the Indemnifying
Person shall not relieve it from any liability that it may have under this Section 5
except to the extent that it has been materially prejudiced (through the forfeiture
of substantive rights or defenses) by such failure; and provided, further,
that the failure to notify the Indemnifying Person shall not relieve it from
any liability that it may have to an Indemnified Person otherwise than under
this Section 5.  If any such
proceeding shall be brought or asserted against an Indemnified Person and it
shall have notified the Indemnifying Person thereof, the Indemnifying Person
shall retain counsel reasonably satisfactory to the Indemnified Person to
represent the Indemnified Person 

 

15

 

and any others entitled
to indemnification pursuant to this Section 5 that the Indemnifying Person
may designate in such proceeding and shall pay the fees and expenses of such
counsel related to such proceeding, as incurred.  In any such proceeding, any Indemnified
Person shall have the right to retain its own counsel, but the fees and
expenses of such counsel shall be at the expense of such Indemnified Person
unless (i) the Indemnifying Person and the Indemnified Person shall have
mutually agreed to the contrary; (ii) the Indemnifying Person has failed
within a reasonable time to retain counsel reasonably satisfactory to the
Indemnified Person; (iii) the Indemnified Person shall have reasonably
concluded that there may be legal defenses available to it that are different
from or in addition to those available to the Indemnifying Person; or (iv) the
named parties in any such proceeding (including any impleaded parties) include
both the Indemnifying Person and the Indemnified Person and representation of
both parties by the same counsel would be inappropriate due to actual or
potential differing interests between them. 
It is understood and agreed that the Indemnifying Person shall not, in connection
with any proceeding or related proceeding in the same jurisdiction, be liable
for the fees and expenses of more than one separate firm (in addition to any
local counsel) for all Indemnified Persons, and that all such fees and expenses
shall be reimbursed as they are incurred. 
Any such separate firm (x) for any Initial Purchaser, its
affiliates, directors and officers and any control Persons of such Initial
Purchaser shall be designated in writing by J.P. Morgan Securities Inc., (y) for
any Holder, its directors and officers and any control Persons of such Holder
shall be designated in writing by the Majority Holders and (z) in all
other cases shall be designated in writing by the Issuers.  The Indemnifying Person shall not be liable
for any settlement of any proceeding effected without its written consent, but
if settled with such consent or if there be a final judgment for the plaintiff,
the Indemnifying Person agrees to indemnify each Indemnified Person from and
against any loss or liability by reason of such settlement or judgment.  Notwithstanding the foregoing sentence, if at
any time an Indemnified Person shall have requested that an Indemnifying Person
reimburse the Indemnified Person for fees and expenses of counsel as
contemplated by this paragraph, the Indemnifying Person shall be liable for any
settlement of any proceeding effected without its written consent if (i) such
settlement is entered into more than 30 days after receipt by the Indemnifying
Person of such request and (ii) the Indemnifying Person shall not have
reimbursed the Indemnified Person in accordance with such request prior to the
date of such settlement.  No Indemnifying
Person shall, without the written consent of the Indemnified Person, effect any
settlement of any pending or threatened proceeding in respect of which any
Indemnified Person is or could have been a party and indemnification could have
been sought hereunder by such Indemnified Person, unless such settlement (A) includes
an unconditional release of such Indemnified Person, in form and substance
reasonably satisfactory to such Indemnified Person, from all liability on
claims that are the subject matter of such proceeding and (B) does not
include any statement as to or any admission of fault, culpability or a failure
to act by or on behalf of any Indemnified Person.

 

(d)           If the indemnification provided for
in paragraphs (a) and (b) above is unavailable to an Indemnified
Person or insufficient in respect of any losses, claims, damages or liabilities
referred to therein, then each Indemnifying Person under such paragraph, in
lieu of indemnifying such Indemnified Person thereunder, shall contribute 

 

16

 

to the amount paid or
payable by such Indemnified Person as a result of such losses, claims, damages
or liabilities (i) in such proportion as is appropriate to reflect the
relative benefits received by the Issuers and the Guarantors from the offering
of the Securities and the Exchange Securities, on the one hand, and by the
Holders from receiving Securities or Exchange Securities registered under the
Securities Act, on the other hand, or (ii) if the allocation provided by
clause (i) is not permitted by applicable law, in such proportion as is
appropriate to reflect not only the relative benefits referred to in clause (i) but
also the relative fault of the Issuers and the Guarantors on the one hand and
the Holders on the other in connection with the statements or omissions that
resulted in such losses, claims, damages or liabilities, as well as any other
relevant equitable considerations.  The
relative fault of the Issuers and the Guarantors on the one hand and the
Holders on the other shall be determined by reference to, among other things,
whether the untrue or alleged untrue statement of a material fact or the
omission or alleged omission to state a material fact relates to information
supplied by the Issuers and the Guarantors or by the Holders, and the parties’
relative intent, knowledge, access to information and opportunity to correct or
prevent such statement or omission.

 

(e)           The Issuers, the Guarantors and the
Holders agree that it would not be just and equitable if contribution pursuant
to this Section 5 were determined by pro  rata allocation
(even if the Holders were treated as one entity for such purpose) or by any
other method of allocation that does not take account of the equitable
considerations referred to in paragraph (d) above.  The amount paid or payable by an Indemnified
Person as a result of the losses, claims, damages and liabilities referred to
in paragraph (d) above shall be deemed to include, subject to the
limitations set forth above, any legal or other expenses incurred by such
Indemnified Person in connection with any such action or claim.  Notwithstanding the provisions of this Section 5,
in no event shall a Holder be required to contribute any amount in excess of
the amount by which the total price at
which the Securities or Exchange Securities sold by such Holder exceeds
the amount of any damages that such Holder has otherwise been required to pay
by reason of such untrue or alleged untrue statement or omission or alleged
omission.  No Person guilty of fraudulent
misrepresentation (within the meaning of Section 11(f) of the
Securities Act) shall be entitled to contribution from any Person who was not
guilty of such fraudulent misrepresentation.

 

(f)            The remedies provided for in this Section 5
are not exclusive and shall not limit any rights or remedies that may otherwise
be available to any Indemnified Person at law or in equity.

 

(g)           The indemnity and contribution
provisions contained in this Section 5 shall remain operative and in full
force and effect regardless of (i) any termination of this Agreement, (ii) any
investigation made by or on behalf of the Initial Purchasers or any Holder or
any Person controlling any Initial Purchaser or any Holder, or by or on behalf
of the Issuers or the Guarantors or the officers or directors of or any Person
controlling the Issuers or the Guarantors, (iii) acceptance of any of the
Exchange Securities and (iv) any sale of Registrable Securities pursuant
to a Shelf Registration Statement.

 

17

 

6.             General.

 

(a)           No Inconsistent
Agreements.   The Issuers and the Guarantors represent,
warrant and agree that (i) the rights granted to the Holders hereunder do
not in any way conflict with and are not inconsistent with the rights granted
to the holders of any other outstanding securities issued or guaranteed by
either of the Issuers or any Guarantor under any other agreement and (ii) neither
the Issuers nor any Guarantor has entered into, or on or after the date of this
Agreement will enter into, any agreement that is inconsistent with the rights
granted to the Holders of Registrable Securities in this Agreement or otherwise
conflicts with the provisions hereof.

 

(b)           Amendments and
Waivers.   The provisions of this Agreement, including
the provisions of this sentence, may not be amended, modified or supplemented,
and waivers or consents to departures from the provisions hereof may not be
given unless the Issuers and the Guarantors have obtained the written consent
of Holders of at least a majority in aggregate principal amount of the
outstanding Registrable Securities affected by such amendment, modification,
supplement, waiver or consent; provided that no amendment, modification,
supplement, waiver or consent to any departure from the provisions of Section 5
hereof shall be effective as against any Holder of Registrable Securities unless
consented to in writing by such Holder. 
Any amendments, modifications, supplements, waivers or consents pursuant
to this Section 6(b) shall be by a writing executed by each of the
parties hereto.

 

(c)           Notices.  All notices and other communications provided
for or permitted hereunder shall be made in writing by hand-delivery,
registered first-class mail, telecopier, or any courier guaranteeing overnight
delivery (i) if to a Holder, at the most current address given by such
Holder to the Issuers by means of a notice given in accordance with the
provisions of this Section 6(c), which address initially is, with respect
to the Initial Purchasers, the address set forth in the Purchase Agreement; (ii) if
to the Issuers and the Guarantors, initially at the Issuers’ address set forth
in the Purchase Agreement and thereafter at such other address, notice of which
is given in accordance with the provisions of this Section 6(c); and (iii) to
such other persons at their respective addresses as provided in the Purchase
Agreement and thereafter at such other address, notice of which is given in
accordance with the provisions of this Section 6(c).  All such notices and communications shall be
deemed to have been duly given: at the time delivered by hand, if personally delivered;
five Business Days after being deposited in the mail, postage prepaid, if
mailed; when receipt is acknowledged, if telecopied; and on the next Business
Day if timely delivered to an air courier guaranteeing overnight delivery.  Copies of all such notices, demands or other
communications shall be concurrently delivered by the Person giving the same to
the Trustee, at the address specified in the Indenture.

 

(d)           Successors and Assigns. This
Agreement shall inure to the benefit of and be binding upon the successors,
assigns and transferees of each of the parties, including, without limitation
and without the need for an express assignment, subsequent Holders; provided
that nothing herein shall be deemed to permit any assignment, transfer or other

 

18

 

disposition of
Registrable Securities in violation of the terms of the Purchase Agreement or
the Indenture.  If any transferee of any
Holder shall acquire Registrable Securities in any manner, whether by operation
of law or otherwise, such Registrable Securities shall be held subject to all
the terms of this Agreement, and by taking and holding such Registrable
Securities such Person shall be conclusively deemed to have agreed to be bound
by and to perform all of the terms and provisions of this Agreement and such
Person shall be entitled to receive the benefits hereof.  The Initial Purchasers (in their capacity as
Initial Purchasers) shall have no liability or obligation to the Issuers or the
Guarantors with respect to any failure by a Holder to comply with, or any
breach by any Holder of, any of the obligations of such Holder under this
Agreement.

 

(e)           Third Party Beneficiaries.  Each Holder shall be a third party
beneficiary to the agreements made between the Issuers and the Guarantors, on
the one hand, and the Initial Purchasers, on the other hand, and shall have the
right to enforce such agreements directly to the extent it deems such
enforcement necessary or advisable to protect its rights or the rights of other
Holders hereunder.

 

(f)            Counterparts.
This Agreement may be executed in any number of counterparts and by the parties
hereto in separate counterparts, each of which when so executed shall be deemed
to be an original and all of which taken together shall constitute one and the
same agreement.

 

(g)           Headings.  The headings in this Agreement are
for convenience of reference only, are not a part of this Agreement and shall
not limit or otherwise affect the meaning hereof.

 

(h)           Governing Law.  This Agreement shall be governed
by and construed in accordance with the laws of the State of New York.

 

(j)            Miscellaneous.  This Agreement contains the entire agreement
between the parties relating to the subject matter hereof and supersedes all
oral statements and prior writings with respect thereto.  If any term, provision, covenant or
restriction contained in this Agreement is held by a court of competent
jurisdiction to be invalid, void or unenforceable or against public policy, the
remainder of the terms, provisions, covenants and restrictions contained herein
shall remain in full force and effect and shall in no way be affected, impaired
or invalidated.  The Issuers, the
Guarantors and the Initial Purchasers shall endeavor in good faith negotiations
to replace the invalid, void or unenforceable provisions with valid provisions
the economic effect of which comes as close as possible to that of the
invalid, void or unenforceable provisions.

 

19

 

IN
WITNESS WHEREOF, the parties have executed this Agreement as of the date first
written above.

 

Issuers:

 

	
  MARKWEST
  ENERGY PARTNERS, L.P.

  
	
   

  
	
  By:

  	
  MARKWEST
  ENERGY GP, L.L.C.,

  
	
   

  	
  its
  general partner

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By:

  	
  /s/
  ANDREW L. SCHROEDER

  	
   

  
	
   

  	
  Name:
  Andrew L. Schroeder

  
	
   

  	
  Title:
  Vice
  President Finance, Treasurer and Assistant Secretary

  
	
   

  
	
  MARKWEST ENERGY FINANCE CORPORATION

  
	
   

  
	
  By:

  	
  /s/
  ANDREW L. SCHROEDER

  	
   

  
	
  Name:
  Andrew L. Schroeder

  
	
  Title:
  Vice
  President Finance, Treasurer and Assistant Secretary

  
					

 

Signature Page to Registration Rights Agreement

 

 

Guarantors:

 

	
   

  	
   

  
	
   

  	
  MARKWEST HYDROCARBON,
  INC.

  
	
   

  	
   

  
	
   

  	
  By: 

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L. Schroeder

  
	
   

  	
  Title: 

  	
  Vice President Finance,
  Treasurer and 

  Assistant Secretary

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  MARKWEST ENERGY GP,
  L.L.C.

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By:

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L. Schroeder

  
	
   

  	
  Title:

  	
  Vice President Finance,
  Treasurer and 

  Assistant Secretary

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  MASON PIPELINE LIMITED
  LIABILITY COMPANY

  
	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST HYDROCARBON,
  INC.,

  
	
   

  	
   

  	
   

  	
  its Sole Member

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L. Schroeder

  
	
   

  	
  Title:

  	
  Vice President Finance,
  Treasurer and

  Assistant Secretary

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  MARKWEST ENERGY
  OPERATING COMPANY, L.L.C.

  
	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  PARTNERS, L.P.,

  
	
   

  	
   

  	
   

  	
  its Managing Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY GP,
  L.L.C.,

  
	
   

  	
   

  	
   

  	
  its General Partner

  
	
   

  	
   

  	
   

  
	
   

  	
  By:

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L. Schroeder

  
	
   

  	
  Title:

  	
  Vice President Finance,
  Treasurer and

  Assistant Secretary

  

 

Signature Page to Registration Rights Agreement

 

 

	
   

  	
  BASIN PIPELINE L.L.C.

  
	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MarkWest Energy
  Operating Company, L.L.C.,

  
	
   

  	
   

  	
   

  	
  its Sole Member
  and Manager

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  PARTNERS, L.P.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  GP, L.L.C., 

  
	
   

  	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By:

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L.
  Schroeder

  
	
   

  	
  Title:

  	
  Vice President
  Finance, Treasurer and 

  Assistant Secretary

  
	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  
	
   

  	
  MARKWEST ENERGY
  APPALACHIA, L.L.C.

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MarkWest Energy
  Operating Company, L.L.C.,

  
	
   

  	
   

  	
   

  	
  its Sole Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  PARTNERS, L.P.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  GP, L.L.C., 

  
	
   

  	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By: 

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L.
  Schroeder

  
	
   

  	
  Title:

  	
  Vice President
  Finance, Treasurer and 

  Assistant Secretary

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  MARKWEST ENERGY EAST
  TEXAS GAS COMPANY, L.L.C.

  
	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MarkWest Energy
  Operating Company, L.L.C.,

  
	
   

  	
   

  	
   

  	
  its Sole Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  PARTNERS, L.P.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  GP, L.L.C., 

  
	
   

  	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By: 

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L.
  Schroeder

  
	
   

  	
  Title:

  	
  Vice President
  Finance, Treasurer and 

  Assistant Secretary

  

 

Signature Page to Registration Rights Agreement

 

 

	
   

  	
  MARKWEST BLACKHAWK,
  L.L.C. 

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MarkWest Energy
  Operating Company, L.L.C.,

  
	
   

  	
   

  	
   

  	
  its Sole Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  PARTNERS, L.P.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  GP, L.L.C., 

  
	
   

  	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  
	
   

  	
  By: 

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L.
  Schroeder

  
	
   

  	
  Title:

  	
  Vice President
  Finance, Treasurer and 

  Assistant Secretary

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  MARKWEST GAS SERVICES,
  L.L.C.

  
	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MarkWest Energy
  Operating Company, L.L.C.,

  
	
   

  	
   

  	
   

  	
  its Sole Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  PARTNERS, L.P.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  GP, L.L.C., 

  
	
   

  	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By: 

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L.
  Schroeder

  
	
   

  	
  Title:

  	
  Vice President
  Finance, Treasurer and 

  Assistant Secretary

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  MARKWEST JAVELINA
  COMPANY, L.L.C. 

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MarkWest Energy
  Operating Company, L.L.C.,

  
	
   

  	
   

  	
   

  	
  its Sole Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  PARTNERS, L.P.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  GP, L.L.C., 

  
	
   

  	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By: 

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L.
  Schroeder

  
	
   

  	
  Title:

  	
  Vice President
  Finance, Treasurer and 

  Assistant Secretary

  

 

Signature Page to Registration Rights Agreement

 

 

	
   

  	
  MARKWEST
  JAVELINA PIPELINE COMPANY, L.L.C.

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MarkWest Energy
  Operating Company, L.L.C.,

  
	
   

  	
   

  	
   

  	
  its Sole Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  PARTNERS, L.P.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  GP, L.L.C., 

  
	
   

  	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  
	
   

  	
  By: 

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L.
  Schroeder

  
	
   

  	
  Title:

  	
  Vice President
  Finance, Treasurer and 

  Assistant Secretary

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  MARKWEST LIBERTY
  GAS GATHERING, L.L.C.

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MarkWest Energy
  Operating Company, L.L.C.,

  
	
   

  	
   

  	
   

  	
  its Sole Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  PARTNERS, L.P.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  GP, L.L.C., 

  
	
   

  	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  
	
   

  	
  By: 

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L.
  Schroeder

  
	
   

  	
  Title:

  	
  Vice President
  Finance, Treasurer and 

  Assistant Secretary

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  MARKWEST
  MICHIGAN PIPELINE COMPANY, L.L.C.

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MarkWest Energy
  Operating Company, L.L.C.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  PARTNERS, L.P.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  GP, L.L.C., 

  
	
   

  	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By: 

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L.
  Schroeder

  
	
   

  	
  Title:

  	
  Vice President
  Finance, Treasurer and 

  Assistant Secretary

  

 

Signature Page to Registration Rights Agreement

 

 

	
   

  	
  MARKWEST NEW
  MEXICO, L.L.C.

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MarkWest Energy
  Operating Company, L.L.C.,

  
	
   

  	
   

  	
   

  	
  its Sole Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  PARTNERS, L.P.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  GP, L.L.C., 

  
	
   

  	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By: 

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L.
  Schroeder

  
	
   

  	
  Title:

  	
  Vice President
  Finance, Treasurer and 

  Assistant Secretary

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  MARKWEST
  PINNACLE, L.L.C.

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MarkWest Energy
  Operating Company, L.L.C.,

  
	
   

  	
   

  	
   

  	
  its Sole Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  PARTNERS, L.P.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  GP, L.L.C., 

  
	
   

  	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By: 

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L.
  Schroeder

  
	
   

  	
  Title:

  	
  Vice President
  Finance, Treasurer and 

  Assistant Secretary

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  MARKWEST
  PIONEER, L.L.C.

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MarkWest Energy
  Operating Company, L.L.C.,

  
	
   

  	
   

  	
   

  	
  its Sole Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  PARTNERS, L.P.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  GP, L.L.C., 

  
	
   

  	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By: 

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L.
  Schroeder

  
	
   

  	
  Title:

  	
  Vice President
  Finance, Treasurer and 

  Assistant Secretary

  

 

Signature Page to Registration Rights Agreement

 

 

	
   

  	
  MARKWEST
  PIPELINE COMPANY, L.L.C.

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MarkWest Energy
  Operating Company, L.L.C.,

  
	
   

  	
   

  	
   

  	
  its Sole Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  PARTNERS, L.P.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  GP, L.L.C., 

  
	
   

  	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By: 

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L.
  Schroeder

  
	
   

  	
  Title:

  	
  Vice President
  Finance, Treasurer and 

  Assistant Secretary

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  MARKWEST PNG
  UTILITY, L.L.C.

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MarkWest Energy
  Operating Company, L.L.C.,

  
	
   

  	
   

  	
   

  	
  its Sole Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  PARTNERS, L.P.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  GP, L.L.C., 

  
	
   

  	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By: 

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L.
  Schroeder

  
	
   

  	
  Title:

  	
  Vice President
  Finance, Treasurer and 

  Assistant Secretary

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  MARKWEST POWER
  TEX, L.L.C.

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MarkWest Energy
  Operating Company, L.L.C.,

  
	
   

  	
   

  	
   

  	
  its Sole Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  PARTNERS, L.P., 

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  GP, L.L.C., 

  
	
   

  	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By: 

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L.
  Schroeder

  
	
   

  	
  Title:

  	
  Vice President
  Finance, Treasurer and 

  Assistant Secretary

  

 

Signature Page to Registration Rights Agreement

 

 

	
   

  	
  MARKWEST TEXAS
  PNG UTILITY, L.L.C.

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MarkWest Energy
  Operating Company, L.L.C.,  

  
	
   

  	
   

  	
   

  	
  its Sole Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  PARTNERS, L.P.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  GP, L.L.C., 

  
	
   

  	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By: 

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L.
  Schroeder

  
	
   

  	
  Title:

  	
  Vice President
  Finance, Treasurer and 

  Assistant Secretary

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  MARKWEST
  OKLAHOMA GAS COMPANY, L.L.C.

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MarkWest Energy
  Operating Company, L.L.C.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  PARTNERS, L.P.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  GP, L.L.C., 

  
	
   

  	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By: 

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L.
  Schroeder

  
	
   

  	
  Title:

  	
  Vice President
  Finance, Treasurer and 

  Assistant Secretary

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  WEST SHORE
  PROCESSING COMPANY, L.L.C.

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MarkWest Energy
  Operating Company, L.L.C.,

  
	
   

  	
   

  	
   

  	
  its Sole Member
  and Manager

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  PARTNERS, L.P.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  GP, L.L.C., 

  
	
   

  	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By: 

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L.
  Schroeder

  
	
   

  	
  Title:

  	
  Vice President
  Finance, Treasurer and 

  Assistant Secretary

  

 

Signature Page to Registration Rights Agreement

 

 

	
   

  	
  MATREX, L.L.C.

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  Basin Pipeline L.L.C.,

  
	
   

  	
   

  	
   

  	
  its Sole Member
  and Manager

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MarkWest Energy
  Operating Company, L.L.C.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  PARTNERS, L.P.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY GP,
  L.L.C., 

  
	
   

  	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By: 

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L.
  Schroeder

  
	
   

  	
  Title:

  	
  Vice President
  Finance, Treasurer and 

  Assistant Secretary

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  MARKWEST
  MARKETING, L.L.C.

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  OPERATING

  COMPANY, L.L.C.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  PARTNERS, L.P.,

  
	
   

  	
   

  	
   

  	
  its Managing
  Member

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
  By:

  	
  MARKWEST ENERGY
  GP, L.L.C., 

  
	
   

  	
   

  	
   

  	
  its General
  Partner

  
	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By: 

  	
  /s/
  ANDREW L. SCHROEDER

  
	
   

  	
  Name:

  	
  Andrew L.
  Schroeder

  
	
   

  	
  Title:

  	
  Vice President Finance,
  Treasurer and 

  Assistant Secretary

  

 

Signature Page to Registration Rights Agreement

 

 

Confirmed and accepted as
of the date first above written:

 

J.P.
MORGAN SECURITIES INC.

RBC
CAPITAL MARKETS CORPORATION

WACHOVIA
CAPITAL MARKETS, LLC

BANC
OF AMERICA SECURITIES LLC

CREDIT
SUISSE SECURITIES (USA) LLC

DEUTSCHE
BANK SECURITIES INC.

FORTIS
SECURITIES LLC

SUNTRUST
ROBINSON HUMPHREY, INC.

 

By:  J.P. MORGAN SECURITIES INC.

 

	
  By:

  	
  /s/ ADAM BERNARD

  	
   

  
	
   

  	
  Name: Adam
  Bernard

  
	
   

  	
  Title: Executive
  DirectorExhibit 10.1

 

	
  

  	
   

  	
  KPMG LLP

  
	
   

  	
   

  	
  Suite 3100

  717
  North Harwood Street

  Dallas, TX
  75201-6585

  

 

May 1,
2008

 

Securities and Exchange Commission

Washington,
D.C. 20549

 

Ladies
and Gentlemen:

 

We are currently principal accountants for Zale
Corporation and, under the date of October 1, 2007, we reported on the
consolidated financial statements of Zale Corporation as of and for the years
ended July 31, 2007 and 2006 and the effectiveness of internal control over financial
reporting as of July 31, 2007. On May 1, 2008, we were notified that Zale
Corporation engaged Ernst & Young LLP as its principal accountant for the year ending July 31,
2008 and that the auditor-client relationship with KPMG LLP will cease upon
completion of the review of Zale Corporation’s interim financial information as
of and for the three-month and nine-month periods ended April 30, 2008. We
have read Zale Corporation’s statements included
under Item 4.01 of its Form 8-K dated May 1, 2008, and we agree
with such statements, except that we are not in a position to agree or
disagree with Zale Corporation’s statement that the change was approved by the
audit committee of the board of directors and we are not in a position to agree
or disagree with Zale Corporation’s
statement that Ernst & Young LLP were not engaged regarding the
application of accounting principles
to a specified transaction or the type of audit opinion that might be rendered
on Zale Corporation’s consolidated financial statements.

 

Very
truly yours,

 

KPMG LLP

 

KPMG LLP, a U.S. limited liability
partnership, is the U.S.

member firm of KPMG International, a Swiss
cooperative.

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