REGISTRATION RIGHTS AGREEMENT


Dated:         February ___, 2001

Company:       NPC Holdings, Inc. (the "Company")

Guarantor:     Vulcan Minerals & Energy, Inc. ("Vulcan")

Investors:     The  following   Investors  ("Investors")  hold   or  shall  hold
               Registrable Securities:

               (i)  The Vulcan  Investors (as defined  below);  and

               (ii) Pacific Management Services, Inc. (the "Pacific Investors").

     WHEREAS,  certain  shareholders  of Vulcan (the  "Vulcan  Investors")  have
agreed to exchange  their shares of common  stock of Vulcan,  par value $.01 per
share (the  "Vulcan  Shares"),  for shares of the Common  Stock  pursuant  to an
Agreement and Plan of Reorganization, by and between Vulcan and the Company (the
"Reorganization"); and

     WHEREAS,  the Pacific Investors have acquired shares of the Common Stock in
the Reorganization; and

     WHEREAS,  the Company has agreed to register the shares of the Common Stock
acquired pursuant to the Reorganization, (the "Registrable Securities"); and

     WHEREAS the Guarantor,  which has been or will be acquired  pursuant to the
Reorganization,  is  guaranteeing  the  performance  of the  Company  under this
Registration Rights Agreement (the "Agreement").

     NOW, THEREFORE,  the Company and the Investors hereby covenant and agree as
follows:

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

     "Commission"  shall mean the  Securities  and Exchange  Commission,  or any
other federal agency at the time administering the Securities Act.

     "Common  Stock"  shall mean the  Common  Stock,  $0.001  par value,  of the
Company, as constituted as of the date of this Agreement.

     "Exchange Act" shall mean the Securities  Exchange Act of 1934, as amended,
or any similar federal statute,  and the rules and regulations of the Commission
thereunder, all as the same shall be in effect at the time.

     "Register,"  "registered"  and  "registration"  shall  mean a  registration
effected by  preparing  and filing a  registration  statement or  statements  or
similar  documents in compliance  with the Securities Act and the declaration or
ordering of effectiveness  of the  registration  statement (as defined below) or
other document by the Commission.


     "Requisite   Period"  shall  mean,   with  respect  to  a  firm  commitment
underwritten  public offering,  the period  commencing on the1 effective date of
the registration statement and ending on the date each underwriter has completed
the  distribution  of all  securities  purchased by it, and, with respect to any
other  registration,  the  period  commencing  on  the  effective  date  of  the
registration  statement  and ending on the earlier of the date on which the sale
of all  Registrable  Securities  covered thereby is completed and 180 days after
such effective date.

     "Securities Act" shall mean the Securities Act of 1933, as amended,  or any
similar  federal  statue,  and  the  rules  and  regulations  of the  Commission
thereunder, all as the same shall be in effect at the time.

     1. Registration.

     1.1 Registration Statement.  Unless not permissible under applicable law or
policy of the Commission,  upon  notification  from (i) a representative  of the
holders  of Vulcan  Investors  (the  "Vulcan  Representative")  that the  Vulcan
Investors  intend to offer for  public  sale any of the  Common  Stock that they
hold,  and/or (ii) the Pacific  Investors that the Pacific  Investors  intend to
offer for public sale any of the Common Stock that they hold,  the Company shall
file a registration  statement as soon as practicable but in no event later than
180  days  after  the date  hereof  covering  the  Registrable  Securities.  The
obligation  of the  Company  under  this  Section  1.1 shall be  limited  to one
registration  statement  and  amendments  thereto,  provided  said  registration
statement is approved by the Commission.

     1.2 Incidental Registration.  The Investors shall have the right to include
the Registrable Securities as part of any other registration of securities filed
by the Company (other than in connection with a transaction contemplated by Rule
145(a) promulgated under the Securities Act or pursuant to Forms S-4 or S-8). In
the  event of such a  proposed  registration,  the  Company  shall  furnish  the
Investors holding outstanding  Registrable  Securities with not less than thirty
(30) days' written  notice  thereof prior to the proposed date of filing of such
registration statement.  Such notice to Investors shall continue to be given for
each  registration  statement filed by the Company until such time as all of the
Registrable  Securities have been sold by the Investors.  The Investors  holding
the  Registrable  Securities  shall exercise the incidental  rights provided for
herein by giving written  notice,  within twenty (20) days of the receipt of the
Company's  notice of its intention to file a registration  statement.  Upon such
exercise,  the Company will use its reasonable  efforts to cause the Registrable
Securities as to which registration has been requested,  subject to any cutbacks
imposed by the Company's  managing  underwriting (if any), to be included in the
securities  to be  covered  by such  registration  statement  to be filed by the
Company,  all to the  extent  and  under the  conditions  such  registration  is
permitted by the Securities  Act.  Notwithstanding  anything to the contrary set
forth herein, the Company may withdraw any registration statement referred to in
this  Section 1.2 which it  initially  proposed  to file in its sole  discretion
without  thereby  incurring  any liability to the  Investors.  The Company shall
cause any registration  statement filed pursuant to the above incidental  rights
to remain effective for the Requisite Period.


     2. Registration Procedures.

     2.1 If and  whenever  the Company is required by the  provisions  hereof to
effect the registration of any Registrable  Securities under the Securities Act,
the Company will, as expeditiously as possible:

     (a) prepare and file with the  Commission  a  registration  statement  with
respect to such  securities,  and,  with respect to the  registration  statement
required to be filed pursuant to Section 1.1 hereof,  use its reasonable efforts
to cause the registration  statement to become effective not later than 180 days
from the date hereof and to remain effective for the Requisite Period;

     (b)  prepare  and  file  with  the  Commission   such   amendments  to  the
registration  statement and  supplements  to the  prospectus  used in connection
therewith as may be necessary to keep the registration  statement  effective for
the Requisite  Period and comply with the  provisions of the Securities Act with
respect  to  the  disposition  of  all  Registrable  Securities  covered  by the
registration statement in accordance with the intended method of disposition set
forth in the registration statement for such period;

     (c) furnish to each Investor  selling  Registrable  Securities  and to each
underwriter  such  number  of  copies  of the  registration  statement  and  the
prospectus  included  therein  (including each  preliminary  prospectus) as such
persons  reasonably may request in order to facilitate the intended  disposition
of the Registrable Securities covered by the registration statement;

     (d) use its reasonable  efforts (i) to register or qualify the  Registrable
Securities  covered by the registration  statement under the securities or "blue
sky" laws of such jurisdictions as the Investor selling  Registrable  Securities
or, in the case of an underwritten  public  offering,  the managing  underwriter
reasonably shall request,  (ii) to prepare and file in those  jurisdictions such
amendments (including post effective amendments) and supplements,  and take such
other  actions,   as  may  be  necessary  to  maintain  such   registration  and
qualification in effect at all times for the period of distribution contemplated
thereby,  and (iii) to take such further action as may be necessary or advisable
to enable the disposition of the Registrable  Securities in such  jurisdictions,
provided, that the Company shall not for any such purpose be required to qualify
generally  to transact  business as a foreign  corporation  in any  jurisdiction
where it is not so qualified or to consent to general  service of process in any
such jurisdiction;

     (e) immediately  notify each Investor  selling  Registrable  Securities and
each underwriter under the registration statement, at any time when a prospectus
relating  thereto is required to be delivered  under the Securities  Act, of the
happening  of any event of which the Company has  knowledge as a result of which
the  prospectus  contained  in the  registration  statement,  as then in effect,
includes any untrue  statement  of a material  fact or omits to state a material
fact required to be stated therein or necessary to make the  statements  therein
not misleading in light of the circumstances then existing and promptly amend or
supplement the  registration  statement to correct any such untrue  statement or
omission;


     (f) notify each Investor selling Registrable  Securities of the issuance by
the  Commission  of  any  stop  order   suspending  the   effectiveness  of  the
registration statement or the initiation of any proceedings for that purpose and
make every  reasonable  effort to prevent the issuance of any stop order and, if
any stop order is issued, to obtain the lifting thereof at the earliest possible
time;

     (g)  permit a single  firm of  counsel  designated  as  selling  Investors'
counsel by the  Investors  holding a majority  in  interest  of the  Registrable
Securities  being  registered  to  review  the  registration  statement  and all
amendments  and  supplements  thereto for a  reasonable  period of time prior to
their filing (provided,  however, that in no event shall the Company be required
to reimburse legal fees for the review of the registration statement pursuant to
this  Section  2.1(g)) and the Company  shall not file any document in a form to
which such counsel reasonably objects;

     (h)  make  generally   available  to  its  security   holders  as  soon  as
practicable,  but not later than 90 days  after the close of the period  covered
thereby,  an earnings  statement (in form  complying with the provisions of Rule
158 under the  Securities  Act) covering a 12-month  period  beginning not later
than the first day of the Company's next fiscal quarter  following the effective
date of the registration statement;

     (i) if the  offering  is an  underwritten  offering,  enter  into a written
agreement with the managing  underwriter  selected in the manner herein provided
in such form and  containing  such  provisions as are usual and customary in the
securities  business  for  such an  arrangement  between  such  underwriter  and
companies of the  Company's  size and  investment  stature,  including,  without
limitation, customary indemnification and contribution provisions;

     (j) if the  offering  is an  underwritten  offering,  at the request of any
Investor selling Registrable  Securities,  use its reasonable efforts to furnish
to such Investor on the date that  Registrable  Securities  are delivered to the
underwriters  for sale pursuant to such  registration:  (i) a copy of an opinion
dated such date of counsel  representing  the Company  for the  purposes of such
registration,  addressed to the underwriters,  and (ii) a copy of a letter dated
such date from the  independent  public  accountants  retained  by the  Company,
addressed to the underwriters;

     (k) make  available for  inspection by each  Investor  selling  Registrable
Securities  and  any  attorney,  accountant  or  other  agent  retained  by such
Investor,  all financial and other records,  pertinent  corporate  documents and
properties  of the Company as shall be  reasonably  necessary  to enable them to
exercise their due diligence  responsibility,  and cause the Company's officers,
directors and employees to supply all  information  reasonably  requested by any
such Investor, attorney, accountant or agent in connection with the registration
statement; provided that records which the Company determines, in good faith, to
be confidential and which it notifies the Investors are  confidential  shall not
be  disclosed  by the  Investors  unless (i) the  disclosure  of such records is
necessary  to avoid or correct a  misstatement  or omission in the  registration
statement or (ii) the release of such records is ordered  pursuant to a subpoena
or other order from a court of competent jurisdiction;  provided,  further, each
holder  of  Registrable  Securities  agrees  that it will,  upon  learning  that
disclosure of such records is sought in a court of competent jurisdiction,  give
notice to the  Company  and allow the  Company,  at its  expense,  to  undertake
appropriate action and to prevent disclosure of the records deemed confidential;
and

     (l) take all other reasonable actions necessary to expedite and
facilitate the registration of the Registrable Securities pursuant to the
registration statement.


     2.2 In  connection  with  the  registration  hereunder,  Investors  selling
Registrable  Securities will furnish to the Company in writing such  information
and  documentation  with respect to themselves and the proposed  distribution by
them as reasonably shall be necessary in order to assure compliance with federal
and applicable state securities laws.

     2.3 If the registration pursuant to this Agreement is in connection with an
underwritten  public  offering by the  Company,  Investors  selling  Registrable
Securities  hereby (a) agree to enter into a written agreement with the managing
underwriter  selected by the Company in such form and containing such provisions
as are customary in the securities business for such an arrangement between such
underwriter  and companies of the Company's  size and  investment  stature,  (b)
agree to provide such  information  and execute such documents as may reasonably
be  required  in  connection  with  such  registration,  (d)  agree  to sell the
Registrable  Securities on the basis provided in any underwriting  arrangements,
and (e) agree to complete  and execute all  questionnaires,  powers of attorney,
indemnities,  underwriting  agreements  and other  documents  required under the
terms  of  such  underwriting  arrangements,  which  arrangements  shall  not be
inconsistent  herewith;  and the Pacific  Investors  hereby  appoint  Michael L.
Labertew,  and the Vulcan  Investors  hereby  appoint John N. Ehrman,  to act as
their  respective  agents to negotiate the terms of any restriction on the right
of such Pacific  Investors or Vulcan  Investors,  as  applicable,  to sell their
Registrable  Securities  which shall be imposed by the managing  underwriter for
such  offering;  provided,  however,  that  Investors  holding a majority of the
Registrable Securities to be registered shall approve any terms so negotiated.

     3.  Expenses.  All expenses  incurred by the Company in complying with this
Agreement,  including,  without  limitation,  all  registration and filing fees,
printing  expenses,  fees and  disbursements  of counsel and independent  public
accountants for the Company, fees and expenses (including counsel fees) incurred
in connection  with complying with state  securities or "blue sky" laws, fees of
the National  Association of Securities  Dealers,  Inc., fees of transfer agents
and  registrars  and fees and  disbursements  of one counsel  for the  Investors
selling Registrable Securities (subject to the limitation in Section 2.1(g), but
excluding  any  Selling  Expenses,  are  called  "Registration   Expenses."  All
underwriting  discounts  and  selling  commissions  applicable  to the  sale  of
Registrable Securities are called "Selling Expenses."

     3.1 The Company will pay all  Registration  Expenses in connection with the
registration statements filed hereunder,  and the Selling Expenses in connection
with each registration  statement shall be borne by the participating  Investors
selling  Registrable  Securities  in  proportion  to the  number of  Registrable
Securities sold by each or as they may otherwise agree.

     4. Indemnification and Contribution.  (a) In the event of a registration of
any of the Registrable Securities under the Securities Act pursuant to the terms
of this  Agreement,  the Company will  indemnify  and hold  harmless and pay and
reimburse,  each Investor selling such Registrable  Securities  thereunder,  and
each other person,  if any, who controls such Investor within the meaning of the
Securities Act,  against any losses,  claims,  damages or liabilities,  joint or
several,  to which such Investor or controlling  person may become subject under
the  Securities  Act or otherwise,  insofar as such losses,  claims,  damages or
liabilities  (or actions in respect  thereof) arise out of or are based upon any
untrue  statement or alleged untrue  statement of any material fact contained in
the  registration   statement  under  which  such  Registrable  Securities  were
registered   under  the  Securities  Act  pursuant  hereto  or  any  preliminary
prospectus or final prospectus contained therein, or any amendment or supplement
thereof,  or arise out of or are based upon the omission or alleged  omission to
state therein a material fact required to be stated therein or necessary to make
the statements therein not misleading,  or any violation or alleged violation of
the Securities  Act or any state  securities or blue sky laws and will reimburse
each such  Investor  and  controlling  person  for any  legal or other  expenses
reasonably  incurred by them in connection with  investigating  or defending any
such loss, claim, damage,  liability or action;  provided, that the Company will
not be liable in any such case if and to the extent  that any such loss,  claim,
damage or  liability  (or action in respect  thereof)  arises out of or is based
upon the Company's  reliance on an untrue  statement or alleged untrue statement
or omission or alleged omission so made in conformity with information furnished
by any such Investor or any such controlling person (whether or not the Investor
or  controlling  person  asserting  the claims for  indemnification)  in writing
specifically for use in the registration statement or prospectus.


     (b) In the event of a  registration  of any of the  Registrable  Securities
under the  Securities Act pursuant  hereto,  each Investor  selling  Registrable
Securities  thereunder,  severally  and not  jointly,  will  indemnify  and hold
harmless the Company,  each person,  if any, who controls the Company within the
meaning  of the  Securities  Act,  each  officer  of the  Company  who signs the
registration  statement  and each  director of the  Company  against all losses,
claims,  damages or liabilities,  joint or several, to which the Company or such
officer,  director or controlling person may become subject under the Securities
Act or otherwise,  insofar as such losses,  claims,  damages or liabilities  (or
actions in respect  thereof) arise out of or are based upon any untrue statement
or alleged untrue  statement of any material fact contained in the  registration
statement under which such  Registrable  Securities  were  registered  under the
Securities Act pursuant hereto or any preliminary prospectus or final prospectus
contained therein,  or any amendment or supplement  thereof,  or arise out of or
are based upon the omission or alleged omission to state therein a material fact
required to be stated  therein or necessary to make the  statements  therein not
misleading,  and will reimburse the Company and each such officer,  director and
controlling person for any legal or other expenses  reasonably  incurred by them
in connection  with  investigating  or defending any such loss,  claim,  damage,
liability or action,  provided,  that such Investor will be liable  hereunder in
any such case if and only to the  extent  that any such loss,  claim,  damage or
liability  (or  action in  respect  thereof)  arises  out of or is based upon an
untrue  statement or alleged  untrue  statement or omission or alleged  omission
made in reliance upon and in conformity with information furnished in writing to
the Company by such Investor specifically for use in the registration  statement
or prospectus, and provided, that the liability of each Investor hereunder shall
be  limited  to the  proceeds  received  by  such  Investor  from  the  sale  of
Registrable  Securities covered by the registration  statement.  Notwithstanding
the  foregoing,  the indemnity  provided in this Section 4(b) shall not apply to
amounts paid in settlement of any such loss, claim, damage, liability or expense
if such settlement is effected without the consent of such indemnified party.

     (c) Promptly after receipt by an indemnified  party  hereunder of notice of
the  commencement  of any action,  such  indemnified  party shall, if a claim in
respect thereof is to be made against an indemnifying  party  hereunder,  notify
the  indemnifying  party in writing  thereof,  but the omission so to notify the
indemnifying  party shall not relieve it from any liability which it may have to
such indemnified party other than under this Section 4 and shall only relieve it
from any  liability  which  it may have to such  indemnified  party  under  this
Section 4 if and to the extent the indemnifying  party is materially  prejudiced
by such  omission.  In case  any  such  action  shall  be  brought  against  any
indemnified party and it shall notify the indemnifying party of the commencement
thereof,  the indemnifying party shall be entitled to participate in and, to the
extent it shall wish, to assume and  undertake the defense  thereof with counsel
reasonably  satisfactory to such indemnified  party,  and, after notice from the
indemnifying  party to such  indemnified  party of its election so to assume and
undertake the defense  thereof,  the  indemnifying  party shall not be liable to
such indemnified party under this Section 4 for any legal expenses  subsequently
incurred by such indemnified  party in connection with the defense thereof other
than reasonable costs of investigation  and of liaison with counsel so selected,
provided, that if the defendants in any such action include both the indemnified
party and the indemnifying party and the indemnified party shall have reasonably
concluded  based upon written advice of his counsel that there may be reasonable
defenses  available  to it  which  are  different  from or  additional  to those
available to the  indemnifying  party,  or if the  interests of the  indemnified
party   reasonably  may  be  deemed  to  conflict  with  the  interests  of  the
indemnifying  party,  the  indemnified  party  shall  have the right to select a
separate  counsel and to assume such legal defenses and otherwise to participate
in the  defense of such  action,  with the  expenses  and fees of such  separate
counsel and other expenses related to such participation to be reimbursed by the
indemnifying  party  if  and  to the  extent  that  it is  determined  that  the
indemnified party is entitled to indemnification hereunder.


     (d) In  order to  provide  for just  and  equitable  contribution  to joint
liability  under the  Securities  Act in any case in which any Investor  selling
Registrable   Securities   exercising  rights  under  this  Agreement,   or  any
controlling  person  of any such  Investor,  makes a claim  for  indemnification
pursuant to this Section 4, and it is agreed by the indemnifying  party or it is
judicially  determined (by the entry of a final judgment or decree by a court of
competent jurisdiction and the expiration of time to appeal or the denial of the
last right of appeal)  that such  indemnification  may be enforced in such case,
contribution  under the  Securities  Act may be required on the part of any such
Investor   or  any  such   controlling   person  in   circumstances   for  which
indemnification  is provided  under this Section 4; then, and in each such case,
the Company and such Investor will contribute to the aggregate  losses,  claims,
damages or  liabilities to which they may be subject  (after  contribution  from
others) in such  proportion  so that each such Investor is  responsible  for the
portion  represented by the percentage that the aggregate  public offering price
of its Registrable Securities offered by the registration statement bears to the
aggregate  public offering price of all securities  offered by the  registration
statement,  and the Company is responsible for the remaining portion;  provided,
that, in any such case (A) no such  Investor will be required to contribute  any
amount in excess of the aggregate  public offering price of all such Registrable
Securities  offered by it pursuant  to the  registration  statement,  and (B) no
person or entity guilty of fraudulent  misrepresentation  (within the meaning of
Section 11(f) of the Securities Act) will be entitled to  contribution  from any
person or entity who was not guilty of such fraudulent misrepresentation.

     5.  Changes in Capital  Stock.  If, and as often as, there is any change in
the  capital  stock of the  Company  by way of a stock  split,  stock  dividend,
combination   or   reclassification,   or   through  a  merger,   consolidation,
reorganization  or  recapitalization,   or  by  any  other  means,   appropriate
adjustment  shall  be made in the  provisions  hereof  so that  the  rights  and
privileges granted hereby shall continue with respect to the capital stock as so
changed.

     6. Rule 144  Reporting.  With a view to making  available  the  benefits of
certain rules and regulations of the Commission which may at any time permit the
sale of the Registrable  Securities to the public without  registration,  at all
times after 90 days after any registration  statement covering a public offering
of  securities  of the  Company  under  the  Securities  Act shall  have  become
effective, the Company agrees to:

     6.1  make  and keep  public  information  available,  as  those  terms  are
understood and defined in Rule 144 under the Securities Act;


     6.2 file with the  Commission  in a timely  manner  all  reports  and other
documents required of the Company under the Securities Act and the Exchange Act;
and

     6.3 furnish to each Investor selling Registrable  Securities forthwith upon
request  a  written  statement  by the  Company  as to its  compliance  with the
reporting  requirements  of  such  Rule  144 and of the  Securities  Act and the
Exchange  Act,  a copy of the most  recent  annual  or  quarterly  report of the
Company,  and such other  reports and  documents so filed by the Company as such
Investor may reasonably  request in availing itself of any rule or regulation of
the Commission allowing such Investor to sell any Registrable Securities without
registration.

     7.  Representations and Warranties.  The Company represents and warrants to
the Investors as follows:

     (a) The  execution,  delivery  and  performance  of this  Agreement  by the
Company have been duly authorized by all requisite corporate action and will not
violate  any  provision  of law,  any  order of any  court or  other  agency  of
government,  the  Articles  of  Incorporation  or By-laws of the  Company or any
provision of any indenture,  agreement or other instrument to which it or any or
its  properties  or  assets is bound,  conflict  with,  result in a breach of or
constitute  (with due notice or lapse of time or both) a default  under any such
indenture, agreement or other instrument or result in the creation or imposition
of any lien,  charge or  encumbrance  of any nature  whatsoever  upon any of the
properties or assets of the Company or its subsidiaries; and

     (b) This  Agreement has been duly executed and delivered by the Company and
constitutes the legal, valid and binding obligation of the Company,  enforceable
in accordance with its terms.

     7.1 The Investors represent and warrant to the Company as follows:

     (a) The Investor:  (i) if a natural person represents that the Investor has
full power and  authority  to execute  and  deliver  this  Agreement;  (ii) if a
corporation,   partnership,   limited  liability   company,   limited  liability
partnership,   association,   joint   stock   company,   trust,   unincorporated
organization  or other  entity,  such  entity  has full power and  authority  to
execute and deliver this Agreement and the Agreement has been duly authorized by
all  requisite  entity  action,  and  (iii) if  executing  this  Agreement  in a
representative or fiduciary capacity, it has full power and authority to execute
and deliver  this  Agreement in such  capacity and on behalf of the  subscribing
individual,  ward, partnership,  trust, estate,  corporation,  limited liability
company, limited liability partnership, or other entity for whom the Investor is
executing this Agreement, and such individual, ward, partnership, trust, estate,
corporation,  limited liability company, limited liability partnership, or other
entity has full power and  authority to execute and deliver this  Agreement  and
the Agreement has been duly  authorized by all requisite  entity  action.  Where
applicable,  the execution,  delivery and performance of this Agreement has been
duly authorized by all requisite charter or other organizational action and will
not  violate any  provision  of law,  any order of any court or other  agency of
government,  the Articles of  Incorporation  or By-laws or other  organizational
document of the Investor or any provision of any  indenture,  agreement or other
instrument  to which it or any of its  properties  or assets is bound,  conflict
with,  result in a breach of or constitute  (with due notice or lapse of time or
both) a  default  under  any  such  indenture,  agreement  or  other  instrument
whatsoever  upon  any  of the  properties  or  assets  of  the  Investor  or its
subsidiaries.

     (b) This Agreement has been duly executed and delivered by the Investor and
constitutes the legal, valid and binding obligation of the Investor, enforceable
in accordance with its terms.


     8. Miscellaneous.

     (a) All  covenants  and  agreements  contained  in this  Agreement by or on
behalf of any of the parties  hereto  shall bind and inure to the benefit of the
respective  successors and permitted  assigns of the parties hereto,  whether so
expressed  or not.  No  party  hereto  shall  assign  all or any of its  rights,
benefits,  obligations  or  burdens  hereunder  to any other  person  (including
without  limitation any transferees of any Registrable  Securities)  without the
prior written consent of the other party, in its sole discretion.

     (b) All  notices,  requests,  consents and other  communications  hereunder
shall be in writing and shall be  delivered  in person,  mailed by  certified or
registered  mail,  return  receipt  requested,  or sent by  telecopier or telex,
addressed (i) if to the Company,  at 650 North Sam Houston Pkwy.  E., Suite 500,
Houston, Texas 77060, (ii) if to the Vulcan Investors,  to the attention of John
N. Ehrman at 650 North Sam Houston Pkwy. E., Suite 500, Houston, Texas 77060 and
(iii) if to any other  party  hereto,  at the  address  of such  party set forth
beneath such party's signature to this Agreement.

     (c) This  Agreement  shall be governed by and construed in accordance  with
the laws of the State of Texas  applicable  to contracts  entered into and to be
performed wholly within said State.

     (d) Any  judicial  proceeding  brought  against  any of the parties to this
Agreement on any dispute  arising out of this  Agreement  of any matter  related
hereto  shall be brought  exclusively  in the State or Federal  Courts in Texas,
and, by execution  and delivery of this  Agreement,  each of the parties  hereto
accepts for itself and himself the process in any such action or  proceeding  by
the mailing of copies of such  process to it, at its or his address as set forth
in Section  8(b) and  irrevocably  agrees to be bound by any  judgment  rendered
thereby in connection with this Agreement.  Each party hereto irrevocably waives
to the fullest  extent  permitted by law any objection  that it or he may now or
hereafter have to the laying of the venue of any judicial  proceeding brought in
such courts and any claim that any such judicial  proceeding has been brought in
an  inconvenient  forum.  The  foregoing  consent  to  the  sole  and  exclusive
jurisdiction in Texas shall not constitute general consent to service of process
in the State of Texas for any purpose  except as provided above and shall not be
deemed to confer rights on any person other than the respective  parties to this
Agreement.

     (e) The Company  and the  Investors  agree that the rights  created by this
Agreement are unique,  and that the loss of any such right is not susceptible to
monetary  quantification.  Consequently,  the  parties  agree that an action for
specific  performance  (including  for  temporary  and/or  permanent  injunctive
relief) of the obligations  created by this Agreement is a proper remedy for the
breach of the  provisions  of this  Agreement,  without the necessity of proving
actual damages.  If the parties hereto are forced to institute legal proceedings
to enforce their rights in accordance with the provisions of this Agreement, the
prevailing party shall be entitled to recover its reasonable expenses, including
attorneys' fees, in connection with any such action.


     (f) This Agreement may not be amended or modified without the prior written
consent of the Company and the holders of at least a majority of the Registrable
Securities.

     (g)  Failure  of any  party to  exercise  any right or  remedy  under  this
Agreement or otherwise,  or delay by a party in exercising such right or remedy,
shall not operate as a waiver thereof.  No waiver shall be effective  unless and
until it is in writing and signed by the party granting the waiver.

     (h) This  Agreement  may be executed in two or more  counterparts,  each of
which shall be deemed an original,  but all of which together  shall  constitute
one and the same instrument.

     (i) The Company shall not grant to any third party any registration  rights
more favorable than or inconsistent with any of those contained herein, or which
would  in any  way  adversely  affect  the  rights  of  holders  of  Registrable
Securities  hereunder,  so long as any of the  registration  rights  under  this
Agreement remains in effect.

     (j) If any provision of this Agreement shall be held to be illegal, invalid
or unenforceable,  such illegality,  invalidity or unenforceability shall attach
only to such  provision  and shall not in any manner  affect or render  illegal,
invalid  or  unenforceable  any  other  provision  of this  Agreement,  and this
Agreement shall be carried out as if any such illegal,  invalid or unenforceable
provision were not contained herein.

     IN WITNESS  WHEREOF,  the undersigned has executed this Agreement as of the
date first above written.

                                       NPC Holdings, Inc.


                                       By:
                                          ---------------------------------
                                          Vulcan Minerals & Energy, Inc.


                                       By:
                                          ---------------------------------


                                       Pacific Management Services, Inc.
                                       4685 South Highland Drive #202
                                       Salt Lake City, UT 84117



                                       By:
                                          ---------------------------------



                                       Vulcan Investors



                                       By:
                                          ---------------------------------
                                          John N. Ehrman, as their proxy