Exhibit 10.1
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NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

                                    AGREEMENT

This AGREEMENT dated as of the 31st day of March 1999 ("Effective Date")

BETWEEN:
                  PACIFIC  FIBER  LINK,  LLC,  a  Washington  limited  liability
                  company,  having a business  office in  Westminster  Colorado,
                  hereinafter referred to as "Developer";

AND:
                  PATHNET, INC., a Delaware corporation having a business office
                  in  Washington,  DC  hereinafter  referred  to as  "Purchaser"
                  (DEVELOPER  and Purchaser are referred to herein  individually
                  as a Party and collectively as "Parties");

         WHEREAS, DEVELOPER desires to design, engineer,  construct, install and
maintain  a [ * * * ] conduit  fiber  optic  telecommunications  system  between
Aurora,  Colorado and Chicago,  Illinois,  as more  particularly  identified  in
Exhibit A (the "Segments"); and

         WHEREAS,  Purchaser carries on business as a telecommunications carrier
and desires to purchase from DEVELOPER and DEVELOPER agrees to sell to Purchaser
[ * * * ] and [ * * * ] of the total number of fibers pulled through the Primary
Conduit (as defined herein),  and associated  improvements  within the [ * * * ]
conduit fiber optic telecommunication system being constructed by DEVELOPER;

         NOW THEREFORE THIS AGREEMENT,  witnesses that in  consideration  of the
mutual  covenants  herein  contained,  the receipt and  sufficiency  whereof are
hereby acknowledged, the Parties hereto agree as follows:

1.       DEFINITIONS

      In  this  Agreement,  unless  the  subject  matter  or  context  otherwise
requires:

     1.1  "Acceptance  Date" means the date that the  Purchaser has Accepted the
          Purchaser System hereof pursuant to Article 10.

     1.2  "Business Day" means a day other than a Saturday, Sunday or holiday.


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     1.3  "Cable" means the fiber optic cable and the fibers contained  therein,
          and associated splicing connections, splice boxes and vaults and other
          telecommunications and associated equipment to be installed as part of
          the Project.

     1.4  "Conduit"  when used herein as a defined  term means the conduit to be
          installed as part of the Project,  as more  particularly  described in
          Exhibit C.

     1.5  "Developer"  means  DEVELOPER,  which  shall  have  responsibility  to
          design, engineer,  construct,  install and maintain the Project as set
          forth in this Agreement and in the maintenance agreement.

     1.6  "Estimated Delivery Date" means the date set forth in Exhibit A hereto
          as such date may be extended as provided in this Agreement.

     1.7  "Force   Majeure"  means  in  relation  to  the   performance  of  any
          obligations under this Agreement, any cause, condition or event of any
          nature whatsoever which is beyond the reasonable  control of the Party
          responsible for such obligation which prevents in whole or in part the
          performance  by such Party of its  respective  obligations  including,
          without  limitation,   acts  of  war,   revolution,   riot,  sabotage,
          vandalism,  earthquakes,  and  other  acts of God,  local or  national
          emergencies, rail accidents, strikes, lockouts, work slowdowns and all
          other labor disputes,  whether lawful or unlawful, delays of unrelated
          third parties and governmental agencies in granting Underlying Rights,
          the adoption or  amendment  of  government  codes,  ordinances,  laws,
          rules,  regulations or restrictions,  including  without  limitation a
          material   reduction  in   available   track  time,   permitting   and
          construction  delays  in  the  System's  urban  locations  beyond  the
          reasonable  control of and arising without the negligence of the Party
          claiming a delay  resulting  therefrom and any other event (whether or
          not  of  the  kind  enumerated  in  this  Section  1.7)  which  is not
          reasonably  in the control of and was not caused by the  negligence or
          willful  misconduct of the Party  claiming  force  majeure,  and which
          materially  affects the ability of the Party claiming force majeure to
          timely fulfill its obligations hereunder.  Notwithstanding anything in
          the   preceding   sentences,   (i)  any   change  in  pricing  in  the
          telecommunications market or lack of financing shall not be considered
          events of Force  Majeure  and (ii) an event  shall be treated as Force
          Majeure  as set  forth  above  only  if the  delayed  Party  uses  its
          Reasonable Efforts to mitigate the situation and thereafter to resolve
          the delay as expeditiously as possible.

     1.8  "Franchise" means authority required under law by a Franchising
                Authority as a precondition to providing  telecommunications  or
                other services.

     1.9  "Franchising  Authority"  means  a  city,  county  or  other  unit  of
          government authorized by law to grant Franchises.

     1.10 "MW" or "Maintenance  Window" shall mean a prearranged  period of time
          reserved  for   performing   certain  work  on  the  System  that  may
          potentially affect traffic, as more fully described in Exhibit H.

     1.11 "Management Fee" shall have the meaning set forth in Section 11.2.2.


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NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

     1.12 "Material  Deviation"  shall mean a deviation in the general  route of
          the Purchaser  System (i) that modifies the System Route  architecture
          in a  manner  that  breaks  a  ring,  creates  a spur  or  breaks  the
          contiguous  nature of the Purchaser System; or (ii) that increases the
          route mileage by more than [ * * * ] or (iii) that modifies the System
          Route  through any city  identified in Exhibit A as being the location
          of a  Purchaser  POP  site in a manner  that  materially  changes  the
          proximity of such POP site to the System Route.

     1.13 "Non-Project Costs" means those costs which are expressly specified in
          Exhibit  B  under  the  heading  "Non-Project  Costs",  to be  paid by
          DEVELOPER out of the Management Fee.

     1.14 "Notice of  Completion"  has the meaning  provided  in Section  10.2.1
          hereof.

     1.15 "Notice of Non-Acceptance"  has the meaning provided in Section 10.2.2
          hereof.

     1.16 "Person"   includes   individuals,    limited   liability   companies,
          partnerships,  associations,  trusts, unincorporated organizations and
          corporations.

     1.17 "POP" shall mean the Purchaser's  point of presence at locations along
          the System route.

     1.18 "Primary  Conduit" is the first  conduit owned by DEVELOPER to contain
          dark  fiber in an amount  and of a type and  specifications  agreed to
          herein  by the  Parties,  of which [ * * * ] of the  total  number  of
          fibers pulled will be owned by Purchaser.

     1.19 "Prime  Rate" shall mean the prime rate of interest  published  by the
          Wall Street  Journal as the base rate on  corporate  loans posted by a
          substantial  percentage of the nation's  largest banks on the date any
          such  payment is due.  Unless  otherwise  provided in this  Agreement,
          interest  shall be compounded  annually in  determining  the amount of
          interest due.

     1.20 "Project"  means  all of the  Cables,  Conduits,  equipment  shelters,
          utility  connections and all  appurtenances  thereto  installed on the
          Underlying Rights between Aurora,  Colorado and Chicago,  Illinois, in
          connection  with  DEVELOPER's   engineering,   design,   installation,
          maintenance  and  construction  of the System.  The  Project  shall be
          constructed in Segments on a schedule to be agreed to by the Parties.

     1.21 "Project Budget" means the detailed, Segment by Segment budget for the
          Project agreed to by the Parties.

     1.21 "Project  Costs"  shall mean all costs which are incurred by DEVELOPER
          necessary  for  the  purpose  of  design,  engineering,  construction,
          installing and maintaining the



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NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

          Project,  including  but not limited to, the  Underlying  Rights Costs
          save and except the Non-Project Costs as set forth in Exhibit B.

     1.23 "Project Schedule" means the schedule of tasks and deadlines agreed to
          by the Parties to be attached as an exhibit hereto.

     1.24 "Project Specifications" means the engineering, design and operational
          specifications  set forth in  Exhibits  C, E and F for the  System and
          Purchaser System.

     1.25 "Purchase  Price"  means the total  purchase  price for the  Purchaser
          System as calculated pursuant to Article 11 and Exhibit B.

     1.26 "Purchaser  System"  means [ * * * ] and [ * * * ] of the total number
          of fibers pulled  through the Primary  Conduit,  and the right to use,
          install,  own, operate and dispose of and perform the rights set forth
          in the Marketing  Agreement  between the Parties dated on or about the
          date hereof (the "Marketing  Agreement") other auxiliary  improvements
          described  in the  Exhibits,  constructed,  engineered,  designed  and
          installed as part of the Project and being purchased by Purchaser, all
          of which fibers,  Conduit and auxiliary  improvements  comply with the
          Project  Specifications  or such  other  specifications  agreed  to by
          Purchaser.

     1.27 "Reasonable  Efforts" shall mean efforts  commercially  and reasonably
          designed  to achieve  the desired  results,  but shall not  obligate a
          Party to make unreimbursed  expenditures that are excessive in amount,
          in  light  of  the  circumstances  to  which  the  requirement  to use
          reasonable efforts applies.

     1.28 "Segment"  shall  mean that  portion  of the  Project  installed  on a
          section  of the right of way as  designated  in  Exhibit  A,  attached
          hereto and incorporated herein .

     1.29 "System" shall mean the fiber optic communication  system,  consisting
          of [ * * * ], Cables and all appurtenances thereto,  between such pair
          cities identified in Exhibit A.

     1.30 "Underlying Rights" means all deeds, leases, easements, rights of way,
          licenses, franchises, permits, authorizations,  consents and approvals
          (including without limitation,  any necessary local, state, federal or
          tribal  authorizations  and  environmental  permits) and other rights,
          titles  or  interests   as  are   necessary   for  the   construction,
          installation,  operation,  maintenance  or  repair of the  System  and
          Purchaser System.

     1.31 "Underlying  Rights Costs" means the total costs expended by DEVELOPER
          to obtain the Underlying Rights and any renewals thereof.

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     1.32 "Underlying  Rights   Requirements"   means  the  terms,   conditions,
          requirements,  restrictions, and/or limitations upon Purchaser's right
          to use or operate the Purchaser  System  imposed under the  Underlying
          Rights and the  associated  safety,  operational  and other  rules and
          regulations  imposed in connection  therewith or by applicable law. 

2.        HEADINGS

          The division of this  Agreement  into Articles and  Sections,  and the
          insertion of headings are for  convenience  of reference only and will
          not affect the construction or interpretation  of this Agreement.  The
          terms  "hereof",  "hereunder"  and similar  expressions  refer to this
          Agreement,  not to any  particular  Article,  Section or other portion
          hereof,  and include any  agreement  supplemental  hereto.  Unless the
          subject matter or content  otherwise  requires,  references  herein to
          Articles and Sections are to Articles and Sections of this  Agreement.

3.        EXTENDED MEANINGS

          In this  Agreement,  the  singular  shall  include the plural and vice
          versa and references to any gender include all genders.  

4.        ACCOUNTING PRINCIPLES

          Wherever in this  Agreement  reference is made to a calculation  to be
          made or an action to be taken in accordance  with  generally  accepted
          accounting  principles,  such  reference  will be  deemed to be to the
          generally accepted accounting principles from time to time approved by
          the Financial  Accounting  Standards Board, or any successor  thereof,
          applicable as of the date on which such  calculation or action is made
          or taken or required to be made or taken in accordance  with generally
          accepted accounting principles.

5.       CURRENCY

          All  references  to currency  herein are to lawful money of the United
          States of America.


6.       EXHIBITS

          The  following  are  the  Exhibits  attached  to and  incorporated  by
          reference herein:

               -        Exhibit A - Project and Purchaser System;
               -        Exhibit B - Payment Method and Non-Project Costs;
               -        Exhibit C - Construction Specifications and Drawings;
               -        Exhibit D - Fiber Cable Splicing Testing and Acceptance
                                    Procedures;
               -        Exhibit E - Fiber Optic Specifications
               -        Exhibit F - Specifications for Regeneration Facilities
               -        Exhibit G - As-Built Drawings Specifications;
               -        Exhibit H - Maintenance Specifications and Procedures;
               -        Exhibit I - Bill of Sale.

7.       DEVELOPER TO ENGINEER, DESIGN, INSTALL AND CONSTRUCT

     7.1  DEVELOPER shall engineer, design, install and construct the Project on
          behalf of DEVELOPER and Purchaser, by carrying out the Project and the
          Purchaser  System 

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          in  compliance  with  the  Project  Specifications  set  forth  in the
          Exhibits as they may be revised as agreed among the Parties in writing
          from  time  to  time,  and in  compliance  with  applicable  laws  and
          governmental and regulatory requirements as well as in compliance with
          all  applicable   Underlying  Rights  Requirements.   DEVELOPER  shall
          competitively bid all subcontracts and shall select the lowest bid for
          each  subcontract  (provided,  however,  that  DEVELOPER  shall not be
          required  to  select a  subcontractor  to  which  it has a  reasonable
          objection,  including  but not  limited to, the  subcontractor's  past
          performance,   availability,   reputation,   financial   strength  and
          construction   expertise),   and  Developer  shall  require  that  all
          subcontractors  use new  materials  only and  operate  at all times in
          accordance with prevailing  industry  standards with properly  trained
          personnel.  All  contractors  that are  affiliated  with PFL,  and any
          contractual  arrangements with such entities,  shall be subject to the
          prior approval of Purchaser,  which approval shall not be unreasonably
          withheld or delayed.  If Purchaser  does not give written  reasons for
          withholding  its approval  within seven (7) days of receipt of written
          notice from  DEVELOPER,  approval shall be deemed given.  All Conduits
          and fibers will be color-coded  in order to identify their  ownership.
          DEVELOPER shall coordinate with  governmental and regulatory  agencies
          the  construction  of  the  Project,  obtain  all  requisite  permits,
          licenses and authorizations required to engineer,  design, install and
          construct  the Project,  and prepare  monthly  summary  reports on the
          status and scheduling of the Project. DEVELOPER shall keep the Project
          free of debris  following  installation  and shall comply at all times
          with  all  applicable   environmental  and  health  and  safety  laws.
          DEVELOPER  shall ensure that any and all  construction  liens or other
          liens on the Project are promptly vacated.  DEVELOPER shall supply all
          vehicles,  tools,  equipment,  labor and  similar  items and  services
          necessary  for  DEVELOPER to perform and  complete  the  Project,  and
          DEVELOPER  shall be solely  responsible  for  maintaining the security
          thereof. Both Parties agree that the number of Conduits in the Project
          will not  increase  without  the prior  written  consent  of the other
          Party,  which consent shall not be unreasonably,  delayed or withheld,
          and may be conditioned on the Parties'  agreement on appropriate  cost
          and revenue  sharing  arrangements  for the additional  conduit(s) and
          restrictions  on the use and disposition of such  conduits(s).  In the
          event  either  Party has not  approved  the  increase in the number of
          Conduits within fifteen (15) days after receipt of written notice from
          the  other  Party,  the  withholding  Party  shall be  deemed  to have
          declined  to  participate  and  share  in  the  costs  of  adding  the
          additional  conduit(s)  to  the  System.  In  such  event,  the  Party
          proposing the inclusion of the additional  conduit(s) shall be free to
          complete the  transaction at its sole cost and expense and all revenue
          arising  from or  attributable  to such  additional  conduit(s)  shall
          remain the personal  property of that Party and such revenue shall not
          be shared  with the  declining  Party.  In  addition,  the  additional
          conduit(s) and the fiber contained therein shall not be subject to the
          Party's  Marketing  Agreement;   provided  however,   that  the  Party
          proposing the inclusion of the additional  conduit(s) may not populate
          the additional conduit(s),  or sell, lease, license, swap or otherwise
          dispose of the additional  conduit(s),  or permit any of the foregoing
          in any manner  whatsoever  until the  termination or expiration of the
          Party's Marketing Agreement.

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     7.2  DEVELOPER  shall  endeavor  to  convene   periodic   meetings  of  the
          representatives  of DEVELOPER  and Purchaser to review the progress of
          the work relating to the Project and Purchaser  System,  such meetings
          to be held at the  principal  office  of the  Project  (1333 W.  120th
          Avenue,  Westminster,  Colorado)  or at  such  other  place  as may be
          mutually  agreed upon between  DEVELOPER and  Purchaser.  Both Parties
          agree  that such  meetings  may be  convened  by means of a  telephone
          conference   or  any  other   communication   facility   whereby   all
          representatives  participating  in the meeting can hear each other and
          make themselves heard.

     7.3  DEVELOPER  shall on the  Acceptance  Date for each Segment  obtain all
          warranties and guarantees from material suppliers, equipment makers or
          contractors   for  such  Segment.   DEVELOPER  shall  cause  all  such
          warranties and guarantees attributable to the Purchaser's System to be
          assigned directly to Purchaser wherever legally permissible, and shall
          furnish to Purchaser written evidence of such assignment, or otherwise
          assist  Purchaser  in  enforcing  same.  Where the  assignment  is not
          legally permissible or would materially,  adversely affect DEVELOPER's
          retained  interest in the Project from time to time,  DEVELOPER  shall
          then hold in trust for the benefit of Purchaser  said  warranties  and
          guarantees.

     7.4  Either  Purchaser or DEVELOPER  may request a change to the System and
          Purchaser  System or the  Specifications  set forth in the Exhibits in
          writing.  If either Party makes such  request,  the  requesting  Party
          shall  accompany  such  request  with  a  detailed  statement  of  the
          additional  costs and savings,  if any,  within  fifteen (15) Business
          Days. Any additional  costs and/or savings  resulting from agreed upon
          changes will modify the Maximum Budget accordingly.

     7.5  Purchaser  shall at all times  have the right to observe  and  inspect
          DEVELOPER's performance of the Project.  Inspection or lack thereof by
          Purchaser shall not act as a waiver of any rights of Purchaser.

8.       DEVELOPER TO PROCURE UNDERLYING RIGHTS

     8.1  DEVELOPER  covenants  and  agrees  that it  shall  obtain  any and all
          Underlying Rights to the extent  reasonably  necessary in order to (i)
          permit  DEVELOPER  to  construct,  install,  maintain  and  convey  to
          Purchaser the Purchaser  System  hereunder,  (ii) permit  Purchaser to
          use,  own,  operate,  access  and  maintain  the  Purchaser  System as
          provided  and  permitted  hereunder  and as provided in the  Marketing
          Agreement,  and  (iii)  permit  Purchaser  to grant  sub-easements  or
          sub-licenses,  as the case may be, to third  parties all in accordance
          with the terms and conditions hereof,  subject to restrictions imposed
          by the grantor of the Underlying Rights, provided such restrictions do
          not  unreasonably  interfere  with  the  activities  described  in the
          preceding  clauses (i) through (iii).  In the event the grantor of the
          Underlying Rights does not permit DEVELOPER to grant  sub-easements or
          sub-licenses to third parties,  DEVELOPER  agrees that Purchaser shall
          have  the  right,  but  not  the  obligation,  to  participate  in the
          acquisition of such Underlying Rights.

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NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

     8.2  Subject to the consent of the party  granting the  Underlying  Rights,
          DEVELOPER  shall use  Reasonable  Efforts to provide  to  Purchaser  a
          non-disturbance  provision  during the term of such Underlying  Rights
          and any renewal  thereof,  to include the right of Purchaser to obtain
          notice of any default on the part of DEVELOPER and to permit Purchaser
          to cure,  on behalf of DEVELOPER,  any such default by DEVELOPER  and,
          thereafter,   to  continue  the  use  of  such  Underlying  Rights  in
          accordance with DEVELOPER's rights and interests thereunder;  provided
          that  DEVELOPER's  failure to obtain  such  notice and a right to cure
          shall not be considered a breach of this  Agreement by  DEVELOPER.  If
          Purchaser at any time cures such default by DEVELOPER, DEVELOPER shall
          reimburse  Purchaser  for  any  and  all  amounts  reasonably  paid by
          Purchaser promptly upon demand.

     8.3  DEVELOPER  shall use  Reasonable  Efforts to require  that the initial
          stated term of any  Underlying  Rights shall be for a period that does
          not expire in  accordance  with its  ordinary  terms  within [ * * * ]
          years of the Effective  Date.  If the initial  stated term of any such
          Underlying  Rights expires in accordance with its ordinary terms prior
          to [ * * * ] years after the Effective Date,  DEVELOPER shall exercise
          any renewal rights thereunder, or otherwise use its Reasonable Efforts
          to acquire such extensions,  additions  and/or  replacements as may be
          necessary  in order to cause the stated term  thereof to be  continued
          until a date that is not  earlier  than the [ * * * ] years  after the
          Effective  Date.  Purchaser shall pay DEVELOPER [ * * * ] of the total
          costs  incurred by DEVELOPER in renewing or replacing  the  Underlying
          Rights upon the  expiration or termination  thereof.  If, after use of
          Reasonable   Efforts   DEVELOPER  does  not  obtain  such  renewal  or
          extension,  nothing in this  Agreement  shall prevent  Purchaser  from
          seeking to obtain or  obtaining  any renewal or  extension of any such
          Underlying  Rights from the  grantor of such  Underlying  Rights,  and
          DEVELOPER shall pay Purchaser [ * * * ] of the total costs incurred by
          Purchaser  in  obtaining  any  such  renewal  or  extensions  thereof.
          Notwithstanding  the  foregoing,  DEVELOPER  will  obtain  Purchaser's
          prior,  written consent before agreeing to any Underlying  Rights that
          are for terms of less than [ * * * ] years,  or would not  permit  the
          rights and activities  described in Section 8.1 (i) through (iii).  In
          the  event  DEVELOPER  is  delayed  in  procuring  and  obtaining  any
          Underlying Rights as a result of Purchaser's failure to timely consent
          and approve the same,  which consent shall be deemed to be given if no
          written  objection is raised within ten (10) days of written notice of
          such  an  event  to  Purchaser,  DEVELOPER  shall  be  entitled  to an
          equitable extension of time in the Project Schedule and any applicable
          Segment Completion Date.

     8.4  Both DEVELOPER and Purchaser  further  covenant and agree with respect
          to  such  Underlying   Rights  to  observe  and  perform  its  duties,
          obligations and responsibilities under such Underlying Rights or under
          this  Agreement,  if the  failure  to  observe  and  perform  any such
          obligation or obligations  would permit the grantor of such Underlying
          Rights to terminate such Underlying Rights prior to

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NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.


          their stated  expiration  date,  would result in a material  amount of
          cost, loss, damage or expense, or would otherwise materially adversely
          impair or  affect  either  Party's  ability  to use the  System or the
          Purchaser System or exercise each Party's rights with respect thereto,
          as provided  and  permitted  hereunder.  Each Party  hereby  agrees to
          indemnify and hold the other Party harmless from and against any loss,
          cost,  damage or expense,  including  reasonable  attorneys'  fees and
          costs of suit,  resulting from the indemnifying Party's breach of this
          Section.

     8.5  Throughout the term of each such  Underlying  Rights,  DEVELOPER shall
          defend  and  protect  DEVELOPER's  rights in and  interests  under the
          Underlying Rights and Purchaser's right to use the Purchaser System as
          provided and permitted  hereunder  against  interfering  or infringing
          rights,  interests  or  claims  of  third  parties.   Purchaser  shall
          reimburse DEVELOPER for [ * * * ] of the total costs,  including legal
          and direct  administrative  costs of DEVELOPER  and of any third party
          costs incurred in defending and protecting the rights and interests of
          the Parties.

     8.6  Notwithstanding  anything to the contrary contained in this Article 8,
          so long as a Party shall have observed and  performed its  obligations
          with respect thereto,  upon the expiration,  termination or failure to
          renew or  extend  any  Underlying  Rights  necessary  in order for the
          Parties to use the System or any portion thereof, each Party shall not
          be liable to Purchaser for any direct, indirect, special,  incidental,
          punitive,  consequential or other damages including without limitation
          loss of profits or revenue,  cost of  capital,  cost of removal of the
          Purchaser  System,   or  claims  of  customers,   resulting  from  the
          expiration or termination of any Underlying Rights.

     8.7  DEVELOPER and  Purchaser  shall  designate  employees of each Party as
          members of a Project  team to  facilitate  and  coordinate  activities
          under this  Agreement.  In addition,  DEVELOPER  and  Purchaser  shall
          designate  one  or  more   individuals  from  the  Parties  as  onsite
          inspectors to monitor construction progress.

9.       SUBSTITUTIONS; RELOCATIONS

     9.1  If, after the Acceptance Date with respect to a Segment, (i) DEVELOPER
          is required by a Party with legal authority to so require  (including,
          without limitation,  a grantor of Underlying Rights if such relocation
          is not being  required as a result of  DEVELOPER's  failure to observe
          and  perform  its  obligations  under such  Underlying  Rights or this
          Agreement),  to  relocate  any  portion  of a Segment,  including  any
          condemnation or taking under the power of eminent domain of all or any
          portion  of a  Segment,  or (ii)  with  Purchaser's  concurrence  upon
          DEVELOPER's request,  DEVELOPER may relocate such Segment. In any such
          event,  (i) the route of any such  relocation  shall be subject to the
          good faith agreement  between DEVELOPER and Purchaser in such Segment,
          or in any other  Conduit or Cables  included  in the  System  which is
          affected  by such  relocation;  (ii)  Purchaser  shall  be kept  fully
          informed of all

                                       9


NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

          material  determinations  made by  DEVELOPER in  connection  with such
          relocation;  and (iii) the  portions of any  Segment  affected by such
          relocation shall be constructed in accordance with the  specifications
          and drawings set forth in this Agreement.  If such relocation  occurs,
          Purchaser shall reimburse  DEVELOPER for either [ * * * ] of the costs
          of such  relocation  attributable  to the  portion  of the  Segment so
          relocated  (reduced  by such  amount,  if any,  of the portion of such
          costs as are  reimbursed  to  DEVELOPER  by the Party  requiring  such
          relocation),  or an amount adjusted to reflect any additional Cable or
          facilities installed by either Party in excess of the original System.

     9.2  Purchaser  shall have the right to review and audit all costs incurred
          in  connection  with  such  relocation.  DEVELOPER  shall  deliver  to
          Purchaser  updated  As-built  drawings  with respect to the  relocated
          segment not later than ninety (90) days  following  the  completion of
          such relocation.

10.      ACCEPTANCE DATE

10.1      Scheduled Available Date
          ------------------------

          (i)  Time shall be of the essence with respect to  completion  of each
               Segment  of the  Project  by the dates  set forth in the  Project
               Schedule  agreed to by the Parties,  and the entire Project shall
               be  completed  on or  before [ * * * ] (the  "Project  Completion
               Date"),  as extended by Force Majeure events, or any extension of
               time expressly provided for in this Agreement.

          10.1.1    If the portion of the Project  from  Chicago,  Illinois to
                    Omaha,   Nebraska  is  not   Substantially   Completed   (as
                    hereinafter  defined) on or before [ * * * ] or that portion
                    of the Project from Omaha,  Nebraska to Aurora,  Colorado is
                    not  Substantially  Completed  on  or  before  [ * * * ] (as
                    extended by Force Majeure  events,  or any extension of time
                    expressly  provided  for under  this  Agreement),  DEVELOPER
                    shall  pay (or allow  Purchaser  to a setoff as the case may
                    be) to Purchaser by way of  liquidated  damages and not as a
                    penalty,  a pre-estimated  amount equal to [ * * * ] per day
                    for each day thereafter until the date on which that portion
                    of  the  Project  is  completed   or  deemed   completed  in
                    accordance  with Section 10.2;  provided  however,  that the
                    total  amount  of  liquidated   damages   payable  for  late
                    completion hereunder shall not exceed in the aggregate [ * *
                    * ] Purchaser may deduct or set-off from the Purchase  Price
                    any  liquidated  damages due  Purchaser  under this  Section
                    10.1.

          10.1.2    Assessment and payment of liquidated  damages  pursuant to
                    Section  10.1.1 shall be the maximum  liability of DEVELOPER
                    for monetary  damages in connection with any late completion
                    under this

                                       10


NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.


                    Agreement.

          10.1.3    The Project  Schedule  shall  contain  agreed upon Segment
                    Completion  Dates  as set  forth  in  Exhibit  A,  by  which
                    DEVELOPER will have completed certain  Segments.  Subject to
                    Force Majeure  events or any extensions of time provided for
                    under this  Agreement,  in the event that DEVELOPER fails to
                    complete the work required by a specific Segment  Completion
                    Date;   provided,   however,   that  such   failure  is  not
                    attributable  to  Purchaser  or its  contractors,  Purchaser
                    shall have the right to (i) require  DEVELOPER to provide an
                    accelerated  Project Schedule  demonstrating  that DEVELOPER
                    can complete the remaining Segments by the scheduled Segment
                    Completion  Dates, and the Project by the scheduled  Project
                    Completion  Date;  and (ii) require that  DEVELOPER  provide
                    reasonable additional assurances that DEVELOPER can complete
                    the Project on Schedule and on or under the approved Project
                    budget.  DEVELOPER's failure to satisfy four or more Segment
                    Completion  Dates  by more  than [ * * * ] days  each  shall
                    constitute a Default under this Agreement.

          10.1.4    In the event the cause of a work delay is  attributable to
                    Purchaser or its contractors,  Purchaser shall pay the costs
                    of implementing the accelerated  Project  Schedule,  and, to
                    the  extent  necessary,   adjust  the  appropriate   Segment
                    Completion   Dates,   with  the  delay  costs   incurred  by
                    DEVELOPER,   if  any,  to  be  reimbursed  by  Purchaser  in
                    connection therewith. 

                                       11


10.2      Title to the Purchaser System
           -----------------------------

          Upon Substantial Completion and full payment of the Purchase Price for
          each  Segment  of the  Purchaser  System to  DEVELOPER,  title to each
          Segment of the Purchaser System shall be fully vested in, transferred,
          and conveyed to Purchaser by a bill of sale, substantially in the form
          set forth in  Exhibit I, or without  further  action  upon an event of
          bankruptcy.  Notwithstanding  the  foregoing,  title  to all  work  in
          progress and all materials that  DEVELOPER  purchases or furnishes for
          the Purchaser  System as part of the Purchaser  System,  including but
          not limited to, Cable,  Conduit and facilities shall pass to Purchaser
          when such items have been paid for by Purchaser as provided in Exhibit
          B. DEVELOPER shall bear all risk of loss with respect to the Purchaser
          System until title is transferred;  provided,  however, that DEVELOPER
          shall not be liable to Purchaser  for any direct,  indirect,  special,
          incidental, punitive, consequential or other damages including without
          limitation  loss of profits or  revenue,  cost of capital or claims of
          customers,  resulting  from any loss to the  Purchaser  System  before
          title  is  transferred  and  conveyed  to  Purchaser,   provided  that
          DEVELOPER shall repair and restore any damage resulting from such loss
          at no cost to Purchaser.

          10.2.1    Following  Substantial  Completion  of each Segment of the
                    System, DEVELOPER shall provide a written notice ("Notice of
                    Completion").  Substantial  Completion shall mean completion
                    of a Segment in accordance  with the Project  Specifications
                    such that  Purchaser  may upon its receipt of title  operate
                    the  Segment  in  accordance  with  this  Agreement  and the
                    Marketing  Agreement,  except  for  non-material  punch-list
                    items that can  reasonably  be corrected  within thirty (30)
                    days. DEVELOPER shall promptly provide Purchaser with a copy
                    of all test results concerning a completed Segment.

          10.2.2    Purchaser  shall  have  fourteen  (14)  days from the day
                    Purchaser  receives  the Notice of  Completion  to determine
                    whether the completed  Segment is  constructed  according to
                    the Project  Specifications  (the "Acceptance  Period").  If
                    Purchaser   determines   that  the   Segment  is,  in  fact,
                    Substantially Complete, Purchaser shall Accept such Segment,
                    subject to such punch-list  items that Purchaser  identifies
                    in writing to DEVELOPER.  Unless  Purchaser  gives notice in
                    writing  to  DEVELOPER  that the  completed  Segment  is not
                    constructed according to the Project Specifications, clearly
                    identifying  the nature of the failure by cross reference to
                    such Project Specifications  (hereinafter referred to as the
                    "Notice of  Non-Acceptance"),  within  fourteen (14) days of
                    receiving the Notice of  Completion as aforesaid,  Purchaser
                    shall be deemed constructively to accept the Segment and the
                    Acceptance Date with respect thereto shall be deemed to have
                    occurred on the last day of the Acceptance  Period. The date
                    of such  acceptance  (or deemed  acceptance)  of the Segment
                    shall be the  "Acceptance  Date"  for such  Segment.  On the
                    

                                       12



                    Acceptance Date, and upon full payment of the Purchase Price
                    for each Segment of the Purchaser System to DEVELOPER, title
                    to each Segment of the Purchaser System shall be transferred
                    according to this Section.

          10.2.3    If Purchaser gives a Notice of  Non-Acceptance,  DEVELOPER
                    shall remedy the defect and cause the  completed  Segment to
                    be constructed according to the Project Specifications.  The
                    Parties  shall  work  together  in good  faith  to  promptly
                    identify those items that require correction.

          10.2.4    Upon notice from DEVELOPER that the conditions  identified
                    in  the  Notice  of  Non-Acceptance   have  been  corrected,
                    Purchaser  shall have an  additional  fourteen  (14) days to
                    determine  whether  the  completed  Segment  is  constructed
                    according to the Project Specifications.

          10.2.5    In the event  DEVELOPER  fails to remedy  the  defect  and
                    cause the completed  Segment to be constructed  according to
                    the  Project  Specifications,   and  which  failure  remains
                    unresolved  at the  end  of the  fourteen  (14)  day  period
                    referred to in Section 10.2.4, the Parties shall submit such
                    dispute  to  be  resolved  in  accordance  with  Article  35
                    (Dispute Resolution) hereof.

          10.2.6    Prior to the Acceptance Date and following the delivery of
                    the Notice of  Completion,  Purchaser  shall be  entitled to
                    inspect  the System  for the  purpose  of  conducting  tests
                    without any additional expense to DEVELOPER.

10.3      Simultaneously,  with the payment by Purchaser  of the total  Purchase
          Price in connection  with a Segment,  DEVELOPER shall take any and all
          steps necessary to convey the Segment to Purchaser.

11.      PURCHASE PRICE/PAYMENT

    11.1  The Purchaser  hereby  agrees to pay DEVELOPER the Purchase  Price set
          forth herein for the purchase of:

          11.1.1    the Purchaser System; and

          11.1.2    the occupancy  right of Purchaser's  fibers in DEVELOPER's
                    conduit (i.e. the Primary Conduit); and

          11.1.3    the right to use the regeneration  facilities as described
                    in Article 20 and Exhibit A; and

          11.1.4    the right to use all appurtenances constructed pursuant to
                    this Agreement and relating to Purchaser System;

                                       13


NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

          11.1.5    the right to use,  access and occupy the Purchaser  System
                    in  accordance   with  the  terms  and  conditions  of  this
                    Agreement

          11.1.6    the right to exercise the rights and  privileges set forth
                    in the Marketing Agreement.

    11.2  The Purchase Price shall be the aggregate sum of the following:

          11.2.1    [ * * * ] of the Project Costs; and

          11.2.2    a Management Fee equal to [ * * * ] of the Purchase Price.
                    In no event to  exceed [ * * * ] of the  payment  cap as set
                    forth in Section  11.4(a).  When  calculating the Management
                    Fee,  the  portion  of  Project  Costs  attributable  to  an
                    increase  in the  number of fibers  in the  Primary  Conduit
                    beyond [ * * * ] fibers,  if any,  shall not be  considered;
                    and

          11.2.3    [ * * * ] of  the  total  actual  costs  for  the  design,
                    engineering and construction of any additional work, if any,
                    in excess of those  described in this  Agreement  and at the
                    written request of Purchaser, plus [ * * * ] for supervision
                    and  management,   provided  that  DEVELOPER  shall  not  be
                    required   to  perform  any   additional   work  that  would
                    materially  delay the Project or extend beyond the scheduled
                    Project  Completion Date without the mutual agreement of the
                    Parties.

          11.2.4    the taxes set forth in Section 11.9.

    11.3  The Purchase  Price shall be paid by the Purchaser to DEVELOPER in the
          manner and at the time as set forth in Exhibit B. The  Maximum  Budget
          (as set forth below) and the Purchase Price set forth herein, is based
          on an assumed  route  mileage of one  thousand one hundred one (1,101)
          miles for the System (the "Assumed Mileage").  In the event the actual
          route mileage is not equal to the Assumed  Mileage upon  completion of
          the Project,  the Maximum  Budget shall be adjusted based on [ * * * ]
          per route  mile,  multiplied  by the actual  route  miles  constructed
          (based on the cost of purchasing of a [ * * * ]).

    11.4  The Purchaser and DEVELOPER  hereby agree that the maximum  budget for
          the Project  (excluding  the  Management  Fee) is [ * * * ] subject to
          modification  due to agreed upon changes,  and pursuant to Section 7.4
          (the "Maximum Budget").  In the event the actual Project Costs are not
          equal to the  Maximum  Budget  upon  completion  of the  Project,  the
          Purchase Price shall be adjusted as follows:

                                       14


NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

          (a)  Subject to cost  overruns  due to events of Force  Majeure as set
               forth in Section 1.7, if the actual Project Costs upon completion
               of the Project exceed the Maximum  Budget,  Purchaser's  share of
               Project Costs, as set forth in Section 11.2.1, shall be capped at
               [ * * * ] of the Maximum Budget.

          (b)  If the actual  Project  Costs upon  completion of the Project are
               less than the Maximum  Budget,  each Party shall pay [ * * * ] of
               the actual  Project Costs as set forth herein.  In addition,  the
               DEVELOPER  shall be entitled to an increase in the Management Fee
               equal to [ * * * ] of the amount by which the final Project Costs
               upon completion are less than [ * * * ] of the Maximum Budget.

          (c)  If the actual Project Costs upon  completion of the Project equal
               the Maximum Budget,  as set forth above,  Purchaser and DEVELOPER
               shall  each  pay  [ * *  * ]  of  the  actual  Project  Costs  as
               contemplated in Section 11 of this Agreement.

    11.5  Each month  DEVELOPER  shall  provide to the  Purchaser an  up-to-date
          costs report of the Project on a percentage  of  completion  basis and
          forecast  reports  prepared  in  accordance  with  generally  accepted
          accounting  principles.  In the event DEVELOPER's  revised estimate of
          the total costs of the Project exceeds the initial estimated budget or
          any revised estimate of timing that materially varies from the Project
          Schedule, DEVELOPER shall notify the Purchaser immediately and provide
          the documentation necessary to substantiate the increased costs and/or
          change in timing.

    11.6  A complete set of books of account and records of the  Project,  truly
          and accurately  documenting  the Project Costs of the Project shall be
          maintained at  DEVELOPER's  office.  The  Purchaser or its  designated
          representatives  shall have access to and right to  inspect,  copy and
          audit such books and  records  during  the  business  hours with prior
          notice reasonably given to DEVELOPER.  In the event that the Purchaser
          disputes  any amount,  the  Purchaser  shall  provide  written  notice
          describing  in  detail  the basis for any such  dispute  and  promptly
          forward  such notice to  DEVELOPER.  To the extent  DEVELOPER  and the
          Purchaser are otherwise  unable to resolve such dispute  through their
          respective  operating and administrative  personnel within thirty (30)
          days after  notice  thereof  from the  Purchaser,  the matter shall be
          submitted for dispute resolution as provided in Article 35 herein.

    11.7  In addition to the Purchase Price,  the Purchaser  further agrees that
          it shall pay [ * * * ] of the total  maintenance costs pursuant to the
          provisions  of the  maintenance  agreement  to be entered into between
          DEVELOPER and the Purchaser.

                                       15


NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

    11.8  Subject  to the  provisions  of Article  13, in the event that  either
          Party fails to make any payment  under this  Agreement  when due, such
          amounts shall accrue interest,  from the date five (5) days after such
          payment is due until paid, compounded monthly, at an annual rate equal
          to the  Prime  Rate,  plus [ * * * ];  provided  that  if the  highest
          percentage  rate allowed by law is lower than such rate, then the rate
          shall be such highest rate allowed by law. In addition to the interest
          payment set forth in this Section 11.8, if the Purchaser fails to make
          timely  payments  when  due,  the  Project  Completion  Date  for  the
          Purchaser System shall be  automatically  extended by a number of days
          equal to the number of days that elapse from the date such  payment is
          due until paid.

    11.9  The  Purchaser  shall  be  responsible  for and pay all  sales  and/or
          purchase  taxes  levied  or  assessed  by any  governmental  agency in
          connection  with the  purchase  by  Purchaser  from  DEVELOPER  of the
          Purchaser System.

    11.10 Mutual  Guaranties.  Each  Party  agrees to  provide  the  other  with
          financial assurances,  in form and substance  commercially  reasonable
          and  acceptable  to the other Party on or before sixty (60) days after
          the date  hereof  to  guarantee  its  payment  obligations,  including
          without  limitation,  the payment of liquidated damages in the case of
          DEVELOPER, pursuant to the terms and conditions of this Agreement.

12.        DEFAULT

  12.1    The following  events shall be deemed to be events of default (each, a
          "Default") under this Agreement:

          12.1.1    Excluding  any  occurrence  caused  by any  of the  Force
                    Majeure  events as set forth in Section 1.7,  either Party's
                    violation  of any  applicable  laws,  statutes,  ordinances,
                    codes,  Underlying  Rights  Requirements,   or  other  legal
                    requirements which substantially affects the progress of the
                    Project,  or  endangers  the  completion  of a Segment,  the
                    Project or the Purchaser System, if such violation(s) is not
                    remedied  within ten (10)  Business  Days  after  receipt of
                    notice thereof from the  non-defaulting  Party,  or, if such
                    default cannot with reasonable  diligence be remedied within
                    such period, a Party's failure to remedy such default within
                    an  additional  period  reasonably  required  to remedy such
                    default if a longer  period is  permitted  at law  (provided
                    that the  defaulting  Party  promptly  commences  the remedy
                    within  such ten  (10) day  period  and  diligently  pursues
                    appropriate   efforts   to   remedy   such   default   until
                    completion);

          12.1.2    Purchaser's  failure to make any payment of money required
                    under this Agreement  within thirty (30) Business Days after
                    receipt of written notice 


                                       16


                    thereof from DEVELOPER;

          12.1.3    Subject  to  DEVELOPER's  right to  temporarily  withhold
                    payment to a  subcontractor  or supplier  due to a bona fide
                    dispute between DEVELOPER and such third party,  DEVELOPER's
                    failure to timely make any payment due under this Agreement,
                    or in connection  with the Project,  whether to Purchaser or
                    to third parties,  which failure is not remedied  within ten
                    (10)  Business  Days after  receipt by  DEVELOPER of written
                    notice  of such  failure  or,  if  such  default  cannot  be
                    remedied  within such  period,  DEVELOPER's  failure to make
                    such payment within an additional  sixty (60) days (provided
                    that DEVELOPER promptly commences the remedy within such ten
                    (10) day period and diligently pursues  appropriate  efforts
                    to  remedy  such  default  until   completion   within  said
                    additional sixty (60) day period);

          12.1.4    DEVELOPER's  failure to make any payment  required  under
                    this  Agreement  within  thirty  (30)  Business  Days  after
                    receipt of written notice thereof from Purchaser;

          12.1.5    Except as otherwise  caused by an event of Force  Majeure,
                    if  DEVELOPER  abandons the Project and  DEVELOPER  does not
                    resume  construction  of the  Project  within  ten (10) days
                    after receipt of written notice from Purchaser;

          12.1.6    Either Party becomes insolvent, liquidates, is adjudicated
                    as  bankrupt,   makes  an  assignment  for  the  benefit  of
                    creditors,  invokes any  provision  of law for the relief of
                    debtors or initiates any proceeding  seeking protection from
                    its creditors.

          12.1.7    A material  breach of this Agreement by either Party which
                    is not cured  within  thirty  (30)  days  after  receipt  of
                    written  notice  from the  non-breaching  Party,  or, if the
                    default cannot be remedied within such period, the breaching
                    Party's  failure to remedy such default within an additional
                    sixty (60) days (provided that the breaching  Party promptly
                    commences  the remedy within such thirty (30) day period and
                    diligently  pursues   appropriate  efforts  to  remedy  such
                    default  until  completion).  The  Segment  from  Chicago to
                    Omaha,  or  the  Segment  from  Omaha  to  Aurora,   is  not
                    substantially  completed  within  sixty  (60)  days from the
                    scheduled  completion date for such Segment,  as extended by
                    Force Majeure  events,  or any  extension of time  expressly
                    provided  for  under  this  Agreement,  as  applicable;  

13.        TERMINATION

  13.1    Purchaser's  Default.  In the event of a Default by Purchaser pursuant
          to Article 12 hereof that is not cured  within any  applicable  notice
          and cure period, DEVELOPER shall, without prejudice to any other right
          or remedy  available at law or in equity,  have the right to elect any
          or all of the  remedies set forth below.  In any case,  (i) 

                                       17


          DEVELOPER will be entitled to full payment for services provided up to
          the time of said Default pursuant to this Agreement; (ii) any Segments
          that have been  conveyed to Purchaser  shall be retained by Purchaser,
          and  the  Marketing  Agreement  shall  remain  in  effect  as to  such
          Segments.

          A.   DEVELOPER may temporarily suspend  construction of the Project or
               the Purchaser  System,  which suspension shall delay the affected
               Segment  Completion Date and the Project  Completion Date for the
               suspension period; or

          B.   DEVELOPER  may  require   additional   security  to  ensure  that
               Purchaser  retains  the  financial  and other  ability  to timely
               fulfill its obligations under this Agreement. Such security shall
               be as  determined  by DEVELOPER in its sole  discretion,  and may
               include, without limitation, additional financial guarantees by a
               Purchaser affiliate or other third party; escrowed funds; letters
               of credit; or a payment bond.

          C.   DEVELOPER  may keep this  Agreement  in full  force  and  effect,
               complete  any or all of the  Segments  that  have  not  yet  been
               Accepted  and paid for by  Purchaser,  and  retain  all title and
               other rights in such Segments, including the right to all revenue
               earned  from  such  Segments   under  the  Marketing   Agreement.
               DEVELOPER shall notify Purchaser,  in writing, when such Segments
               have been Substantially  Completed,  and Purchaser shall have the
               right to purchase such Segments by paying within thirty (30) days
               thereafter (i) all sums owing  hereunder in connection  with such
               Segments;  and (ii) any loss, cost, damage or expense incurred by
               DEVELOPER  and  arising  from  Purchaser's  Default.   Upon  such
               payment, such Segments shall be conveyed to Purchaser as provided
               herein;

          D.   IF Purchaser fails to provide additional security as contemplated
               in Section 13.1B above,  DEVELOPER may terminate this  Agreement,
               and  thereafter  complete  any or all of the  remaining  Segments
               which  Purchaser  has not already  Accepted,  on such terms as it
               determines in its sole  discretion,  and Purchaser  shall have no
               further  right,   title  or  interest  in  such  Segments.  

  13.2    DEVELOPER'S  Default.  In the event of a Default by DEVELOPER pursuant
          to Article 12 hereof that continues beyond any notice and cure period,
          Purchaser  shall,  without  prejudice  to any  other  right or  remedy
          available  at law or  equity,  have  the  right  to  elect  any of the
          remedies set forth below. In any case, (i) DEVELOPER shall be entitled
          to retain any payments earned hereunder up to the date of Default, and
          (ii) DEVELOPER  shall retain its interest in any Segments on which the
          Purchaser  System  has been  Accepted  by  Purchaser,  and as to which
          DEVELOPER is not in Default  hereunder,  and the  Marketing  Agreement
          shall remain in effect with regard to such Segments.

          A.   Purchaser  may  temporarily  suspend  payment  of any sums  owing
               hereunder  until  such  Default  is  cured,  provided  that  such
               suspension  shall not delay the Segment  Completion  Date for any
               Segment or the Project Completion Date;

                                       18


          B.   Purchaser  may  require   additional   security  to  ensure  that
               DEVELOPER  retains  the  financial  and other  ability  to timely
               fulfill its obligations under this Agreement. Such security shall
               be as  determined  by Purchaser in its sole  discretion,  and may
               include, without limitation, additional financial guarantees by a
               DEVELOPER affiliate or other third party; escrowed funds; letters
               of credit; or a performance bond.

          C.   Purchaser may keep this Agreement in full force and effect,  take
               over  construction  of the Project as Developer  and complete the
               Project  in  accordance  with the  terms and  conditions  of this
               Agreement and the Project Budget,  and retain all title and other
               rights in any Segments  constructed  by Purchaser,  including the
               right  to  all  revenue  earned  from  such  Segments  under  the
               Marketing Agreement. In that event, DEVELOPER is hereby deemed to
               have  transferred  and assigned to Purchaser  any and all Project
               documents,  information,  supplies and  materials,  including all
               permits,  licenses,   authorizations,   contracts,   construction
               documents,   engineering  studies  and  reports,  designs,  maps,
               surveys and installation  information relating to the Project, to
               enable  Purchaser to complete the Project,  and  DEVELOPER  shall
               undertake  such other steps as are necessary to  effectuate  such
               assignment and transfer.  Purchaser  shall notify  DEVELOPER,  in
               writing,  when such Segments have been  Substantially  Completed,
               and  DEVELOPER  shall have the right to redeem  such  Segments by
               paying  within  thirty  (30) days  thereafter  (i) all sums owing
               hereunder in connection with such Segments;  (ii) that portion of
               the Management  Fee that would  otherwise be payable to DEVELOPER
               for such Segments;  and (iii) any loss,  cost,  damage or expense
               incurred by Purchaser in  connection  with  DEVELOPER's  Default.
               Upon  such  payments,  the  title  in such  Segments  that  would
               otherwise  have  been  owned  by  DEVELOPER  hereunder  shall  be
               conveyed to DEVELOPER;

          D.   If DEVELOPER fails to provide additional security as contemplated
               in Section 13.2B above,  Purchaser may terminate this  Agreement,
               and  thereafter  take over  construction  of the  Project on such
               terms as it  determines  in its sole  discretion,  and  DEVELOPER
               shall have no further right,  title or interest in any portion of
               the Project  constructed  from and after the date of Default.  In
               that event,  DEVELOPER  shall  transfer,  and hereby is deemed to
               have   transferred,   to   Purchaser   all   Project   documents,
               information, supplies and materials as provided above.


                                       19


NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

14.      LIMITED WARRANTY


          14.1 For a period of [ * * * ] following the  Acceptance  Date for the
               Purchaser  System,   DEVELOPER  warrants  that  the  engineering,
               design,  construction and installation of the Purchaser System is
               in compliance  with the Project  Specifications  and the terms of
               this  Agreement,  and  DEVELOPER  shall,  at its  sole  cost  and
               expense,  take  such  steps as are  necessary  to  promptly  cure
               failure of the  Purchaser  System to comply  with the  foregoing.
               Upon  termination  of the [ * * * ]  warranty  period,  Purchaser
               shall have no further recourse  whatsoever against DEVELOPER with
               respect to the engineering, design, construction and installation
               of the  Purchaser  System  except for  claims  made  during  such
               warranty period, for which DEVELOPER shall remain responsible.

          14.2 EXCEPT  AS SET  FORTH IN THIS  ARTICLE  14 OR AS MAY BE SET FORTH
               SPECIFICALLY AND EXPRESSLY ELSEWHERE IN THIS AGREEMENT, DEVELOPER
               MAKES NO  WARRANTY,  EXPRESS  OR  IMPLIED,  WITH  RESPECT  TO THE
               PURCHASER SYSTEM HEREUNDER, OR ANY SERVICES PROVIDED TO PURCHASER
               PURSUANT  HERETO,  INCLUDING ANY WARRANTY OF  MERCHANTABILITY  OR
               FITNESS FOR A PARTICULAR  PURPOSE OR USE, AND ALL SUCH WARRANTIES
               ARE HEREBY EXPRESSLY DISCLAIMED. THE WARRANTIES SET FORTH IN THIS
               AGREEMENT  CONSTITUTE  THE ONLY  WARRANTIES  MADE BY DEVELOPER TO
               PURCHASER  WITH RESPECT TO THIS AGREEMENT AND ARE MADE IN LIEU OF
               ALL OTHER  WARRANTIES,  WRITTEN  OR ORAL,  STATUTORY,  EXPRESS OR
               IMPLIED.

15.      MAINTENANCE

         Upon  the  mutual  execution  of  this  Agreement,  and  prior  to  the
         completion  of the  Project,  both  Parties  agree to negotiate in good
         faith to enter into a  maintenance  agreement  to maintain  the System,
         including    Purchaser's   System,    pursuant   to   the   Maintenance
         Specifications set forth in Exhibit H. The maintenance  agreement shall
         be  decided  on a  competitive  cost  basis  reasonably  acceptable  to
         Purchaser,  and  Purchaser  shall  have  the  right  to veto  any  such
         maintenance  provider  based  on  Purchaser's   reasonable  objections,
         including cost or past  experience  with any such proposed  maintenance
         provider.


16.      LEGAL REQUIREMENTS

         16.1     Regulatory Compliance by DEVELOPER
                  ----------------------------------

          16.1.1    Except as may appear to the  contrary  in this  Agreement,
                    DEVELOPER  shall  be fully  responsible  for  obtaining  and
                    maintaining  all required  regulatory  permits,  franchises,
                    authorizations, licenses, consents or approvals required 

                                       20

                    for  the   construction  of  the  Project  (the  "Permits").
                    Purchaser  shall  provide  such  assistance  to DEVELOPER in
                    fulfilling its  obligations  hereunder as DEVELOPER may from
                    time to time reasonably request.

          16.1.2    Any Permits (i) having a duration  (including any renewals
                    required  in order to continue to operate the Project or any
                    part  thereof) of greater than 12 months,  (ii) which impose
                    any ongoing  fees or  royalties,  or (iii) which  impose any
                    ongoing  covenants  (other than covenants having a duration,
                    including  any  renewals  required  in order to  continue to
                    operate the Project or any part thereof, of twelve months or
                    less),  shall be subject to the prior approval of Purchaser,
                    not  to  be  unreasonably   withheld  or  delayed,  and,  if
                    requested by  Purchaser,  such Permits may be required to be
                    obtained in the name of  Purchaser  or such other  person or
                    entity as Purchaser  may specify or jointly in such name and
                    DEVELOPER's   name.   DEVELOPER  shall  be  responsible  for
                    maintaining a comprehensive registry of all permits obtained
                    in  connection  with the Project,  and shall  provide a copy
                    thereof upon request to Purchaser.

         16.2     Compliance with Laws
                  --------------------

          16.2.1    DEVELOPER  shall  fully  comply  with all  provisions  of
                    applicable law in carrying out its obligations hereunder but
                    shall not be obliged under any  circumstances  whatsoever to
                    obtain  any  of  the  permits,   authorizations,   licenses,
                    consents or  approvals  to be obtained by  Purchaser  in the
                    conduct of its  business,  or the use and  operation  of the
                    Purchaser System by Purchaser.

          16.2.2    Purchaser shall be solely  responsible for compliance with
                    all legal and regulatory  requirements  associated  with its
                    business or with  ownership or  operation  of the  Purchaser
                    System, including without limitation obtaining,  maintaining
                    and  paying  for any and all  required  regulatory  permits,
                    franchises, authorizations,  licenses, consents or approvals
                    which  are  required  for  Purchaser's  use,  ownership  and
                    operation of the Purchaser System,  and DEVELOPER shall have
                    no  responsibility  or liability  whatsoever  in  connection
                    therewith.

         16.3  Compliance with Underlying Rights.
               ----------------------------------

               Purchaser  and   DEVELOPER   shall  comply  with  all  terms  and
               conditions of the Underlying Rights Requirements. DEVELOPER shall
               provide Purchaser with a copy of all Underlying Rights.

17.      INDEMNIFICATION AND LIABILITY

         17.1     Indemnities
                  -----------

          17.1.1    DEVELOPER hereby releases and agrees to indemnify, defend,
                    protect  and  hold  harmless   Purchaser,   its   directors,
                    officers,  stockholders,  agents,  and  employees,  and  its
                    respective successors or permitted assigns from and 

                                       21


                    against,  and assumes  liability for: (i) any and all causes
                    of action,  demands,  claims,  suits,  losses,  judgments or
                    costs,   including   without   limitation  legal  costs  and
                    reasonable attorney fees (collectively  "Damages") which may
                    be  brought  by or  asserted  by any of  DEVELOPER's  or its
                    affiliates'  subscribers,  any  person or  entity  providing
                    labor,  services or  materials  to  DEVELOPER,  or any other
                    action or matter of any nature arising out of, connected to,
                    or related to DEVELOPER's design, construction, maintenance,
                    operation or use of the System,  including any Segment,  and
                    (ii) each and every breach, or material default by DEVELOPER
                    of any of its covenants,  agreements,  duties or obligations
                    hereunder,  and  (iii) any  violation  by  DEVELOPER  of any
                    Underlying Rights Requirements, regulation, rule, statute or
                    court  order of any  local,  state or  federal  governmental
                    agency,   court  or  body  in  connection  with  DEVELOPER's
                    performance of its  obligations  under this  Agreement,  and
                    (iv) each and every breach or default of any of  DEVELOPER's
                    representations or warranties  contained herein; and (v) any
                    of the acts, omissions,  negligence or willful misconduct of
                    DEVELOPER   or  its   directors,   officers,   stockholders,
                    affiliates,  employees,  contractors or agents in connection
                    with the  performance  of this  Agreement,  unless the claim
                    results  from the actions or  omissions  of DEVELOPER at the
                    direction  or on the  request  of  Purchaser,  or  from  the
                    actions or omissions of  Purchaser,  or unless  liability is
                    otherwise  disclaimed in this  Agreement . The provisions of
                    this Section shall survive termination or expiration of this
                    Agreement,  and shall apply to circumstances arising before,
                    during and after Acceptance of any Segment.

          17.1.2    Purchaser hereby releases and agrees to indemnify, defend,
                    protect  and  hold  harmless   DEVELOPER,   its   directors,
                    officers,  stockholders,  agents,  and  employees,  and  its
                    respective successors or permitted assigns from and against,
                    and assumes liability for: (i) any and all causes of action,
                    demands,   claims,   suits,  losses,   judgments  or  costs,
                    including  without  limitation  legal  costs and  reasonable
                    attorney fees (collectively  "Damages") which may be brought
                    by or  asserted  by any  of  Purchaser  or  its  affiliates'
                    subscribers,  any person or entity providing labor, services
                    or materials to Purchaser,  or any other action or matter of
                    any  nature  arising  out of,  connected  to, or  related to
                    Purchaser's, construction,  maintenance, operation or use of
                    the  System,  and (ii) each and every  breach,  or  material
                    default by  Purchaser of any of its  covenants,  agreements,
                    duties or obligations hereunder,  and (iii) any violation by
                    Purchaser of any Underlying Rights Requirements, regulation,
                    rule,  statute or court order of any local, state or federal
                    governmental  agency,  court  or  body  in  connection  with
                    Purchaser's   performance  of  its  obligations  under  this
                    Agreement,  and (iv) each and every breach or default of any
                    of  Purchaser's   representations  or  warranties  contained
                    herein;  and (v) any of the acts,  omissions,  negligence or
                    willful misconduct of Purchaser or its directors,  officers,
                    stockholders,  affiliates,  employees, contractors or agents
                    in connection with the performance of this Agreement, unless
                    the claim results from the actions or omissions of Purchaser
                    at the direction or on the request of DEVELOPER, or from the
                    actions or omissions of  DEVELOPER, 


                                       22


                    or  unless   liability  is  otherwise   disclaimed  in  this
                    Agreement.  The  provisions  of this Section  shall  survive
                    termination or expiration of this Agreement, and shall apply
                    to circumstances arising before, during and after Acceptance
                    of any Segment.

          17.1.3    The  Parties  agree to  promptly  provide  each other with
                    notice of any  lawsuit,  judicial,  administrative  or other
                    dispute resolution,  action, proceeding or claim of which it
                    becomes  aware  and  which  it  believes  may  result  in an
                    indemnification  obligation  hereunder  (each, an "Action");
                    provided  that the failure to provide any such notice  shall
                    not  affect   the   indemnifying   Party's   indemnification
                    obligation   unless  the  indemnifying   Party  is  actually
                    prejudiced  by the  failure to receive  such notice and then
                    only to the extent of such  prejudice.  After receipt of any
                    such notice, if the indemnifying  Party shall acknowledge in
                    writing to the indemnified Party that the indemnifying Party
                    shall  be  obligated  under  the  terms  of  this  indemnity
                    hereunder  in   connection   with  such  Action,   then  the
                    indemnifying Party shall be entitled, if it so elects (i) to
                    take  control  of the  defense  and  investigation  of  such
                    Action,  (ii) to  employ  and  engage  attorneys  of its own
                    choice,  which are reasonably  acceptable to the indemnified
                    Party,  to handle and defend the same,  at the  indemnifying
                    Party's cost, risk and expense,  unless the named Parties to
                    such  action or  proceeding  include  both the  indemnifying
                    Party and the indemnified  Party and the  indemnified  Party
                    has been advised in writing by counsel that there may be one
                    or more legal defenses  available to such indemnified  Party
                    that are different from or additional to those  available to
                    the indemnifying  Party, in which case the indemnified Party
                    shall also have the right to employ  its own  counsel in any
                    such  case with the  reasonable  fees and  expenses  of such
                    counsel being borne by the indemnifying  Party, and (iii) to
                    compromise  or  settle  such  Action,  which  compromise  or
                    settlement  shall be made only with the  written  consent of
                    the indemnified  Party,  such consent not to be unreasonably
                    withheld or delayed, provided,  however, such consent of the
                    indemnified  Party  is  not  required  if  such  settlement,
                    compromise  or consent  includes  as an  unconditional  term
                    thereof  given  by  the  claimant  or the  plaintiff  to the
                    indemnified  Party a full  release  from  all  liability  in
                    respect  of  such   indemnifiable   claim.   Notwithstanding
                    anything  in this  Section  17.1.3 to the  contrary,  (i) if
                    there  is a  reasonable  probability  that an  indemnifiable
                    claim may materially adversely affect the indemnified Party,
                    other  than as a result  of  money  damages  or other  money
                    payments,  the  indemnified  Party  shall  have the right to
                    participate  in such defense,  compromise or settlement  and
                    the  indemnifying  Party shall not,  without the indemnified
                    Party's   written   consent  (which  consent  shall  not  be
                    unreasonably withheld or delayed),  settle or compromise any
                    indemnifiable  claim or consent to entry of any  judgment in
                    respect  thereof  unless  such  settlement,   compromise  or
                    consent includes as an unconditional  term thereof giving by
                    the  claimant or the  plaintiff to the  indemnified  Party a
                    full  release   from  all   liability  in  respect  of  such
                    indemnifiable  claim.  In all such  cases,  the  indemnified
                    Party shall cooperate in the defense of the Action.

                                       23


NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

     17.2 Force Majeure
          -------------

          In no  event  shall  either  Party  be  liable  to the  other  for any
          non-performance  or breach of  contract,  or for any costs,  losses or
          damages,  including without limitation loss of profit or consequential
          damages of any type whatsoever  under this  Agreement,  which arise by
          reason of or under conditions of Force Majeure.

     17.3 Loss of Profit, Indirect and Consequential Damages
          --------------------------------------------------

          Notwithstanding  any other provision in this Agreement,  neither Party
          shall be liable to the other for any loss of profit or revenues,  cost
          of capital, nor indirect, incidental, consequential, punitive, special
          or  exemplary  damages  of any  type  whatsoever  arising  under  this
          Agreement.

     17.4 Limitation on Damages
          ---------------------

          Notwithstanding  any other provision of this Agreement,  neither Party
          shall be liable to the other for any breach hereof or for any claim of
          any nature  whatsoever  in the  aggregate  in excess of [ * * * ] This
          Section 17.4 shall not form the basis of any claim  against  DEVELOPER
          in and of itself,  and shall not increase or enlarge the  liability of
          DEVELOPER established pursuant to the other terms of this Agreement or
          otherwise.  This  Section  17.4 shall not limit any claim by Purchaser
          against an insurer under any insurance  policy  specified and provided
          hereunder.  This Section  shall not apply to claims  under  Article 14
          (Limited Warranty), Section 10.1.1 (Liquidated Damages), or Article 13
          (Termination).

18.      TAXES

         18.1  Each Party shall bear [ * * * ] share of any and all taxes levied
               by any authority in respect of the  construction  of the Project,
               provided  that this shall not apply to any taxes on the income or
               capital of the other Party. Without limiting the foregoing, taxes
               shall  include  all  sales  taxes,  municipal  taxes,  levies  or
               assessments, and goods and services taxes, fees or other charges.

         18.2  The  Parties  agree to  negotiate  in good  faith  with a view to
               minimizing  any  taxes  that  may be due in  connection  with the
               Project.   The   Parties   acknowledge   that  this  may  involve
               amendments, among other things, to the terms of this Agreement or
               any maintenance agreements.

         18.3  Notwithstanding  the foregoing,  all taxes,  assessments or other
               fees associated with Purchaser's purchase,  lease, ownership, use
               or  operation  of  the   Purchaser   System  shall  be  the  sole
               responsibility of the Purchaser, including but not limited to all
               sales  taxes and all  taxes,  other than  taxes  measured  by net
               income, imposed on

                                       24


NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

               DEVELOPER  with  respect to the sale,  lease,  ownership,  use or
               operation of the  Purchaser  System.  All such taxes  required by
               applicable  law to be paid or  remitted  by  DEVELOPER  shall  be
               separately  stated on invoices or  statements to Purchaser to the
               extent permitted by applicable law.

         18.4  Notwithstanding  any  provision  to the contrary  herein,  either
               DEVELOPER  or  Purchaser  shall  have  the  right to  protest  by
               appropriate proceedings the imposition and/or amount of any taxes
               or  franchise,  license or permit  fees,  interest  or  penalties
               imposed  or  assessed  against  it due to its  use of the  System
               and/or  based on the physical  location of the System  and/or the
               construction  thereof  ("Additional  Taxes").  In such event, the
               protesting  Party shall  protect,  indemnify,  hold  harmless and
               defend,  at the  protesting  Party's sole cost and  expense,  the
               other from and  against  any costs,  expenses,  damages or losses
               incurred by the non-protesting Party, or other reasonable charges
               or  expenses,  including  reasonable  attorney  fees,  which  are
               incurred  by  the  non-protesting   Party  as  a  result  of  the
               protesting Party's protest,  including,  without limitation,  any
               Additional  Taxes  or  any  deficiency  asserted  by  any  taxing
               authority. 

19. REGENERATION FACILITES

         19.1  Subject to the terms and conditions of the maintenance agreement,
               DEVELOPER grants to Purchaser the following rights for the use of
               the regeneration facilities constructed pursuant to Exhibit F.

               19.1.1 The right of access  and  entry  under the same  terms and
                      conditions as DEVELOPER.

               19.1.2 The right to utilize an equal amount of collocation  space
                      with DEVELOPER, or [ * * * ] whichever is greater.

               19.1.3 The right to  utilize on an equal  basis  with  DEVELOPER,
                      common amenities such as power and fire suppression.

               19.1.4 All  rights  and  privileges  that  DEVELOPER  has in each
                      regeneration  facility (including the right to sub-lease 
                      the space allocated for Purchaser's use).


          19.2      Both  Parties  agree  that upon  either  Party's  receipt of
                    payment  (monthly,  quarterly  or yearly as the case may be)
                    from  a  third  party  to  lease  collocation  space  in any
                    regeneration   facilities   constructed   by   DEVELOPER  in
                    accordance with this Agreement,  the contracting Party shall
                    remit to the non-contracting  Party a sum equal to [ * * * ]
                    received  from  the  third  party  for the  right to use the
                    regeneration facilities.  Each Party shall have the right to
                    review and approve all agreements

                                       25


                    associated  with  the  use  of  collocation   space  in  the
                    regeneration  facilities by either Party prior to execution,
                    which consent shall not be unreasonably conditioned, delayed
                    or withheld.

20.      REPRESENTATIONS AND WARRANTIES


         20.1 Each Party represents and warrants to the other that:
              ----------------------------------------------------

            20.1.1  it has been duly created,  is validly existing and has the
                    company or partnership power and authority to enter into and
                    perform its  obligations  under this Agreement and otherwise
                    to carry on its business as presently conducted;

            20.1.2  the entry into and  performance of this Agreement will not
                    violate or constitute a default or breach under its Articles
                    of Incorporation and Bylaws, any laws or orders binding upon
                    it or any agreement to which it is a party;

            20.1.3  there  is  no  litigation  or  administrative  proceeding
                    pending or, to its  knowledge,  threatened  against it which
                    could  reasonably  be  expected  to have a material  adverse
                    effect on its financial condition or business;

            20.1.4  this  Agreement  has been duly  authorized,  executed  and
                    delivered and is binding on it and enforceable against it in
                    accordance with its terms; and

            20.1.5  it shall,  at all times,  use  equipment  and operate in a
                    manner which will not damage or cause  injury or  impairment
                    to the Project.

         20.2  Except as  specifically  set forth in this  Agreement,  DEVELOPER
               makes  no  representations  or  warranties  with  respect  to the
               engineering,  design,  capacity,  construction,  installation  or
               functions of the Purchaser System.


21.        COVENANTS OF DEVELOPER

          21.1 DEVELOPER  shall  provide  Purchaser  with a copy of a  corporate
               resolution approving entering into this Agreement;

          21.2 At the time  DEVELOPER  transfers the ownership and title to each
               Segment of the Purchaser's System to the Purchaser,  such Segment
               of the  Purchaser  System  shall be free and clear of all  liens,
               mortgages, security interests and encumbrances, as more fully set
               forth in the bill of sale attached hereto as Exhibit I;

          21.3 To the  best of  DEVELOPER's  knowledge,  there  are no  existing
               claims  or facts  which  give  rise to any  claims,  which  could
               interfere  with the  construction  or operation of the Project in
               any way;

          21.4 DEVELOPER  has  complied  in all  material  respects  with  laws,
               regulations and orders; and

                                       26


NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.


          21.5 Within  seven (7) days of the time  Purchaser  makes any  payment
               hereunder,  DEVELOPER  shall  have  paid to its  contractors  and
               suppliers all amounts  owing to them in connection  with the work
               for which  Purchaser's  payment is made  (provided that DEVELOPER
               may use  Purchaser's  payment for such  purpose).  Subject to the
               foregoing,  in the event a lien is filed against the title to the
               Project by any of DEVELOPER's contractors,  material suppliers or
               any other person  providing  services to the  Project,  DEVELOPER
               shall within thirty (30) days obtain a bond as security to remove
               such lien from the title to the Project.  If  DEVELOPER  fails to
               release and discharge any such claim of lien against the title to
               the Project,  Purchaser may, at its option,  discharge or release
               the claim of lien or otherwise deal with the lien  claimant,  and
               DEVELOPER  shall pay  Purchaser any and all costs and expenses of
               Purchaser  in so  doing,  including  reasonable  attorney's  fees
               incurred by Purchaser.

          21.6 DEVELOPER  shall give Purchaser  copies of any written notices it
               receives  concerning  the Project that allege failure to make any
               payment due or allege facts which, if true,  would materially and
               adversely  delay  completion  of any portion of the  Project,  or
               result in any material increase in cost to Purchaser.

22.      COVENANTS OF PURCHASER

          22.1 Purchaser shall at all times following the Acceptance Date of the
               Purchaser  System be responsible for maintaining in good standing
               all licenses, authorizations, consents and approvals which shall,
               from time to time,  be required for  Purchaser to use and operate
               each Segment of the Purchaser System.

          22.2 Purchaser  shall provide  DEVELOPER with a copy of the Resolution
               of its Board of Directors approving entering into this Agreement.

23.      DEVELOPER TO INSURE PRIOR TO FINAL ACCEPTANCE DATE

          23.1 DEVELOPER agrees to consult with Purchaser to obtain and maintain
               at all times during the construction of the Project the following
               insurance  coverage as part of the  Project  Costs with terms and
               conditions acceptable to Purchaser:

               23.1.1    Professional Liability Insurance in the amount of
                         [ * * * ]

               23.1.2    Comprehensive  General  Liability  Insurance  in the
                         amount  of  [  * * *  ],  or  such  higher  amounts  as
                         determined  by  DEVELOPER,  with a cross  liability and
                         severability of interest clause endorsement;

               23.1.3    Workers   Compensation   Insurance  and   Employer's
                         Liability  Insurance in the amount of [ * * * ] or as
                         required by law;

               23.1.4    Course  of  Construction   Insurance  for  the  full
                         replacement value of the

                                       27


NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.


                         Project with the deductible amount not to exceed 
                         [ * * * ];

               23.1.5    Railroad Liability Insurance, where and to the extent
                         required by the owners of any rights of ways;

               23.1.6    Builders Risk Insurance in the amount of [ * * * ] or
                         as required by law;

               23.1.7    Umbrella  Excess  Liability  with  limits of not less
                         than [ * * * ] combined  single  limit in excess of the
                         above-referenced    Comprehensive   General   Liability
                         Insurance.

          The  Purchaser  shall  be  added  as  an  additional  insured  in  the
          Comprehensive  General  Liability  Insurance  policy  referred  to  in
          Section  23.1.2.  DEVELOPER  shall obtain  policies  with  financially
          reputable  insurer(s)  with at least  an A.M.  Best  rating  of "A" or
          better,   which  are   lawfully   approved   to  do  business  in  all
          jurisdictions  where  any work is  performed  and that are  reasonably
          acceptable to Purchaser.  A certified  copy of such policies  shall be
          provided  to the  Purchaser,  which will  provide for thirty (30) days
          written  notice  to  the  Purchaser  prior  to  any   cancellation  or
          modification  to the policy.  In addition,  all  policies  referred to
          above,  except  Workers  Compensation,   shall  contain  a  waiver  of
          subrogation  clause  in  favor  of  all  insureds,   their  respective
          employees, agents, representatives, directors or officers.

               23.1.8    All Risks Construction  Equipment  Insurance to cover
                         all  of the  equipment  engaging  in  the  construction
                         activity.

               23.1.9    Automobile  Liability  Insurance  in the  amount  of
                         [ * * * ] for all DEVELOPER owned vehicles.


          23.2 The insurance  policies referred to in Sections 23.1.5 and 23.1.6
               shall  terminate  when the  ownership  and  title  of the  entire
               Purchaser  System  transfers to the  Purchaser.  Thereafter,  the
               Purchaser  shall  obtain  and  maintain  property  and  liability
               insurance coverage pursuant to the provisions of Article 24.

24.       PARTIES TO INSURE FOLLOWING ACCEPTANCE DATE

          24.1 As  of  and  following  the  Acceptance  Date  of  each  Segment,
               DEVELOPER and the Purchaser  shall each cooperate with each other
               to obtain and maintain the following insurance  coverage:  

               24.1.1  Insurance  coverage  as  set  forth  in  the  maintenance
                       agreement; and

               24.1.2   Any insurance coverage that is required by law; and

               24.1.3  Any  insurance  coverage  that  either  Party  reasonably
                       considers necessary.

                                       28


25.      FURTHER ASSURANCES

      Each of DEVELOPER  and  Purchaser  shall,  from time to time,  execute and
      deliver all such further  documents  and  instruments  and do all acts and
      things as the other Party may reasonably  require to effectively carry out
      or  better  evidence  or  perfect  the full  intent  and  meaning  of this
      Agreement.


26.      FEES


      Each Party hereto will pay their respective legal and accounting costs and
      expenses  incurred  in  connection  with the  preparation,  execution  and
      delivery of this  Agreement  and all documents  and  instruments  executed
      pursuant hereto and any other costs and expenses  whatsoever and howsoever
      incurred.


27.      PUBLIC ANNOUNCEMENTS


      No public  announcement or press release  concerning this Agreement may be
      made by  DEVELOPER  or  Purchaser  without  the  prior  consent  and joint
      approval of DEVELOPER and Purchaser,  not to be  unreasonably  withheld or
      delayed, except as required under applicable law or in connection with the
      obligations of a public company.

28.  BENEFIT OF THE AGREEMENT

      This  Agreement  will  enure to the  benefit  of and be  binding  upon the
      respective  heirs,  executors,  administrators,  successors  and permitted
      assigns of the Parties hereto.


29.  ENTIRE AGREEMENT

      This Agreement constitutes the entire agreement between the Parties hereto
      with respect to the subject  matter hereof and cancels and  supersedes any
      prior  understandings  and  agreements  between the Parties  with  respect
      thereto.


                                       29



30.  AMENDMENTS AND WAIVERS

      No amendment to this  Agreement  will be valid or binding unless set forth
      in writing and duly executed by both of the Parties  hereto.  No waiver of
      any breach of any provision of this Agreement will be effective or binding
      unless made in writing and signed by the Party purporting to give the same
      and,  unless  otherwise  provided,  will be limited to the specific breach
      waived.


31.      ASSIGNMENT

         31.1  This Agreement may not be assigned by Purchaser without the prior
               written  consent of  DEVELOPER  not to be  unreasonably  withheld
               provided,  however,  that  this  Agreement  may  be  assigned  by
               Purchaser  without the consent of  DEVELOPER  to an  affiliate of
               Purchaser,  as set  forth  in Rule 405 of the  Securities  Act of
               1933,  as amended (or  another  entity,  directly or  indirectly,
               controlling,   controlled   by  or  under  common   control  with
               Purchaser, or the successor to Purchaser by merger or purchase of
               all or substantially all of Purchaser's  equity or assets) (each,
               an  "Affiliate"),  provided  that such  Affiliate  enters  into a
               written agreement with DEVELOPER to be bound by the provisions of
               this  Agreement  in  all  respects  and  to the  same  extent  as
               Purchaser  is bound and  provided  further  that  Purchaser  will
               continue to be bound by all the obligations  hereunder as if such
               assignment  had not occurred and perform such  obligations to the
               extent that such Affiliate fails so to do.

         31.2  This Agreement may not be assigned by DEVELOPER without the prior
               written  consent  of  Purchaser,   which  consent  shall  not  be
               unreasonably withheld, provided, however, that this Agreement may
               be assigned by  DEVELOPER  without the consent of Purchaser to an
               Affiliate of DEVELOPER,  provided that such Affiliate enters into
               a written  agreement with Purchaser to be bound by the provisions
               of this  Agreement  in all  respects  and to the same  extent  as
               DEVELOPER  is bound and  provided  further  that  DEVELOPER  will
               continue to be bound by all of the  obligations  hereunder  as if
               such assignment had not occurred and perform such  obligations to
               the extent that such Affiliate fails so to do.

         31.3  Notwithstanding  any other provision of this  Agreement,  any and
               all amounts payable to DEVELOPER arising from or relating to this
               Agreement  may be  assigned  by  DEVELOPER  by  way  of  absolute
               assignment or by way of security or otherwise without the consent
               of  Purchaser  for the  purpose  of  securing  project  or  other
               financing by DEVELOPER in respect of its  obligations  hereunder;
               provided  that the assignee  agrees to take any funds  subject to
               Purchaser's  rights under this Agreement and be fully responsible
               to Purchaser for any monies received from DEVELOPER.

         31.4  Notwithstanding  any other  provision of this  Agreement,  either
               Party may assign  this  Agreement  as  collateral  security  to a
               lender.

32.      NOTICES


          Any demand,  notice or other  communication  to be given in connection
          with  this  Agreement  will be given in  writing  and will be given by
          personal  delivery,  by certified or  registered  mail or by facsimile
          addressed to the recipient as follows:


                                       30


         To DEVELOPER:              Pacific Fiber Link, LLC.
                                    1333 W. 120th Avenue, Suite 216
                                    Westminster, Colorado 80234
                                    Attention: President
                                    Attention: General Counsel
                                    Facsimile Number: (303) 450-6102

         To Purchaser:              Pathnet, Inc.
                                    1015 31st Street, N.W.
                                    Washington, D.C. 20007
                                    Attn: Vice President, Corporate Development
                                    Attn: General Counsel
                                    Facsimile Number: (202) 624-7824

         or to such other  address,  individual  or  facsimile  number as may be
         designated  by notice given by either  Party to the other.  Any demand,
         notice  or  other  communication  given  by  personal  delivery  or  by
         certified or registered  mail will  conclusively be deemed to have been
         given on the day of actual delivery thereof and, if given by facsimile,
         on the day of transmittal  thereof if given during the normal  business
         hours of the recipient and on the Business Day during which such normal
         business  hours next occur if not given  during  such hours on any day,
         provided  that the sender of the  facsimile  receives  confirmation  of
         delivery of the facsimile transmission by personal delivery,  certified
         or  registered  mail.  If the Party giving any demand,  notice or other
         communication  knows or ought  reasonably  to know of any  difficulties
         with the postal system that might affect the delivery of mail, any such
         demand,  notice or other  communication  may not be mailed  but must be
         given by personal delivery or by facsimile.

33.      GOVERNING LAW

         This  Agreement  shall be governed by and construed in accordance  with
         the domestic  laws of the State of New York,  without  reference to its
         choice of law principles.

34.      DISPUTE RESOLUTION

         If the  Parties  are  unable to  resolve  any  disagreement  or dispute
         arising  under  or  related  to  this  Agreement,   including   without
         limitation,  the  failure  to agree  upon any item  requiring  a mutual
         agreement of the Parties hereunder, they shall resolve the disagreement
         or dispute as follows:

         34.1  Attempt to settle such dispute by mutual  discussion  between Ron
               Stevenson  and Jerry Tharp,  acting on behalf of  DEVELOPER,  and
               Bill Smedberg and Dick Jalkut, acting on behalf of Purchaser,  or
               such other persons as may nominated by the Parties.

         34.2  If the matter  has not been  resolved  by the  mutual  discussion
               required by paragraph 34.1 within thirty (30) business days after
               the date on which the dispute  arose,  then,  the  Parties  shall
               endeavor   to  settle  the   dispute  by   mediation   under  the
               Construction Industry Mediation Rules of the American Arbitration
               Association.

                                       31


         34.3  If such dispute  cannot be settled  within  thirty (30)  business
               days after  submission  to mediation  pursuant to paragraph  34.2
               hereof,  such  dispute  shall  finally be resolved by an arbitral
               tribunal  consisting  of  three  (3)  independent  and  impartial
               arbitrators (the  "Tribunal"),  under the  Construction  Industry
               Arbitration  Rules of the American  Arbitration  Association (the
               "Arbitration Rules"). Each Party shall appoint one (1) arbitrator
               within fifteen (15) days after  initiation of arbitration and the
               two (2)  arbitrators  so  appointed  shall  select a third  (3rd)
               arbitrator  as the chairman of the Tribunal  within  fifteen (15)
               days of the  appointment of the second  arbitrator.  In the event
               that the Parties or the arbitrators fail to select arbitrators as
               required above,  the AAA shall select such  arbitrators.  The AAA
               shall have the  authority to  disqualify  any  arbitrator  who it
               determines not to be independent  and impartial.  The arbitrators
               shall be  entitled  to a fee  commensurate  with  their  fees for
               professional  services  requiring similar time and effort.  Venue
               for the arbitration shall be Denver, Colorado.

         34.4  Arbitration  discovery  shall be conducted in accordance with the
               Federal  Rules of Civil  Procedure,  with any  disputes  over the
               scope of discovery to be determined by the arbitrators,  it being
               intended that the  arbitrators  shall allow  limited,  reasonable
               discovery  prior to any  hearing on the merits.  The  arbitrators
               shall  conduct a hearing  no later  than  sixty  (60) days  after
               initiation of the matter to arbitration,  and a decision shall be
               rendered  by the  arbitrators  within  thirty (30) days after the
               hearing. At the hearing,  the Parties shall present such evidence
               and  witnesses  as they  may  choose,  with or  without  counsel.
               Adherence to formal  rules of evidence  shall not be required but
               the  arbitration  panel shall consider any evidence and testimony
               that it determines to be relevant,  in accordance with procedures
               that  it   determines   to  be   appropriate.   The   arbitration
               determination  shall be in writing and shall  specify the factual
               and legal bases for the determination.  The arbitrators may award
               legal or equitable relief,  including but not limited to specific
               performance,  and any  award  of  damages  shall  be  limited  as
               provided in this Agreement. The arbitrators' fees and other costs
               of the  arbitration  shall be borne by the Party against whom the
               award is rendered,  except as the arbitration panel may otherwise
               provide in its written opinion.  Notwithstanding  anything herein
               to the contrary,  DEVELOPER or Purchaser  may, prior to the final
               decision  rendered by a mediator or arbitrator,  petition a state
               or  federal  court  for  a  temporary   restraining  order  or  a
               preliminary  injunction upon a showing of the requisites therefor
               in such court. The foregoing  provision for court  proceedings is
               intended to be limited to those cases in which  emergency  access
               to the court is necessary to prevent  immediate  and  irreparable
               harm in the interim period until  mediation or arbitration can be
               completed.

         34.5  The Parties agree that this submission and agreement to arbitrate
               shall be governed by and  specifically  enforceable in accordance
               with the laws of the  State of New  York.  The  Parties  agree to
               abide  by all  decisions  and  determinations  rendered  in  such
               proceedings. Such decisions and determinations shall be final and
               binding on all Parties.  All decisions and  determinations may be
               filed  with the clerk of one or more  courts,  state,  federal or
               foreign  having  jurisdiction  over the Party  against whom it is
               rendered or its property, as a basis of judgment.

                                       32


         34.6  Pending the  resolution or  settlement  of a dispute  between the
               Parties  as set forth in this  Article  34,  the  Parties  hereby
               expressly  agree that the  performance of its  obligations  under
               this  Agreement  shall  not be  delayed,  suspended,  impeded  or
               hindered.



35.      CONFIDENTIAL INFORMATION


     35.1 As  used in  this  Agreement,  "Confidential  Information"  means  all
          information of either Party that is not generally known to the public,
          whether of a technical,  business or other nature (including,  without
          limitation,  trade secrets,  know-how and information  relating to the
          technology,  customers,  business  plans,  promotional  and  marketing
          activities,  finances and other business  affairs of such Party).  The
          Parties  understand  and agree that this  Agreement and all materials,
          maps,  engineering  designs and  documents,  construction  techniques,
          pricing and other information as may be necessarily  exchanged between
          them in fulfilling the provisions and intents of this  Agreement,  are
          and shall be  Confidential  Information.  Each  Party  shall  disclose
          Confidential Information only to its affiliates,  directors,  officers
          and  employees  with  a  need  to  know  and  shall  keep  secret  all
          Confidential  Information  of the other Party except as  authorized by
          the  respective  owners.  This  obligation  shall continue to bind any
          Party after it shall cease to be a Party for whatever reason and shall
          survive   termination  of  this  Agreement  but  such   obligation  of
          confidentiality shall not apply:


          35.1.1    to a  disclosure  to a person  who  knew the  confidential
                    information prior to its being disclosed;

          35.1.2    to information  which comes into the public domain without
                    any breach of the provisions of this Article;

          35.1.3    to  disclosure  of  information  which is  disclosed  on a
                    confidential basis to consultants or advisers of a Party who
                    have a bona fide need to know to  assist  that  Party in the
                    carrying out of the terms of this Agreement;

          35.1.4    to a disclosure of information  required by a governmental
                    or judicial law, order, rule or regulation;

          35.1.5    to a  disclosure  of  information  which is  disclosed  in
                    proceedings taken by either Party for the enforcement of any
                    of its rights and remedies under this Agreement;

          35.1.6    in connection with one's obligations as a public company;

          35.1.7    to  third  parties  in  connection   with   financing  or
                    investments   on  a  need  to  know  basis,   provided  such
                    recipients  agree to be bound by the  confidentiality  terms
                    hereof;.

                                       33


          35.1.8    such  information  that  is  reasonably   necessary  (and
                    specifically   excluding   any   Confidential    Information
                    concerning another Party's business plans, goals, strategies
                    or other  proprietary  information) in connection with sales
                    and marketing efforts.


             If any  Confidential  Information is required to be disclosed under
             this  Section,  disclosure  shall be limited only to persons with a
             need to know, and the  disclosing  Party shall provide prior notice
             of such  disclosure  to the other Party to give such other Party an
             opportunity,  at its own  expense,  to  oppose  or  seek  to  limit
             disclosure.


     35.2 The provisions of this Article shall survive expiration or termination
          of this Agreement.



36.      PATENTS AND COPYRIGHTS

          Each  Party  acknowledges  the  rights of the other  Party in  certain
          patents  and  copyrighted  material  the other  Party may  possess  or
          develop in the  performance  of this  Agreement or in the operation of
          the System. Each Party further acknowledges that any such rights shall
          remain the exclusive  property of the owning Party, and the non-owning
          Party shall have no interest in such rights by virtue of the existence
          of this  Agreement  between the Parties.  Each Party agrees to use its
          reasonable  efforts  to protect  such  rights in  dealings  with third
          parties.


37.      TIME

          Time shall be of the essence of this Agreement.


38.      LANGUAGE

          The Parties  have  expressly  requested  that this  agreement  and its
          ancillary documents be drafted in English.


39.      SEVERABILITY

          If any term,  covenant or condition  contained  herein  shall,  to any
          extent,  be invalid or  unenforceable  in any  respect  under the laws
          governing  this  Agreement,  so  long  as  such  invalidity  does  not
          materially  impair the benefit of this Agreement to either Party,  the
          remainder of this Agreement  shall not be affected  thereby,  and each
          term,  covenant  or  condition  of this  Agreement  shall be valid and
          enforceable to the fullest extent permitted by law.


40.      RELATIONSHIP

          The Parties  acknowledge and agree that this Agreement does not create
          a  partnership  or  joint  venture   relationship  between  them.  The
          performance  by the  Parties of all duties and  obligations  hereunder
          shall be as independent  contractors  and not as agents or trustees of
          the other Party.  No Party shall owe any fiduciary  obligations to any
          other Party. Neither Party has any authority or capacity whatsoever to
          contract  for or on  behalf  of or bind the  other in  respect  


                                       34


          of any matter  related to these  presents  or  otherwise.  None of the
          employees of DEVELOPER  shall be considered to be servants,  employees
          or agents of Purchaser,  and none of the employees of Purchaser  shall
          be considered to be servants, employees or agents of DEVELOPER.


41.      SURVIVAL

          Any  provision  and  paragraph of this  Agreement  which by its nature
          extends beyond the term hereof or which is required to ensure that the
          Party  fully  exercise  their  rights and  perform  their  obligations
          hereunder,  shall  survive  the  expiration  or  termination  of  this
          Agreement for any cause whatsoever.


42.      BOARD APPROVAL

          This Agreement  shall be subject to the approval of each Party's Board
          of Directors.


43.      DUE DILIGENCE  

          For a period of fourteen (14) days after the date hereof, either Party
          may conduct such due  diligence on the other Party and on the proposed
          Project to determine  that the other Party has the  financial  ability
          and  internal   systems  and  processes  to  perform  its  obligations
          hereunder and that the proposed Project  Specifications are achievable
          within  the  Project  Budget  and will be  sufficient  to  permit  the
          completed  system to be used as  intended.  If, in the exercise of its
          good faith,  reasonable  judgment,  the  evaluating  Party  materially
          determines  that either  Party will be unable to complete  the Project
          within  the  Project  Budget  and  in  accordance   with  the  Project
          Specifications,  or meet the payment obligations under this Agreement,
          such Party may,  upon  written  notice to the other  Party at any time
          during such fourteen (14) day period,  terminate  this  Agreement,  in
          which event neither Party shall have any further right or  obligations
          to the other hereunder.


44.      CHICAGO TO NEW ORLEANS 

          DEVELOPER  or its  Affiliate,  is  currently  evaluating  a  potential
          fiber-optic telecommunications network between Chicago and New Orleans
          (the "Chicago/New Orleans Segment").  If DEVELOPER, or an Affiliate of
          DEVELOPER,  elects to develop that segment, the Parties will use their
          best efforts to enter into an  agreement  for the  development  of the
          segment on  substantially  the same terms and  conditions as set forth
          herein. Notwithstanding the foregoing, in the event that DEVELOPER, or
          an Affiliate of DEVELOPER, is required to jointly develop that segment
          with  the  provider  of  the  right  of  way  such  that   Purchaser's
          participation  in the  development,  on the terms provided for in this
          Agreement,  is not possible under the circumstances,  then the Parties
          will  instead   negotiate  in  good  faith  to  permit   Purchaser  to
          participate  in the deal in as  material  a fashion  as is  reasonable
          under the circumstances.


45.      FUTURE PURCHASER ROUTES

          Purchaser  or its  Affiliate,  is  currently  evaluating  a  potential
          fiber-optic  telecommunications network between Denver and Dallas (the
          "Denver/Dallas  Segment"). If Purchaser, or an Affiliate of Purchaser,
          elects to  develop  that  segment,  the  Parties  will use their  best
          efforts


                                       35


          to enter  into an  agreement  for the  development  of the  segment on
          substantially  the same  terms and  conditions  as set  forth  herein.
          Notwithstanding  the  foregoing,  in the event that  Purchaser,  or an
          Affiliate of  Purchaser,  is required to jointly  develop that segment
          with  the  provider  of  the  right  of  way  such  that   DEVELOPER's
          participation  in the  development,  on the terms provided for in this
          Agreement,  is not possible under the circumstances,  then the Parties
          will  instead   negotiate  in  good  faith  to  permit   DEVELOPER  to
          participate  in the deal in as  material  a fashion  as is  reasonable
          under the circumstances.

45.      SOLICITATION OF EMPLOYMENT

          Neither  Party  shall,  during  the life of this  Agreement  and for a
          period of two (2) years thereafter,  directly or indirectly for itself
          or  on  behalf  of,  or  in   conjunction   with,  any  other  person,
          partnership, corporation, business or organization, solicit employment
          of an employee of the other with whom that Party or its personnel have
          had  contact  during the course of the Project  under this  Agreement,
          unless that Party has  obtained  the  written  consent of the other to
          such solicitation.


46.      COUNTERPARTS

          This Agreement may be executed in any number of  counterparts  each of
          which shall be deemed an  original,  but all of which  together  shall
          constitute the same instrument.


                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]



                                       36




      IN WITNESS WHEREOF the Parties have executed this Agreement.


                                   PACIFIC FIBER LINK, LLC, a Washington limited
                                   liability company


                                   By:   /s/ [name illegible]
                                         --------------------------------
                                   Its:  Executive V.P.
                                         --------------------------------
                                   Date: March 31/99 
                                         --------------------------------
                                        
                                   PATHNET, INC., a Delaware corporation

                                   By:   /s/ Richard A. Jalkut
                                         --------------------------------
                                   Its:  President and CEO
                                         --------------------------------
                                   Date: 3/31/99
                                         --------------------------------




                                       37




NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

                                    EXHIBIT A
                                    ---------

                          PROJECT AND PURCHASER SYSTEM
                          ----------------------------

1.       The Project
         -----------
         A.       The Project will consist of [ * * * ] (as set forth below) and
                  shall   include   designing,   engineering,   permitting   and
                  constructing  a long-haul  conduit/fiber  optic  cable  system
                  between Aurora, Colorado and Chicago, Illinois.

         B.       The  Project  will  consist of [ * * * ]  conduits  that are a
                  minimum of [ * * * ] diameter and [ * * * ] count fiber  optic
                  cable (to include [ * * * ] fibers and [ * * * ] fibers)placed
                  in  one  (1) of  the  designated  conduits (i.e.  the  Primary
                  Conduit). The  Parties  may agree to increase or  decrease the
                  amount of fibers in  the  cable,  and/or  modify the  type and
                  specifications  of  fiber   within   the   cable,  across  the
                  Project as a whole,  or on specific  portions of the  Project,
                  all as agreed to by the Parties. Any incremental cabling costs
                  attributable  to cabling the two different types of fiber will
                  be borne by Purchaser.

         C.       The  Project  will  be  primarily  constructed  on  public and
                  private right-of-way.

2.       The Purchaser System
         --------------------
          The  Purchaser  System will consist of [ * * * ] that  is  a  minimum
          of [ * * * ]  diameter  (but  in no  event  smaller  than  DEVELOPER's
          conduit)  and [ * * * ] of the total number of fibers  pulled  through
          the Primary Conduit. The type,  specifications and number of fibers in
          the Purchaser System shall be as agreed to by the Parties and may vary
          across the Project.

          A.   The Purchaser System will also include the right to use [ * * * ]
               of  the  regeneration  facilities  and  all  other  appurtenances
               constructed  by DEVELOPER  as described in the Exhibits  attached
               hereto on behalf of the Project,  and the right to add additional
               regeneration facilities, splice boxes, interconnection facilities
               and  other  appurtenances,  all  at  Purchaser's  sole  cost  and
               expense.  The  Parties  will  agree on a  detailed  scope of work
               describing  the specific  equipment  and other  facilities  to be
               installed as part of the System.

          B.   The   regeneration   facilities   shall  be  located  within  the
               right-of-way and spaced approximately  forty-five (45) miles from
               each other unless mutually agreed to between the Parties.

          C.   The fiber utilized in constructing  the Purchaser System shall be
               [ * * * ], or as mutually agreed to between the Parties.

                                       38


NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

3.       Segment Completion Date Schedule:

                  Segment 1:        [ * * * ]
                  ----------       

                  Segment 2:        [ * * * ]
                  ---------- 
  
                  Segment 3:        [ * * * ]
                  ----------   

                  Segment 4:        [ * * * ]
                  ----------   

                  Segment 5:        [ * * * ]
                  ----------   

                  Segment 6:        [ * * * ]
                  ----------   

                  Segment 7:        [ * * * ]
                  ----------   

                  Segment 8:        [ * * * ]
                  ----------   

                  Segment 9:        [ * * * ]
                  ----------   

                  Segment 10:       [ * * * ]
                  ----------   

          **   All POP Site  locations for the Project shall be mutually  agreed
               to between the Parties.


                                       39




NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

                                    EXHIBIT B

                                 PAYMENT METHOD

     1.   Within thirty (30) days  following  the  execution of this  Agreement,
          DEVELOPER shall provide to the Purchaser a cash flow projection of the
          costs  of  the  Project  to be  incurred  during  each  month  of  the
          development and construction of the Project.  This projection shall be
          updated monthly.  The Parties shall also agree on the detailed Project
          Budget,  and a detailed Project Schedule that identifies the scheduled
          Segment Completion Date of each Segment.

     2.   The Parties  shall  establish a Project  escrow  account (the "Project
          Escrow")  from which Project  Costs will be paid.  The Project  Escrow
          will  initially  be funded on a date  agreed  to by the  Parties,  and
          thereafter,  by periodic payments on a schedule to be agreed to by the
          Parties.  Each  Party will  contribute  equal  amounts to the  Project
          Escrow.  Each Party's payment to the Project Escrow shall be [ * * * ]
          projected to become due and payable in the succeeding 30 days.

     3.   Following  the 1st of every  month  and no later  than the 10th of the
          month,  DEVELOPER  shall submit to the Purchaser a request for payment
          from  the  Project  Escrow  (the  "Draw   Request"),   accompanied  by
          reasonable supporting documentation describing work completed, Project
          Costs incurred and lien waivers from all contractors and suppliers who
          performed  services or supplied  materials in connection with the work
          that is the subject of the Draw  Request.  Purchaser,  within ten (10)
          days after receipt of the foregoing documents,  shall notify DEVELOPER
          in  writing  of any items  considered  by the  Purchaser  to have been
          improperly  included  as  Project  Costs.  A full  explanation  of the
          reasons  for  disputing  such  item or  items  shall be  furnished  to
          DEVELOPER  with the  dispute  note.  To the extent  DEVELOPER  and the
          Purchaser are otherwise  unable to resolve such dispute  through their
          respective  operating and administrative  personnel within thirty (30)
          days after  notice  thereof  from the  Purchaser,  the matter shall be
          submitted  for  dispute  resolution  as provided in Article 34 herein.
          Within ten (10) days after Purchaser's receipt of the Draw Request and
          foregoing documentation, Purchaser shall authorize the escrow agent to
          release from the Project  Escrow any amounts that  Purchaser  does not
          dispute as set forth in the payment request.

     4.   Following  the  completion  of each  Segment,  and of the Project as a
          whole, and within sixty (60) days thereafter,  DEVELOPER shall prepare
          and submit to the Purchaser a costs report relating to such Segment or
          the Project to reconcile all amounts  incurred in connection  with the
          Segment  or the  Project  and  finalize  the  Purchase  Price with the
          Purchaser  prior to the  transfer  of the  ownership  and title of the
          Segment  or the  Purchaser  System to the  Purchaser.  Any  additional
          payments to be made by the Purchaser to DEVELOPER or any refunds to be

                                       40


NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

          made by DEVELOPER to the Purchaser,  as the case may be, shall be made
          at the same time when the  ownership  and title of the  Segment or the
          Purchaser System transfers to the Purchaser.

     5.   Non-Project Costs to be paid by DEVELOPER out of the Management Fee:

          a)       [ * * * ]
          b)       [ * * * ]
          c)       [ * * * ]
          d)       [ * * * ]
          e)       [ * * * ]
          f)       [ * * * ]
          g)       [ * * * ]
          h)       [ * * * ]
          i)       [ * * * ]
          j)       [ * * * ]
          k)       [ * * * ]
          l)       [ * * * ]
          m)       [ * * * ]
          n)       [ * * * ]
          o)       [ * * * ]
          p)       [ * * * ]
          q)       [ * * * ]
          r)       [ * * * ]



                                       41


                                    EXHIBIT C

                    CONSTRUCTION SPECIFICATIONS AND DRAWINGS
                    ----------------------------------------

     1.   General
          -------   
  
          The intent of this  document  is to  outline  the  specifications  for
          construction  of a  fiber  optic  cable  system.  In  all  cases,  the
          standards  contained in this document or the standards of the federal,
          state,  local or private  agency  having  jurisdiction,  whichever  is
          stricter,  shall  be  followed.  Aerial  systems  are  not  acceptable
          alternatives  and  are  not  addressed  in  these  specifications  and
          standards.

     2.   Compliance
          ----------

          All work will be done in strict accordance with federal, state, local,
          and   applicable   private  rules  and  laws   regarding   safety  and
          environmental  issues,  including those set forth by OSHA and the EPA.
          In addition,  all work and the resulting fiber system will comply with
          the current requirements of all governing entities (FCC, NEC, DEC, and
          other national, state, and local codes).

     3.   Material
          --------

          The fiber optic cable shall be single  armor in design.  The cable may
          be either  loose tube or central  core in  construction.  The  central
          strength member shall be dielectric.  Each buffer tube or ribbon shall
          contain no more than 12 fibers.

          HDPE  shall be a minimum  of  SDR-11.  Steel or PVC  conduit  shall be
          minimum Schedule 40 wall thickness.  Steel conduit will be joined with
          threaded collars or welding.

          Any exposed steel conduit,  brackets,  or hardware shall be hot-dipped
          galvanized after fabrication.

          Handholes  shall  have a  minimum  load  rating  of H-20 with 18 to 24
          inches of soil  cover.  Dimensions  will  typically  be 30 by 60 by 30
          inches (W by L by H),  sufficient  in size to hold  cable  slack.  EMS
          markers will be  fabricated  in the lids of  handholes.  All handholes
          will have locking lids (pentahead or similar).

          Manholes shall have a minimum H-20 loading  rating.  All manholes will
          have locking lids (pentahead or similar).

          Buried cable warning tape shall be 3 inches wide and display "Warning:
          Buried Fiber Optic Cable" and emergency One Call "800" numbers printed
          every 24 inches.

                                       42


     4.   Minimum Depths
          --------------

          The minimum  cover  required in the  placement of conduit  shall be 42
          inches.  Additional  depth will be required in ditches (48 inches) and
          across  streams,  washes,  culvert  outfalls,  and other waterways (60
          inches).

          At locations where conduit crosses other subsurface utilities or other
          structures,  the conduit shall be installed to provide a minimum of 12
          inches  vertical  clearance  and the  applicable  minimum depth can be
          maintained;  otherwise,  the  conduit  will  be  installed  under  the
          existing utility or other structure.  If, however,  adequate clearance
          cannot be obtained and the conduit must be placed above, steel conduit
          shall be used.

          In rock,  the conduit depth shall be 36 to 42 inches in HDPE, 24 to 36
          inches  in  steel  conduit,  18 to 24  inches  in HDPE or PVC or steel
          conduit and concrete  encased.  PVC or HDPE conduit will be backfilled
          with  6  inches  of  select   materials   (padding)   in  rock  areas.
          Polyurethane  channel  (Fiber-Rockgard  or equivalent)  may be used as
          protective cover in lieu of select material padding.

          In the case of the  use/conversion  of  existing  steel  pipelines  or
          existing  conduit  systems,  the  existing  depth shall be  considered
          adequate.

     5.   Buried Cable Warning Tape
          -------------------------

          All conduits  will be installed  with buried cable warning tape except
          where existing steel  pipelines or existing  conduit systems are used.
          The warning tape shall be placed above the conduits with  generally 18
          to 24 inches of cover.

     6.   Conduit Construction
          --------------------

          Conduits may be placed by means of trenching,  plowing, jack and bore,
          or  directional  bore.  Conduits  will  generally be placed on a level
          grade  parallel to the  surface,  with only  gradual  changes in grade
          elevation.

          Crossings  of roads  maintained  by  government  bodies  and  railroad
          crossings will be encased in steel  conduit,  except where the conduit
          is placed with 10 feet or more of cover.

          All galvanized  steel conduits  placed on bridges shall have expansion
          joints placed at each structural  (bridge) expansion joint or at least
          every 300 feet,  whichever is the shorter distance.  For bridges under
          100 feet, with no bridge expansion  joint, no conduit  expansion joint
          is required.  For bridges  greater than 100 feet, at least one conduit
          expansion joint will be placed,  even if there is no bridge  expansion
          joint.

     7.   Innerduct Installation
          ----------------------

          Innerduct(s) shall be installed in all steel or PVC conduits. No cable
          will be  placed  directly  in any  split/solid  steel  or PVC  conduit
          without  innerduct.  Innerduct(s)  shall extend  beyond

                                       43


          the end of all  conduits a minimum of 12 inches.  Both the conduit and
          innerducts  shall be sealed with foam sealant  and/or duct plugs after
          installation.

     8.   Cable Installation
          ------------------

          The fiber optic cable shall be installed using a powered pulling winch
          and  hydraulic-powered  assist  pulling  wheels  or by  cable  blowing
          methods.  The maximum  pulling  force to be applied to the fiber optic
          cable shall be not exceed  manufacturer's  recommendations  (typically
          600  lbs).  The  cable  shall be  lubricated  during  placement  and a
          breakaway swivel utilized at all times.

          A  minimum  of 20  meters  of slack  will be left in all  intermediate
          handholes/manholes.  A minimum  of 30 meters of slack  (off each cable
          end) will be left in all splice point  handholes/manholes.  Sufficient
          slack will be left at  facilities  to reach the FDP and provide for 10
          meters of slack at the site.

     9.   Handholes/Manholes
          ------------------

          Handholes/manholes  will be installed  at intervals  not to exceed one
          mile. Manholes are to be installed in street builds.


     10.  Cable Markers (Warning Signs)
          -----------------------------

          Cable markers  shall be installed at sufficient  frequency to mark the
          location of the cable. Markers shall be positioned so that they can be
          seen  from  the  location  of  the  cable  and  generally  set  facing
          perpendicular to the cable running line. In rural areas, markers shall
          be placed a minimum of every 1,000 feet. In urban areas, markers shall
          be  placed a  minimum  of every 500 feet.  Changes  in  running  line,
          handholes,  both sides of government-maintained  roads, railroads, and
          major waterway crossings will be marked with warning signs.








                                       44





NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

                                    EXHIBIT D

             FIBER CABLE SPLICING TESTING AND ACCEPTANCE PROCEDURES
             ------------------------------------------------------

     1.   All  splices  will  be  performed  with  an  industry-accepted  fusion
          splicing machine.

     2.   Splices will be qualified during initial  construction with an Optical
          Time Domain Reflectometer (OTDR) from only one direction.  The profile
          alignment  system or light  injection  detection  system on the fusion
          splicer  may be used to qualify  splices in lieu of an OTDR,  provided
          both  Parties  agree a close  correlation  to the OTDR  values  can be
          established. Connector (pigtail) splices will be qualified with a 1 km
          launch reel.

     3.   After   end-to-end   (site-to-site)   connectivity   on  the   fibers,
          bi-directional  span testing will be done. These  measurements must be
          made after the splice  manhole or handhole is closed in order to check
          for macro-bending problems. Connectors will be cleaned as necessary to
          ensure accurate measurements are taken.

          3.1  Installed  loss  measurements  at [ * * * ] nm will  be  recorded
               using  an   industry-accepted   laser  source  and  power  meter.
               Continuity  testing (checking for "frogging") will be done on all
               fibers concurrently.

          3.2  OTDR  traces  will  be  taken  at [ * * * ] nm  and  splice  loss
               measurements will be analyzed.  GN Nettest Laser Precision format
               will be used on all traces,  unless another OTDR format is agreed
               to by both  Parties.  Launch  reels will not be used for the span
               OTDR traces.

          3.3  All testing will be conducted at [ * * * ] nm only.

          3.4  OTDR traces shall be saved in a standard file naming  convention.
               As an  example,  DENCOS15.014  will be used as the  file  name to
               indicate  the OTDR trace is taken  from the Denver  (DEN) site to
               the Colorado  Springs  (COS) site at [ * * * ] nm on fiber number
               14.

          3.5  One set of  diskettes  with all  traces  and three  copies of all
               paper documentation will be submitted.

     4.   The splicing standards are as follows:

                                       45


NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

          4.1  The  objective  loss value of the  connector  and its  associated
               splice will be [ * * * ] dB or less.  This value does not include
               the insertion loss from its connection to the FDP.

          4.2  The  objective  for each fiber  within a span shall be an average
               bi-directional  loss of [ * * * ] dB or less for each splice. For
               example, if a given span has 10 splices,  each fiber shall have a
               total bi-directional loss (due to the 10 splices) of [ * * * ] dB
               or less.  Individual  bi-directional  loss values for each splice
               will be  reviewed  for high  losses,  which may  indicate  splice
               instability.

          4.3  The  aforementioned  standards are objectives,  not the basis for
               acceptance.  The  acceptance  standard for each fiber shall be an
               average bi-directional  installed loss of [ * * * ] dB/km or less
               across each span.

     5.   All connector  splices will be protected  with heat shrinks.  Backbone
          splices  may be stored  in trays  with bare  fiber  manifolds  and RTV
          silicone protection. In no cases will more than 24 fibers be stored in
          any single tray.  Buffer  tubes/ribbons  will not be split across more
          than one splice tray.  An  industry-accepted  non-encapsulated  splice
          enclosure  will be used on all splices (like PLP Coyote,  Lucent 2600,
          or 3M 2178).

     6.   The entire fiber optic cable system shall be properly  protected  from
          foreign voltage and grounded with an industry-accepted system.

     7.   Connectors shall be Ultra FC-PC with conventional single mode glass.





                                       46





NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

                                    EXHIBIT E

                           FIBER OPTIC SPECIFICATIONS
                           --------------------------

     1.   The fiber optic cable shall be single  armor in design.  The cable may
          be either  loose tube or central  core in  construction.  The  central
          strength member shall be dielectric.  Each buffer tube or ribbon shall
          contain 12 fibers.

     2.   The  glass  within  the fiber  optic  cable  shall be either  Standard
          Single-Mode or Non-Zero Dispersion-Shifted, maximized for operation in
          the broadest wavelength ranges.

     3.   All  connectors  shall be  either  Ultra  FC-PC or SC-PC  unless  both
          Parties agree to another type.

     4.   Additional  manufacturers  specifications  for [ * * * ] and [ * * * ]
          are attached.



                                       47





NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

                                    EXHIBIT F


                   SPECIFICATIONS FOR REGENERATION FACILITIES
                   ------------------------------------------


     1.   General.
          --------
          The  sites  will be  designed  to  accommodate  shared  use  and  high
          security.  Sites  have been  selected  that are  secure  from  natural
          disasters  where  possible.  The  intent  of  the  span  design  is to
          accommodate either Standard Single Mode Fiber, or Non-Zero  Dispersion
          Shifted Fiber.

     2.   Site Spacing.
          ------------
          Span  spacing  will be the  minimum  to allow  optical  amplification,
          regeneration, or wavelength division multiplexing. Spacing shall be at
          approximately forty-five (45) mile intervals,  except where geographic
          factors require shorter spacing.

     3.   Site Power.
          -----------
          (a)  Building shall be constructed of concrete (or similar) with steel
               doors.
          (b)  Sites will be accessible with four-wheel  drive vehicles,  if not
               paved.
          (c)  Site will be fenced and topped with wire for security.
          (d)  Sites will have "meet me" vault(s) that allow for the  connection
               of IRU fibers to other fibers outside the network.
          (e)  Typical compound  measurements will be by mutual agreement of the
               Parties  on a case by  case  basis,  but in no  event  shall  the
               Purchaser's floor space be less than [ * * * ]





                                       48




                                    EXHIBIT G

                         AS-BUILT DRAWING SPECIFICATIONS
                         -------------------------------

         As-built drawings will contain a minimum of the following:

         (i)   Information  showing the  location of running  line,  relative to
               permanent  landmarks,  including  but not  limited  to,  railroad
               mileposts, boundary crossings and utility crossings.

         (ii)  Splice locations.

         (iii) Manhole/handhole locations.

         (iv)  Conduit information (type, length, expansion joints, etc.).

         (v)   Cable  information  (manufacturer,  type of cable,  reel numbers,
               sequentials  at all  handholes/manholes,  amount of cable  slack,
               etc.).

         (vi)  Notation of all deviations from specifications (depth, etc.).

         (vii) ROW detail (type,  centerline distances,  boundaries,  waterways,
               road crossings, known utilities and obstacles, etc.).

         (viii) Cable marker locations and stationing.

         (ix)  Construction   of   facilities   will   be   documented   on  the
               sitework/facility   as-builts  and  maintained  on  file  at  the
               facility.

         (x)   As-builts  will be  provided  in both  hard  copy and  electronic
               format (Auto-CAD Release 13.0 or later).



                                       49




                                    EXHIBIT H

                    MAINTENANCE SPECIFICATIONS AND PROCEDURES
                    -----------------------------------------
Any  Party  responsible  for  providing  maintenance  of  the  System  including
Purchaser  System  (collectively  the "System")  hereunder  shall be referred to
herein as the "Service Provider".  The Party receiving maintenance services from
the Service  Provider  hereunder  shall be  referred  to herein as the  "Service
Recipient".  All other capitalized terms not otherwise defined herein shall have
their  respective  meanings as set forth in the  Agreement of which this Exhibit
forms a part.

          1.   Maintenance.
               ------------
          (a)  Routine  maintenance  and repair of the System  described in this
               Section ("Scheduled  Maintenance") shall be performed by or under
               the  direction  of  Service  Provider,   at  Service   Provider's
               reasonable   discretion  or  at  Service   Recipient's   request.
               Scheduled  Maintenance  shall commence upon the Effective Date of
               the Agreement.  Scheduled Maintenance shall include the following
               activities:

               (i)  Patrol of System route on a regularly scheduled basis, which
                    will be weekly unless  hyrail access is necessary,  in which
                    case, it will be quarterly;

               (ii) Maintenance  of  a  "Call-Before-You-Dig"  program  and  all
                    required and related cable locates;

               (iii)Maintenance  of sign  posts  along the  System  right-of-way
                    with  the   number   of  the   local   "Call-Before-You-Dig"
                    organization; and

               (iv) Assignment of fiber maintenance employees to locations along
                    the   System   at   intervals    dependent   upon   terrain,
                    accessibility,  locate ticket volume,  etc. Service Provider
                    shall decide the staffing of fiber maintenance employees for
                    the System.

          (b)  Non-routine  maintenance  and repair of the  System  which is not
               included as Scheduled  Maintenance  ("Unscheduled  Maintenance"),
               shall be performed by or under the direction of Service Provider.
               Unscheduled Maintenance shall commence upon the Effective Date of
               the Agreement. Unscheduled Maintenance shall consist of:

               (i)  "Emergency Unscheduled  Maintenance" in response to an alarm
                    identification  by  Service  Provider's  Operations  Center,
                    notification  by Service  Recipient or  notification  by any
                    third party of any failure,  interruption  or  impairment in
                    the operation of the System,  or any

                                       50


NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

                    event imminently  likely to cause the failure,  interruption
                    or impairment in the operation of the System.

               (ii) "Non-Emergency  Unscheduled  Maintenance" in response to any
                    potential   service-affecting   situation   to  prevent  any
                    failure,  interruption or impairment in the operation of the
                    System.

          Service  Recipient shall  immediately  report the need for Unscheduled
          Maintenance  to  Service   Provider  in  accordance   with  procedures
          promulgated by Service  Provider from time to time.  Service  Provider
          will log the time of Service  Recipient's  report,  verify the problem
          and dispatch personnel immediately to take corrective action.

          2.   Operations Center. 
               ------------------

          Service  Provider  shall  operate and  maintain an  Operations  Center
          ("OC")  capable of receiving  System alarms  twenty-four  (24) hours a
          day, seven (7) days a week. Service Provider's  maintenance  employees
          shall be available for dispatch  twenty-four  (24) hours a day,  seven
          (7) days a week.  Service  Provider  shall have its first  maintenance
          employee  at the  site  requiring  Emergency  Unscheduled  Maintenance
          activity  within [ * * * ] after  the time  Service  Provider  becomes
          aware of an event requiring Emergency Unscheduled Maintenance,  unless
          delayed  by  circumstances  beyond the  reasonable  control of Service
          Provider. Service Provider shall maintain a toll-free telephone number
          to contact personnel at the OC. Service  Provider's OC personnel shall
          dispatch  maintenance  and  repair  personnel  to  handle  and  repair
          problems detected in the System.


                    (i)  Through the  Service  Recipient's  remote  surveillance
                         equipment and upon notification by Service Recipient to
                         Service Provider; or

                    (ii) Upon notification by a third party.

          3.   Cooperation and Coordination.
               -----------------------------

               (a)  Service  Recipient  and Service  Provider  shall  utilize an
                    Escalation List, as updated from time to time, to report and
                    seek immediate  initial  redress of exceptions  noted in the
                    performance  of  Service  Provider  in  meeting  maintenance
                    service objectives.

               (b)  Service Provider will, as necessary,  arrange for unescorted
                    access  for  Service  Provider  to all sites of the  System,
                    subject to applicable contractual,  underlying real property
                    and other third party limitations and restrictions.

               (c)  In performing its services hereunder, Service Provider shall
                    take  workmanlike  care to prevent  impairment to the signal
                    continuity and

                                       51


NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

                    performance  of the System.  The  precautions to be taken by
                    Service  Provider  shall  include  notifications  to Service
                    Recipient.  In addition,  Service  Provider shall reasonably
                    cooperate with Service Recipient in sharing  information and
                    analyzing  the  disturbances   regarding  the  cable  and/or
                    fibers.  In the  event  that any  Scheduled  or  Unscheduled
                    Maintenance   hereunder   requires   a   traffic   roll   or
                    reconfiguration    involving   cable,   fiber,    electronic
                    equipment,  or  regeneration  or  other  facilities  of  the
                    Service Recipient,  then Service Recipient shall, at Service
                    Provider's   reasonable  request,  make  such  personnel  of
                    Service Recipient  available as may be necessary in order to
                    accomplish   such   maintenance,   which   personnel   shall
                    coordinate and cooperate with Service Provider in performing
                    such maintenance as required of Service Provider hereunder.

               (d)  Service  Provider  shall notify  Service  Recipient at least
                    five (5) business days prior to the date in connection  with
                    any Maintenance Window (MW) of any Scheduled Maintenance and
                    as soon as  possible  after  becoming  aware of the need for
                    Unscheduled  Maintenance.  Service  Recipient shall have the
                    right to be present during the  performance of any Scheduled
                    Maintenance  or  Unscheduled  Maintenance  so  long  as this
                    requirement  does  not  interfere  with  Service  Provider's
                    ability to perform its obligations under this Agreement.  In
                    the event that Scheduled  Maintenance is canceled or delayed
                    for whatever reason as previously notified, Service Provider
                    shall  notify  Service   Recipient  at  Service   Provider's
                    earliest opportunity, and will comply with the provisions of
                    this Section.

          4.   Facilities.
               -----------

               (a)  Service  Provider  shall  maintain  the  System in a manner,
                    which will permit Service Recipient's use in accordance with
                    the  Marketing   Agreement.   All  common   systems   within
                    facilities   along  the  System  shall  be   maintained   in
                    accordance with  manufacturer's  specifications,  to include
                    battery plants, generators, and HVAC units.

               (b)  Except to the extent  otherwise  expressly  provided  in the
                    Agreement,  Service Recipient will be solely responsible for
                    providing and paying for any and all  maintenance of [ * * *
                    ] none of which is included in the  maintenance  services to
                    be provided hereunder.



                                       52


NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

          5.   Fiber Optic Cable/Fibers.
               -------------------------

               (a)  Service   Provider  shall  perform   appropriate   Scheduled
                    Maintenance on the fiber optic cable contained in the System
                    in   accordance   with  Service   Provider's   then  current
                    preventative  maintenance procedures as agreed to by Service
                    Recipient,   which  shall  not  substantially  deviate  from
                    standard industry practice.

               (b)  Service  Provider  shall have qualified  representatives  on
                    site  any  time  Service  Provider  has  reasonable  advance
                    knowledge  that  another  person or entity  is  engaging  in
                    construction activities or otherwise digging within five (5)
                    feet of the System.

               (c)  Service  Provider  shall maintain  sufficient  capability to
                    teleconference  with Service  Recipient  during an Emergency
                    Unscheduled   Maintenance   in  order  to  provide   regular
                    communications   during  the   restoration   process.   When
                    correcting or repairing fiber optic cable  discontinuity  or
                    damage,  including  but  not  limited  to in  the  event  of
                    Emergency  Unscheduled  Maintenance,  Service Provider shall
                    use best efforts to repair  traffic-affecting  discontinuity
                    within  [ * * * ] after  the  Service  Provider  maintenance
                    employee's   arrival  at  the  problem  site.  In  order  to
                    accomplish  such  objective,  it is  acknowledged  that  the
                    repairs so  effected  may be  temporary  in nature.  In such
                    event, within twenty-four (24) hours after completion of any
                    such Emergency  Unscheduled  Maintenance,  Service  Provider
                    shall  commence  its  planning  for  permanent  repair,  and
                    thereafter  promptly shall notify Service  Recipient of such
                    plans,  and shall implement such permanent  repair within an
                    appropriate time  thereafter.  Restoration of open fibers on
                    fiber strands not immediately  required for service shall be
                    completed on a mutually agreed-upon  schedule.  If the fiber
                    is  required  for  immediate  service,  the repair  shall be
                    scheduled for the next available Maintenance Window (MW).

               (d)  In performing  repairs,  Service  Provider shall comply with
                    the  splicing  specifications  as set  forth in  Exhibit  H.
                    Service  Provider  shall  provide to Service  Recipient  any
                    modifications to these specifications as may be necessary or
                    appropriate   in  any   particular   instance   for  Service
                    Recipient's   approval,   which   approval   shall   not  be
                    unreasonably withheld.

               (e)  Service Provider's  representatives that are responsible for
                    initial  restoration  of a cut fiber optic cable shall carry
                    on their  vehicles the typical  appropriate  equipment  that
                    would  enable a  temporary  splice,  with the  objective  of
                    restoring   operating   capability  in  as  little  time  as
                    possible.  Service  Provider  shall  maintain  and supply an
                    inventory of spare fiber optic cable in storage

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NOTE: CERTAIN MATERIAL HAS BEEN OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAS BEEN FILED SEPARATELY WITH THE SEC. NOTATIONS
OF [ * * * ] HAVE BEEN USED TO INDICATE SUCH AN OMISSION.

                    facilities  supplied and  maintained by Service  Provider at
                    strategic locations to facilitate timely restoration.

          6.   Maintenance Window (MW).
               ------------------------
              
 Scheduled  Maintenance,  which is reasonably  expected to produce
               any  signal  discontinuity,   must  be  coordinated  between  the
               Parties. Generally, this work should be scheduled after 6:00 p.m.
               and before 6:00 a.m. local time. Major system work, such as fiber
               rolls and hot cuts,  will be scheduled  for MW weekends and shall
               allow work  during  daylight  hours if on a  Saturday  or Sunday.
               Service  Provider  and  Service  Recipient  will  agree upon a MW
               calendar.  The intent is to avoid  jeopardy work on  high-traffic
               holidays.

         7.    Subcontracting.
               ---------------

               Service Provider may subcontract any of the maintenance  services
               hereunder;  provided  that  Service  Provider  shall  require the
               subcontractor  (s) to perform in accordance with the requirements
               and   procedures   set  forth   herein.   The  use  of  any  such
               subcontractor  shall not relieve  Service  Provider of any of its
               obligations hereunder.

          8.   Fees and Costs.
               ---------------

               Each  Party  agrees  to  pay [ * * * ] of the  total  maintenance
               costs,  including  without  limitation,  taxes required under the
               Agreement.





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                                    EXHIBIT I

                                  BILL OF SALE
                                  ------------

         KNOW  ALL  PERSONS  BY THESE  PRESENTS  that,  for  good  and  valuable
consideration,  the receipt and sufficiency of which is hereby  acknowledged and
upon  acceptance  of the Purchaser  System  pursuant to Section 10.2 by PATHNET,
INC., a Delaware corporation,  ("Buyer"),  PACIFIC FIBER LINK, LLC, a Washington
limited liability company ("Seller") does hereby grant,  bargain,  sell, assign,
transfer,  convey  and set over unto  Buyer all  right,  title and  interest  in
_____________   (___)  _____  inch  (__")  inside   diameter  HDPE  conduit  and
_____________________  (__) _________________ fibers, together with the right to
use all handholes and other associated  improvements as related to the Purchaser
System, installed as described in Schedule A (the "Purchaser System"). The title
to all handholes and other associated improvements shall remain with the Seller.

         Seller hereby warrants to Buyer that immediately  prior to the delivery
of this  Bill of Sale,  Seller  was the owner of the full  legal and  beneficial
title to the  Purchaser  System and that Seller had the good and lawful right to
sell the same and that  good and  marketable  title to the  Purchaser  System is
hereby  vested in Buyer free and clear of all taxes  (except all  sales/purchase
taxes  incurred or assessed by any  governmental  agency in connection  with the
purchase of the Purchaser System), liens, claims, mortgages, security interests,
encumbrances and right of others. Seller agrees to warrant and defend such title
forever,  at its expense,  against the claims of third  parties,  including  the
manufacturers,   vendors,  contractors  and  subcontractors  from  which  Seller
acquired  the  Purchaser  System or  components  thereof,  but  excluding  those
manufacturers  and  vendors  of  material  supplied  by  Purchaser,  if any  and
installed in the Purchaser System.

         IN WITNESS WHEREOF, Seller has caused this Bill of Sale to be  executed
and  delivered  in its name this _____ day of ______.  199___,  at  Westminster,
Colorado.


                         PACIFIC FIBER LINK, LLC, a Washington limited liability
                         company


                         By: ______________________________________





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