Exhibit 4.17

                                                           
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                            REGISTRATION RIGHTS AGREEMENT





                                 Dated March 11, 1997





                                       between



                                  ICG HOLDINGS, INC.




                                         and



                          MORGAN STANLEY & CO. INCORPORATED




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                            REGISTRATION RIGHTS AGREEMENT



                    THIS REGISTRATION RIGHTS AGREEMENT (the "Agreement") is
          made and entered into March 11, 1997, between ICG HOLDINGS, INC.,
          a Colorado corporation ("Holdings"), and MORGAN STANLEY & CO.
          INCORPORATED (the "Placement Agent").

                    This Agreement is made pursuant to the Placement
          Agreement dated March 6, 1997, among Holdings, ICG and the
          Placement Agent (the "Placement Agreement"), which provides for
          the sale by Holdings and ICG to the Placement Agent of
          (i) 100,000 shares of Holdings' 14% Exchangeable Preferred Stock,
          which will be mandatorily redeemable in 2008 (the "Shares"), as
          set forth in the Second Amended and Restated Articles of
          Incorporation of Holdings (the "Amended Articles"), and will be
          exchangeable, at the option of Holdings, in whole but not in
          part, into Senior Subordinated Exchange Debentures due 2008 (the
          "Exchange Debentures") to be issued, if applicable, pursuant to
          an Indenture to be dated as of the date of such exchange (the
          "Exchange Indenture") and (ii) $176,000,000 million aggregate
          principal amount at maturity of 11 5/8% Senior Discount Notes due
          2007 of Holdings (the "Notes") issued pursuant to the provisions
          of an Indenture to be dated as of the date hereof (the
          "Indenture") among Holdings, ICG and Norwest Bank Colorado,
          National Association, as trustee.  The obligations of Holdings
          under the Notes and the Indenture, and under the Exchange
          Debentures and the Exchange Indenture when issued, will be
          guaranteed by ICG on a senior unsecured basis and a senior
          subordinated unsecured basis, respectively, pursuant to the terms
          of the Indenture and the Exchange Indenture, respectively.  In
          order to induce the Placement Agent to enter into the Placement
          Agreement, Holdings has agreed to provide to the Placement Agent
          and its direct and indirect transferees the registration rights
          with respect to the Shares set forth in this Agreement.  The
          execution of this Agreement is a condition to the closing under
          the Placement Agreement.

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

                    1.   Definitions.
                         -----------

                    As used in this Agreement, the following capitalized
          defined terms shall have the following meanings:

                    "1933 Act" 
                    ---------      shall mean the Securities Act of 1933,
               as amended from time to time.

                    "1934 Act" 
                     --------      shall mean the Securities Exchange Act
               of 1934, as amended from time to time.

                    "Amended Articles" 
                    -----------------   shall have the meaning set forth in
               the preamble.

                    "Closing Date" 
                     ------------  shall mean the Closing Date as defined
               in the Placement Agreement.

                    "Exchange Debentures" 
                     -------------------     shall have the meaning set
               forth in the preamble.

                    "Exchange Indenture" 
                     ------------------ shall have the meaning set forth in
               the preamble.
           
                    "Exchange Offer" 
                     ---------------    shall mean the exchange offer by
               Holdings of Exchange Shares for Registrable Shares pursuant
               to Section 2(a) hereof.

                    "Exchange Offer Registration" 
                     ---------------------------  shall mean a registration
               under the 1933 Act effected pursuant to Section 2(a) hereof.

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

                    "Exchange Shares" 
                     ---------------    shall mean securities issued by
               Holdings containing terms identical to the Shares (except
               that such Exchange Shares shall bear no legend and shall be
               free from restrictions on transfers), to be offered to
               Holders of Shares in exchange for Shares pursuant to the
               Exchange Offer.

                    "Holder" 
                     ------   shall mean the Placement Agent, for so long
               as it owns any Registrable Shares, and each of its
               successors, assigns and direct and indirect transferees who
               become registered owners of Registrable Shares under the
               Amended Articles; provided that for purposes of Sections 4 
                                 --------  and 5 of this Agreement, the
               term "Holder" shall include Participating Broker-Dealers (as
               defined in Section 4(a)).

                    "Holdings" 
                     -------- shall have the meaning set forth in the
               preamble and shall also include Holdings' successors.

                    "ICG" 
                     ----     shall mean ICG Communications, Inc., a
               Delaware corporation and its successors.

                    "Majority Holders" 
                     ----------------   shall mean the Holders of a
               majority of the aggregate liquidation preference of
               outstanding Registrable Shares; provided that whenever the
                                               -------- consent or approval
               of Holders of a specified percentage of Registrable Shares
               is required hereunder, Registrable Shares held by Holdings
               or any of its affiliates (as such term is defined in Rule
               405 under the 1933 Act) (other than the Placement Agent or
               subsequent holders of Registrable Shares if such subsequent
               holders are deemed to be such affiliates solely by reason of
               their holding of such Registrable Shares) shall not be
               counted in determining whether such consent or approval was
               given by the Holders of such required percentage or amount.

                    "Person" 
                     ------   shall mean an individual, partnership,
               corporation, trust or unincorporated organization, or a
               government or agency or political subdivision thereof.

                    "Placement Agent" 
                     ---------------    shall have the meaning set forth in
               the preamble.

                    "Placement Agreement" 
                     -------------------     shall have the meaning set
               forth in the preamble.

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

                    "Registrable Shares" 
                     ------------------ shall mean the Shares, including
               any additional Shares paid as dividends; provided, however,
                                                        --------  -------
               that the Shares shall cease to be Registrable Shares (i)
               when a Registration Statement with respect to such Shares
               shall have been declared effective under the 1933 Act and
               such Shares shall have been disposed of pursuant to such
               Registration Statement, (ii) when such Shares have been sold
               to the public pursuant to Rule 144(k) (or any similar
               provision then in force, but not Rule 144A) under the 1933
               Act or (iii) when such Shares shall have ceased to be
               outstanding.

                    "Registration Expenses" 
                     ---------------------   shall mean any and all
               expenses incident to performance of or compliance by
               Holdings with this Agreement, including without limitation: 
               (i) all SEC, stock exchange or National Association of
               Securities Dealers, Inc. registration and filing fees, (ii)
               all fees and expenses incurred in connection with compliance
               with state securities or blue sky laws (including reasonable
               fees and disbursements of counsel for any Underwriters or
               Holders in connection with blue sky qualification of any of
               the Exchange Shares or Registrable Shares), (iii) all
               expenses of any Persons in preparing or assisting in
               preparing, word processing, printing and distributing any
               Registration Statement, any Prospectus, any amendments or
               supplements thereto, any underwriting agreements, securities
               sales agreements and other documents relating to the
               performance of and compliance with this Agreement, (iv) all
               rating agency fees, if any, (v) the fees and disbursements
               of counsel for Holdings and, in the case of a Shelf
               Registration Statement, the fees and disbursements of one
               counsel for the Holders (which counsel shall be selected by
               the Majority Holders and which counsel may also be counsel
               for the Placement Agent) and (vi) the fees and disbursements
               of the independent public accountants of Holdings, including
               the expenses of any special audits or "cold comfort" letters
               required by or incident to such performance and compliance,
               but excluding fees and expenses of counsel to the
               Underwriters (other than fees and expenses set forth in
               clause (ii) above) or the Holders and underwriting discounts
               and commissions and transfer taxes, if any, relating to the
               sale or disposition of Registrable Shares by a Holder.

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

                    "SEC" 
                     --- shall mean the Securities and Exchange Commission.

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

                    "Shelf Registration Statement" 
                     ---------------------------- shall mean a "shelf"
               registration statement of Holdings pursuant to the
               provisions of Section 2(b) of this Agreement which covers
               all of the Registrable Shares on an appropriate form under
               Rule 415 under the 1933 Act, or any similar rule that may be
               adopted by the SEC, and all amendments and supplements to
               such registration statement, including post-effective
               amendments, in each case including the Prospectus contained
               therein, all exhibits thereto and all material incorporated
               by reference therein.

                    "Transfer Agent" 
                     --------------     shall mean American Stock Transfer
               and Trust Company.

                    "Trustee" 
                     -------  shall mean the trustee with respect to the
               Exchange Debentures  under the Exchange Indenture.

                    "Underwriters" 
                     ------------  shall have the meaning set forth in
               Section 3 hereof.

                    "Underwritten Registration" or "Underwritten Offering"
                     -------------------------      -------------------
               shall mean a registered offering in which Registrable Shares
               are sold to an Underwriter for reoffering to the public.

                    2.   Registration Under the 1933 Act.
                         -------------------------------

                    (a)  To the extent not prohibited by any applicable law
          or applicable interpretation of the Staff of the SEC, Holdings
          shall cause to be filed an Exchange Offer Registration Statement
          covering the offer by Holdings to the Holders to exchange all of
          the Registrable Shares for Exchange Shares, to have such
          Registration Statement declared effective by the SEC and remain
          effective until the closing of the Exchange Offer and to
          consummate the Exchange Offer on or prior to September 11, 1997. 
          Holdings shall commence the Exchange Offer promptly after the
          Exchange Offer Registration Statement has been declared effective
          by the SEC and use its best efforts to have the Exchange Offer
          consummated on or prior to September 11, 1997.  Holdings shall
          commence the Exchange Offer by mailing the related exchange offer
          Prospectus and accompanying documents to each Holder stating, in
          addition to such other disclosures as are required by applicable
          law:

                    (i)  that the Exchange Offer is being made pursuant to
               this Agreement and that all Registrable Shares validly
               tendered will be accepted for exchange;

                    (ii) the dates of acceptance for exchange (which shall
               be a period of at least 30 days from the date such notice is
               mailed) (the "Exchange Dates");

                    (iii)     that any Registrable Shares not tendered will
               remain outstanding and shall accumulate dividends at the
               initial rate borne by the Registrable Shares and, other than
               Registrable Shares referred to in Section 2(b)(iii) below,
               will not retain any rights under this Agreement;

                    (iv) that Holders electing to have Registrable Shares
               exchanged pursuant to the Exchange Offer will be required to
               surrender such Registrable Shares, together with the
               enclosed letters of transmittal, to the institution and at
               the address (located in the Borough of Manhattan, The City
               of New York) specified in the notice prior to the close of
               business on the last Exchange Date; and

                    (v)  that Holders will be entitled to withdraw its
               election, not later than the close of business on the last
               Exchange Date, by sending to the institution and at the
               address (located in the Borough of Manhattan, The City of
               New York) specified in the notice a telegram, telex,
               facsimile transmission or letter setting forth the name of
               such Holder, the principal amount of Registrable Shares
               delivered for exchange and a statement that such Holder is
               withdrawing his election to have such Registrable Shares
               exchanged.

                    As soon as practicable after the last Exchange Date,
          Holdings shall:

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

                    (ii) deliver, or cause to be delivered, to the Transfer
               Agent for cancellation all Registrable Shares or portions
               thereof so accepted for exchange by Holdings and issue, and
               cause the Transfer Agent to promptly authenticate and mail
               to each Holder, an Exchange Share equal in principal amount
               to the principal amount of the Registrable Shares
               surrendered by such Holder.

          Holdings shall use its best efforts to complete the Exchange
          Offer as provided above and shall comply with the applicable
          requirements of the 1933 Act, the 1934 Act and other applicable
          laws and regulations in connection with the Exchange Offer.  The
          Exchange Offer shall not be subject to any conditions, other than
          that the Exchange Offer does not violate applicable law or any
          applicable interpretation of the Staff of the SEC.  Holdings
          shall inform the Placement Agent of the names and addresses of
          the Holders to whom the Exchange Offer is made, and the Placement
          Agent shall have the right, subject to applicable law, to contact
          such Holders and otherwise facilitate the tender of Registrable
          Shares in the Exchange Offer.

                    (b)  In the event that (i) Holdings determines that the
          Exchange Offer Registration provided for in Section 2(a) above is
          not available or may not be consummated as soon as practicable
          after the last Exchange Date because it would violate applicable
          law or the applicable interpretations of the Staff of the SEC,
          (ii) the Exchange Offer is not for any other reason consummated
          on or prior to September 11, 1997 or (iii) in the opinion of
          counsel for the Placement Agent a Registration Statement must be
          filed and a Prospectus must be delivered by the Placement Agent
          in connection with any offering or sale of Registrable Shares,
          Holdings shall use its best efforts to cause to be filed as soon
          as practicable after such determination, date or notice of such
          opinion of counsel is given to Holdings, a Shelf Registration
          Statement providing for the sale by the Holders of all of the
          Registrable Shares and to have such Shelf Registration Statement
          declared effective by the SEC.  In the event Holdings is required
          to file a Shelf Registration Statement solely as a result of the
          matters referred to in clause (iii) of the preceding sentence,
          Holdings shall file and have declared effective by the SEC both
          an Exchange Offer Registration Statement pursuant to Section 2(a)
          with respect to all Registrable Shares and a Shelf Registration
          Statement (which may be a combined Registration Statement with
          the Exchange Offer Registration Statement) with respect to offers
          and sales of Registrable Shares held by the Placement Agent after
          completion of the Exchange Offer.  Holdings agrees to use its
          best efforts to keep the Shelf Registration Statement
          continuously effective until the period referred to in Rule
          144(k) or until all of the Registrable Shares covered by the
          Shelf Registration Statement have been sold pursuant to the Shelf
          Registration Statement.  Holdings further agrees to supplement or
          amend the Shelf Registration Statement if required by the rules,
          regulations or instructions applicable to the registration form
          used by Holdings for such Shelf Registration Statement or by the
          1933 Act or by any other rules and regulations thereunder for
          shelf registration or if reasonably requested by a Holder with
          respect to information relating to such Holder, and to use its
          best efforts to cause any such amendment to become effective and
          such Shelf Registration Statement to become usable as soon as
          practicable thereafter.  Holdings agrees to furnish to the
          Holders of Registrable Shares copies of any such supplement or
          amendment promptly after its being used or filed with the SEC.

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

                    (d)  An Exchange Offer Registration Statement pursuant
          to Section 2(a) hereof or a Shelf Registration Statement pursuant
          to Section 2(b) hereof will not be deemed to have become
          effective unless it has been declared effective by the SEC;
          provided, however, that if, after it has been declared effective,
          --------  ------- the offering of Registrable Shares pursuant to
          a Shelf Registration Statement is interfered with by any stop
          order, injunction or other order or requirement of the SEC or any
          other governmental agency or court, such Registration Statement
          will be deemed not to have become effective during the period of
          such interference until the offering of Registrable Shares
          pursuant to such Registration Statement may legally resume.  As
          provided for in the Amended Articles, in the event the Exchange
          Offer is not consummated and the Shelf Registration Statement is
          not declared effective on or prior to September 11, 1997,
          dividends will accrue, at an annual rate of 0.5% of the
          liquidation preference thereof, on the Shares from September 11,
          1997, payable in additional Shares quarterly in arrears on each
          March 15, June 15, September 15 and December 15, commencing
          December 15, 1997; provided that if a Shelf Registration 
                             -------- Statement is required solely as a
          result of the matters referred to in clause (iii) of the first
          sentence of Section 2(b), such increase in dividends shall be
          payable only to the Placement Agent, with respect to Shares held
          by it, and only with respect to any period (after September 11,
          1997) during which such Shelf Registration Statement is not
          effective.

                    (e)  Without limiting the remedies available to the
          Placement Agent and the Holders, Holdings acknowledges that any
          failure by Holdings to comply with its obligations under
          Section 2(a) and Section 2(b) hereof may result in material
          irreparable injury to the Placement Agent or the Holders for
          which there is no adequate remedy at law, that it will not be
          possible to measure damages for such injuries precisely and that,
          in the event of any such failure, the Placement Agent or any
          Holder may obtain such relief as may be required to specifically
          enforce Holdings' obligations under Section 2(a) and Section 2(b)
          hereof.

                    3.   Registration Procedures.
                         ------------------------

                    In connection with the obligations of Holdings with
          respect to the Registration Statements pursuant to Section 2(a)
          and Section 2(b) hereof, Holdings shall as expeditiously as
          possible:

                    (a)  prepare and file with the SEC a Registration
               Statement on the appropriate form under the 1933 Act, which
               form (x) shall be selected by Holdings and (y) shall, in the
               case of a Shelf Registration, be available for the sale of
               the Registrable Shares by the selling Holders thereof and
               (z) shall comply as to form in all material respects with
               the requirements of the applicable form and include all
               financial statements required by the SEC to be filed
               therewith, and use its best efforts to cause such
               Registration Statement to become effective and remain
               effective in accordance with Section 2 hereof;

                    (b)  prepare and file with the SEC such amendments and
               post-effective amendments to each Registration Statement as
               may be necessary to keep such Registration Statement
               effective for the applicable period and cause each
               Prospectus to be supplemented by any required prospectus
               supplement and, as so supplemented, to be filed pursuant to
               Rule 424 under the 1933 Act; to keep each Prospectus current
               during the period described under Section 4(3) and Rule 174
               under the 1933 Act that is applicable to transactions by
               brokers or dealers with respect to the Registrable Shares or
               Exchange Shares;

                    (c)  in the case of a Shelf Registration, furnish to
               each Holder of Registrable Shares, to counsel for the
               Placement Agent, to counsel for the Holders and to each
               Underwriter of an Underwritten Offering of Registrable
               Shares, if any, without charge, as many copies of each
               Prospectus, including each preliminary Prospectus, and any
               amendment or supplement thereto and such other documents as
               such Holder or Underwriter may reasonably request, in order
               to facilitate the public sale or other disposition of the
               Registrable Shares; and Holdings consents to the use of such
               Prospectus and any amendment or supplement thereto in
               accordance with applicable law by each of the selling
               Holders of Registrable Shares and any such Underwriters in
               connection with the offering and sale of the Registrable
               Shares covered by and in the manner described in such
               Prospectus or any amendment or supplement thereto in
               accordance with applicable law;

                    (d)  use its best efforts to register or qualify, by
               the time the applicable Registration Statement is declared
               effective by the SEC, the Registrable Shares under all
               applicable state securities or "blue sky" laws of such
               jurisdictions as any Holder of Registrable Shares covered by
               a Registration Statement shall reasonably request in
               writing, to cooperate with such Holder in connection with
               any filings required to be made with the National
               Association of Securities Dealers, Inc. and do any and all
               other acts and things which may be reasonably necessary or
               advisable to enable such Holder to consummate the
               disposition in each such jurisdiction of such Registrable
               Shares owned by such Holder; provided, however, that
                                            --------  ------- Holdings
               shall not be required to (i) qualify as a foreign
               corporation or as a dealer in securities in any jurisdiction
               where it would not otherwise be required to qualify but for
               this Section 3(d), (ii) file any general consent to service
               of process or (iii) subject itself to taxation in any such
               jurisdiction if it is not otherwise so subject;

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

                    (f)  make every reasonable effort to obtain the
               withdrawal of any order suspending the effectiveness of a
               Registration Statement at the earliest possible moment and
               provide immediate notice to each Holder of the withdrawal of
               any such order;

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

                    (h)  in the case of a Shelf Registration, cooperate
               with the selling Holders of Registrable Shares to facilitate
               the timely preparation and delivery of certificates
               representing Registrable Shares to be sold and not bearing
               any restrictive legends and enable such Registrable Shares
               to be in such denominations (consistent with the provisions
               of the Amended Articles) and registered in such names as the
               selling Holders may reasonably request at least two business
               days prior to the closing of any sale of Registrable Shares;

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

                    (j)  within a reasonable time prior to the filing of
               any Registration Statement, any Prospectus, any amendment to
               a Registration Statement or amendment or supplement to a
               Prospectus or any document which is to be incorporated by
               reference into a Registration Statement or a Prospectus
               after initial filing of a Registration Statement, provide
               copies of such document to the Placement Agent and its
               counsel (and, in the case of a Shelf Registration Statement,
               the Holders and its counsel) and make such representatives
               of Holdings as shall be reasonably requested by the
               Placement Agent or its counsel (and, in the case of a Shelf
               Registration Statement, the Holders or its counsel)
               available for discussion of such document, and shall not at
               any time file or make any amendment to the Registration
               Statement, any Prospectus or any amendment of or supplement
               to a Registration Statement or a Prospectus or any document
               which is to be incorporated by reference into a Registration
               Statement or a Prospectus, of which the Placement Agent and
               its counsel (and, in the case of a Shelf Registration
               Statement, the Holders and its counsel) shall not have
               previously been advised and furnished a copy or to which the
               Placement Agent or its counsel (and, in the case of a Shelf
               Registration Statement, the Holders or its counsel) shall
               object, except for any amendment or supplement or document
               (a copy of which has been previously furnished to the
               Placement Agent and its counsel (and, in the case of a Shelf
               Registration Statement, the Holders and its counsel)) which
               counsel to Holdings shall advise Holdings, in the form of a
               written legal opinion, is required in order to comply with
               applicable law; the Placement Agent agrees that, if it
               receives timely notice and drafts under this clause (j), it
               will not take actions or make objections pursuant to this
               clause (j) such that Holdings is unable to comply with its
               obligations under Section 2(a);

                    (k)  obtain a CUSIP number and, if applicable, a CINS
               number, for all Exchange Shares or Registrable Shares, as
               the case may be, not later than the first effective date of
               a Registration Statement;

                    (l)  cause the Exchange Indenture to be qualified under
               the Trust Indenture Act of 1939, as amended (the "TIA"), in
               connection with the registration of the Exchange Shares or
               Registrable Shares, as the case may be, cooperate with the
               Trustee and the Holders to effect such changes to the
               Exchange Indenture as may be required for the Exchange
               Indenture to be so qualified in accordance with the terms of
               the TIA and execute, and use its best efforts to cause the
               Trustee to execute, all documents as may be required to
               effect such changes and all other forms and documents
               required to be filed with the SEC to enable the Exchange
               Indenture to be so qualified in a timely manner;

                    (m)  in the case of a Shelf Registration, make
               available for inspection by a representative of the Holders
               of the Registrable Shares, any Underwriter participating in
               any disposition pursuant to such Shelf Registration
               Statement, and attorneys and accountants designated by the
               Holders, at reasonable times and in a reasonable manner, all
               financial and other records, pertinent documents and
               properties of Holdings, and cause the officers, directors
               and employees of Holdings to supply all information
               reasonably requested by any such representative,
               Underwriter, attorney or accountant in connection with a
               Shelf Registration Statement;

                    (n)  in the case of a Shelf Registration, use its best
               efforts to cause all Registrable Shares to be listed on any
               securities exchange or any automated quotation system on
               which similar securities issued by Holdings are then listed
               if requested by the Majority Holders, to the extent such
               Registrable Shares satisfy applicable listing requirements;

                    (o)  use its best efforts to cause the Exchange Shares
               or Registrable Shares, as the case may be, to be rated by
               two nationally recognized statistical rating organizations
               (as such term is defined in Rule 436(g)(2) under the 1933
               Act);

                    (p)  if reasonably requested by any Holder of
               Registrable Shares covered by a Registration Statement, (i)
               promptly incorporate in a Prospectus supplement or post-
               effective amendment such information with respect to such
               Holder as such Holder reasonably requests to be included
               therein and (ii) make all required filings of such
               Prospectus supplement or such post-effective amendment as
               soon as Holdings has received notification of the matters to
               be incorporated in such filing; and

                    (q)  in the case of a Shelf Registration, enter into
               such customary agreements and take all such other actions in
               connection therewith (including those requested by the
               Holders of a majority of the Registrable Shares being sold)
               in order to expedite or facilitate the disposition of such
               Registrable Shares including, but not limited to, an
               Underwritten Offering and in such connection, (i) to the
               extent possible, make such representations and warranties to
               the Holders and any Underwriters of such Registrable Shares
               with respect to the business of Holdings and its
               subsidiaries, the Registration Statement, Prospectus and
               documents incorporated by reference or deemed incorporated
               by reference, if any, in each case, in form, substance and
               scope as are customarily made by issuers to underwriters in
               underwritten offerings and confirm the same if and when
               requested, (ii) obtain opinions of counsel to Holdings
               (which counsel and opinions, in form, scope and substance,
               shall be reasonably satisfactory to the Holders and such
               Underwriters and its  counsel) addressed to each selling
               Holder and Underwriter of Registrable Shares, covering the
               matters customarily covered in opinions requested in
               underwritten offerings, (iii) obtain "cold comfort" letters
               from the independent certified public accountants of
               Holdings (and, if applicable, any other certified public
               accountant of any business acquired by Holdings for which
               financial statements and financial data are or are required
               to be included in the Registration Statement) addressed to
               each selling Holder and Underwriter of Registrable Shares,
               such letters to be in customary form and covering matters of
               the type customarily covered in "cold comfort" letters in
               connection with underwritten offerings, and (iv) deliver
               such documents and certificates as may be reasonably
               requested by the Holders of a majority in principal amount
               of the Registrable Shares being sold or the Underwriters,
               and which are customarily delivered in underwritten
               offerings, to evidence the continued validity of the
               representations and warranties of Holdings made pursuant to
               clause (i) above and to evidence compliance with any
               customary conditions contained in an underwriting agreement.


                    In the case of a Shelf Registration Statement, Holdings
          may require each Holder of Registrable Shares to furnish to
          Holdings such information regarding the Holder and the proposed
          distribution by such Holder of such Registrable Shares as
          Holdings may from time to time reasonably request in writing.  

                    In the case of a Shelf Registration Statement, each
          Holder agrees that, upon receipt of any notice from Holdings of
          the happening of any event of the kind described in Section
          3(e)(v) hereof, such Holder will forthwith discontinue
          disposition of Registrable Shares pursuant to a Registration
          Statement until such Holder's receipt of the copies of the
          supplemented or amended Prospectus contemplated by Section 3(i)
          hereof, and, if so directed by Holdings, such Holder will deliver
          to Holdings (at its expense) all copies in its possession, other
          than permanent file copies then in such Holder's possession, of
          the Prospectus covering such Registrable Shares current at the
          time of receipt of such notice.  If Holdings shall give any such
          notice to suspend the disposition of Registrable Shares pursuant
          to a Registration Statement, Holdings shall extend the period
          during which the Registration Statement shall be maintained
          effective pursuant to this Agreement by the number of days during
          the period from and including the date of the giving of such
          notice to and including the date when the Holders shall have
          received copies of the supplemented or amended Prospectus
          necessary to resume such dispositions.

                    The Holders of Registrable Shares covered by a Shelf
          Registration Statement who desire to do so may sell such
          Registrable Shares in an Underwritten Offering.  In any such
          Underwritten Offering, the investment banker or investment
          bankers and manager or managers (the "Underwriters") that will
          administer the offering will be selected by the Majority Holders
          of the Registrable Shares included in such offering.

                    4.   Participation of Broker-Dealers in Exchange Offer.
                         --------------------------------------------------

                    (a)  The Staff of the SEC has taken the position that
          any broker-dealer that receives Exchange Shares for its own
          account in the Exchange Offer in exchange for Shares that were
          acquired by such broker-dealer as a result of market-making or
          other trading activities (a "Participating Broker-Dealer"), may
          be deemed to be an "underwriter" within the meaning of the 1933
          Act and must deliver a prospectus meeting the requirements of the
          1933 Act in connection with any resale of such Exchange Shares.

                    Holdings understands that it is the Staff's position
          that if the Prospectus contained in the Exchange Offer
          Registration Statement includes a plan of distribution containing
          a statement to the above effect and the means by which
          Participating Broker-Dealers may resell the Exchange Shares,
          without naming the Participating Broker-Dealers or specifying the
          amount of Exchange Shares owned by them, such Prospectus may be
          delivered by Participating Broker-Dealers to satisfy their
          prospectus delivery obligation under the 1933 Act in connection
          with resales of Exchange Shares for their own accounts, so long
          as the Prospectus otherwise meets the requirements of the 1933
          Act.

                    (b)  In light of the above, notwithstanding the other
          provisions of this Agreement, Holdings agrees that the provisions
          of this Agreement as they relate to a Shelf Registration shall
          also apply to an Exchange Offer Registration to the extent, and
          with such reasonable modifications thereto as may be, reasonably
          requested by the Placement Agent or by one or more Participating
          Broker-Dealers, in each case as provided in clause (ii) below, in
          order to expedite or facilitate the disposition of any Exchange
          Shares by Participating Broker-Dealers consistent with the
          positions of the Staff recited in Section 4(a) above; provided
                                                                --------
          that:

                    (i)  Holdings shall not be required to amend or
               supplement the Prospectus contained in the Exchange Offer
               Registration Statement, as would otherwise be contemplated
               by Section 3(i) of this Agreement, for a period exceeding 60
               days after the last Exchange Date (as such period may be
               extended pursuant to the penultimate paragraph of Section 3
               of this Agreement) and Participating Broker-Dealers shall
               not be authorized by Holdings to deliver and shall not
               deliver such Prospectus after such period in connection with
               the resales contemplated by this Section 4; and

                    (ii) the application of the Shelf Registration
               procedures set forth in Section 3 of this Agreement to an
               Exchange Offer Registration, to the extent not required by
               the positions of the Staff of the SEC or the 1933 Act and
               the rules and regulations thereunder, will be in conformity
               with the reasonable request to Holdings by the Placement
               Agent or with the reasonable request in writing to Holdings
               by one or more broker-dealers who certify to the Placement
               Agent and Holdings in writing that they anticipate that they
               will be Participating Broker-Dealers; and provided further
                                                         -------- -------
               that, in connection with such application of the Shelf
               Registration procedures set forth in Section 3 of this
               Agreement to an Exchange Offer Registration, Holdings shall
               be obligated (x) to deal only with one entity representing
               the Participating Broker-Dealers, which shall be the
               Placement Agent unless it elects not to act as such
               representative, (y) to pay the fees and expenses of only one
               counsel representing the Participating Broker-Dealers, which
               shall be counsel to the Placement Agent unless such counsel
               elects not to so act and (z) to cause to be delivered only
               one, if any, "cold comfort" letter with respect to the
               Prospectus in the form existing on the last Exchange Date
               and with respect to each subsequent amendment or supplement,
               if any, effected during the period specified in clause (i)
               above.

                    (c)  The Placement Agent shall have no liability to
          Holdings or any Holder with respect to any request that it may
          make pursuant to Section 4(b) above.

                    5.   Indemnification and Contribution.
                         --------------------------------

                    (a)  Holdings agrees to indemnify and hold harmless the
          Placement Agent, each Holder and each Person, if any, who
          controls the Placement Agent or any Holder within the meaning of
          either Section 15 of the 1933 Act or Section 20 of the 1934 Act,
          or is under common control with, or is controlled by, the
          Placement Agent or any Holder, from and against all losses,
          claims, damages and liabilities (including, without limitation,
          any legal or other expenses reasonably incurred by the Placement
          Agent, any Holder or any such controlling or affiliated Person in
          connection with defending or investigating any such action or
          claim) caused by any untrue statement or alleged untrue statement
          of a material fact contained in any Registration Statement (or
          any amendment thereto) pursuant to which Exchange Shares or
          Registrable Shares were registered under the 1933 Act, including
          all documents incorporated therein by reference, or caused by any
          omission or alleged omission to state therein a material fact
          required to be stated therein or necessary to make the statements
          therein not misleading, or caused by any untrue statement or
          alleged untrue statement of a material fact contained in any
          Prospectus (as amended or supplemented if Holdings shall have
          furnished any amendments or supplements thereto), or caused by
          any omission or alleged omission to state therein a material fact
          necessary to make the statements therein in light of the
          circumstances under which they were made not misleading, except
          insofar as such losses, claims, damages or liabilities are caused
          by any such untrue statement or omission or alleged untrue
          statement or omission based upon information relating to the
          Placement Agent or any Holder furnished to Holdings in writing by
          the Placement Agent or any selling Holder expressly for use
          therein.  In connection with any Underwritten Offering permitted
          by Section 3 of this Agreement, Holdings will also indemnify the
          Underwriters, if any, selling brokers, dealers and similar
          securities industry professionals participating in the
          distribution, their officers and directors and each Person who
          controls such Persons (within the meaning of the 1933 Act and the
          1934 Act) to the same extent as provided above with respect to
          the indemnification of the Holders, if requested in connection
          with any Registration Statement.

                    (b)  Each Holder agrees, severally and not jointly, to
          indemnify and hold harmless Holdings, the Placement Agent and the
          other selling Holders, and each of their directors, officers who
          sign the Registration Statement and each Person, if any, who
          controls Holdings, the Placement Agent and any other selling
          Holder within the meaning of either Section 15 of the 1933 Act or
          Section 20 of the 1934 Act to the same extent as the foregoing
          indemnity from Holdings to the Placement Agent and the Holders,
          but only with reference to information relating to such Holder
          furnished to Holdings in writing by such Holder expressly for use
          in any Registration Statement (or any amendment thereto) or any
          Prospectus (or any amendment or supplement thereto).

                    (c)  In case any proceeding (including any governmental
          investigation) shall be instituted involving any Person in
          respect of which indemnity may be sought pursuant to either
          paragraph (a) or paragraph (b) above, such Person (the
          "indemnified party") shall promptly notify the Person against
          whom such indemnity may be sought (the "indemnifying party") in
          writing and the indemnifying party, upon request of the
          indemnified party, shall retain counsel reasonably satisfactory
          to the indemnified party to represent the indemnified party and
          any others the indemnifying party may designate in such
          proceeding and shall pay the fees and disbursements of such
          counsel related to such proceeding.  In any such proceeding, any
          indemnified party shall have the right to retain its own counsel,
          but the fees and expenses of such counsel shall be at the expense
          of such indemnified party unless (i) the indemnifying party and
          the indemnified party shall have mutually agreed to the retention
          of such counsel or (ii) the named parties to any such proceeding
          (including any impleaded parties) include both the indemnifying
          party and the indemnified party and representation of both
          parties by the same counsel would be inappropriate due to actual
          or potential differing interests between them.  It is understood
          that the indemnifying party shall not, in connection with any
          proceeding or related proceedings in the same jurisdiction, be
          liable for (a) the fees and expenses of more than one separate
          firm (in addition to any local counsel) for the Placement Agent
          and all Persons, if any, who control the Placement Agent within
          the meaning of either Section 15 of the 1933 Act or Section 20 of
          the 1934 Act, (b) the fees and expenses of more than one separate
          firm (in addition to any local counsel) for Holdings, its
          directors, its officers who sign the Registration Statement and
          each Person, if any, who controls Holdings within the meaning of
          either such Section and (c) the fees and expenses of more than
          one separate firm (in addition to any local counsel) for all
          Holders and all Persons, if any, who control any Holders within
          the meaning of either such Section, and that all such fees and
          expenses shall be reimbursed as they are incurred.  In such case
          involving the Placement Agent and Persons who control the
          Placement Agent, such firm shall be designated in writing by the
          Placement Agent.  In such case involving the Holders and such
          Persons who control Holders, such firm shall be designated in
          writing by the Majority Holders.  In all other cases, such firm
          shall be designated by Holdings.  The indemnifying party shall
          not be liable for any settlement of any proceeding effected
          without its written consent but, if settled with such consent or
          if there be a final judgment for the plaintiff, the indemnifying
          party agrees to indemnify the indemnified party from and against
          any loss or liability by reason of such settlement or judgment. 
          Notwithstanding the foregoing sentence, if at any time an
          indemnified party shall have requested an indemnifying party to
          reimburse the indemnified party for fees and expenses of counsel
          as contemplated by the second and third sentences of this
          paragraph, the indemnifying party agrees that it shall be liable
          for any settlement of any proceeding effected without its written
          consent if (i) such settlement is entered into more than 30 days
          after receipt by such indemnifying party of the aforesaid request
          and (ii) such indemnifying party shall not have reimbursed the
          indemnified party for such fees and expenses of counsel in
          accordance with such request prior to the date of such
          settlement.  No indemnifying party shall, without the prior
          written consent of the indemnified party, effect any settlement
          of any pending or threatened proceeding in respect of which such
          indemnified party is or could have been a party and indemnity
          could have been sought hereunder by such indemnified party,
          unless such settlement includes an unconditional release of such
          indemnified party from all liability on claims that are the
          subject matter of such proceeding.

                    (d)  If the indemnification provided for in paragraph
          (a) or paragraph (b) of this Section 4 is unavailable to an
          indemnified party or insufficient in respect of any losses,
          claims, damages or liabilities, then each indemnifying party
          under such paragraph, in lieu of indemnifying such indemnified
          party thereunder, shall contribute to the amount paid or payable
          by such indemnified party as a result of such losses, claims,
          damages or liabilities in such proportion as is appropriate to
          reflect the relative fault of the indemnifying party or parties
          on the one hand and of the indemnified party or parties on the
          other hand in connection with the statements or omissions that
          resulted in such losses, claims, damages or liabilities, as well
          as any other relevant equitable considerations.  The relative
          fault of Holdings and the Holders shall be determined by
          reference  to, among other things, whether the untrue or alleged
          untrue statement of a material fact or the omission or alleged
          omission to state a material fact relates to information supplied
          by Holdings or by the Holders and the parties' relative intent,
          knowledge, access to information and opportunity to correct or
          prevent such statement or omission.  The Holders' obligations to
          contribute pursuant to this Section 5(d) are several in
          proportion to the  principal amount of Registrable Shares of such
          Holder that were registered pursuant to a Registration Statement. 

                    (e)  Holdings and each Holder agree that it would not
          be just or equitable if contribution pursuant to this Section 5
          were determined by pro rata allocation or by any other method of
                             --- ---- allocation that does not take account
          of the equitable considerations referred to in paragraph (d)
          above.  The amount paid or payable by an indemnified party as a
          result of the losses, claims, damages and liabilities referred to
          in paragraph (d) above shall be deemed to include, subject to the
          limitations set forth above, any legal or other expenses
          reasonably incurred by such indemnified party in connection with
          investigating or defending any such action or claim. 
          Notwithstanding the provisions of this Section 5, no Holder shall
          be required to contribute any amount in excess of the amount by
          which the total price at which Registrable Shares were sold by
          such Holder exceeds the amount of any damages that such Holder
          has otherwise been required to pay by reason of such untrue or
          alleged untrue statement or omission or alleged omission.  No
          Person guilty of fraudulent misrepresentation (within the meaning
          of Section 11(f) of the 1933 Act) shall be entitled to
          contribution from any Person who was not guilty of such
          fraudulent misrepresentation.  The remedies provided for in this
          Section 5 are not exclusive and shall not limit any rights or
          remedies which may otherwise be available to any indemnified
          party at law or in equity.

                    (f)  Survival.  
                         --------- The indemnity and contribution
          provisions contained in this Section 5 shall remain operative and
          in full force and effect regardless of (i) any termination of
          this Agreement, (ii) any investigation made by or on behalf of
          the Placement Agent, any Holder or any person controlling the
          Placement Agent or any Holder, or by or on behalf of Holdings,
          its officers or directors or any Person controlling Holdings,
          (iii) acceptance of any of the Exchange Shares and (iv) any sale
          of Registrable Shares pursuant to a Shelf Registration Statement.

                    6.   Miscellaneous.
                         --------------

                    (a)  No Inconsistent Agreements.  
                         --------------------------    Holdings has not
          entered into, and on or after the date of this Agreement will not
          enter into, any agreement which is inconsistent with the rights
          granted to the Holders of Registrable Shares in this Agreement or
          otherwise conflicts with the provisions hereof.  The rights
          granted to the Holders hereunder do not in any way conflict with
          and are not inconsistent with the rights granted to the holders
          of Holdings' other issued and outstanding securities under any
          such agreements.

                    (b)  Amendments and Waivers.  
                         ----------------------   The provisions of this
          Agreement, including the provisions of this sentence, may not be
          amended, modified or supplemented, and waivers or consents to
          departures from the provisions hereof may not be given unless
          Holdings has obtained the written consent of Holders of at least
          a majority in aggregate principal amount of the outstanding
          Registrable Shares affected by such amendment, modification,
          supplement, waiver or consent; provided, however, that no
                                         --------  ------- amendment,
          modification, supplement, waiver or consents to any departure
          from the provisions of Section 5 hereof shall be effective as
          against any Holder of Registrable Shares unless consented to in
          writing by such Holder.

                    (c)  Notices.  
                         --------  All notices and other communications
          provided for or permitted hereunder shall be made in writing by
          hand-delivery, registered first-class mail, telex, telecopier, or
          any courier guaranteeing overnight delivery (i) if to a Holder,
          at the most current address given by such Holder to Holdings by
          means of a notice given in accordance with the provisions of this
          Section 6(c), which address initially is, with respect to the
          Placement Agent, the address set forth in the Placement
          Agreement; (ii) if to Holdings, initially at 9605 East Maroon
          Circle, P.O. Box 6742, Englewood, Colorado 80155-6742 and
          thereafter at such other address, notice of which is given in
          accordance with the provisions of this Section 6(c).

                    All such notices and communications shall be deemed to
          have been duly given:  at the time delivered by hand, if
          personally delivered; five business days after being deposited in
          the mail, postage prepaid, if mailed; when answered back, if
          telexed; when receipt is acknowledged, if telecopied; and on the
          next business day if timely delivered to an air courier
          guaranteeing overnight delivery.

                    Copies of all such notices, demands, or other
          communications shall be concurrently delivered by the person
          giving the same to the Transfer Agent, at 40 Wall Street, 46th
          Floor, New York, New York 10005.

                    (d)  Successors and Assigns.
                         ----------------------   This Agreement shall
          inure to the benefit of and be binding upon the successors,
          assigns and transferees of each of the parties, including,
          without limitation and without the need for an express
          assignment, subsequent Holders; provided that nothing herein
                                          -------- shall be deemed to
          permit any assignment, transfer or other disposition of
          Registrable Shares in violation of the terms of the Placement
          Agreement.  If any transferee of any Holder shall acquire
          Registrable Shares, in any manner, whether by operation of law or
          otherwise, such Registrable Shares shall be held subject to all
          of the terms of this Agreement, and by taking and holding such
          Registrable Shares such person shall be conclusively deemed to
          have agreed to be bound by and to perform all of the terms and
          provisions of this Agreement and such person shall be entitled to
          receive the benefits hereof.  The Placement Agent (solely in its
          capacity as Placement Agent) shall have no liability or
          obligation to Holdings with respect to any failure by a Holder to
          comply with, or any breach by any Holder of, any of the
          obligations of such Holder under this Agreement.

                    (e)  Purchases and Sales of Shares.  
                         ------------------------------     Holdings shall
          not, and shall use its best efforts to cause its affiliates (as
          defined in Rule 405 under the 1933 Act) not to, purchase and then
          resell or otherwise transfer any Shares.

                    (f)  Third Party Beneficiary.
                         -----------------------  The Holders shall be
          third party beneficiaries to the agreements made hereunder
          between Holdings, on the one hand, and the Placement Agent, on
          the other hand, and each Holder shall have the right to enforce
          such agreements directly to the extent it deems such enforcement
          necessary or advisable to protect its rights or the rights of
          Holders hereunder.

                    (g)  Counterparts.  
                         -------------  This Agreement may be executed
          manually or by facsimile in any number of counterparts, each of
          which when so executed shall be deemed to be an original and all
          of which taken together shall constitute one and the same
          agreement.

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

                    (i)  Governing Law; Submission to Jurisdiction.  
                         -----------------------------------------    The
          laws of the State of New York applicable to contracts to be
          performed entirely in that state shall govern this Agreement. 
          Holdings agrees to submit to the jurisdiction of any federal or
          state court located in The City of New York in any suit, action
          or proceeding with respect to this Agreement and for actions
          brought under the U.S. federal or state securities laws brought
          in any such court.  

                    (j)  Severability.  
                         ------------   In the event that any one or more
          of the provisions contained herein, or the application thereof in
          any circumstance, is held invalid, illegal or unenforceable, the
          validity, legality and enforceability of any such provision in
          every other respect and of the remaining provisions contained
          herein shall not be affected or impaired thereby.


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



                                                  ICG HOLDINGS, INC.


                                                  By /s/ James D. Grenfell
                                                    -------------------------
                                                     Name: James D. Grenfell
                                                     Title: Executive Vice 
                                                            President, Chief 
                                                            Financial Officer
                                                            and Treasurer


          Confirmed and accepted as of
            the date first above written:

          MORGAN STANLEY & CO. 
             INCORPORATED


          By /s/ James B. Avery
            ------------------------------
             Name: James B. Avery
             Title:  Vice President