SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  Schedule 13D

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 2)*



                        Crown Castle International Corp.
                                (Name of Issuer)

                     Common Stock, par value $.01 per share
                         (Title of Class of Securities)

                                    228227104
                                 (CUSIP Number)

                            Thomas R. Stephens, Esq.
                      Bartlit Beck Herman Palenchar & Scott
                         511 Sixteenth Street Suite 700
                             Denver, Colorado 80202
                                 (303) 592-3100
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                November 11, 1999
             (Date of Event which Requires Filing of this Statement)



If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  which is the subject of this  Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box.

Note: Six copies of this statement, including all exhibits, should be filed with
the  Commission.  See Rule  13d-1(a) for other  parties to whom copies are to be
sent.

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).

                        (Continued on following page(s))

                               Page 1 of 19 Pages


CUSIP No. 228227104 Page 2 of 19 Pages 1. Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only) Centennial Fund IV, L.P. 2. Check the Appropriate Box if a Member of a Group (See Instructions) (A) (B) X 3. SEC Use Only 4. Source of Funds (See Instructions) WC 5. Check if Disclosure of Legal Proceedings is Required Pursuant to Items 2(d) or 2(e) 6. Citizenship or Place of Organization Delaware Number of 7. Sole Voting Power 4,765,340 Shares Bene- ficially 8. Shared voting Power Owned by Each Reporting 9. Sole Dispositive Power 4,765,340 Person With 10. Shared Dispositive Power 11. Aggregate Amount Beneficially Owned by Each Reporting Person: 4,765,340 12. Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) X 13. Percent of Class Represented by Amount in Row (11) 3.3% 14. Type of Reporting Person (See Instructions) PN

CUSIP No. 228227104 Page 3 of 19 Pages 1. Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only) Centennial Holdings IV, L.P. 2. Check the Appropriate Box if a Member of a Group (See Instructions) (A) (B) X 3. SEC Use Only 4. Source of Funds (See Instructions) 5. Check if Disclosure of Legal Proceedings is Required Pursuant to Items 2(d) or 2(e) 6. Citizenship or Place of Organization Number of 7. Sole Voting Power 5,001,337 Shares Bene- ficially 8. Shared voting Power Owned by Each Reporting 9. Sole Dispositive Power 5,001,337 Person With 10. Shared Dispositive Power 11. Aggregate Amount Beneficially Owned by Each Reporting Person: 5,001,337 12. Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) X 13. Percent of Class Represented by Amount in Row (11) 3.5% 14. Type of Reporting Person (See Instructions) PN

CUSIP No. 228227104 Page 4 of 19 Pages 1. Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only) Centennial Fund V, L.P. 2. Check the Appropriate Box if a Member of a Group (See Instructions) (A) (B) X 3. SEC Use Only 4. Source of Funds (See Instructions) WC 5. Check if Disclosure of Legal Proceedings is Required Pursuant to Items 2(d) or 2(e) 6. Citizenship or Place of Organization Delaware Number of 7. Sole Voting Power 3,331,285 Shares Bene- ficially 8. Shared voting Power Owned by Each Reporting 9. Sole Dispositive Power 3,331,285 Person With 10. Shared Dispositive Power 11. Aggregate Amount Beneficially Owned by Each Reporting Person: 3,331,285 12. Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) X 13. Percent of Class Represented by Amount in Row (11) 2.3% 14. Type of Reporting Person (See Instructions) PN

CUSIP No. 228227104 Page 5 of 19 Pages 1. Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only) Centennial Entrepreneurs Fund V, L.P. 2. Check the Appropriate Box if a Member of a Group (See Instructions) (A) (B) X 3. SEC Use Only 4. Source of Funds (See Instructions) WC 5. Check if Disclosure of Legal Proceedings is Required Pursuant to Items 2(d) or 2(e) 6. Citizenship or Place of Organization Delaware Number of 7. Sole Voting Power 103,415 Shares Bene- ficially 8. Shared voting Power Owned by Each Reporting 9. Sole Dispositive Power 103,415 Person With 10. Shared Dispositive Power 11. Aggregate Amount Beneficially Owned by Each Reporting Person: 103,415 12. Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) X 13. Percent of Class Represented by Amount in Row (11) .001% 14. Type of Reporting Person (See Instructions) PN

CUSIP No. 228227104 Page 6 of 19 Pages 1. Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only) Centennial Holdings V, L.P. 2. Check the Appropriate Box if a Member of a Group (See Instructions) (A) (B) X 3. SEC Use Only 4. Source of Funds (See Instructions) 5. Check if Disclosure of Legal Proceedings is Required Pursuant to Items 2(d) or 2(e) 6. Citizenship or Place of Organization Delaware Number of 7. Sole Voting Power 3,434,700 Shares Bene- ficially 8. Shared voting Power Owned by Each Reporting 9. Sole Dispositive Power 3,434,700 Person With 10. Shared Dispositive Power 11. Aggregate Amount Beneficially Owned by Each Reporting Person 3,434,700 12. Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) X 13. Percent of Class Represented by Amount in Row (11) 2.4% 14. Type of Reporting Person (See Instructions) PN

Introductory Statement This amended statement on Schedule 13D relates to the Common Stock, $.01 par value per share (the "Shares") of Crown Castle International Corp., a Delaware corporation (the "Company"). This amendment is filed by Centennial Fund IV, L.P., a Delaware limited partnership ("Centennial IV"), Centennial Holdings IV, L.P., a Delaware limited partnership ("Holdings IV"), Centennial Fund V, L.P., a Delaware limited partnership ("Centennial V"), Centennial Entrepreneurs Fund V, L.P., a Delaware limited partnership ("Entrepreneurs V"), and Centennial Holdings V, L.P., a Delaware limited partnership ("Holdings V") (collectively, the "Centennial Reporting Persons"). This amendment amends Items 4, 5, 6 and 7, with respect to information concerning the Centennial Reporting Persons, of a statement of Schedule 13D (the "Original Filing") previously filed by Digital Future Investments B.V.; TeleDiffusion de France International S.A.; TeleDiffusion de France; France Telecom; Candover Investments plc; Candover (Trustees) Limited; Candover Partners Limited (as general partner of the Candover 1994 UK Limited Partnership, the Candover 1994 UK No.2 Limited Partnership, the Candover 1994 US No.1 Limited Partnership and the Candover 1994 US No.2 Limited Partnership); Candover Services Limited; Ted B. Miller, Jr.; The Miller 1996 Gift Trust; Robert A. Crown (individually and for the Robert A. Crown grantor retained annuity trust); Barbara A. Crown (individually and for the Barbara A. Crown grantor retained annuity trust); Berkshire Fund III, A Limited Partnership; Third Berkshire Associates Limited Partnership; Berkshire Fund IV, Limited Partnership; Fourth Berkshire Associates LLC; Berkshire Investors LLC; Centennial IV; Holdings IV; Centennial V; Entrepreneurs V; Holdings V; Nassau Capital Partners II, L.P.; Nassau Capital LLC; NAS Partners I, L.L.C.; Fay, Richwhite Communications Limited; PNC Venture Corp.; PNC Holding Corp.; PNC Bank Corp.; American Home Assurance Company; American International Group, Inc.; New York Life Insurance Company; The Northwestern Mutual Life Insurance Company; Harvard Private Capital Holdings, Inc.; Charlesbank Capital Partners, LLC; Prime VIII, L.P. and Prime SKA I, L.L.C. No Centennial Reporting Person assumes responsibility for the completeness or accuracy of the information contained in the Original Filing or any amendment to the Original Filing concerning any other person. Item 4. Purpose of Transaction No change except for the addition of the following: On November 11, 1999, Centennial IV, Centennial V and Centennial Entrepreneurs Fund V distributed a total of 1,200,000, 400,000 and 12,000 Shares, respectively, to their respective partners. In such distribution, Holdings IV and Holdings V received a total of 254,802 and 3,567 Shares, respectively, and Holdings IV and Holdings V immediately distributed 18,805 and 3,567 of such Shares, respectively, to their respective partners. Such distributions were done in the ordinary course of operations by the Centennial Reporting Persons. Depending upon their evaluation of the Company's investments and prospects, and upon future developments (including, but not limited to, market for the Shares, the effective yield on the Shares, availability of funds, alternative uses of funds, and money, stock market and general economic conditions), each of the Centennial Reporting Persons may from time to time purchase Shares, dispose of all or a portion of the Shares that it holds, or cease buying or selling Shares. Any such additional purchases or sales of the Shares may be in open market or privately-negotiated transactions or otherwise. The information contained in Item 6 of this amendment is hereby incorporated by reference. Item 5. Interest in Securities of the Issuer. No change except for the addition of the following: (a) Centennial IV is the direct beneficial owner of 4,765,340 Shares, or approximately 3.3% of the 144,915,296 outstanding Shares as of November 1, 1999, as reported in the Company's quarterly report of Form 10-Q for the quarter ended September 30, 1999 (the "Outstanding Shares"). By virtue of the relationships previously reported under Item 2 of the Original Filing, Holdings IV may be deemed to have indirect beneficial ownership of the Shares directly beneficially owned by Centennial IV. Holdings IV is the direct beneficial owner of 235,997 Shares, or approximately 0.2% of the Outstanding Shares. Centennial V is the direct beneficial owner of 3,331,285 Shares, or approximately 2.3% of the Outstanding Shares. By virtue of the relationships previously reported under Item 2 of the Original Filing, Holdings V may be deemed to have indirect beneficial ownership of the Shares directly beneficially owned by Centennial V. Centennial Entrepreneurs V is the direct beneficial owner of 103,415 Shares, or approximately .001% of the Outstanding Shares. By virtue of the relationships previously reported under Item 2 of the Original Filing, Holdings V may be deemed to have indirect beneficial ownership of the Shares directly beneficially owned by Centennial Entrepreneurs V. On January 14, 1999, Mr. Jeffrey Schutz, a general partner of Holdings IV and Holdings V and a director of the Company, received an option for 5,000 Shares in connection with his services as a director of the Company. Mr. Schutz holds such options on behalf of Centennial IV and Centennial V and Centennial IV and Centennial V may be deemed to have an economic interest in such underlying Shares. Mr. Schutz disclaims beneficial ownership of the Shares underlying such option. Certain of the 18,805 Shares distributed by Holdings IV to its partners and 3,567 Shares distributed by Holdings V to its partners are held by the general partners of Holdings IV and Holdings V. (c) The information under the first paragraph of Item 4 of this amendment is hereby incorporated by reference. Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer. No change except for the addition of the following: The Stockholders Agreement dated August 21, 1998, previously filed as Exhibit 2 to the Original Filing, was amended by amendments number 1, 2, 3, and 4, which amendments are filed as exhibits to this amended statement and are incorporated by reference. Item 7. Material to be Filed as Exhibits. No change except the addition of the following: Exhibit 1. Amendment dated November 12, 1998 to the Stockholders Agreement dated August 21, 1998 among Crown Castle International Corp. and certain stockholders, incorporated by reference to Exhibit 15 to the amended statement on Schedule 13D filed by Candover Investments plc, Candover (Trustees) Limited, Candover Partners Limited (as general partner of the Candover 1994 UK Limited Partnership, the Candover 1994 UK No.2 Limited Partnership, the Candover 1994 US No.1 Limited Partnership and the Candover 1994 US No.2 Limited Partnership) and Candover Services Limited on November 9, 1999 (the "Candover 13D"). Exhibit 2. Amendment dated May 24, 1999 to the Stockholders Agreement dated August 21, 1998 among Crown Castle International Corp. and certain stockholders, incorporated by reference to Exhibit 16 to the Candover 13D. Exhibit 3. Amendment dated August 11, 1999 to the Stockholders Agreement dated August 21, 1998 among Crown Castle International Corp. and certain stockholders, incorporated by reference to Exhibit 17 to the Candover 13D. Exhibit 4. Amendment dated October 1, 1999 to the Stockholders Agreement dated August 21, 1998 among Crown Castle International Corp. and certain stockholders, incorporated by reference to Exhibit 18 to the Candover 13D.

Signature After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Date: November 18, 1999 /s/ Jeffrey Schutz Jeffrey Schutz, as general partner of Centennial Holdings IV, L.P., general partner of Centennial Fund IV, L.P., and as general partner of Centennial Holdings V, L.P., general partner of Centennial Fund V, L.P. and Centennial Entrepreneurs Fund V., L.P.