Edgar Filing: AMERICAN TOWER CORP

/--------------------------/
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UNITED STATES / /
SECURITIES AND EXCHANGE COMMISSION / OMB Number: 3235-0145 /
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SCHEDULE 13D

UNDER THE SECURITIES EXCHANGE ACT OF 1934
AMENDMENT NO. 1*

American Tower Corporation
--------------------------------------------------------------------------------
(Name of Issuer)

Class A Common Stock, $.01 par value
--------------------------------------------------------------------------------
(Title of Class of Securities)

029912201
--------------------------------------------------------------------------------
(CUSIP Number)

SPO Partners & Co.
591 Redwood Highway, Suite 3215
Mill Valley, California 94941
(415) 383-6600

with a copy to:

Phillip Gordon
Altheimer & Gray
10 South Wacker Drive
Chicago, Illinois 60606
(312) 715-4000
--------------------------------------------------------------------------------
(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)

July 12, 2002
--------------------------------------------------------------------------------
(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 ss.ss. 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the
following box. [_]

Check the following box if a fee is being paid with the statement. [_]

*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).

CUSIP NO. 029912201 Page 2 of 26
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1. Name of Reporting Person:

SPO Partners II, L.P.

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2. Check the Appropriate Box if a Member of a Group:

(a) [_]

(b) [X]

--------------------------------------------------------------------------------

3. SEC Use Only

--------------------------------------------------------------------------------

4. Source of Funds: WC

--------------------------------------------------------------------------------

5. Check box if Disclosure of Legal Proceedings is
Required Pursuant to Items 2(e) or 2(f):

[_]

--------------------------------------------------------------------------------

6. Citizenship or Place of Organization: Delaware

----------------------------------------------------------------
Number of
Shares 7. Sole Voting Power: 5,752,300 (1)

----------------------------------------------------------------
Beneficially
Owned By 8. Shared Voting Power: -0-

----------------------------------------------------------------
Each
Reporting 9. Sole Dispositive Power: 5,752,300 (1)

----------------------------------------------------------------
Person
With 10. Shared Dispositive Power: -0-

--------------------------------------------------------------------------------

11. Aggregate Amount Beneficially Owned by Each Reporting Person:

5,752,300 (1)

--------------------------------------------------------------------------------

12. Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares:
[_]

--------------------------------------------------------------------------------

13. Percent of Class Represented by Amount in Row (11): 3.1%

--------------------------------------------------------------------------------

14. Type of Reporting Person: PN

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(1) Power is exercised through its sole general partner, SPO Advisory
Partners, L.P.

CUSIP NO. 029912201 Page 3 of 26
--------------------------------------------------------------------------------

1. Name of Reporting Person:

SPO Advisory Partners, L.P.

--------------------------------------------------------------------------------

2. Check the Appropriate Box if a Member of a Group:

(a) [_]

(b) [X]

--------------------------------------------------------------------------------

3. SEC Use Only

--------------------------------------------------------------------------------

4. Source of Funds: Not Applicable

--------------------------------------------------------------------------------

5. Check box if Disclosure of Legal Proceedings is
Required Pursuant to Items 2(e) or 2(f):

[_]

--------------------------------------------------------------------------------

6. Citizenship or Place of Organization: Delaware

----------------------------------------------------------------
Number of
Shares 7. Sole Voting Power: 5,752,300 (1)(2)

----------------------------------------------------------------
Beneficially
Owned By 8. Shared Voting Power: -0-

----------------------------------------------------------------
Each
Reporting 9. Sole Dispositive Power: 5,752,300 (1)(2)

----------------------------------------------------------------
Person
With 10. Shared Dispositive Power: -0-

--------------------------------------------------------------------------------

11. Aggregate Amount Beneficially Owned by Each Reporting Person:

5,752,300 (1)(2)

--------------------------------------------------------------------------------

12. Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares:
[_]

--------------------------------------------------------------------------------

13. Percent of Class Represented by Amount in Row (11): 3.1%

--------------------------------------------------------------------------------

14. Type of Reporting Person: PN

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(1) Solely in its capacity as the sole general partner of SPO Partners II,
L.P.
(2) Power is exercised through its corporate general partner, SPO
Advisory Corp.

CUSIP NO. 029912201 Page 4 of 26
--------------------------------------------------------------------------------

1. Name of Reporting Person:

San Francisco Partners II, L.P.

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2. Check the Appropriate Box if a Member of a Group:

(a) [_]

(b) [X]

--------------------------------------------------------------------------------

3. SEC Use Only

--------------------------------------------------------------------------------

4. Source of Funds: WC

--------------------------------------------------------------------------------

5. Check box if Disclosure of Legal Proceedings is
Required Pursuant to Items 2(e) or 2(f):

[_]

--------------------------------------------------------------------------------

6. Citizenship or Place of Organization: California

----------------------------------------------------------------
Number of
Shares 7. Sole Voting Power: 942,700 (1)

----------------------------------------------------------------
Beneficially
Owned By 8. Shared Voting Power: -0-

----------------------------------------------------------------
Each
Reporting 9. Sole Dispositive Power: 942,700 (1)

----------------------------------------------------------------
Person
With 10. Shared Dispositive Power: -0-

--------------------------------------------------------------------------------

11. Aggregate Amount Beneficially Owned by Each Reporting Person:

942,700 (1)

--------------------------------------------------------------------------------

12. Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares:
[_]

--------------------------------------------------------------------------------

13. Percent of Class Represented by Amount in Row (11): 0.5%

--------------------------------------------------------------------------------

14. Type of Reporting Person: PN

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(1) Power is exercised through its sole general partner, SF Advisory
Partners, L.P.

CUSIP NO. 029912201 Page 5 of 26
--------------------------------------------------------------------------------

1. Name of Reporting Person:

SF Advisory Partners, L.P.

--------------------------------------------------------------------------------

2. Check the Appropriate Box if a Member of a Group:

(a) [_]

(b) [X]

--------------------------------------------------------------------------------

3. SEC Use Only

--------------------------------------------------------------------------------

4. Source of Funds: Not Applicable

--------------------------------------------------------------------------------

5. Check box if Disclosure of Legal Proceedings is
Required Pursuant to Items 2(e) or 2(f):

[_]

--------------------------------------------------------------------------------

6. Citizenship or Place of Organization: Delaware

----------------------------------------------------------------
Number of
Shares 7. Sole Voting Power: 942,700 (1)(2)

----------------------------------------------------------------
Beneficially
Owned By 8. Shared Voting Power: -0-

----------------------------------------------------------------
Each
Reporting 9. Sole Dispositive Power: 942,700 (1)(2)

----------------------------------------------------------------
Person
With 10. Shared Dispositive Power: -0-

--------------------------------------------------------------------------------

11. Aggregate Amount Beneficially Owned by Each Reporting Person:

942,700 (1)(2)

--------------------------------------------------------------------------------

12. Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares:
[_]

--------------------------------------------------------------------------------

13. Percent of Class Represented by Amount in Row (11): 0.5%

--------------------------------------------------------------------------------

14. Type of Reporting Person: PN

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(1) Solely in its capacity as the sole general partner of San Francisco
Partners II, L.P.
(2) Power is exercised through its corporate general partner, SPO Advisory
Corp.

CUSIP NO. 029912201 Page 6 of 26
--------------------------------------------------------------------------------

1. Name of Reporting Person:

SPO Advisory Corp.

--------------------------------------------------------------------------------

2. Check the Appropriate Box if a Member of a Group:
(a) [_]

(b) [X]

--------------------------------------------------------------------------------

3. SEC Use Only

--------------------------------------------------------------------------------

4. Source of Funds: Not Applicable

--------------------------------------------------------------------------------

5. Check box if Disclosure of Legal Proceedings is
Required Pursuant to Items 2(e) or 2(f):
[_]

--------------------------------------------------------------------------------

6. Citizenship or Place of Organization: Delaware

-----------------------------------------------------------

Number of 7. Sole Voting Power: -0-
Shares
-----------------------------------------------------------

Beneficially 8. Shared Voting Power: 6,695,000 (1)(2)
Owned By
-----------------------------------------------------------
Each
Reporting 9. Sole Dispositive Power: -0-

-----------------------------------------------------------
Person
With 10. Shared Dispositive Power: 6,695,000 (1)(2)

--------------------------------------------------------------------------------

11. Aggregate Amount Beneficially Owned by Each Reporting Person:
6,695,000 (1)(2)

--------------------------------------------------------------------------------

12. Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares:
[_]

--------------------------------------------------------------------------------

13. Percent of Class Represented by Amount in Row (11): 3.6%

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14. Type of Reporting Person: CO

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(1) Solely in its capacity as the general partner of SPO Advisory
Partners, L.P. with respect to 5,752,300 of such shares; and solely in
its capacity as the general partner of SF Advisory Partners, L.P. with
respect to 942,700 of such shares.
(2) Power is exercised through its three controlling persons, John H.
Scully, William E. Oberndorf and William J. Patterson.

CUSIP NO. 029912201 Page 7 of 26
--------------------------------------------------------------------------------

1. Name of Reporting Person:

Cranberry Lake Partners, L.P.

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2. Check the Appropriate Box if a Member of a Group:
(a) [_]

(b) [X]

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3. SEC Use Only

--------------------------------------------------------------------------------

4. Source of Funds: WC

--------------------------------------------------------------------------------

5. Check box if Disclosure of Legal Proceedings is
Required Pursuant to Items 2(e) or 2(f):
[_]

--------------------------------------------------------------------------------

6. Citizenship or Place of Organization: California

-----------------------------------------------------------

Number of 7. Sole Voting Power: 792,700(1)
Shares
-----------------------------------------------------------

Beneficially 8. Shared Voting Power: -0-
Owned By
-----------------------------------------------------------
Each
Reporting 9. Sole Dispositive Power: 792,700(1)

-----------------------------------------------------------
Person
With 10. Shared Dispositive Power: -0-

--------------------------------------------------------------------------------

11. Aggregate Amount Beneficially Owned by Each Reporting Person:
792,700(1)

--------------------------------------------------------------------------------

12. Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares:
[_]

--------------------------------------------------------------------------------

13. Percent of Class Represented by Amount in Row (11): 0.4%

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14. Type of Reporting Person: PN

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(1) Power is exercised through its sole general partner, the John and
Irene Scully Trust, dated May 30, 1994, for which John H. Scully and
Irene S. Scully are the Trustees.

CUSIP NO. 029912201 Page 8 of 26
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1. Name of Reporting Person:

D. L. & W., Inc. Profit Sharing Retirement Plan

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2. Check the Appropriate Box if a Member of a Group:

(a) [_]

(b) [X]

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3. SEC Use Only

--------------------------------------------------------------------------------

4. Source of Funds: WC

--------------------------------------------------------------------------------

5. Check box if Disclosure of Legal Proceedings is
Required Pursuant to Items 2(e) or 2(f):

[_]

--------------------------------------------------------------------------------

6. Citizenship or Place of Organization: California

----------------------------------------------------------------

Number of 7. Sole Voting Power: 256,400 (1)
Shares
----------------------------------------------------------------

Beneficially 8. Shared Voting Power: -0-
Owned By
----------------------------------------------------------------

Each 9. Sole Dispositive Power: 256,400 (1)
Reporting
----------------------------------------------------------------
Person
With 10. Shared Dispositive Power: -0-

--------------------------------------------------------------------------------

11. Aggregate Amount Beneficially Owned by Each Reporting Person:
256,400 (1)

--------------------------------------------------------------------------------

12. Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares:
[_]

--------------------------------------------------------------------------------

13. Percent of Class Represented by Amount in Row (11): 0.1%

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14. Type of Reporting Person: CO

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(1) Power is exercised through its sole trustee, John H. Scully.

CUSIP NO. 029912201 Page 9 of 26
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1. Name of Reporting Person:

Phoebe Snow Foundation, Inc.

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2. Check the Appropriate Box if a Member of a Group:

(a) [_]

(b) [X]

--------------------------------------------------------------------------------

3. SEC Use Only

--------------------------------------------------------------------------------

4. Source of Funds: WC

--------------------------------------------------------------------------------

5. Check box if Disclosure of Legal Proceedings is
Required Pursuant to Items 2(e) or 2(f):

[_]

--------------------------------------------------------------------------------

6. Citizenship or Place of Organization: California

----------------------------------------------------------------

Number of 7. Sole Voting Power: 906,200 (1)
Shares
----------------------------------------------------------------

Beneficially 8. Shared Voting Power: -0-
Owned By
----------------------------------------------------------------

Each 9. Sole Dispositive Power: 906,200 (1)
Reporting
----------------------------------------------------------------
Person
With 10. Shared Dispositive Power: -0-

--------------------------------------------------------------------------------

11. Aggregate Amount Beneficially Owned by Each Reporting Person:
906,200 (1)

--------------------------------------------------------------------------------

12. Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares:
[_]

--------------------------------------------------------------------------------

13. Percent of Class Represented by Amount in Row (11): 0.5%

--------------------------------------------------------------------------------

14. Type of Reporting Person: CO

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(1) Power is exercised through its controlling person and sole director
and executive officer, John H. Scully.

CUSIP NO. 029912201 Page 10 of 26
--------------------------------------------------------------------------------

1. Name of Reporting Person:

John H. Scully

--------------------------------------------------------------------------------

2. Check the Appropriate Box if a Member of a Group:
(a) [_]
(b) [X]

--------------------------------------------------------------------------------

3. SEC Use Only

--------------------------------------------------------------------------------

4. Source of Funds: PF and Not Applicable

--------------------------------------------------------------------------------

5. Check box if Disclosure of Legal Proceedings is
Required Pursuant to Items 2(e) or 2(f):
[_]

--------------------------------------------------------------------------------

6. Citizenship or Place of Organization: USA

-----------------------------------------------------------
Number of
Shares 7. Sole Voting Power: 1,640,340 (1)

-----------------------------------------------------------
Beneficially
Owned By 8. Shared Voting Power: 8,650,300 (2)

-----------------------------------------------------------
Each
Reporting 9. Sole Dispositive Power: 1,640,340 (1)

-----------------------------------------------------------
Person
With 10. Shared Dispositive Power: 8,650,300 (2)

--------------------------------------------------------------------------------

11. Aggregate Amount Beneficially Owned by Each Reporting Person:

10,290,640 (1)(2)

--------------------------------------------------------------------------------

12. Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares:
[_]

--------------------------------------------------------------------------------

13. Percent of Class Represented by Amount in Row (11): 5.6%

--------------------------------------------------------------------------------

14. Type of Reporting Person: IN

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(1) 1,300 shares held in John H. Scully Individual Retirement Account, a
self-directed individual retirement account and 1,639,040 shares held in the
John and Irene Scully Living Trust.

(2) Of these, 6,695,000 shares are beneficially owned solely in his capacity as
one of three controlling persons of SPO Advisory Corp., 792,700 shares are
beneficially owned solely in his capacity as trustee for the general partner of
Cranberry Lake Partners, L.P., 256,400 shares are beneficially owned solely in
his capacity as controlling person of D. L. & W., Inc. Profit Sharing Retirement
Plan, and 906,200 shares are beneficially owned solely in his capacity as
controlling person of Phoebe Snow Foundation, Inc.

CUSIP NO. 029912201 Page 11 of 26
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1. Name of Reporting Person:

William E. Oberndorf

--------------------------------------------------------------------------------

2. Check the Appropriate Box if a Member of a Group:
(a) [_]
(b) [X]

--------------------------------------------------------------------------------

3. SEC Use Only

--------------------------------------------------------------------------------

4. Source of Funds: PF and Not Applicable

--------------------------------------------------------------------------------

5. Check box if Disclosure of Legal Proceedings is
Required Pursuant to Items 2(e) or 2(f):
[_]

--------------------------------------------------------------------------------

6. Citizenship or Place of Organization: USA

-----------------------------------------------------------
Number of
Shares 7. Sole Voting Power: 583,520 (1)

-----------------------------------------------------------
Beneficially
Owned By 8. Shared Voting Power: 7,907,555 (2)

-----------------------------------------------------------
Each
Reporting 9. Sole Dispositive Power: 583,520 (1)

-----------------------------------------------------------
Person
With 10. Shared Dispositive Power: 7,907,555 (2)

--------------------------------------------------------------------------------

11. Aggregate Amount Beneficially Owned by Each Reporting Person:
8,491,075 (1)(2)

--------------------------------------------------------------------------------

12. Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares:
[_]

--------------------------------------------------------------------------------

13. Percent of Class Represented by Amount in Row (11): 4.6%

--------------------------------------------------------------------------------

14. Type of Reporting Person: IN

--------------------------------------------------------------------------------

(1) 178,520 shares held in William E. Oberndorf's Individual Retirement
Accounts, which are self-directed, 375,000 shares are beneficially owned solely
in his capacity as sole general partner of Oberndorf Family Partners, a family
partnership, and 30,000 shares are owned by his children who share his
household.

(2) Of these, 6,695,000 shares are beneficially owned solely in his capacity as
one of three controlling persons of SPO Advisory Corp., 1,211,700 shares are
held in two trusts for the benefit of himself and his wife, Susan C. Oberndorf,
for which he serves as trustee, and 855 shares are held in his wife's Individual
Retirement Account.

CUSIP NO. 029912201 Page 12 of 26
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1. Name of Reporting Person:

William J. Patterson

--------------------------------------------------------------------------------

2. Check the Appropriate Box if a Member of a Group:
(a) [_]

(b) [X]

--------------------------------------------------------------------------------

3. SEC Use Only

--------------------------------------------------------------------------------

4. Source of Funds: Not Applicable

--------------------------------------------------------------------------------

5. Check box if Disclosure of Legal Proceedings is
Required Pursuant to Items 2(e) or 2(f):
[_]

--------------------------------------------------------------------------------

6. Citizenship or Place of Organization: USA

-----------------------------------------------------------

Number of 7. Sole Voting Power: -0-
Shares
-----------------------------------------------------------

Beneficially 8. Shared Voting Power: 6,695,000 (1)
Owned By
-----------------------------------------------------------
Each
Reporting 9. Sole Dispositive Power: -0-

-----------------------------------------------------------
Person
With 10. Shared Dispositive Power: 6,695,000 (1)

--------------------------------------------------------------------------------

11. Aggregate Amount Beneficially Owned by Each Reporting Person:
6,695,000 (1)

--------------------------------------------------------------------------------

12. Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares:
[_]

--------------------------------------------------------------------------------

13. Percent of Class Represented by Amount in Row (11): 3.6%

--------------------------------------------------------------------------------

14. Type of Reporting Person: IN

--------------------------------------------------------------------------------

(1) These 6,695,000 shares are beneficially owned solely in his capacity
as one of three controlling persons of SPO Advisory Corp.

CUSIP NO. 029912201 Page 13 of 26
--------------------------------------------------------------------------------

1. Name of Reporting Person:

David M. Kashen

--------------------------------------------------------------------------------

2. Check the Appropriate Box if a Member of a Group:
(a) [_]

(b) [X]

--------------------------------------------------------------------------------

3. SEC Use Only

--------------------------------------------------------------------------------

4. Source of Funds: PF

--------------------------------------------------------------------------------

5. Check box if Disclosure of Legal Proceedings is
Required Pursuant to Items 2(e) or 2(f):
[_]

--------------------------------------------------------------------------------

6. Citizenship or Place of Organization: USA

-----------------------------------------------------------

Number of 7. Sole Voting Power: 4,000
Shares
-----------------------------------------------------------

Beneficially 8. Shared Voting Power: -0-
Owned By
-----------------------------------------------------------
Each
Reporting 9. Sole Dispositive Power: 4,000

-----------------------------------------------------------
Person
With 10. Shared Dispositive Power: -0-

--------------------------------------------------------------------------------

11. Aggregate Amount Beneficially Owned by Each Reporting Person:
4,000

--------------------------------------------------------------------------------

12. Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares:
[_]

--------------------------------------------------------------------------------

13. Percent of Class Represented by Amount in Row (11): **0.1%

--------------------------------------------------------------------------------

14. Type of Reporting Person: IN

--------------------------------------------------------------------------------

** Denotes less than.

CUSIP NO. 029912201 Page 14 of 26
--------------------------------------------------------------------------------

1. Name of Reporting Person:

Jane Y. Liou

--------------------------------------------------------------------------------

2. Check the Appropriate Box if a Member of a Group:

(a) [_]

(b) [X]

--------------------------------------------------------------------------------

3. SEC Use Only

--------------------------------------------------------------------------------

4. Source of Funds: PF

--------------------------------------------------------------------------------

5. Check box if Disclosure of Legal Proceedings is
Required Pursuant to Items 2(e) or 2(f):

[_]

--------------------------------------------------------------------------------

6. Citizenship or Place of Organization: USA

----------------------------------------------------------------

Number of 7. Sole Voting Power: 3,750
Shares
----------------------------------------------------------------

Beneficially 8. Shared Voting Power: -0-
Owned By
----------------------------------------------------------------

Each 9. Sole Dispositive Power: 3,750
Reporting
----------------------------------------------------------------
Person
With 10. Shared Dispositive Power: -0-

--------------------------------------------------------------------------------

11. Aggregate Amount Beneficially Owned by Each Reporting Person:
3,750

--------------------------------------------------------------------------------

12. Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares:
[_]

--------------------------------------------------------------------------------

13. Percent of Class Represented by Amount in Row (11): **0.1%

--------------------------------------------------------------------------------

14. Type of Reporting Person: IN

--------------------------------------------------------------------------------

** Denotes less than.

CUSIP NO. 029912201 Page 15 of 26
--------------------------------------------------------------------------------

1. Name of Reporting Person:

Edward H. McDermott

--------------------------------------------------------------------------------

2. Check the Appropriate Box if a Member of a Group:

(a) [_]

(b) [X]

--------------------------------------------------------------------------------

3. SEC Use Only

--------------------------------------------------------------------------------

4. Source of Funds: PF

--------------------------------------------------------------------------------

5. Check box if Disclosure of Legal Proceedings is
Required Pursuant to Items 2(e) or 2(f):

[_]

--------------------------------------------------------------------------------

6. Citizenship or Place of Organization: USA

----------------------------------------------------------------

Number of 7. Sole Voting Power: 4,900
Shares
----------------------------------------------------------------

Beneficially 8. Shared Voting Power: -0-
Owned By
----------------------------------------------------------------

Each 9. Sole Dispositive Power: 4,900
Reporting
----------------------------------------------------------------
Person
With 10. Shared Dispositive Power: -0-

--------------------------------------------------------------------------------

11. Aggregate Amount Beneficially Owned by Each Reporting Person:
4,900

--------------------------------------------------------------------------------

12. Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares:
[_]

--------------------------------------------------------------------------------

13. Percent of Class Represented by Amount in Row (11): **0.1%

--------------------------------------------------------------------------------

14. Type of Reporting Person: IN

--------------------------------------------------------------------------------

** Denotes less than.

CUSIP NO. 029912201 Page 16 of 26
--------------------------------------------------------------------------------

1. Name of Reporting Person:

Kurt C. Mobley

--------------------------------------------------------------------------------

2. Check the Appropriate Box if a Member of a Group:

(a) [_]

(b) [X]

--------------------------------------------------------------------------------

3. SEC Use Only

--------------------------------------------------------------------------------

4. Source of Funds: PF

--------------------------------------------------------------------------------

5. Check box if Disclosure of Legal Proceedings is
Required Pursuant to Items 2(e) or 2(f):

[_]

--------------------------------------------------------------------------------

6. Citizenship or Place of Organization: USA

-------------------------------------------------------

Number of
Shares 7. Sole Voting Power: 16,000

-------------------------------------------------------

Beneficially 8. Shared Voting Power: -0-
Owned By
-------------------------------------------------------
Each
Reporting 9. Sole Dispositive Power: 16,000

-------------------------------------------------------
Person
With 10. Shared Dispositive Power: -0-

--------------------------------------------------------------------------------

11. Aggregate Amount Beneficially Owned by Each Reporting Person:
16,000

--------------------------------------------------------------------------------

12. Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares:

[_]

--------------------------------------------------------------------------------

13. Percent of Class Represented by Amount in Row (11): ** 0.1%

--------------------------------------------------------------------------------

14. Type of Reporting Person: IN

--------------------------------------------------------------------------------

**Denotes less than.

CUSIP NO. 029912201 Page 17 of 26
--------------------------------------------------------------------------------

1. Name of Reporting Person:

Michael B. Yuen

--------------------------------------------------------------------------------

2. Check the Appropriate Box if a Member of a Group:

(a) [_]

(b) [X]
--------------------------------------------------------------------------------

3. SEC Use Only

--------------------------------------------------------------------------------

4. Source of Funds: PF

--------------------------------------------------------------------------------

5. Check box if Disclosure of Legal Proceedings is
Required Pursuant to Items 2(e) or 2(f):

[_]

--------------------------------------------------------------------------------

6. Citizenship or Place of Organization: USA

------------------------------------------------------

Number of 7. Sole Voting Power: 3,700
Shares
------------------------------------------------------

Beneficially 8. Shared Voting Power: -0-
Owned By
------------------------------------------------------
Each
Reporting 9. Sole Dispositive Power: 3,700

Person ------------------------------------------------------
With 10. Shared Dispositive Power: -0-

--------------------------------------------------------------------------------

11. Aggregate Amount Beneficially Owned by Each Reporting Person:
3,700

--------------------------------------------------------------------------------

12. Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares:

[_]

--------------------------------------------------------------------------------

13. Percent of Class Represented by Amount in Row (11): ** 0.1%

--------------------------------------------------------------------------------

14. Type of Reporting Person: IN

--------------------------------------------------------------------------------

**Denotes less than.

This Amendment No. 1 amends the Schedule 13D (the "Original 13D") filed
with the Securities Exchange Commission ("SEC") on February 14, 2002. Unless
otherwise stated herein, the Original 13D, as previously amended, remains in
full force and effect. Terms used herein and not defined herein shall have the
meanings ascribed thereto in the Original 13D.

Item 3. Source and Amount of Funds or Other Consideration.

Item 3 is hereby amended and restated as follows:

The source and amount of the funds used or to be used by the Reporting
Persons to purchase Shares are as follows:

Name Source of Funds Amount of Funds
---- --------------- ---------------

SPO Working Capital (1) $ 42,985,915.49

SPO Advisory Partners Not Applicable Not Applicable

SFP Working Capital (1) $ 6,297,543.64

SPO Advisory Partners Not Applicable Not Applicable

SPO Advisory Corp. Not Applicable Not Applicable

CLP Working Capital (1) $ 3,619,681.32

DLW Working Capital (1) $ 1,512,954.52

PS Foundation Working Capital (1) $ 7,138,426.47

JHS Personal Funds (2) $ 7,519,303.28

WEO Personal Funds (2) $ 8,725,111.49

WJP Not Applicable Not Applicable

DMK Personal Funds (2) $ 21,426.70

JYL Personal Funds (2) $ 26,233.00

EHM Personal Funds (2) $ 26,989.90

KCM Personal Funds (2) $ 89,620.10

MBY Personal Funds (2) $ 14,911.00
___________

(1) As used herein, the term "Working Capital" includes income from the
business operations of the entity plus sums borrowed from banks and brokerage
firm margin accounts to operate such business in general. None of the funds
reported herein as "Working Capital" were borrowed or otherwise obtained for the
specific purpose of acquiring, handling, trading or voting the Shares.

(2) As used herein, the term "Personal Funds" includes sums borrowed
from banks and brokerage firm margin accounts, none of which were borrowed or
otherwise obtained for the specific purpose of acquiring, handling, trading or
voting the Shares.

Item 5. Interest in Securities of the Issuer.

Item 5 is hereby amended and restated as follows:

(a) Percentage interest calculations for each Reporting Person are based upon
the Issuer having 185,046,365 total outstanding shares of Class A Common Stock,
as reported on the Issuer's 10-Q filed with the Securities Exchange Commission
on May 15, 2002.

SPO

The aggregate number of Shares that SPO owns beneficially, pursuant to
Rule 13d-3 of the Act, is 5,752,300 Shares, which constitutes approximately 3.1%
of the outstanding Shares.

SPO Advisory Partners

Because of its position as the sole general partner of SPO, SPO
Advisory Partners may, pursuant to Rule 13d-3 of the Act, be deemed to be the
beneficial owner of 5,752,300 Shares, which constitutes approximately 3.1% of
the outstanding Shares.

SFP

The aggregate number of Shares that SFP owns beneficially, pursuant to
Rule 13d-3 of the Act, is 942,700 Shares, which constitutes approximately 0.5%
of the outstanding Shares.

SF Advisory Partners

Because of its position as the sole general partner of SFP, SF Advisory
Partners may, pursuant to Rule 13d-3 of the Act, be deemed to be the beneficial
owner of 942,700 Shares, which constitutes approximately 0.5% of the outstanding
Shares.

SPO Advisory Corp.

Because of its positions as the general partner of each of SPO Advisory
Partners and SF Advisory Partners, SPO Advisory Corp. may, pursuant to Rule
13d-3 of the Act, be deemed to be the beneficial owner of 6,695,000 Shares in
the aggregate, which constitutes approximately 3.6% of the outstanding Shares.

CLP

The aggregate number of Shares that CLP owns beneficially, pursuant to
Rule 13d-3 of the Act, is 792,700 Shares, which constitutes approximately 0.4%
of the outstanding Shares.

DLW

The aggregate number of Shares that DLW owns beneficially, pursuant to
Rule 13d-3 of the Act, is 256,400 Shares, which constitutes approximately 0.1%
of the outstanding Shares.

PS Foundation

The aggregate number of Shares that PS Foundation owns beneficially,
pursuant to Rule 13d-3 of the Act, is 906,200 Shares, which constitutes
approximately 0.5% of the outstanding Shares.

JHS

Individually, and because of his positions as a control person of SPO
Advisory Corp., CLP, DLW, and PS Foundation, JHS may, pursuant to Rule 13d-3 of
the Act, be deemed to be the beneficial owner of 10,290,640 Shares, which
constitutes approximately 5.6% of the outstanding Shares.

WEO

Individually, and because of his positions as a control person of SPO
Advisory Corp. and Oberndorf Family Partners, WEO may, pursuant to Rule 13d-3 of
the Act, be deemed to be the beneficial owner of 8,491,075 Shares in the
aggregate, which constitutes approximately 4.6% of the outstanding Shares.

WJP

Because of his position as a control person of SPO Advisory Corp., WJP
may, pursuant to Rule 13d-3 of the Act, be deemed to be the beneficial owner of
6,695,000 Shares in the aggregate, which constitutes approximately 3.6% of the
outstanding Shares.

DMK

The aggregate number of Shares that DMK owns beneficially, pursuant to
Rule 13d-3 of the Act, is 4,000 Shares, which constitutes less than 0.1% of the
outstanding Shares.

JYL

The aggregate number of shares that JYL owns beneficially, pursuant to
Rule 13d-3 of the Act, is 3,750 Shares, which constitutes less than 0.1% of the
outstanding Shares.

EHM

The aggregate number of shares that EHM owns beneficially, pursuant to
Rule 13d-3 of the Act, is 4,900 Shares, which constitutes less than 0.1% of the
outstanding Shares.

KCM

The aggregate number of shares that KCM owns beneficially, pursuant to
Rule 13d-3 of the Act, is 16,000 Shares, which constitutes less than 0.1% of the
outstanding Shares.

MBY

The aggregate number of shares that MBY owns beneficially, pursuant to
Rule 13d-3 of the Act, is 3,700 Shares, which constitutes less than 0.1% of the
outstanding Shares.

To the best of the knowledge of each of the Reporting Persons, other
than as set forth above, none of the persons named in Item 2 hereof is the
beneficial owner of any Shares.

(b)

SPO

Acting through its sole general partner, SPO has the sole power to vote
or to direct the vote and to dispose or to direct the disposition of 5,752,300
Shares.

SPO Advisory Partners

Acting through its two general partners and in its capacity as the sole
general partner of SPO, SPO Advisory Partners has the sole power to vote or to
direct the vote and to dispose or to direct the disposition of 5,752,300 Shares.

SFP

Acting through its sole general partner, SFP has the sole power to vote
or to direct the vote and to dispose or to direct the disposition of 942,700
Shares.

SF Advisory Partners

Acting through its general partner and in its capacity as the sole
general partner of SFP, SF Advisory Partners has the sole power to vote or to
direct the vote and to dispose or to direct the disposition of 942,700 Shares.

SPO Advisory Corp.

Acting through its controlling persons and in its capacities as the
general partner of each of SPO Advisory Partners and SF Advisory Partners, SPO
Advisory Corp. has the sole power to vote or to direct the vote and to dispose
or to direct the disposition of 6,695,000 Shares in the aggregate.

CLP

Acting through its sole general partner, CLP has the sole power to vote
or to direct the vote and to dispose or to direct the disposition of 792,700
Shares.

DLW

Acting through its controlling person, DLW has the sole power to vote
or to direct the vote and to dispose or to direct the disposition of 256,400
Shares.

PS Foundation

Acting through its controlling person, PS Foundation has the sole power
to vote or to direct the vote and to dispose or to direct the disposition of
906,200 Shares.

JHS

As one of three controlling persons of SPO Advisory Corp., which is the
general partner of each of SPO Advisory Partners and SF Advisory Partners, JHS
may be deemed to have shared power with WEO and WJP to vote or to direct the
vote and to dispose or to direct the disposition of 6,695,000 Shares held by SPO
and SFP in the aggregate. Because of his positions as a control person of CLP,
DLW, and PS Foundation, JHS may be deemed to have shared power to vote or to
direct the vote and to dispose or to direct the disposition of 1,955,300 Shares
held by CLP, DLW, and PS Foundation in the aggregate. JHS has the sole power to
vote or to direct the vote and to dispose or to direct the disposition of
1,640,340 Shares.

WEO

Individually, and because of his position as the sole general partner
of Oberndorf Family Partners, a family partnership, WEO has the sole power to
vote or to direct the vote and to dispose or to direct the disposition of
583,520 Shares. As one of three controlling persons of SPO Advisory Corp., which
is the general partner of each of SPO Advisory Partners and SF Advisory
Partners, WEO may be deemed to have shared power with JHS and WJP to vote or to
direct the vote and to dispose or to direct the disposition of 6,695,000 Shares
held by SPO and SFP in the aggregate. WEO may be deemed to have shared power to
vote or to direct the vote and to dispose or to direct the disposition of
1,211,700 Shares held in a trust for himself and his wife Susan C. Oberndorf and
855 Shares held in his wife's Individual Retirement Account.

WJP

As one of three controlling persons of SPO Advisory Corp., which is the
general partner of each of SPO Advisory Partners and SF Advisory Partners, WJP
may be deemed to have shared power with JHS and WEO to vote or to direct the
vote and to dispose or to direct the disposition of 6,695,000 Shares held by SPO
and SFP in the aggregate.

DMK

DMK has the sole power to vote or to direct the vote and to dispose or
to direct the disposition of 4,000 Shares.

JYL

JYL has the sole power to vote or to direct the vote and to dispose or
to direct the disposition of 3,750 Shares.

EHM

EHM has the sole power to vote or to direct the vote and to dispose or
to direct the disposition of 4,900 Shares.

KCM

KCM has the sole power to vote or to direct the vote and to dispose or
to direct the disposition of 16,000 Shares.

MBY

MBY has the sole power to vote or to direct the vote and to dispose or
to direct the disposition of 3,700 Shares.

(c) During the past sixty (60) days, the Reporting Persons purchased
Shares in open market transactions on the New York Stock Exchange ("NYSE") as
set forth on Schedule I attached hereto.

Except as set forth in this paragraph (c), to the best of the knowledge
of each of the Reporting Persons, none of the persons named in response to
paragraph (a) has effected any transactions in Shares during the past sixty (60)
days.

(d) Each of the Reporting Persons affirms that no person other than
such Reporting Person has the right to receive or the power to direct the
receipt of distributions with respect to, or the proceeds from the sale of, the
Shares owned by such Reporting Person.

(e) It is inapplicable for the purposes herein to state the date on
which the Reporting Persons ceased to be the owners of more than five percent
(5%) of the outstanding Shares.

Item 7. Material to be Filed as Exhibits.

Exhibit A - Agreement pursuant to Rule 13d-1(f)(1)(iii)

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.

DATED: July 16, 2002

/s/ Phillip Gordon
------------------
Phillip Gordon

Attorney-in-Fact for:

SPO PARTNERS II, L.P. *
SPO ADVISORY PARTNERS, L.P. *
SAN FRANCISCO PARTNERS II, L.P. *
SF ADVISORY PARTNERS, L.P. *
SPO ADVISORY CORP. *
CRANBERRY LAKE PARTNERS, L.P. *
D. L. & W., INC. PROFIT SHARING RETIREMENT PLAN *
PHOEBE SNOW FOUNDATION, INC. *
JOHN H. SCULLY *
WILLIAM E. OBERNDORF *
WILLIAM J. PATTERSON *
DAVID M. KASHEN *
JANE Y. LIOU *
EDWARD H. MCDERMOTT *
KURT C. MOBLEY *
MICHAEL B. YUEN *

* A Power of Attorney authorizing Phillip Gordon to act on
behalf of this person or entity has been previously
filed with the Securities and Exchange Commission.

SCHEDULE I TO
SCHEDULE 13D AMENDMENT NO. 1
FOR
SPO PARTNERS & CO.

Date of Number of Price Per Where/How
Reporting Person Transaction Type Shares Share ($) Transaction Effected
---------------- ----------- ---- ------ --------- --------------------

Cranberry Lake
Partners, L.P. 06/25/2002 Buy 288,000 3.19 Open Market/Broker
06/26/2002 Buy 66,000 2.98 Open Market/Broker
07/11/2002 Buy 26,900 2.22 Open Market/Broker
07/12/2002 Buy 133,300 2.35 Open Market/Broker
07/15/2002 Buy 43,400 2.08 Open Market/Broker

John H. Scully 06/25/2002 Buy 577,000 3.19 Open Market/Broker
06/26/2002 Buy 134,000 2.98 Open Market/Broker
07/11/2002 Buy 52,340 2.22 Open Market/Broker
07/12/2002 Buy 258,700 2.35 Open Market/Broker
07/15/2002 Buy 84,200 2.08 Open Market/Broker

William E.
Oberndorf 07/12/2002 Buy 86,700 2.23 Open Market/Broker

David M. Kashen 05/16/2002 Buy 500 3.82 Open Market/Broker

EXHIBIT INDEX

Exhibit Document Description Page No.

A Agreement Pursuant to Rule 13d-1(f)(1)(iii) 1

Exhibit A

Pursuant to Rule 13d-1(f)(1)(iii) of Regulation 13D-G of the General Rules
and Regulations of the Securities and Exchange Commission under the Securities
Exchange Act of 1934, as amended, the undersigned agrees that the statement to
which this Exhibit is attached is filed on behalf of each of them in the
capacities set forth below.

DATED: July 16, 2002

/s/ Phillip Gordon
------------------
Phillip Gordon

Attorney-in-Fact for:

SPO PARTNERS II, L.P. *
SPO ADVISORY PARTNERS, L.P. *
SAN FRANCISCO PARTNERS II, L.P. *
SF ADVISORY PARTNERS, L.P. *
SPO ADVISORY CORP. *
CRANBERRY LAKE PARTNERS, L.P. *
D. L. & W., INC. PROFIT SHARING RETIREMENT PLAN *
PHOEBE SNOW FOUNDATION, INC. *
JOHN H. SCULLY *
WILLIAM E. OBERNDORF *
WILLIAM J. PATTERSON *
DAVID KASHEN *
JANE Y. LIOU *
EDWARD H. MCDERMOTT *
KURT C. MOBLEY *
MICHAEL B. YUEN *

* A Power of Attorney authorizing Phillip Gordon to act on
behalf of this person or entity has been previously
filed with the Securities and Exchange Commission.

Exhibits: Page 1