0000891836-11-000003 SC 13D/A 1 20110106 20110106 EDWARD H. MCDERMOTT J. STUART RYAN JOHN H. SCULLY PHOEBE SNOW FOUNDATION, INC. SF ADVISORY PARTNERS, L.P. SPO ADVISORY PARTNERS, L.P. SPO FRANCISCO PARTNERS L.P. SPO PARTNERS II CO-INVESTMENT PARTNERSHIP, L.P. SPO PARTNERS II, L.P. WILLIAM E. OBERNDORF SPO ADVISORY CORP 0000919468 680247274 DE 1231 SC 13D/A 591 REDWOOD HIGHWAY SUITE 3215 MILL VALLEY CA 94941 4153836600 SF ADVISORY CORP 19990329 CALPINE CORP 0000916457 4911 770212977 DE 1231 SC 13D/A 34 005-48317 11514924 717 TEXAS AVENUE SUITE 1000 HOUSTON TX 77002 7138308775 717 TEXAS AVENUE SUITE 1000 HOUSTON TX 77002 SC 13D/A 1 sc0001-11.htm SCHEDULE 13D, AMENDMENT #7