0001005477-97-000274 SC 13G 1 19970212 NONE CALPINE CORP 0000916457 4991 770031605 CA 1231 SC 13G 34 005-48317 97527853 50 WEST SAN FERNANDO ST SAN JOSE CA 95113 4089955115 50 W SAN FERNANDO SUITE 500 SAN JOSE CA 95113 HARTFORD INVESTMENT MANAGEMENT CO /ADV 0000700635 061051282 CT 1231 SC 13G 200 HOPMEADOW STREET SIMSBURY CT 06070 8605472883 P O BOX 2999 HARTFORD CT 06104 HARTFORD INVESTMENT MANAGEMENT CO /ADV 19970103 SC 13G 1 000100547797000274-001-seq1-sc-13g.txt SCHEDULE 13G