0000950131-99-000650 SC 13G 1 19990208 CALENERGY CO INC 0000720556 4991 942213782 DE 1231 SC 13G 34 005-39694 99523456 302 S 36TH ST STE 400 OMAHA NE 68131 4023414500 302 SOUTH 36TH STREET SUITE 400-A OMAHA NE 68131 CALIFORNIA ENERGY CO INC 19920703 WANGER ASSET MANAGEMENT LP 0000908733 0000 363820584 DE 1231 SC 13G 227 W MONROE STREET SUITE 3000 CHICAGO IL 60606 3126349230 227 W MONROE ST STE 3000 CHICAGO IL 60606 WANGER ASSET MANAGEMENT LP 19960619 SC 13G 1 000095013199000650-001-seq1-sc-13g.txt SCHEDULE 13G