EXHIBIT 21 SUBSIDIARIES OF REGISTRANT 1. Idaho Energy Resources Co., a Wyoming Corporation 2. IDACORP, Inc., an Idaho Corporation 3. IDACORP Financial Services, Inc., an Idaho Corporation 4. Ida-West Energy Company, an Idaho Corporation 5. Stellar Dynamics Inc., an Idaho Corporation 6. Idaho Power Resources Corporation, an Idaho Corporation 7. Applied Power Corporation, a Washington Corporation 8. Idaho Power Diversified Enterprises Company, an Idaho Corporation