The Indravati Hydroelectric Project is located in Odisha (formerly Orissa). Key details:
- Located in the Kalahandi district of Odisha
- Built on the Indravati River, a tributary of the Godavari
- Has an installed capacity of 600 MW
- One of the largest hydroelectric projects in Eastern India
Other state projects for comparison:
- Tamil Nadu: Mettur Dam
- Karnataka: Sharavathi Project
- Andhra Pradesh: Srisailam Dam
Thus, the correct answer is (2) Orissa.