The Alamatti Dam is on the river

The Almatti (Alamatti/Lal Bahadur Shastri) Dam is constructed on the Krishna River. Official sources describe Almatti as a hydroelectric project on the Krishna River in North Karnataka [3]. The dam is explicitly identified as part of the Upper Krishna Irrigation Project, linking the Almatti structure to the Krishna basin and its irrigation/power network [1]. Reference material listing major projects confirms the Upper Krishna Project’s location as Krishna, which further corroborates Almatti’s siting on the Krishna River [2]. Combining these authoritative project and government descriptions confirms that the Almatti/Alamatti Dam is on the Krishna River, so option 3 (Krishna) is correct.

Sources

1. [3] https://bagalkot.nic.in/en/tourist-place/almatti-dam/
2. [1] Rajiv Ahir. A Brief History of Modern India (2019 ed.). SPECTRUM. > Chapter 39: After Nehru... > Economic Ideas > p. 660
3. [2] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 9: Distribution of World Natural Resources > 3. Regions with large Demand of electricity > p. 22