Hydroelectric Dam of Uttar Pradesh
(Trick: Ri O Ma Ra)
Ri- Rihand Dam (1962- Sonbhadra at 'Ganga' )
O- Obra Dam (1970- Sonbhadra at 'Ganga' )
Ma- Matatila Dam (1958- Lalitpur at 'Ganga' )
Ra- Rajghat Dam (2000- Lalitpur at 'Ganga' )