| Boa Esperança Hydroelectric Power Station | |
| Dam Crosses: | Parnaíba River |
| Location: | Guadalupe, Piauí, Brazil |
| Dam Length: | 5212m (17,100feet) |
| Dam Height: | 53m (174feet) |
| Spillway Capacity: | 12000m3/s |
| Construction Began: | 1970 |
| Res Name: | Boa Esperança Reservoir |
| Res Capacity Total: | 5100000000m2 |
| Plant Capacity: | 237.3MW |
| Coordinates: | -6.7058°N -43.7364°W |
The Boa Esperança Hydroelectric Power Station (formerly known as Marshal Castelo Branco Hydroelectric Power Station) is a hydroelectric power station in the city of Guadalupe, Piauí in Brazil. It is located on the Parnaíba River.