Ernestina
| Dam Name | Ernestina |
| River | Jacui |
| Main Basin | Jacui-Camaqua-Jaguaron |
| Near City | Passo Fundo |
| Administration City | Rio Grande do Sul |
| Country | Brazil |
| Year | 1954 |
| Dam Height | 13 |
| Dam Length | 400 |
| Area(Sqkm) | 30.7 |
| Area(Polygonal) | 30.7 |
| Capital Expenditure | 258 |
| Depth(M) | 8.4 |
| Avg Displacement Of Water | 26264 |
| Catchment Area In Sqkm | 1046 |
| Status | 3: Fair |
| Longitude | -52.545417 |
| Latitude | -28.554583 |
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