Arenal Reservoir
| Reservoir Name | Arenal |
| Dam Name | Arenal |
| River | Arenal |
| Main Basin | San Juan |
| Near City | Arenal |
| Administration City | Alajuela |
| Country | Costa Rica |
| Year | 1978 |
| Dam Height | 70 |
| Dam Length | 900 |
| Area(Sqkm) | 85.6 |
| Area(Polygonal) | 85.6 |
| Capital Expenditure | 2220 |
| Depth(M) | 25.9 |
| Avg Displacement Of Water | 20199 |
| Catchment Area In Sqkm | 499 |
| Main Usage | Hydroelectricity |
| Status | 3: Fair |
| Longitude | -84.762083 |
| Latitude | 10.474583 |
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