Gyrinosvatnet Reservoir
| Reservoir Name | Gyrinosvatnet |
| Dam Name | Flavatn Dam |
| River | Lauvdola Flaavatn |
| Near City | Honefoss |
| Country | Norway |
| Year | 1959 |
| Dam Height | 30 |
| Dam Length | -99 |
| Area(Sqkm) | 14.7 |
| Area(Polygonal) | 14.7 |
| Capital Expenditure | 205 |
| Depth(M) | 13.9 |
| Avg Displacement Of Water | 2313 |
| Catchment Area In Sqkm | 182 |
| Main Usage | Hydroelectricity |
| Status | 2: Good |
| Longitude | 8.387917 |
| Latitude | 60.83625 |
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