Mejenin 4
| Dam Name | Mejenin 4 |
| River | Mejenin |
| Main Basin | Mediterranean Coast |
| Sub Basin | Jeffara |
| Near City | Tripoli |
| Administration City | Gharyan |
| Country | Libya |
| Year | 1972 |
| Dam Height | 42 |
| Dam Length | -99 |
| Area(Sqkm) | 0.4 |
| Area(Polygonal) | 0.4 |
| Capital Expenditure | 58 |
| Depth(M) | 145 |
| Avg Displacement Of Water | 294 |
| Catchment Area In Sqkm | 566 |
| Main Usage | Irrigation |
| Status | 4: Poor |
| Longitude | 13.247917 |
| Latitude | 32.295417 |
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