Big Jumbo Reservoir
| Reservoir Name | Big Jumbo |
| Dam Name | Julesburg 3 |
| River | Trib. Cottonwood Creek |
| Administration City | Colorado |
| Country | United States |
| Year | 1910 |
| Dam Height | 13 |
| Dam Length | 631 |
| Area(Sqkm) | 5.6 |
| Area(Polygonal) | 5.6 |
| Capital Expenditure | 47.6 |
| Depth(M) | 8.5 |
| Avg Displacement Of Water | 1 |
| Catchment Area In Sqkm | 18 |
| Main Usage | Irrigation |
| Multi Dams,C,10 | Yes |
| Status | 3: Fair |
| Longitude | -102.637083 |
| Latitude | 40.94125 |
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