John Day & Lake Umatilla
January 2026
| Day of Month | Total Generation MWh | Average Generation MW | Station Use MWh | Inflow kcfs | Total Outflow kcfs | Generation Flow kcfs | Spill kcfs | Midnight Reservoir Elevation | Average Forebay Elevation | Average Tailwater Elevation | Average Head feet |
|---|
| 1 | 36060 | 1502 | 50 | 199.50 | 194.30 | 193.30 | 0.00 | 265.22 | 265.11 | 161.65 | 103.46 |
| 2 | 36029 | 1501 | 49 | 197.80 | 195.10 | 194.10 | 0.00 | 265.32 | 265.30 | 162.28 | 103.02 |
| 3 | 35555 | 1481 | 49 | 192.20 | 192.20 | 191.30 | 0.00 | 265.32 | 265.25 | 162.08 | 103.17 |
| 4 | 35651 | 1485 | 48 | 198.00 | 192.70 | 191.90 | 0.00 | 265.52 | 265.41 | 162.28 | 103.13 |
| 5 | 35275 | 1470 | 50 | 188.30 | 190.90 | 190.00 | 0.00 | 265.42 | 265.39 | 162.42 | 102.97 |
| 6 | 36293 | 1512 | 50 | 186.70 | 194.50 | 193.70 | 0.00 | 265.12 | 265.38 | 161.50 | 103.88 |
| 7 | 37092 | 1545 | 50 | 183.10 | 201.40 | 200.70 | 0.00 | 264.42 | 264.84 | 162.27 | 102.57 |
| 8 | 35189 | 1466 | 51 | 199.10 | 191.30 | 190.40 | 0.00 | 264.72 | 264.47 | 161.91 | 102.56 |
| 9 | 37470 | 1561 | 50 | 225.70 | 202.20 | 201.40 | 0.00 | 265.62 | 265.17 | 161.92 | 103.25 |
| 10 | 38052 | 1585 | 51 | 205.80 | 205.80 | 204.80 | 0.00 | 265.62 | 265.68 | 162.53 | 103.15 |
| 11 | 38326 | 1597 | 50 | 201.10 | 206.40 | 205.60 | 0.00 | 265.42 | 265.53 | 162.04 | 103.49 |
| 12 | 38137 | 1589 | 51 | 201.20 | 206.40 | 205.70 | 0.00 | 265.22 | 265.29 | 162.33 | 102.96 |
| 13 | 36423 | 1518 | 51 | 192.40 | 197.60 | 196.70 | 0.00 | 265.02 | 265.16 | 162.39 | 102.77 |
| 14 | 36034 | 1501 | 52 | 197.40 | 194.90 | 194.00 | 0.00 | 265.12 | 265.03 | 161.88 | 103.15 |
| 15 | 36854 | 1536 | 51 | 206.70 | 198.90 | 198.10 | 0.00 | 265.42 | 265.18 | 161.92 | 103.26 |
| 16 | 38570 | 1607 | 50 | 222.10 | 209.00 | 208.10 | 0.00 | 265.92 | 265.69 | 162.61 | 103.08 |
| 17 | 39095 | 1629 | 51 | 209.70 | 212.30 | 211.50 | 0.00 | 265.82 | 265.99 | 163.09 | 102.90 |
| 18 | 38197 | 1592 | 52 | 207.50 | 207.50 | 206.70 | 0.00 | 265.82 | 265.70 | 162.94 | 102.76 |
| 19 | 38125 | 1589 | 52 | 208.50 | 205.90 | 205.00 | 0.00 | 265.92 | 265.83 | 162.64 | 103.19 |
| 20 | 38597 | 1608 | 53 | 209.00 | 206.40 | 205.50 | 0.00 | 266.02 | 266.11 | 161.98 | 104.13 |
| 21 | | | | 201.30 | 201.30 | 200.50 | 0.00 | 266.02 | 265.98 | 162.23 | 103.75 |
| 22 | | | | 208.70 | 213.90 | 213.20 | 0.00 | 265.82 | 265.86 | 162.82 | 103.04 |
| 23 | | | | 204.30 | 206.90 | 205.90 | 0.00 | 265.72 | 265.81 | 162.10 | 103.71 |
| 24 | | | | 197.10 | 207.60 | 206.70 | 0.00 | 265.32 | 265.48 | 162.01 | 103.47 |
| 25 | | | | 182.60 | 208.70 | 207.70 | 0.00 | 264.32 | 264.66 | 162.59 | 102.07 |
| 26 | | | | 185.30 | 182.60 | 181.90 | 0.00 | 264.42 | 264.12 | 161.71 | 102.41 |
| 27 | | | | 192.50 | 171.60 | 170.70 | 0.00 | 265.22 | 264.81 | 161.22 | 103.59 |
| 28 | | | | | | | | | | | |
| 29 | | | | | | | | | | | |
| 30 | | | | | | | | | | | |
| 31 | | | | | | | | | | | |
|
| TOT | 741024 | | 1011 | | | | | | | | |
| AVG | 37051 | 1544 | 51 | 200.13 | 199.94 | 199.08 | 0.00 | 265.36 | 265.34 | 162.20 | 103.14 |
|
| MAX | 39095 | | | 225.70 | 213.90 | 213.20 | 0.00 | 266.02 | 266.11 | 163.09 | 104.13 |
| MIN | 35189 | | | 182.60 | 171.60 | 170.70 | 0.00 | 264.32 | 264.12 | 161.22 | 102.07 |