US Army Corps of Engineers

John Day & Lake Umatilla

February 2026

Day of MonthTotal Generation MWhAverage Generation MWStation Use MWhInflow kcfsTotal Outflow kcfsGeneration Flow kcfsSpill kcfsMidnight Reservoir ElevationAverage Forebay ElevationAverage Tailwater ElevationAverage Head feet
1 31773 1324 52 159.70 172.80 171.80 0.00 264.52 264.75 161.91 102.84
2 30821 1284 53 161.80 167.00 166.10 0.00 264.32 264.42 161.45 102.97
3 30112 1255 52 158.10 163.30 162.50 0.00 264.12 264.22 161.47 102.75
4 30048 1252 50 164.90 162.60 161.70 0.00 264.12 264.09 161.08 103.01
5 31482 1312 51 176.70 171.40 170.50 0.00 264.32 264.34 161.88 102.46
6 31310 1305 50 169.50 169.50 168.70 0.00 264.32 264.32 161.43 102.89
7 29988 1249 52 162.30 162.30 161.30 0.00 264.32 264.33 161.30 103.03
8 30249 1260 52 161.20 163.90 162.90 0.00 264.21 264.25 161.29 102.96
9 28374 1182 52 157.80 152.60 151.60 0.00 264.42 264.38 160.64 103.74
10 28610 1192 52 153.40 153.40 152.90 0.00 264.42 264.57 160.93 103.64
11 29035 1210 53 158.70 156.10 155.70 0.00 264.52 264.36 161.04 103.32
12 32073 1336 53 189.70 171.40 171.10 0.00 265.22 264.97 161.16 103.81
13 31514 1313 52 166.10 168.60 168.20 0.00 265.12 265.31 161.52 103.79
14 29621 1234 51 160.90 158.30 157.90 0.00 265.22 265.17 161.29 103.88
15 31982 1333 52 171.70 171.70 171.10 0.00 265.22 265.27 161.72 103.55
16 32961 1373 51 165.80 176.20 175.90 0.00 264.82 264.99 161.22 103.77
17 33099 1379 51 184.30 176.90 176.40 0.00 265.10 264.91 161.02 103.89
18 34665 1444 52 182.90 185.00 184.40 0.00 265.02 265.18 160.96 104.22
19 33478 1395 52 180.20 180.10 179.70 0.00 265.02 264.97 161.61 103.36
20 33266 1386 51 183.60 178.40 177.90 0.00 265.22 265.22 161.33 103.89
21 34540 1439 51 160.70 186.80 186.30 0.00 264.22 264.76 161.77 102.99
22 32839 1368 51 177.70 177.70 177.50 0.00 264.22 264.21 161.29 102.92
23 35194 1466 51 200.60 190.10 189.90 0.00 264.62 264.38 161.36 103.02
24 33959 1415 51 199.10 183.50 183.20 0.00 265.22 265.03 161.97 103.06
25 35449 1477 52 198.50 190.70 190.20 0.00 265.52 265.36 161.82 103.54
26 34839 1452 51 184.80 187.40 186.80 0.00 265.42 265.45 161.86 103.59
27 33082 1378 52 182.80 177.50 176.90 0.00 265.62 265.50 161.62 103.88
28 34041 1418 50 189.90 182.10 181.60 0.00 265.92 265.86 161.78 104.08
TOT898406  1442        
AVG 32086 1337 52 173.69 172.76 172.17 0.00 264.80 264.81 161.42 103.39
MAX 35449   200.60 190.70 190.20 0.00 265.92 265.86 161.97 104.22
MIN 28374   153.40 152.60 151.60 0.00 264.12 264.09 160.64 102.46
BUILDING STRONG®