US Army Corps of Engineers

Lower Granite Dam & Lake

May 2020

Day of MonthTotal Generation MWhAverage Generation MWStation Use MWhInflow kcfsTotal Outflow kcfsGeneration Flow kcfsSpill kcfsMidnight Reservoir ElevationAverage Forebay ElevationAverage Tailwater ElevationAverage Head feetMidnight Lewiston Gage ft
1 9086 379 33 115.40 115.70 53.50 61.70 734.81 735.12 635.91 99.21 736.03
2 8583 358 33 111.80 112.10 50.80 60.90 734.73 734.63 635.50 99.13 735.42
3 7277 303 34 106.10 104.90 43.10 61.40 735.03 734.97 635.50 99.47 735.89
4 7024 293 34 102.30 103.80 41.70 61.70 734.68 734.85 635.20 99.65 735.43
5 5577 232 34 92.90 93.80 32.50 60.80 734.45 734.73 634.62 100.11 735.27
6 5229 218 35 88.40 86.90 30.70 55.90 734.82 734.64 634.52 100.12 735.59
7 5261 219 35 90.60 90.60 30.90 59.20 734.82 734.76 634.58 100.18 735.58
8 4948 206 34 85.70 86.80 28.70 57.70 734.54 734.71 634.40 100.31 735.18
9 4980 208 34 83.50 82.80 29.00 53.40 734.72 734.70 634.24 100.46 735.42
10 5001 208 33 85.20 83.10 29.20 53.50 735.24 734.89 634.50 100.39 735.98
11 6232 260 34 93.40 97.00 36.60 60.00 734.34 734.91 635.02 99.89 735.34
12 6539 272 34 103.40 102.20 38.50 63.20 734.64 734.32 634.92 99.40 735.36
13 8056 336 34 111.50 112.40 48.00 63.90 734.42 734.68 635.57 99.11 735.55
14 7867 328 34 110.40 111.40 46.80 64.10 734.17 734.26 635.38 98.88 735.28
15 6263 261 34 102.70 101.80 36.60 64.80 734.40 734.60 635.13 99.47 735.59
16 5562 232 34 98.90 97.90 32.50 64.90 734.64 734.61 635.02 99.59 735.61
17 5418 226 33 94.10 94.00 31.80 61.90 734.67 734.57 635.06 99.51 735.63
18 5497 229 34 95.90 97.10 32.70 63.90 734.38 734.26 634.89 99.37 735.26
19 6980 291 33 109.00 113.20 41.80 70.90 733.34 733.73 635.42 98.31 734.76
20 8097 337 34 115.10 114.80 48.70 65.60 733.42 733.41 635.51 97.90 734.69
21 10600 442 33 134.70 132.50 63.90 68.10 733.96 733.66 636.34 97.32 735.44
22 135.70 131.30 53.50 77.30 735.07 734.44 636.10 98.34 736.30
23 120.00 123.40 62.60 60.40 734.23 734.67 636.36 98.31 735.47
24 104.90 103.20 43.80 59.00 734.66 734.39 635.28 99.11 735.43
25 102.00 101.30 41.90 58.90 734.83 734.78 635.04 99.74 735.75
26 100.90 101.20 38.20 62.40 734.77 734.75 635.12 99.63 735.73
27 108.50 110.00 49.10 60.50 734.39 734.91 635.62 99.29 735.62
28 116.70 113.20 52.00 60.70 735.23 734.83 635.67 99.16 736.48
29
30
31
TOT140077  708         
AVG 6670 278 34 104.28 104.23 41.75 62.03 734.55 734.56 635.23 99.33 735.54
MAX 10600   135.70 132.50 63.90 77.30 735.24 735.12 636.36 100.46 736.48
MIN 4948   83.50 82.80 28.70 53.40 733.34 733.41 634.24 97.32 734.69