| 年份 |
| 年发电量(亿kW·h) |
| 年弃水量(亿m3) | 保证率(%) | ||||
| 两河口 | 锦屏一级 | 二滩 | 梯级 | 两河口 | 锦屏一级 | 二滩 | 梯级 | ||
| 1956 | 91.37 | 136.46 | 114.08 | 341.91 | 0.00 | 0.00 | 0.00 | 0.00 | 77.78 |
| 1957 | 119.03 | 216.22 | 198.36 | 533.61 | 0.00 | 1.36 | 4.81 | 6.17 | 100.00 |
| 1958 | 93.91 | 191.16 | 171.12 | 456.19 | 0.00 | 0.00 | 0.00 | 0.00 | 97.22 |
| 1959 | 89.47 | 193.35 | 171.51 | 454.33 | 0.00 | 0.00 | 0.00 | 0.00 | 94.44 |
| 1960 | 124.01 | 219.89 | 199.42 | 543.32 | 0.00 | 24.48 | 21.21 | 45.69 | 94.44 |
| 1961 | 106.83 | 200.82 | 177.98 | 485.62 | 0.00 | 0.00 | 0.00 | 0.00 | 97.22 |
| 1962 | 131.75 | 215.74 | 196.11 | 543.60 | 0.65 | 62.05 | 67.26 | 129.97 | 100.00 |
| 1963 | 130.84 | 216.72 | 199.24 | 546.80 | 0.04 | 14.02 | 7.99 | 22.06 | 100.00 |
| 1964 | 124.44 | 229.51 | 211.82 | 565.77 | 0.05 | 43.56 | 42.09 | 85.70 | 100.00 |
| 1965 | 157.27 | 230.80 | 209.95 | 598.02 | 5.53 | 156.56 | 172.98 | 335.07 | 100.00 |
| 1966 | 123.06 | 221.42 | 201.35 | 545.82 | 0.00 | 62.24 | 65.57 | 127.81 | 100.00 |
| 1967 | 98.55 | 190.36 | 168.76 | 457.67 | 0.00 | 0.00 | 0.00 | 0.00 | 97.22 |
| 1968 | 102.66 | 218.23 | 196.37 | 517.25 | 0.00 | 45.83 | 45.21 | 91.04 | 100.00 |
| 1969 | 93.54 | 202.56 | 180.23 | 476.33 | 0.00 | 0.00 | 0.00 | 0.00 | 97.22 |
| 1970 | 106.19 | 217.07 | 197.54 | 520.80 | 0.00 | 1.11 | 0.63 | 1.74 | 100.00 |
| 1971 | 94.57 | 203.73 | 179.28 | 477.58 | 0.00 | 0.00 | 0.06 | 0.06 | 94.44 |
| 1972 | 89.48 | 179.79 | 159.52 | 428.79 | 0.00 | 0.00 | 0.00 | 0.00 | 88.89 |
| 1973 | 86.92 | 203.15 | 180.28 | 470.36 | 0.00 | 0.00 | 0.00 | 0.00 | 94.44 |
| 1974 | 119.23 | 225.83 | 204.06 | 549.12 | 0.00 | 80.27 | 87.32 | 167.59 | 100.00 |
| 1975 | 111.10 | 191.76 | 168.73 | 471.60 | 0.00 | 0.00 | 0.00 | 0.00 | 94.44 |
| 1976 | 110.84 | 200.99 | 179.68 | 491.51 | 0.00 | 0.05 | 0.06 | 0.11 | 97.22 |
| 1977 | 112.88 | 219.54 | 199.10 | 531.52 | 0.00 | 0.00 | 0.16 | 0.16 | 97.22 |
| 1978 | 91.87 | 223.20 | 200.66 | 515.73 | 0.00 | 0.84 | 0.00 | 0.84 | 100.00 |
| 1979 | 112.88 | 213.94 | 194.34 | 521.16 | 0.00 | 1.42 | 0.06 | 1.48 | 97.22 |
| 1980 | 134.05 | 231.12 | 210.68 | 575.85 | 0.04 | 54.73 | 56.23 | 111.00 | 100.00 |
| 1981 | 118.64 | 214.47 | 195.86 | 528.97 | 0.00 | 16.61 | 15.28 | 31.88 | 100.00 |
| 1982 | 119.08 | 209.85 | 192.71 | 521.63 | 0.00 | 1.56 | 0.52 | 2.09 | 100.00 |
| 1983 | 91.77 | 180.68 | 159.20 | 431.65 | 0.05 | 0.00 | 0.00 | 0.05 | 94.44 |
| 1984 | 92.50 | 207.72 | 184.90 | 485.11 | 0.00 | 0.00 | 0.00 | 0.00 | 100.00 |
| 1985 | 118.91 | 209.48 | 192.18 | 520.58 | 0.00 | 23.49 | 21.31 | 44.80 | 100.00 |