| Annual | Elevation | Storage - Thousand Acre Feet | |||||
| Year | Rainfall | Average | Maximum | Minimum | Ave | Max | Min |
| 1988 | 22.81 | 511.13 | 514.95 | 507.57 | 377,351 | 456,451 | 310,207 |
| 1989 | 45.12 | 519.93 | 532.31 | 507.49 | 597,989 | 993,955 | 308,889 |
| 1990 | 48.79 | 523.98 | 536.64 | 519.54 | 709,539 | 1,176,526 | 570,835 |
| 1991 | 53.04 | 521.26 | 530.45 | 518.72 | 620,901 | 922,264 | 549,269 |
| 1992 | 42.26 | 522.77 | 530.14 | 520.42 | 666,093 | 910,685 | 595,271 |
| 1993 | 16.47 | 522.26 | 524.92 | 520.16 | 648,163 | 730,374 | 587,950 |
| 1994 | 46.94 | 522.64 | 526.74 | 521.31 | 660,607 | 789,628 | 620,766 |
| 1995 | 36.45 | 520.99 | 525.2 | 516.85 | 613,956 | 739,262 | 501,734 |
| 1996 | n/a | 514.64 | 522.35 | 510.36 | 453,003 | 651,388 | 358,443 |
| 1997 | 35.33 | 521.73 | 527.24 | 518.19 | 633,867 | 806,648 | n/a |
| 1998 | 42.04 | 519.14 | 525.55 | 514.00 | 566,015 | 750,479 | 434,701 |
| 1999 | 21.94 | 512.94 | 516.02 | 508.28 | 413,435 | 481,491 | n/a |
| 2000 | 37.02 | 509.04 | 514.43 | 507.05 | 338,706 | 214,674 | n/a |
| 2001 | 38.37 | 520.16 | 526.73 | 514.47 | 593,645 | 788,954 | 445,394 |
| 2002 | 40.84 | 520.35 | 525.53 | 516.35 | 595,811 | 749,834 | 489,720 |
| 2003 | 29.32 | 520.14 | 522.4 | 516.95 | 589,213 | 652,881 | 504,456 |
| 2004 | 51.2 | 520.87 | 524.83 | 516.81 | 607,209 | 727,214 | 500,993 |
| 2005 | 18.44 | 519.64 | 523.92 | 514.73 | 525,149 | 698,800 | 379,068 |
| 2006 | 28.78 | 513.52 | 515.86 | 511.42 | 354,906 | 405,590 | 313,312 |
| 2007 Flood | 49.92 May 7.83" June 12.30" | 521.94 | 534.02 July | 513.62 Jan | 577,844 | 965,115 | 355,250 |
| 2008 | 30.26 | 520.60 | 524.81 | 517.84 | 536,577 | 655,111 | 455,142 |
| 2009 May 4 | 15.00 to May 4 | 517.96 | 521.81 | 517.39 | 495,302 | 587,971 | 481,358 |