Nav Project water level history
Daily records since 1989 · Level today: 368.46 ft
Highest on record
393.87 ft
Aug 6, 1993
Lowest on record
362.48 ft
Jan 6, 2004
Today
368.46 ft
Oct 21, 2026
Years of data
37
since 1989
In short
Across 31 complete years, 2022 had the lowest average level (368.05 ft) and 1993 the highest (374.98 ft).
On average the lake is lowest in February (367.97 ft) and highest in May (372.60 ft).
Nav Project level, all years
Loading chart…
Measured
Normal range for the date (middle 50% of past years)
Full pool
Lowest years
Years ranked by their lowest daily level.
- 2004
- 2015
- 2006
- 2019
- 2022
Yearly highs and lows
| Year | Average | Low | Low date | High | High date |
|---|---|---|---|---|---|
| 2026 (294 days) | 368.80 | 365.47 | Mar 13 | 376.78 | May 2 |
| 2025 | 368.38 | 365.00 | Apr 15 | 375.81 | Apr 9 |
| 2024 | 369.21 | 362.88 | Nov 5 | 379.57 | Jul 11 |
| 2023 | 368.15 | 363.74 | Apr 3 | 370.10 | Mar 29 |
| 2022 | 368.05 | 362.54 | Mar 14 | 377.55 | May 8 |
| 2021 | 368.71 | 364.25 | Feb 2 | 378.85 | Mar 21 |
| 2020 | 369.92 | 364.12 | Feb 18 | 378.99 | Jan 14 |
| 2019 | 374.83 | 362.52 | Jan 28 | 391.89 | Jun 10 |
| 2018 | 368.92 | 363.46 | Apr 18 | 378.60 | Oct 17 |
| 2017 | 369.85 | 366.02 | Jan 21 | 390.34 | May 6 |
| 2016 | 368.99 | 364.01 | Aug 19 | 391.74 | Jan 1 |
| 2015 | 370.47 | 362.50 | Mar 16 | 390.76 | Dec 31 |
| 2014 | 368.84 | 363.18 | Apr 12 | 377.18 | Jul 12 |
| 2013 | 370.50 | 363.17 | Jan 31 | 388.21 | Jun 5 |
| 2012 | 368.37 | 367.42 | Feb 9 | 368.51 | Aug 20 |
| 2011 | 371.43 | 366.71 | Mar 23 | 385.15 | Apr 30 |
| 2010 | 371.59 | 364.26 | Jan 3 | 381.44 | May 21 |
| 2009 | 370.11 | 364.66 | Feb 18 | 380.92 | Nov 3 |
| 2008 | 371.66 | 366.14 | Dec 29 | 384.81 | Jul 1 |
| 2007 | 368.53 | 362.56 | Jan 16 | 375.46 | May 13 |
| 2006 | 368.33 | 362.50 | Mar 13 | 368.50 | Dec 23 |
| 2005 | 368.20 | 364.15 | Feb 13 | 376.39 | Jan 7 |
| 2004 | 368.40 | 362.48 | Jan 6 | 374.93 | May 30 |
| 2003 (309 days) | 368.31 | 364.54 | Jun 13 | 371.97 | May 13 |
| 2002 (321 days) | 368.93 | 363.65 | Mar 27 | 386.33 | May 18 |
| 2001 (294 days) | 369.74 | 365.00 | Feb 17 | 380.89 | Jun 11 |
| 2000 | 368.36 | 365.61 | Jul 21 | 373.70 | Jun 30 |
| 1999 | 369.56 | 364.93 | Jan 30 | 379.74 | May 9 |
| 1998 | 370.04 | 366.10 | Aug 7 | 380.85 | Apr 18 |
| 1997 | 369.24 | 365.99 | Jan 29 | 380.14 | Mar 2 |
| 1996 | 369.31 | 366.03 | Apr 23 | 381.69 | Jun 3 |
| 1995 (310 days) | 370.45 | 365.42 | Mar 12 | 389.53 | May 23 |
| 1994 (305 days) | 368.83 | 365.62 | Jan 2 | 384.22 | Apr 16 |
| 1993 | 374.98 | 365.08 | Dec 1 | 393.87 | Aug 6 |
| 1992 | 368.67 | 367.72 | Nov 16 | 376.43 | Dec 19 |
| 1991 | 368.64 | 368.11 | Oct 24 | 373.24 | May 9 |
| 1990 | 369.20 | 366.43 | Jan 4 | 381.62 | May 20 |
| 1989 (1 days) | 368.44 | 368.44 | Dec 31 | 368.44 | Dec 31 |
Levels in feet. Partial years show the number of days with data.
Monthly averages
| Month | Average | Lowest | Highest |
|---|---|---|---|
| January | 368.30 | 362.48 | 391.74 |
| February | 367.97 | 362.57 | 379.18 |
| March | 368.99 | 362.50 | 382.90 |
| April | 370.56 | 363.18 | 385.15 |
| May | 372.60 | 363.21 | 390.34 |
| June | 372.00 | 364.54 | 391.89 |
| July | 370.62 | 362.55 | 391.96 |
| August | 368.94 | 362.61 | 393.87 |
| September | 368.81 | 367.39 | 385.85 |
| October | 368.86 | 367.35 | 385.72 |
| November | 368.57 | 362.88 | 380.92 |
| December | 368.48 | 364.74 | 390.76 |
Download
Daily levels as CSV (13,143 rows; credit the original agencies listed below)