Arrowrock Reservoir water level history
Daily records since 1990 · Level today: 3,132.65 ft
Highest on record
3,217.16 ft
Jul 11, 1995
Lowest on record
1,513.18 ft
Sep 6, 2003
Today
3,132.65 ft
Oct 21, 2026
Years of data
37
since 1990
In short
Across 36 complete years, 2003 had the lowest average level (3,000.74 ft) and 2017 the highest (3,183.74 ft).
On average the lake is lowest in September (3,092.80 ft) and highest in June (3,190.33 ft).
Arrowrock Reservoir level, all years
Loading chart…
Measured
Normal range for the date (middle 50% of past years)
Lowest years
Years ranked by their lowest daily level.
- 2003
- 1991
- 1992
- 2004
- 1994
Yearly highs and lows
| Year | Average | Low | Low date | High | High date |
|---|---|---|---|---|---|
| 2026 (287 days) | 3,176.82 | 3,110.61 | Aug 14 | 3,215.06 | Apr 18 |
| 2025 | 3,161.85 | 3,110.43 | Aug 20 | 3,209.55 | Jun 14 |
| 2024 | 3,172.41 | 3,088.31 | Oct 22 | 3,213.77 | Jun 12 |
| 2023 | 3,167.84 | 3,115.34 | Aug 22 | 3,211.38 | Jun 16 |
| 2022 | 3,166.42 | 3,107.53 | Aug 16 | 3,214.22 | Jun 14 |
| 2021 | 3,157.12 | 3,098.42 | Jul 26 | 3,207.31 | Mar 21 |
| 2020 | 3,174.21 | 3,119.73 | Sep 1 | 3,206.71 | Mar 4 |
| 2019 | 3,166.33 | 3,103.74 | Sep 18 | 3,211.44 | Jun 18 |
| 2018 | 3,174.89 | 3,109.08 | Sep 2 | 3,214.21 | May 28 |
| 2017 | 3,183.74 | 3,131.84 | Sep 6 | 3,214.61 | Jun 9 |
| 2016 | 3,171.00 | 3,110.94 | Aug 16 | 3,213.64 | May 23 |
| 2015 | 3,171.06 | 3,111.18 | Sep 2 | 3,214.23 | Apr 6 |
| 2014 | 3,175.02 | 3,110.78 | Aug 21 | 3,213.38 | May 31 |
| 2013 | 3,162.46 | 3,111.07 | Aug 19 | 3,203.58 | Mar 6 |
| 2012 | 3,178.55 | 3,110.58 | Sep 4 | 3,214.88 | Jun 7 |
| 2011 | 3,179.24 | 3,132.33 | Sep 7 | 3,210.69 | Jul 8 |
| 2010 | 3,179.09 | 3,140.10 | Nov 6 | 3,213.39 | Jun 12 |
| 2009 | 3,178.21 | 3,105.57 | Sep 9 | 3,211.41 | Apr 24 |
| 2008 | 3,176.85 | 3,107.31 | Sep 2 | 3,216.10 | Jun 26 |
| 2007 | 3,167.69 | 3,100.38 | Sep 4 | 3,211.10 | Apr 2 |
| 2006 | 3,168.81 | 3,094.64 | Sep 4 | 3,216.15 | Jun 25 |
| 2005 | 3,147.65 | 3,096.18 | Aug 23 | 3,191.51 | Jun 10 |
| 2004 | 3,122.29 | 3,022.65 | Jan 12 | 3,198.23 | Jun 18 |
| 2003 | 3,000.74 | 1,513.18 | Sep 6 | 3,215.86 | Jun 12 |
| 2002 | 3,158.28 | 3,089.64 | Aug 4 | 3,213.29 | May 5 |
| 2001 | 3,151.91 | 3,091.49 | Aug 6 | 3,192.76 | Apr 26 |
| 2000 | 3,162.14 | 3,088.80 | Sep 5 | 3,216.92 | Jun 16 |
| 1999 | 3,157.32 | 3,088.83 | Sep 4 | 3,215.62 | Jul 2 |
| 1998 | 3,177.45 | 3,081.62 | Sep 8 | 3,216.92 | Jun 27 |
| 1997 | 3,153.64 | 3,092.88 | Sep 23 | 3,215.19 | Jan 3 |
| 1996 | 3,169.31 | 3,093.39 | Sep 4 | 3,216.89 | Jul 7 |
| 1995 | 3,172.59 | 3,090.19 | Sep 30 | 3,217.16 | Jul 11 |
| 1994 | 3,121.48 | 3,039.13 | Aug 25 | 3,198.83 | Feb 3 |
| 1993 | 3,170.24 | 3,087.10 | Sep 8 | 3,216.28 | Jun 23 |
| 1992 | 3,105.85 | 3,020.48 | Jul 20 | 3,171.54 | Mar 17 |
| 1991 | 3,109.98 | 3,019.00 | Sep 27 | 3,200.87 | Mar 11 |
| 1990 | 3,130.79 | 3,076.46 | Aug 13 | 3,177.40 | Apr 6 |
Levels in feet. Partial years show the number of days with data.
Monthly averages
| Month | Average | Lowest | Highest |
|---|---|---|---|
| January | 3,173.63 | 3,022.65 | 3,215.19 |
| February | 3,185.00 | 3,023.48 | 3,212.02 |
| March | 3,185.56 | 3,026.09 | 3,213.47 |
| April | 3,186.38 | 3,090.55 | 3,215.06 |
| May | 3,183.21 | 3,057.94 | 3,216.69 |
| June | 3,190.33 | 3,055.11 | 3,216.92 |
| July | 3,168.34 | 3,020.48 | 3,217.16 |
| August | 3,104.34 | 1,520.19 | 3,201.94 |
| September | 3,092.80 | 1,513.18 | 3,190.41 |
| October | 3,120.80 | 3,020.00 | 3,178.05 |
| November | 3,139.42 | 3,022.71 | 3,200.82 |
| December | 3,157.92 | 3,024.85 | 3,208.86 |
Download
Daily levels as CSV (13,426 rows; credit the original agencies listed below)