Long Lake Dam water level history

Daily records since 1990 · Level today: 1,535.47 ft

Highest on record

1,558.00 ft

Jan 5, 2005

Lowest on record

1,518.67 ft

Mar 12, 1991

Today

1,535.47 ft

Oct 21, 2026

Years of data

since 1990

In short

Across 35 complete years, 2001 had the lowest average level (1,532.01 ft) and 2015 the highest (1,535.54 ft).

On average the lake is lowest in February (1,529.85 ft) and highest in September (1,535.49 ft).

Long Lake Dam 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.

19911,518.67 ft on Mar 12
19941,521.73 ft on Mar 8
20191,522.06 ft on Jan 30
20121,522.10 ft on Feb 28
20251,522.12 ft on Feb 22

Yearly highs and lows

Year	Average	Low	Low date	High	High date
2026 (288 days)	1,535.46	1,534.05	Feb 24	1,535.87	May 27
2025	1,533.84	1,522.12	Feb 22	1,535.85	Jun 9
2024	1,535.22	1,530.10	Jan 19	1,535.87	Jun 12
2023	1,533.40	1,522.19	Mar 11	1,535.79	Sep 7
2022	1,533.52	1,522.14	Mar 1	1,535.88	Jul 12
2021	1,533.61	1,522.29	Mar 20	1,535.81	Jul 19
2020	1,534.02	1,523.85	Mar 31	1,535.77	Jun 11
2019	1,532.50	1,522.06	Jan 30	1,535.80	Jun 3
2018	1,535.22	1,532.02	Feb 7	1,535.83	Jul 2
2017	1,533.57	1,522.25	Jan 17	1,535.92	Dec 8
2016	1,532.98	1,522.84	Feb 19	1,535.79	May 27
2015	1,535.54	1,534.87	Feb 12	1,535.88	May 17
2014	1,533.49	1,522.60	Jan 30	1,535.89	Dec 27
2013	1,534.23	1,522.76	Mar 6	1,535.81	Jun 10
2012	1,533.00	1,522.10	Feb 28	1,535.80	Jul 5
2011	1,535.01	1,530.46	Jan 21	1,535.78	Jul 17
2010	1,533.42	1,522.84	Mar 6	1,535.82	May 29
2009	1,533.92	1,524.77	Feb 26	1,535.91	Jun 13
2008	1,532.66	1,522.12	Feb 22	1,535.80	Jul 6
2007	1,534.63	1,522.59	Feb 16	1,535.80	Nov 5
2006 (317 days)	1,535.10	1,530.00	Jan 15	1,535.79	Nov 26
2005	1,534.76	1,527.00	Mar 8	1,558.00	Jan 5
2004	1,533.33	1,522.23	Jan 30	1,536.00	Oct 30
2003	1,535.09	1,524.16	Nov 20	1,535.88	Nov 16
2002	1,535.07	1,530.25	Feb 22	1,535.82	Aug 1
2001	1,532.01	1,522.55	Apr 21	1,535.82	Jul 29
2000	1,534.55	1,524.46	Feb 10	1,536.66	Sep 10
1999	1,535.31	1,533.06	Oct 15	1,535.84	Feb 8
1998	1,534.21	1,522.16	Jan 15	1,535.84	Dec 12
1997	1,534.98	1,524.25	Nov 27	1,535.78	Jul 3
1996	1,535.20	1,523.46	Oct 21	1,535.88	Jun 30
1995	1,535.41	1,532.25	Sep 21	1,536.10	Mar 1
1994	1,533.34	1,521.73	Mar 8	1,535.90	Sep 4
1993	1,533.24	1,522.37	Mar 6	1,535.85	Jun 10
1992	1,535.04	1,527.40	Jan 28	1,535.92	May 29
1991	1,534.79	1,518.67	Mar 12	1,536.00	Aug 7
1990	1,535.31	1,531.01	Dec 16	1,535.99	May 25

Levels in feet. Partial years show the number of days with data.

Monthly averages

Month	Average	Lowest	Highest
January	1,531.96	1,522.06	1,558.00
February	1,529.85	1,522.10	1,535.86
March	1,531.17	1,518.67	1,536.10
April	1,534.37	1,522.55	1,535.88
May	1,535.22	1,525.32	1,535.99
June	1,535.42	1,533.00	1,535.95
July	1,535.47	1,534.44	1,535.96
August	1,535.49	1,534.31	1,536.00
September	1,535.49	1,532.25	1,536.66
October	1,535.37	1,523.46	1,536.00
November	1,535.31	1,524.16	1,535.94
December	1,535.16	1,531.01	1,535.92

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Daily levels as CSV (13,252 rows; credit the original agencies listed below)