| Year | Max Depth (inches) | Date |
|---|---|---|
| 2024 | 2.0 | January 16 |
| 2023 | none | – |
| 2022 | 5.0 | January 17 |
| 2021 | 3.0 | January 31 |
| 2020 | 2.0 | December 25 |
| 2019 | 3.0 | January 13 |
| 2018 | 15.0 | December 10 |
| 2017 | 2.0 | January 7 |
| 2016 | 13.0 | January 23 |
| 2015 | 12.0 | February 22 |
| 2014 | 12.0 | February 14 |
| 2013 | 5.0 | March 25 |
| 2012 | 8.0 | February 20 |
| 2011 | 1.0 | January 28 |
| 2010 | 9.0 | February 6 |
| 2009 | 17.0 | December 19 |
| 2008 | 5.0 | January 18 |
| 2007 | 6.0 | February 7 |
| 2006 | 5.0 | February 12 |
| 2005 | 5.0 | February 28 |
| 2004 | 2.0 | January 9 |
| 2003 | 4.0 | December 5 |
| 2002 | 3.0 | December 5 |
| 2001 | none | – |
| 2000 | 1.0 | January 18 |
| 1999 | 6.0 | March 15 |
| 1998 | 3.0 | December 31 |
| 1997 | none | – |
| 1996 | none | – |
| 1995 | none | – |
| 1994 | none | – |
| 1993 | none | – |
| 1992 | none | – |
| 1991 | none | – |
| 1990 | none | – |
| 1989 | none | – |
| 1988 | none | – |
| 1987 | 1.0 | November 11 |
| 1986 | 1.0 | January 20 |
| 1985 | 2.0 | January 17 |
| 1984 | none | – |
| 1983 | 10.0 | February 11 |
| 1982 | 9.0 | February 27 |
| 1981 | 1.0 | March 23 |
| 1980 | 10.0 | March 2 |
| 1979 | 7.0 | February 12 |
| 1978 | 7.0 | January 20 |
| 1977 | 3.0 | January 5 |
| 1976 | 2.0 | March 9 |
| 1975 | 3.0 | February 4 |
| 1974 | 8.0 | December 1 |
| 1973 | 5.0 | December 17 |
| 1972 | 1.0 | February 17 |
| 1971 | 9.0 | January 1 |
| 1970 | 3.0 | February 14 |
| 1969 | 8.0 | December 26 |
| 1968 | 9.0 | January 13 |
| 1967 | 9.0 | December 28 |
| 1966 | 22.0 | January 30 |
| 1965 | 4.0 | January 30 |
| 1964 | 6.0 | January 13 |
| 1963 | 3.0 | February 26 |
| 1962 | 6.0 | March 6 |
| 1961 | 5.0 | February 8 |
| 1960 | 4.0 | December 12 |
| Years | Station | Coordinates |
|---|---|---|
| 1960–2024 | Covington Filtration Plant | location |