Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
JEFFERSON LINCOLN 13 1 1.81 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
7 m
(22 ft) 		3 m
(10 ft) 		270 ha
(667 ac) 		7,831,791 m3
(6,349 ac-ft) 		19 km2
(7.5 mi2)

Secchi Disk Transparency Graphs

Graph Legend: Secchi symbols = average Secchi Disk Transparency Values; tick marks = maximum and minimum values for each year.

Water Chemistry and Trophic State Parameters

Table Legend:

Color: Color (SPU), Alk: Alkalinity (mg/l CaCO3), SpCon: Specific Conductivity (\(\mu\)S/cm), pH: pH (standard units)

TP = Total Phosphorus (\(\mu\)g/L) – EC: Epilimnion Core, SG: Surface Grab, BG: Bottom Grab, PG: Profile Grab

SDT = Secchi Disk Transparency (m) – Min: minimum value, Avg: average value, Max: maximum value, n: number of months with Secchi readings per year, b: number of times Secchi disk was observed touching the bottom of the lake per year

Chl = Chlorophyll-a (\(\mu\)g/L) – Min: minimum value, Avg: average value, Max: maximum value
Year Color Alk SpCon pH TP-EC TP-SG TP-BG TP-PG SDT-Min SDT-Avg SDT-Max SDT-n SDT-b Chl-Min Chl-Avg Chl-Max
1975 2.4 3.1 4.4 4
1976 10.0 32 13 3.2 3.6 4.9 6 6.0 6.0 6.0
1977 14 2.7 3.8 4.7 3
1978 2.7 3.9 5.0 4
1979 2.1 3.3 4.0 4
1980 3.7 3.8 4.1 3
1981 6.0 32 15 2.7 3.3 3.7 5 6.4 6.4 6.4
1982 7.0 42 12 2.7 3.4 4.0 3 6.6 6.8 6.9
1983 3.2 3.6 4.1 5
1984 7.0 23 2.5 3.2 4.0 2 12.8 12.8 12.8
1985 2.7 3.4 4.4 4
1986 2.8 3.2 3.6 3
1987 7.0 39 13 4.2 4.4 5.0 2
1988 3.3 3.9 4.9 5
1989 2.7 3.6 4.7 5
1990 3.4 4.0 5.3 5
1991 11.0 34 6.7 2.5 3.7 4.5 5 9.8 9.8 9.8
1992 2.7 3.6 4.3 8
1993 4.1 4.4 4.7 4
1994 8.0 12 2.8 3.9 5.3 7 7.7 7.7 7.7
1995 14 3.8 4.1 4.7 5
1996 17 2.6 3.6 4.2 6
1997 20 3.2 4.1 4.9 6
1998 9.0 42 21 19 2.4 3.5 4.0 7 9.3 9.3 9.3
1999 13 3.4 3.9 5.1 6
2000 16 2.6 3.2 4.0 7
2001 7.0 48 20 13 2.7 3.5 4.1 6 9.6 9.6 9.6
2002 2.7 3.7 4.5 8
2003 20 3.0 3.9 4.9 7
2004 18 2.6 3.7 4.7 6
2005 23 2.8 3.4 4.0 4
2006 30 6.1 46 6.9 31 15 2.6 3.8 4.4 7
2007 9.0 9 9.0 38 22 2.4 3.4 4.1 6
2008 20 2.6 3.7 4.7 8
2009 14 15 21 1.2 3.0 4.2 6 27.0 27.0 27.0
2010 19 2.1 2.9 3.8 5
2011 1.9 2.8 4.0 6
2012 24 7.4 64 6.9 18 1.8 2.6 3.6 6
2013 28 8.0 54 7.0 18 23 24 1.5 3.1 4.2 8 11.0 11.0 11.0
2014 36 8.0 50 6.7 24 33 2.8 2.9 3.0 2 19.0 19.0 19.0
2015 15 8.0 52 6.9 11 24 1.9 3.4 4.2 9 1.5 1.5 1.5
2016 22 8.0 56 7.0 37 2.4 3.7 4.7 10 12.0 12.0 12.0
2017 21 8.5 72 7.0 18 15 3.0 3.5 4.3 9 8.7 8.7 8.7

Lake Chemistry and Trophic Summary Data - Overall Summary Values:

Avg Color Avg Alk Avg SpCon pH Avg TP-EC Avg TP-SG Avg TP-BG Avg TP-PG SDT-Min SDT-Avg SDT-Max SDT-n Chl-Min Chl-Avg Chl-Max
25 7.9 45 6.9 19 18 21 1.2 3.5 5.3 5.5 1.5 10 27

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2016-08-26
2016-09-09
2016-09-23
2017-08-04
2017-08-18
2017-08-30
2017-09-01
2017-09-15
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25 8.0 24 8.4 21 8.3 25 7.8 23 8.6 22 8.4 20 9.1 23 8.7
1 24 8.0 23 8.4 21 8.3 25 7.8 23 8.6 22 8.3 20 9.1 22 8.7
2 24 8.0 23 8.5 21 8.3 25 7.9 23 8.6 22 8.2 20 9.1 21 8.8
3 24 7.8 23 8.4 21 8.3 24 7.2 23 8.6 22 8.2 20 9.1 20 8.2
4 24 6.7 22 6.0 21 8.0 23 5.2 23 8.5 22 7.9 20 9.0 20 7.5
5 23 4.8 22 5.1 21 7.2 22 2.0 23 8.3 22 7.2 20 9.0 20 6.8
6 23 2.7 22 3.2 21 6.8 19 0.6 22 1.5 21 3.9 20 8.8 19 5.7
7 21 0.3 22 0.5 21 5.8 17 0.6 18 0.8 20 7.7 19 4.9

Recent temperature and dissolved oxygen profile plots

Temperature (°C), Dissolved Oxygen (mg/L)