Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
JEFFERSON LINCOLN 13 1 0.77 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
35 m
(114 ft) 		10 m
(33 ft) 		871 ha
(2,152 ac) 		71,692,767 m3
(58,122 ac-ft) 		84 km2
(32 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
1977 8.0 4.0 4.2 4.5 3
1979 8.0 45 10.0 3.8 4.8 5.5 4 3.8 3.8 3.8
1981 4.3 4.8 5.3 2
1982 6.0 46 11.0 6.0 4.7 5.3 5.6 3 5.5 5.5 5.5
1983 3.3 4.5 5.9 4
1984 5.0 10.0 16.0 5.0 5.4 5.5 2 5.6 5.6 5.6
1985 5.3 6.2 7.0 3
1986 4.5 5.1 5.7 2
1987 9.0 38 7.0 10.0 5.0 5.3 5.8 2
1988 3.5 4.6 5.7 7
1989 2.5 3.8 5.0 8
1990 9.5 9.1 2.9 4.4 5.8 7 3.4 4.7 6.9
1991 5.2 6.8 9.5 21.0 4.0 5.2 6.9 6 2.8 4.0 5.5
1992 9.8 6.4 10.2 9.0 3.9 5.2 6.0 7 3.4 4.6 5.4
1993 8.1 6.5 13.8 13.6 2.8 5.2 6.3 6 3.1 4.3 6.3
1994 8.3 6.4 8.0 20.0 4.8 5.4 6.6 6
1995 7.2 7.3 14.0 3.7 5.1 6.3 6
1996 6.5 7.1 9.2 9.9 4.3 5.6 6.5 6
1997 9.0 7.0 8.3 15.7 4.8 5.3 6.3 6 5.0 5.8 7.2
1998 8.3 7.0 4.0 5.3 6.5 6
1999 7.4 47 6.9 9.0 4.6 5.4 6.2 5 5.1 5.3 5.5
2000 8.4 6.8 9.7 3.9 5.4 6.3 6 3.3 4.5 5.7
2001 7.0 6.9 8.0 23.0 6.4 7.0 8.2 5 1.2 3.9 5.6
2002 6.0 7.0 10.7 3.7 5.9 7.6 6 2.4 3.2 4.6
2003 8 8.5 51 6.9 12.0 5.8 6.0 6.2 3 3.9 4.2 4.5
2004 8.7 6.8 11.7 3.7 4.6 5.8 7 5.1 6.3 7.9
2005 8.0 46 6.7 8.7 3.8 5.2 6.2 7 2.9 3.4 4.2
2006 8.0 9.7 25.0 2.8 4.6 5.7 9 3.1 5.5 7.0
2007 8.0 6.6 8.0 3.1 5.2 7.0 7 3.5 3.5 3.5
2008 8.0 4.8 5.7 6.8 5
2009 7.0 6.7 10.0 3.2 4.7 5.2 6 6.8 6.8 6.8
2010 10.0 7.5 4.9 5.7 7.2 5 4.5 4.5 4.6
2011 10.0 73 9.0 5.5 6.0 6.7 6 4.8 4.8 4.8
2012 4.6 5.1 5.8 6
2013 14 8.0 38 6.6 4.5 5.2 6.4 5
2014 21 8.0 50 7.1 9.5 4.2 5.2 6.0 8 2.9 3.9 4.4
2015 12 8.5 50 6.9 9.0 10.0 5.4 5.9 6.5 7 2.5 4.0 5.0
2016 11 8.0 51 6.5 9.0 5.4 6.2 7.0 8 3.2 3.4 3.6
2017 14 8.0 53 6.5 8.5 4.3 6.0 6.8 6 3.1 4.1 5.1

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
13 7.9 49 6.7 9.3 15 9.1 2.5 5.3 8.2 5.5 1.2 4.6 7.9

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2016-08-12
2016-08-24
2016-09-01
2017-08-09
2017-08-24
2017-08-31
2017-09-13
2017-09-25
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25.9 7.7 24.3 7.7 23.8 7.8 23.8 7.8 23.9 8.3 22.2 7.9 20.6 8.8 21.6 8.9
1 25.1 7.8 24.1 7.8 23.8 7.9 23.8 7.8 23.9 8.3 22.0 7.9 20.6 8.8 21.2 9.0
2 25.0 7.8 24.0 7.8 23.8 7.8 23.7 7.8 23.9 8.3 22.0 7.9 20.5 8.8 21.1 8.9
3 24.9 7.8 24.0 7.7 23.8 7.9 23.6 7.8 23.8 8.3 22.0 7.9 20.5 8.8 20.6 8.8
4 24.8 7.7 24.0 7.7 23.8 7.8 23.6 7.8 23.7 8.2 22.0 7.9 20.5 8.8 20.5 8.8
5 24.8 7.7 24.0 7.7 23.8 7.8 23.5 7.8 23.4 8.0 22.0 7.9 20.3 8.6 20.4 8.5
6 24.4 7.5 24.0 7.7 23.7 7.8 23.5 7.8 23.2 7.8 22.0 7.9 20.1 8.6 20.3 8.3
7 24.2 7.3 24.0 7.7 23.7 7.7 23.5 7.8 23.0 7.5 21.9 7.9 20.0 8.5 20.2 8.1
8 22.5 4.4 23.5 7.3 23.6 7.5 20.4 3.3 22.6 7.1 21.8 7.6 19.7 7.9 20.0 7.8
9 17.7 2.8 20.2 2.4 22.0 4.1 17.9 2.4 18.6 1.7 19.2 1.9 19.3 6.8 19.6 6.5
10 14.4 3.4 15.7 2.3 16.0 1.8 14.0 3.6 14.3 2.3 15.0 1.9 18.4 5.2 18.1 4.5
11 12.2 4.4 12.8 3.3 12.9 2.9 12.9 3.8 12.7 3.4 13.0 2.8 13.9 1.8 16.2 1.9
12 11.2 4.9 11.4 3.9 11.7 3.5 12.4 4.3 11.7 4.0 12.3 3.1 11.6 2.7 13.0 1.2
13 10.7 5.2 10.9 4.5 11.0 4.0 11.0 5.0 10.9 4.5 10.9 3.9 10.8 3.6 10.2 3.1
14 10.4 5.1 10.5 4.3 10.5 4.1 10.4 5.3 10.0 4.9 10.3 4.3 10.2 3.7 9.8 3.6
15 10.2 5.3 10.2 4.7 10.1 4.3 9.7 5.7 9.8 5.3 9.9 4.7 9.8 4.1 9.7 3.6
16
17 9.9 5.5 9.9 4.7 9.8 4.3 9.4 5.8 9.3 5.0 9.5 4.9 9.5 4.2 9.5 3.8
18
19 9.7 5.5 9.7 4.7 9.6 4.1 9.2 5.9 9.1 5.1 9.2 5.0 9.2 4.1 9.3 3.4
20
21 9.6 5.4 9.5 4.3 9.5 4.0 9.1 5.8 9.0 4.8 9.1 4.5 9.1 4.0 9.2 3.3
22
23 9.6 5.3 9.5 4.1 9.5 3.6 9.0 5.6 9.0 4.5 9.0 4.1 9.1 3.9 9.1 3.1
24
25 9.5 5.1 9.4 3.9 9.5 3.6 8.9 5.3 9.0 4.2 8.9 3.2 9.0 3.6 9.0 2.3
26
27 9.4 3.4
28
29 9.4 3.3
30 9.4 4.2 9.4 3.3 9.4 3.2 8.9 4.5 8.9 2.7 8.9 1.8

Recent temperature and dissolved oxygen profile plots

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