Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
JEFFERSON LINCOLN 13 1 0.77 flushes/yr 54 ft
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
2018 7.0 51 6.8 9.0 4.5 5.5 6.3 5 4.0 6.0 8.0

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 7.8 49 6.7 9.3 15 9.1 2.5 5.3 8.2 5.5 1.2 4.6 8

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2017-08-24
2017-08-31
2017-09-13
2018-08-02
2018-08-17
2018-08-30
2018-09-12
2018-09-14
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 23.9 8.3 22.2 7.9 20.6 8.8 25.9 8.3 25.6 8.2 25.6 8.5 22.0 8.5 22.3 8.9
1 23.9 8.3 22.0 7.9 20.6 8.8 25.8 8.3 25.6 8.2 25.6 8.5 21.9 8.5 22.2 8.9
2 23.9 8.3 22.0 7.9 20.5 8.8 25.8 8.3 25.6 8.2 25.6 8.4 21.9 8.4 22.1 8.9
3 23.8 8.3 22.0 7.9 20.5 8.8 25.8 8.3 25.6 8.1 25.4 8.3 21.9 8.4 22.1 8.9
4 23.7 8.2 22.0 7.9 20.5 8.8 25.6 8.2 25.5 8.1 25.1 8.2 21.9 8.4 22.0 8.8
5 23.4 8.0 22.0 7.9 20.3 8.6 25.4 8.2 25.5 8.0 24.6 8.0 21.8 8.4 21.9 8.7
6 23.2 7.8 22.0 7.9 20.1 8.6 25.0 7.8 25.3 7.2 24.1 7.8 21.8 8.3 21.9 8.6
7 23.0 7.5 21.9 7.9 20.0 8.5 23.3 6.3 23.9 4.6 23.8 7.6 21.7 8.3 21.8 8.3
8 22.6 7.1 21.8 7.6 19.7 7.9 20.0 3.7 19.9 2.4 22.4 5.3 21.2 7.5 21.7 8.2
9 18.6 1.7 19.2 1.9 19.3 6.8 16.1 3.3 17.6 2.2 18.0 1.3 20.9 7.0 20.1 3.6
10 14.3 2.3 15.0 1.9 18.4 5.2 14.1 3.5 14.5 2.8 14.1 2.0 15.5 1.2 15.1 1.4
11 12.7 3.4 13.0 2.8 13.9 1.8 13.0 4.0 11.7 4.3 11.9 3.2 12.8 2.2 13.1 1.9
12 11.7 4.0 12.3 3.1 11.6 2.7 11.1 5.0 10.4 4.9 10.8 3.7 11.0 2.9 11.1 2.9
13 10.9 4.5 10.9 3.9 10.8 3.6 10.2 5.8 9.2 5.8 10.2 4.0 10.1 3.7 9.8 3.6
14 10.0 4.9 10.3 4.3 10.2 3.7 9.5 6.0 8.6 6.4 9.7 4.5 9.4 4.5 9.2 4.8
15 9.8 5.3 9.9 4.7 9.8 4.1 8.9 6.3 8.4 6.4 9.3 5.0 8.9 4.8 8.7 5.1
16
17 9.3 5.0 9.5 4.9 9.5 4.2 8.2 6.9 8.0 6.5 8.7 5.4 8.4 5.2 8.3 5.3
18
19 9.1 5.1 9.2 5.0 9.2 4.1 7.9 7.0 7.9 6.4 8.3 5.9 8.2 5.2 8.1 5.3
20
21 9.0 4.8 9.1 4.5 9.1 4.0 7.8 6.9 7.8 6.3 8.0 5.8 8.0 5.2 8.0 5.0
22
23 9.0 4.5 9.0 4.1 9.1 3.9 7.7 6.9 7.7 6.2 7.9 5.7 7.9 4.9 7.9 4.9
24
25 9.0 4.2 8.9 3.2 9.0 3.6 7.7 6.8 7.7 5.8 7.9 5.6 7.8 4.5 7.8 4.4
26
27
28
29
30 8.9 2.7 7.6 6.0 7.6 5.1 7.7 5.1 7.7 4.0 7.7 3.3

Most recent temperature and dissolved oxygen profile plots

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