Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
JEFFERSON LINCOLN 13 3 26.34 flushes/yr 54 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
35 m
(114 ft) 		10 m
(33 ft) 		409 ha
(1,011 ac) 		3,314,615 m3
(2,687 ac-ft) 		18 km2
(7.1 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 4.8 5.2 5.5 2
1978 5.5 5.8 6.0 1
1981 4.4 4.4 4.4 1
1982 3.8 4.5 5.0 6
1983 4.5 4.5 4.6 2
1984 5.5 5.5 5.5 1
1985 3.8 4.6 5.5 6
1986 10.6 4.0 4.6 5.2 5 2.5 4.2 7.7
1987 4.3 4.5 4.8 4
1988 4.0 4.5 5.3 6
1989 3.4 4.2 5.0 7
1990 10.0 12 12 3.7 4.7 5.5 7 3.5 4.6 6.7
1991 6.8 6.6 10.7 35 2.8 4.8 5.7 6 2.6 5.4 12.2
1992 10.0 6.6 10.5 11 3.7 4.9 6.2 8 2.8 4.8 8.4
1993 8.4 5.9 8.0 20 4.3 5.3 6.6 7 2.0 3.5 5.0
1994 8.5 6.1 8.5 18 4.3 5.4 7.0 6
1995 7.4 8.2 14 4.1 5.4 6.3 6
1996 7.7 7.1 9.0 14 5.0 5.5 6.5 6
1997 9.2 7.0 10.0 14 4.8 5.7 6.9 6 4.8 5.7 7.3
1998 8.0 6.5 4.4 5.9 7.2 6
1999 8.5 48 6.9 13.0 20 4.1 5.2 6.7 5 6.2 7.1 8.0
2000 8.5 6.7 10.7 19 4.5 5.1 6.0 5 3.2 4.9 7.4
2001 7.2 7.0 13.5 20 5.5 6.3 8.2 5 1.5 3.5 4.5
2002 6.0 6.9 12.0 23 4.4 6.4 9.2 6 1.5 3.3 5.3
2003 8.5 10.0 54 17.0 12 5.4 6.1 6.9 4 1.4 3.6 5.0
2004 11.0 25 4.3 5.4 6.5 6 4.0 4.5 4.7
2005 8.0 6.7 10.0 34 3.9 4.9 5.9 7 3.4 4.7 5.5
2006 7.5 10.3 44 3.9 4.8 6.2 9 2.2 4.3 6.6
2007 10.0 4.5 5.8 6.4 7 3.6 3.6 3.6
2008 5.1 5.9 6.6 5
2009 12.0 43 4.0 4.8 5.7 6 6.9 6.9 6.9
2010 9.0 27 4.5 5.3 5.9 6 3.9 3.9 3.9
2011 9.5 14.0 15 5.1 5.7 7.0 6 5.5 5.5 5.5
2012 3.8 5.0 6.4 7
2013 28.0 9.0 36 6.8 4.5 5.3 6.4 5
2014 14.0 8.0 49 7.0 10.0 18 4.3 5.2 5.9 8 3.8 4.3 5.1
2015 13.0 8.0 51 6.6 12.0 17 5.0 5.3 6.2 4 5.2 5.3 5.5
2016 11.0 9.0 51 6.4 12.0 28 4.1 5.7 6.7 7 3.3 4.1 4.6
2017 13.0 8.0 50 6.5 11.0 24 4.1 5.4 6.2 6 5.0 5.9 6.8
2018 8.0 49 6.8 13.0 28 4.4 5.0 5.4 5 3.0 5.0 7.0

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
15 8.2 48 6.5 11 22 12 2.8 5.2 9.2 5.5 1.4 4.7 12

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 24 8.1 22 7.9 21 8.7 26.6 8.2 26.5 8.0 26 8.3 22.8 8.3 24.4 8.5
1 24 8.1 22 7.9 21 8.7 26.4 8.3 25.8 7.9 26 8.3 22.3 8.3 22.7 8.7
2 24 8.1 22 7.9 21 8.7 26.2 8.2 25.6 7.9 26 8.3 22.1 8.3 22.4 8.7
3 24 8.1 22 7.8 20 8.6 26.0 8.2 25.5 7.8 26 8.2 22.0 8.2 22.1 8.4
4 24 7.8 22 7.8 20 8.6 25.7 7.9 25.4 7.7 26 8.0 21.7 8.1 21.9 8.3
5 24 6.9 22 7.7 20 8.3 25.3 6.9 24.4 3.8 24 7.5 21.6 7.9 21.7 7.9
6 22 4.5 22 7.4 20 7.9 22.6 4.0 20.3 0.5 22 3.6 21.4 7.8 21.3 7.5
7 18 0.2 19 0.1 20 6.7 14.8 0.8 15.8 0.4 17 0.8 17.2 0.8 18.6 1.5
8 14 0.1 14 0.1 17 1.6 12.7 0.5 11.9 0.4 13 0.6 14.2 0.6 14.0 0.6
9 12 0.1 12 0.1 13 0.1 10.8 0.5 10.4 0.4 12 0.5 12.2 0.5 11.1 0.5
10 11 0.1 12 0.1 11 0.1 9.8 0.4 9.9 0.3 10 0.5 10.6 0.5 10.2 0.4
11 11 0.0 11 0.1 11 0.1 9.5 0.4 9.5 0.3 10 0.5 10.0 0.4 9.5 0.4
12 11 0.0 10 0.1 10 0.1 9.1 0.4 9.0 0.3 10 0.4 9.6 0.4 9.4 0.4

Most recent temperature and dissolved oxygen profile plots

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