Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
JEFFERSON LINCOLN 13 1 6.46 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
5 m
(16 ft) 		3 m
(9 ft) 		142 ha
(351 ac) 		3,964,243 m3
(3,214 ac-ft) 		27 km2
(10 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
1981 2.0 2.0 2.0 4
1982 7.0 45 13 2.0 2.4 3.6 3 4.7 4.7 4.7
1997 2.7 3.4 3.9 6
1998 9.0 39 14 2.0 2.7 3.4 7 7.6 7.6 7.6
1999 2.5 3.3 4.1 6
2000 2.5 3.0 3.5 6
2002 42 7.5 49 7 3.8 3.8 3.8 1 6.5 8.2 10.0
2003 3.6 4.2 4.8 5
2005 3.2 3.2 3.2 1
2010 12 4.1 4.1 4.1 1 3.4 3.4 3.4
2015 4.0 4.3 4.4 3
2016 3.9 4.2 4.6 5
2017 29 8.0 53 6.8 14 3.0 3.5 4.1 5 5.3 5.3 5.3

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
36 7.9 46 6.8 12 2 3.4 4.8 4.1 3.4 5.8 10

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1982-09-03
1998-08-24
2002-08-29
2010-09-01
2017-08-30
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 20 8.8 23 7.6 23 7.9 28 8.0 22 7.5
1 20 8.8 23 7.5 23 7.8 26 8.3 22 7.5
2 20 8.7 23 7.5 23 7.6 24 8.5 22 7.4
3 20 8.7 23 7.3 23 7.4 24 8.4 22 7.3
4 20 8.5 22 4.2 23 7.3 23 6.0 22 7.3
5 19 7.6 22 6.8

Recent temperature and dissolved oxygen profile plots

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