Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
LINCOLN PENOBSCOT 34 2 0.81 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
20 m
(66 ft) 		10 m
(33 ft) 		72 ha
(178 ac) 		3,608,375 m3
(2,925 ac-ft) 		3 km2
(1.2 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
1973 5.0 5.8 6.6 2
1974 5.2 6.5 7.3 3
1975 7.8 8.1 8.2 3
1976 6.7 7.2 7.3 2
1981 6.5 40 5.0 5.7 6.4 4 2.4 2.4 2.4
1982 4.3 5.5 6.5 6
1983 4.7 5.7 6.9 5
1984 5.6 5.6 5.6 1
1985 5.7 6.7 7.4 4
1995 8.0 6.0 7.5 7.5 7.5 1
1996 3.7 30 6.3 7.0 9 5.2 6.4 7.2 5 1.6 2.2 5.6
1997 12.0 32 6.3 6.2 28 5.6 6.4 7.2 6 2.0 2.5 3.4
1998 27.2 39 6.4 8.2 16 4.3 6.3 7.1 6 0.9 1.8 2.8
1999 6.3 31 6.6 5.8 14 4.8 6.2 7.2 4 1.0 2.0 3.1
2002 2.5 40 6.2 8.0 5 18 6.0 6.3 6.7 2 2.2 2.6 3.1
2003 3.0 38 6.1 5.5 11 6.2 6.3 6.4 2 1.2 1.6 2.0
2004 1.0 35 6.0 4.0 8 5.8 5.8 5.8 1 1.5 1.5 1.5
2009 4 6.4 6.4 6.6 3
2010 5 5.8 6.5 7.5 8
2011 12 5.8 29 6.9 2 5.2 6.2 7.0 7
2012 3 5.3 6.3 7.0 5
2013 5 5.3 6.1 6.9 6
2014 3 5.0 6.0 6.7 5
2015 8 5.8 6.4 7.2 6
2016 9 7.0 32 7.0 5.0 5.4 6.4 7.2 8 2.0 2.0 2.0
2017 5.2 6.5 7.4 6

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
10 7.5 35 6.3 6.2 4.6 13 4.3 6.3 8.2 4.3 0.9 2.1 5.6

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1998-08-26
1998-09-24
1998-09-30
1999-08-17
1999-09-24
2002-08-27
2003-08-13
2016-08-09
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 23.0 8.4 17 8.8 23 8.2 23 8.5 19 7.9 24 8.0 25.5 8.2 24 8.4
1 22.8 8.4 17 8.3 23 8.2 23 8.5 19 7.9 24 8.0 25.2 8.2 24 8.4
2 22.7 8.4 17 8.3 22 8.2 23 8.5 19 7.9 24 8.0 24.9 8.2 23 8.3
3 22.5 8.4 17 8.2 22 8.2 22 8.5 18 8.0 24 8.0 24.6 8.3 23 8.3
4 22.2 8.4 17 8.3 22 8.2 22 8.5 18 8.2 23 8.0 23.4 8.3 23 8.3
5 21.2 8.3 17 8.3 21 8.5 22 8.5 18 8.2 23 8.1 20.5 9.1 23 8.0
6 18.1 8.6 17 8.3 15 9.5 21 8.0 18 8.3 22 8.1 15.8 10.4 18 6.8
7 13.2 3.4 17 8.3 13 6.2 18 6.1 18 8.3 17 4.6 11.8 5.9 14 4.5
8 11.9 0.5 13 0.8 11 3.2 14 2.2 18 8.2 16 4.8 10.0 3.7 13 2.8
9 11.0 0.3 11 0.4 10 2.4 13 0.6 12 0.4 14 0.3 9.0 2.1 12 1.0
10 9.8 0.2 10 0.3 12 0.5 11 0.2 13 0.1 8.8 1.3 11 0.7
11 9.7 0.2 11 0.1 13 0.1 8.5 1.0
12 8.4 0.8

Recent temperature and dissolved oxygen profile plots

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