Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
LINCOLN PENOBSCOT 34 1 0.42 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
20 m
(66 ft) 		10 m
(33 ft) 		186 ha
(459 ac) 		17,243,452 m3
(13,979 ac-ft) 		7 km2
(2.6 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 8.2 8.6 9.3 2
1974 8.8 8.9 9.1 3
1975 10.2 10.4 10.5 3
1976 9.1 10.4 11.9 2
1981 6.5 41 6.0 12 5.5 7.3 10.2 4 1.2 1.2 1.2
1984 5.5 8.0 7.0 8.6 8.6 8.6 1 1.7 1.7 1.7
1991 17.0 29 7.4 4.0 8.8 8.8 8.8 1
1995 9.5 3.0 10.2 10.2 10.2 1
1996 5.3 34 6.9 6.5 9.5 7.7 8.6 9.7 5 0.7 1.3 2.5
1997 12.2 36 6.2 5.7 8.0 6.9 8.2 9.4 6 1.3 1.9 2.3
1998 5.8 39 6.4 7.6 46.7 5.7 8.3 9.9 5 0.3 1.2 2.8
1999 6.3 34 6.6 4.0 8.0 7.3 8.6 9.6 4 0.9 1.6 2.3
2000 6.1 6.3 6.4 2
2001 6.0 34 7.3 7.0 5.8 6.9 10.9 4 1.3 1.3 1.3
2002 2.0 40 6.3 6.5 8 11.2 5.7 6.9 8.5 3 1.2 1.5 1.8
2003 2.8 42 6.2 4.7 7.7 7.5 7.6 7.8 3 1.2 1.4 1.7
2004 1.0 40 6.3 3.0 5.0 4.7 5.6 7.1 3 1.0 1.0 1.0
2009 5.0 8.4 8.4 8.4 1 2.0 2.0 2.0
2016 3 8.0 34 7.2 4.5 8.2 9.0 10.2 6 1.1 1.1 1.1
2017 9.6 11.5 12.5 4

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
3 6.8 37 6.5 5.4 8 13 12 4.7 8.5 12 3.1 0.3 1.4 2.8

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1999-08-17
1999-09-24
2001-08-15
2002-08-27
2003-08-13
2003-09-25
2009-08-24
2016-08-09
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 23.0 8.7 19.0 8.2 25.0 8.2 23.7 8.2 24.9 8.2 20.0 8.9 25.5 8.6 23.7 8.5
1 22.9 8.7 19.0 8.2 24.9 8.2 23.7 8.2 24.8 8.3 20.0 8.9 25.4 8.5 23.6 8.5
2 22.8 8.7 18.8 8.3 24.5 8.2 23.7 8.2 24.7 8.3 20.0 8.9 25.2 8.4 23.6 8.5
3 22.6 8.7 18.5 8.4 24.0 8.2 23.5 8.3 24.5 8.3 20.0 8.9 25.0 8.2 23.6 8.5
4 22.4 8.7 18.5 8.5 24.0 8.1 23.4 8.3 23.7 8.5 20.0 8.9 24.8 8.2 23.6 8.5
5 22.4 8.7 18.5 8.6 24.0 8.1 23.2 8.3 23.0 8.5 19.8 8.9 24.1 8.4 23.4 8.5
6 22.2 8.7 18.5 8.7 24.0 8.1 23.0 8.3 21.0 8.9 19.8 8.9 21.6 8.6 23.4 8.4
7 21.9 8.7 18.4 8.7 18.5 11.2 22.2 8.7 17.6 10.6 19.7 9.0 18.4 8.3 19.1 10.4
8 19.9 9.9 18.3 8.7 14.5 12.0 18.2 9.9 13.5 10.8 18.2 9.4 16.2 8.3 16.1 10.8
9 14.0 11.6 18.2 8.7 11.5 11.8 15.1 10.1 11.0 10.9 14.8 11.0 13.8 7.6 13.2 10.4
10 12.5 10.6 12.6 10.2 10.0 11.4 14.0 10.2 9.9 10.6 11.0 10.0 11.9 7.1 11.5 9.5
11 11.3 10.6 10.5 10.0 8.5 10.5 12.0 9.3 8.6 10.2 9.3 9.3 10.6 6.6 10.7 8.7
12 10.8 8.6 9.5 7.9 7.5 10.0 11.0 7.7 7.9 9.8 9.0 7.5 9.8 6.3 10.0 8.2
13 10.0 7.9 8.4 5.8 7.0 9.0 10.5 6.1 7.4 7.6 8.4 6.8 9.2 6.0 9.4 7.6
14 9.9 6.8 8.0 5.3 6.2 7.2 10.0 5.9 7.1 6.8 8.0 5.2 9.0 5.4 9.6 7.1
15 9.7 6.2 7.9 4.4 6.0 6.5 9.8 4.4 7.0 6.4 7.7 4.8 8.8 5.0 8.6 6.2
16 9.2 4.9 7.7 3.4 6.0 5.7 9.8 2.6 7.0 6.0 7.4 4.2
17 9.0 4.1 7.4 2.6 6.0 5.3 9.1 2.2 6.9 4.4 7.1 4.2 8.4 3.2 8.3 4.7
18 7.3 1.2 6.8 4.0 7.0 4.0 8.2 4.2
19 6.8 3.6

Recent temperature and dissolved oxygen profile plots

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