Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
BRIDGTON CUMBERLAND 4 1 0.91 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
15 m
(50 ft) 		6 m
(19 ft) 		524 ha
(1,294 ac) 		30,718,080 m3
(24,904 ac-ft) 		21 km2
(8 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
1938
1955
1972 4.9 5.2 5.8 3
1975 6.5 6.5 6.5 1
1976 8.0 4.4 6.2 7.6 4 2.0 3.8 6.4
1977 7.0 32 5.0 10.8 5.0 6.0 7.5 5 2.8 2.8 2.8
1978 12.2 44 4.5 5.4 7.0 5
1979 5.5 6.8 7.5 6
1980 9.5 1.5 5.4 7.0 5 1.7 3.0 4.5
1981 5.0 6.3 7.5 3
1982 9.0 6.1 7.2 8.3 6 2.3 2.3 2.3
1983 5.0 4.0 11 5.2 7.1 8.2 6 1.9 1.9 1.9
1984 5.8 6.8 7.8 5
1985 6.9 8.5 9.2 5
1986 6.5 26 16.0 14 6.3 7.1 8.5 6
1987 5.4 7.2 8.5 7
1988 12.2 11.4 18 5.3 6.1 7.5 7 2.1 2.8 3.4
1989 11.0 8.0 5.0 6.1 7.8 5 1.9 2.4 3.4
1990 7.0 6.6 7.7 5.2 6.0 7.2 5
1991 7.0 7.8 4.8 6.3 7.4 7 1.7 2.3 3.1
1992 5.7 7.8 5.2 6.9 8.0 7
1993 8.5 6.9 5.3 7.6 5.8 7.2 8.7 5 2.1 2.2 2.3
1994 8.1 5.9 6.6 7.8 6
1995 8.0 6.8 8.4 6.2 7.4 8.0 6
1996 9.2 6.7 4.0 7.4 5.3 6.3 8.0 5 2.7 3.2 3.8
1997 8.8 5.8 6.5 7.3 8 2.4 3.3 4.2
1998 6.6 6.2 7.2 7.5 5.1 6.3 7.3 8 2.6 3.2 4.1
1999 5.3 38 6.2 6.0 12 8.0 4.8 6.6 8.6 9 1.8 3.3 6.8
2000 13.7 5.3 37 6.3 7.7 22.0 5.0 6.0 7.3 8 2.3 5.3 10.3
2001 13.1 7.4 40 6.8 6.8 13.2 5.9 6.9 7.8 5 1.4 2.4 3.3
2002 11.5 7.8 45 6.8 7.7 11 10.1 5.3 6.5 7.8 7 2.0 4.0 7.5
2003 15.7 7.6 36 6.6 6.9 8.6 6.0 6.9 7.9 5 1.2 2.0 2.9
2004 15.5 7.4 29 6.6 9.3 14.5 5.1 7.0 8.2 7 1.6 2.3 3.1
2005 12.9 7.1 31 6.7 6.4 10.5 5.5 6.8 7.9 5 1.8 2.3 3.4
2006 12.4 6.5 29 6.8 6.1 12.5 5.8 7.0 8.1 6 2.0 2.5 3.6
2007 14.6 6.2 36 6.6 6.5 11.7 5.9 6.9 8.1 5 1.3 2.8 3.3
2008 9.0 6.6 26 6.6 5.2 10.3 6.3 7.6 9.0 5 1.6 2.3 3.6
2009 11.7 8.1 27 6.6 5.7 14 8.4 5.6 6.2 6.7 6 1.8 2.9 3.7
2010 8.4 8.2 25 6.7 6.2 12 6.3 7.2 7.9 7 1.7 2.2 2.8
2011 12.0 8.3 24 6.6 7.1 14 12.3 5.4 6.6 7.3 7 1.4 2.5 6.6
2012 12.2 6.4 26 6.7 8.5 12.3 5.0 6.6 9.4 8 2.0 3.4 4.8
2013 12.2 6.2 27 6.5 5.5 17.2 4.8 6.6 7.6 7 1.6 2.7 4.5
2014 21.4 6.2 34 6.7 5.3 15.3 6.0 7.2 7.9 7 1.7 2.5 2.9
2015 22.3 7.4 37 6.7 6.1 10.2 6.4 7.7 8.5 6 1.3 3.0 6.8
2016 21.8 7.2 36 6.8 5.8 14.7 5.7 7.6 9.4 7 1.6 2.1 2.9
2017 21.7 6.6 31 6.8 6.2 9.8 5.0 6.5 8.3 6 1.4 2.6 4.2

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 7.4 33 6.6 7.1 13 11 1.5 6.7 9.4 5.9 1.2 2.8 10

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2015-08-19
2015-09-02
2016-08-03
2016-08-19
2016-09-01
2017-08-09
2017-08-23
2017-09-08
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 27 8.0 25 7.7 25 8.0 25 7.9 24 7.2 24 8.2 24 8.1 20 7.4
1 27 8.0 25 7.8 25 8.0 25 7.8 24 7.2 24 8.2 24 8.1 20 7.4
2 27 8.0 25 7.8 25 8.0 25 7.8 24 7.2 24 8.1 24 8.1 20 7.4
3 26 8.1 25 7.8 25 7.9 25 7.8 24 7.2 24 8.1 24 8.1 20 7.4
4 25 7.8 25 7.8 25 7.9 25 7.7 24 7.2 24 8.1 24 7.9 20 7.4
5 24 7.7 25 7.7 25 7.5 25 7.6 24 7.2 23 7.7 23 7.3 20 7.4
6 24 6.9 25 7.7 23 6.3 25 7.5 24 7.2 18 4.6 20 4.5 20 7.4
7 23 5.3 23 3.5 21 4.7 24 6.7 24 7.0 16 3.2 18 2.9 20 7.3
8 21 2.2 21 1.3 20 3.3 21 2.4 24 6.3 16 3.2 17 2.5 19 6.2
9 18 0.3 19 0.1 18 1.0 19 1.0 22 2.3 14 1.4 15 1.5 18 4.1
10 16 0.3 16 0.1 17 0.4 18 0.4 18 0.1 13 0.4 14 0.3 15 0.2
11 15 0.2 15 0.1 16 0.3 17 0.3 16 0.1 13 0.2 13 0.2 13 0.2
12 14 0.2 15 0.1 16 0.3 16 0.3 16 0.1 12 0.2 13 0.2 13 0.2
13 14 0.2 14 0.1 15 0.3 16 0.3 16 0.1 12 0.2 13 0.2 13 0.2
14 14 0.2 14 0.1 15 0.3 15 0.3 15 0.1 12 0.2 12 0.2 13 0.2

Recent temperature and dissolved oxygen profile plots

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