Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
GRAY CUMBERLAND 5 1 0.42 flushes/yr 306 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
18 m
(59 ft) 		9 m
(29 ft) 		76 ha
(189 ac) 		6,780,000 m3
(5,497 ac-ft) 		4 km2
(1.7 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
1974 6.4 4.3 5.5 7.1 6 4.2 4.9 6.0
1975 6.4 29 6.6 5.5 6.7 8.5 8 3.0 4.3 7.1
1976 8.3 3.3 5.6 8.4 8 1.3 4.0 8.3
1977 6 5.2 5.2 5.2 1
1981 7.5 7.8 8.5 4
1984 4.5 6.0 13 4.8 5.7 6.1 4 7.1 7.1 7.1
1986 5.7 6.8 7.9 6
1987 6.0 27 5.0 12 5.3 6.9 8.0 4
1988 4.0 6.6 9.5 5
1989 4.3 5.3 6.2 6
1991 4.2 5.7 7.6 5
1992 5.5 5.8 6.2 4
1994 6.5 6.9 7.0 2
1995 4.6 5.3 6.1 2
1996 4.7 5.3 5.7 2
1997 3.6 4.2 4.7 2
1998 5.0 30 7.0 12 5.5 5.5 5.5 1 4.3 4.3 4.3
1999 4.0 32 8.0 12 6.2 6.3 6.4 1 5.4 5.4 5.4
2001 5.3 6.6 7.8 5
2002 5.2 6.3 7.8 4
2003 5.7 6.6 8.0 5
2004 10 8.0 30 7.0 5.0 6 5.4 6.2 7.5 5 2.9 2.9 2.9
2005 4.4 5.0 6.8 3
2006 4.4 5.6 6.8 7
2007 6.7 4.6 5.8 7.5 7
2008 12 4.2 44 6.8 7.0 17 5.3 6.4 7.8 7 3.6 3.6 3.6
2009 4.7 5.5 6.4 7
2010 5.7 4.4 6.4 8.0 8
2011 6.2 4.2 6.0 7.6 8
2012 5.2 4.5 5.5 6.9 9
2013 11 4.8 38 6.9 7.0 5.0 21 5.6 6.4 7.0 7 3.9 3.9 3.9
2014 5.5 6.2 7.1 5
2015 6.0 5.8 6.7 7.5 7
2016 6.3 7.0 7.2 2
2017 9 7.0 50 7.1 8.0 5.3 5.8 6.1 3 3.5 3.5 3.5
2018 6.4 6.9 7.5 5

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 5.5 35 6.9 6.8 6 12 3.3 6.1 9.5 4.9 1.3 4.4 8.3

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2013-09-04
2014-08-15
2014-08-19
2015-08-07
2015-08-17
2015-09-12
2017-08-06
2017-08-29
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25.2 8.3 24.0 9.0 23.5 8.6 24.6 8.1 27.2 8.9 24.3 8.3 24.5 9.9 22.1 8.4
1 24.9 8.4 23.7 9.1 23.2 8.8 24.6 8.1 27.0 9.0 24.0 8.6 24.5 10.1 22.1 8.5
2 24.6 8.5 23.6 9.2 22.6 8.9 24.6 8.2 25.8 9.0 23.9 8.5 24.5 10.1 22.0 8.4
3 24.3 8.5 23.5 9.2 22.6 8.9 24.6 8.2 25.2 9.2 23.7 8.6 24.5 10.2 22.0 8.4
4 24.0 8.3 23.4 9.1 22.5 8.9 24.6 8.2 24.1 9.5 23.6 8.6 23.1 10.7 21.9 8.4
5 22.8 8.6 21.8 9.8 21.5 9.4 20.4 11.4 21.5 11.9 23.1 9.2 17.6 13.1 20.4 9.8
6 17.3 10.8 15.9 12.8 17.3 11.4 14.5 12.7 15.1 14.4 17.2 13.1 12.6 12.2 13.5 10.3
7 13.2 9.6 12.5 12.1 12.3 10.8 10.8 11.6 11.3 12.9 12.6 12.4 10.2 9.9 10.3 8.6
8 10.7 6.8 9.8 8.5 9.7 8.3 8.9 10.7 9.3 11.7 10.3 10.8 8.4 8.2 8.8 6.4
9 9.4 4.6 8.7 7.2 8.7 6.5 8.1 9.6 8.2 10.2 8.6 7.0 7.8 7.1 8.0 4.8
10 8.5 3.1 8.1 4.7 8.1 3.5 7.5 5.5 7.7 6.0 8.1 4.6 7.3 5.1 7.4 3.1
11 8.1 1.3 7.8 2.8 7.8 2.1 7.3 4.2 7.4 3.7 7.6 0.9 7.1 4.6 7.2 1.6
12 7.9 0.2 7.6 2.0 7.6 0.5 7.1 2.0 7.2 0.8 7.3 0.1 7.0 2.2 7.0 0.6
13 7.7 0.2 7.5 0.5 7.5 0.2 7.1 1.2 7.1 0.4 7.2 0.1 6.9 0.9 6.9 0.4
14 7.7 0.1 7.5 0.2 7.4 0.1 7.1 1.0 7.1 0.4 7.2 0.1 6.9 0.9 6.9 0.4
15 7.6 0.1 7.4 0.1 7.4 0.1 7.0 0.7 7.0 0.1 7.2 0.1

Most recent temperature and dissolved oxygen profile plots

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