Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
MANCHESTER KENNEBEC 12 1 1.24 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
23 m
(75 ft) 		9 m
(30 ft) 		38 ha
(94 ac) 		3,517,803 m3
(2,852 ac-ft) 		8 km2
(3.2 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
1978 8.0 7 3.4 3.4 3.5 2 2.9 2.9 2.9
1980 12.0 3.6 3.6 3.6 1
1997 8.5 36 7.2 8.0 22 4.4 4.4 4.4 1 5.3 5.3 5.3
1998 10.0 5.3 5.3 5.4 1 4.7 4.7 4.7
1999 6.0 6.2 6.2 6.3 1 3.1 3.1 3.1
2000 13.5 6.8 11.0 4.2 5.0 5.7 6 4.6 4.6 4.6
2001 14.5 6.9 7.0 5.0 5.8 6.8 5 2.3 2.3 2.3
2002 3.7 5.6 7.1 6
2003 8.5 6.7 5.0 6.4 7.2 7.7 5 1.8 1.8 1.8
2004 10.0 6.7 6.0 5.0 5.7 6.6 6 9.7 9.7 9.7
2005 6.0 3.8 4.9 5.6 4 3.6 3.6 3.6
2006 41 8.6 33 6.9 10.0 3.8 4.4 4.8 4
2007 10.0 6.7 5.0 4.8 5.7 6.8 5 2.9 2.9 2.9
2008 10.0 6.4 7.0 5.5 6.1 6.8 6 3.9 3.9 3.9
2009 10.1 11.0 3.5 3.8 4.0 5 5.3 5.3 5.3
2010 10.4 6.2 5.8 6.3 6.9 6 0.9 1.8 2.6
2011 9.5 9.8 3.4 4.9 6.0 4 1.9 3.9 6.1
2012 4.7 5.3 6.2 4
2013 10.5 4.4 4.9 5.3 4
2014 9.7 9.8 3.9 5.2 5.9 6 1.8 2.7 3.2
2015 5.0 6.1 7.0 6
2016 4.9 6.3 7.6 6 2.5 3.4 4.2
2017 10.3 8.5 29 4.8 6.3 7.4 6 2.4 3.5 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
41 10 34 6.7 8.1 7 26 3.4 5.3 7.7 4.3 0.9 3.8 9.7

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2014-08-14
2014-09-15
2015-08-24
2015-09-25
2016-08-15
2016-09-22
2017-08-22
2017-09-28
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 24.3 8.0 20.0 8.7 26.0 7.6 20.8 8.2 25.5 8.0 22.1 8.4 24.6 8.2 23.0 11.1
1 23.3 8.0 19.6 8.7 25.1 7.7 20.7 8.2 25.4 7.9 21.6 8.4 24.2 8.4 22.9 11.1
2 21.3 8.2 19.0 8.7 24.9 7.7 20.5 8.1 24.7 7.9 21.5 8.3 24.2 8.4 21.1 11.7
3 20.1 8.5 18.9 8.7 24.8 7.6 20.5 8.2 24.3 7.9 21.4 8.4 22.6 8.3 20.7 11.8
4 20.1 8.6 16.1 6.9 19.4 9.3 20.4 8.2 20.9 11.2 20.9 8.4 16.3 8.9 18.8 12.3
5 18.1 8.5 11.2 8.4 13.5 9.2 15.2 8.8 14.0 12.1 17.9 11.6 10.3 8.7 13.7 10.7
6 14.6 9.2 8.4 8.0 9.3 8.7 10.5 7.8 9.8 9.6 11.6 8.9 7.2 8.4 9.2 10.8
7 9.4 9.3 6.6 7.7 7.2 8.4 8.0 7.2 7.8 9.1 8.6 7.7 6.0 8.2 7.1 10.7
8 6.9 8.3 5.6 7.7 6.1 8.4 6.4 7.4 6.8 8.7 7.1 7.7 5.2 8.3 5.8 10.6
9 6.0 8.0 5.2 7.5 5.5 8.2 5.7 7.3 6.3 8.7 6.3 7.9 4.9 8.0 5.1 10.8
10 5.2 7.9 5.0 7.0 5.1 8.2 5.2 7.3 5.9 8.9 5.9 7.8 4.6 7.7 4.8 10.5
11 5.0 7.6 4.7 6.8 4.9 8.1 5.0 7.3 5.6 8.9 5.7 8.0 4.4 7.3 4.5 10.1
12 4.8 7.3 4.6 6.7 4.7 7.9 4.7 7.0 5.5 8.8 5.5 7.8 4.3 7.0 4.4 10.0
13 4.6 7.1 4.6 6.7 4.6 7.8 4.7 6.8 5.4 8.8 5.4 7.7 4.3 6.8 4.3 9.2
14 4.6 6.9 4.5 6.4 4.5 7.5 4.6 6.7 5.3 8.5 5.3 7.6 4.2 6.4 4.3 8.4
15 4.5 6.9 4.5 6.2 4.5 7.3 4.5 6.5 5.3 8.3 5.3 7.2 4.2 5.8 4.3 8.0
16 4.5 6.1 4.4 7.3 4.5 6.3 5.3 8.2 5.3 7.0 4.2 5.4 4.3 7.5
17 4.4 6.5 4.4 5.8 4.4 7.0 4.4 6.2 5.2 7.8 5.2 6.9 4.2 5.0 4.2 6.8
18 4.4 5.2 4.4 6.7 4.4 5.9 5.2 7.6 5.2 6.4 4.2 4.5 4.2 6.0
19 4.3 5.9 4.4 4.2 4.3 6.4 4.3 5.1 5.1 6.8 5.2 5.7 4.2 3.6 4.2 4.4
20 4.4 2.9 4.3 5.3 4.3 4.2 5.1 5.9 5.1 4.8 4.2 2.2 4.2 2.0
21 4.3 4.6 4.4 0.9 4.2 4.0 4.3 2.2 5.1 3.9 5.1 2.8 4.2 0.2 4.2 0.3
22 4.4 0.3 4.2 0.8 4.3 0.9 5.0 2.6 5.0 1.0 4.2 0.2 4.2 0.2
23 4.3 0.8 4.4 0.3 4.2 0.6 4.3 0.5 5.0 0.7 5.0 0.9 4.2 0.1 4.3 0.2
24 4.4 0.3 4.2 0.5 4.3 0.5 4.9 0.7
25 4.3 0.7

Recent temperature and dissolved oxygen profile plots

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