Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
MANCHESTER KENNEBEC 12 1 7.19 flushes/yr 168 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
7 m
(24 ft) 		3 m
(9 ft) 		37 ha
(91 ac) 		1,034,859 m3
(839 ac-ft) 		6 km2
(2.2 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
1976 15 3.9 4.2 5.0 4 2.6 6.9 15.2
1989 10 7.3 7.3 7.3 1 3.3 3.3 3.3
2009 12 7 4.5 4.5 4.5 1 2.3 2.3 2.3
2010 12 6 6.2 6.2 6.2 1 2.9 2.9 2.9
2011 14 8 5.2 5.2 5.2 1 2.7 2.7 2.7
2012 11 6 7.0 7.0 7.0 1 1.6 1.6 1.6
2013 12 8 4.7 4.7 4.7 1 2.0 2.0 2.0
2014 11 12 5.2 5.2 5.2 1 2.7 2.7 2.7
2015 12 5 6.0 6.0 6.0 1 2.8 2.8 2.8
2016 14 7 12 7.7 7.7 7.7 1 1.8 1.8 1.8
2017 12 6 23 6.5 6.5 6.5 1 1.7 1.7 1.7
2018 14 12 50 7.2 5 12 6.5 6.5 6.5 1 2.0 2.0 2.0

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
14 12 50 7.2 7.7 16 10 3.9 5.9 7.7 1.2 1.6 2.7 15

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2011-08-23
2012-08-29
2013-08-19
2014-08-25
2015-08-28
2016-08-23
2017-08-24
2018-08-31
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 24 8.3 25 8.1 25 7.8 25 7.3 25 7.5 24 7.6 25 8.0 25 7.9
1 24 8.3 25 8.2 25 7.8 24 7.4 24 7.5 24 7.6 25 7.9 25 7.8
2 24 8.3 25 8.1 23 7.6 23 7.5 24 7.6 24 7.6 24 7.9 25 7.8
3 24 7.9 24 8.1 22 5.9 22 5.0 24 7.0 24 7.6 24 7.6 25 7.7
4 22 6.1 23 5.3 20 2.0 20 3.0 24 5.5 24 7.5 22 5.5 24 6.8
5 18 0.9 16 0.6 16 0.3 17 0.6 20 0.6 22 3.5 18 0.2 20 0.5
6 14 0.7 14 0.5 14 0.2 14 0.3 15 0.6 16 0.9 13 0.2 14 0.4
7 13 0.4 12 0.2 13 0.2 12 0.4 12 0.5 13 1.5 11 0.1 11 0.4
8 12 0.2 12 0.2 11 0.4 11 0.5 12 0.5 10 0.1 10 0.3

Most recent temperature and dissolved oxygen profile plots

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