Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
WINTHROP KENNEBEC 12 1 1.51 flushes/yr 210 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
7 m
(23 ft) 		4 m
(13 ft) 		8 ha
(20 ac) 		308,109 m3
(250 ac-ft) 		1 km2
(0.3 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
1993 18 7.0 17 3.0 4.2 5.1 6 6.4 6.4 6.4
1998 19 2.2 3.8 4.8 6 7.0 7.0 7.0
2000 4.4 4.4 4.4 1
2003 20 6.6 21 5.3 5.3 5.3 1 11.9 11.9 11.9
2006 27 16 110 7.4 20 3.0 3.0 3.0 1
2009 20 28 420 2.2 2.2 2.2 1 8.5 8.5 8.5
2010 20 36 4.6 4.6 4.6 1 3.5 3.5 3.5
2011 17 12 4.5 4.5 4.5 1 3.6 3.6 3.6
2012 20 18 15 3.5 3.5 3.5 1 9.7 16.9 24.0
2013 22 17 4.1 4.1 4.1 1 6.6 6.6 6.6
2014 20 40 3.7 3.7 3.7 1 13.0 13.0 13.0
2015 19 11 40 4.8 4.8 4.9 1 3.6 4.2 4.8
2016 20 15 90 5.2 5.2 5.2 1 7.6 7.6 7.6
2017 20 16 155 4.0 4.0 4.0 1 7.5 7.5 7.5
2018 14 20 179 7.0 10 320 5.6 5.6 5.6 1 4.0 4.0 4.0

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
20 19 144 6.9 20 200 40 2.2 4.2 5.6 1.7 3.5 7.7 24

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2011-08-22
2012-08-24
2013-08-29
2014-08-19
2015-08-14
2016-08-25
2017-08-29
2018-08-31
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25.0 8.0 25.3 8.2 24.2 7.7 24.0 8.3 24.5 7.5 25 8.2 22.7 8.6 24.8 7.8
1 24.8 8.0 24.7 8.3 24.2 7.7 22.6 8.4 24.2 7.5 25 8.1 22.7 8.7 24.8 7.7
2 24.3 7.9 24.5 8.0 24.2 7.7 21.9 8.4 23.9 7.5 24 8.1 22.3 8.6 24.6 7.5
3 22.6 8.0 22.3 15.8 22.0 11.2 21.3 10.2 23.5 7.0 24 8.0 22.1 8.4 24.5 7.6
4 16.4 13.1 17.8 8.4 15.9 8.3 15.5 10.2 18.3 11.7 22 11.2 17.4 10.8 21.2 9.2
5 12.8 1.6 11.5 0.3 11.8 0.2 12.0 0.7 14.2 7.7 17 5.1 12.5 5.9 15.0 8.3
6 9.7 0.4 9.7 0.2 9.8 0.3 8.8 0.6 10.4 0.5 12 0.6 9.9 0.4 11.2 1.0
7 8.4 0.4 8.9 0.2 9.3 0.2 8.2 0.5 8.4 0.4 11 0.6 7.9 0.2 8.2 0.4

Most recent temperature and dissolved oxygen profile plots

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