Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
T03 R09 NWP PENOBSCOT 43 1 0.42 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
8 m
(25 ft) 		5 m
(16 ft) 		264 ha
(652 ac) 		12,535,933 m3
(10,163 ac-ft) 		10 km2
(4 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
1977 4 7.0 7.1 7.2 3
1978 7.2 7.2 7.2 1 1
1979 8.0 25 9 5.5 5.5 5.5 1 1.8 1.8 1.8
1987 2.5 25 5 6.5 6.5 6.5 1
2005 10 3.8 19 6.8 6 5.4 6.2 6.9 4 1.7 1.7 1.7
2006 5.4 6.3 7.2 3 2
2007 7.0 7.3 7.5 2 3
2008 6.1 7.0 7.3 3 7
2009 6.1 6.9 7.2 6 7
2010 5 6.1 6.7 7.2 5 6 1.4 1.4 1.4
2011 12 4.2 48 6.8 6 5 6.5 6.9 7.2 4 3 2.0 2.0 2.0
2012 4.5 5.9 6.9 3
2015 6.5 6.9 7.2 2 1
2016 3 5.0 19 7.0 6 7.5 7.5 7.5 1 1.1 1.1 1.1
2017 7.1 7.1 7.1 1 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
8.3 4.7 27 6.8 5.9 5 4.5 6.7 7.5 2.7 1.1 1.6 2

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1979-09-11
1987-08-26
2005-08-25
2011-08-15
2016-08-08
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 17 9.3 20 8.5 21 8.0 22 8.2 24 8.2
1 20 8.5 21 8.0 22 8.0 24 8.2
2 17 9.1 20 8.5 21 8.0 22 7.9 24 8.2
3 20 8.5 21 8.0 22 8.0 24 8.2
4 17 9.0 20 8.5 21 8.0 22 7.9 24 8.2
5 20 8.5 21 8.0 22 7.7 24 8.2
6 17 9.0 20 8.5 21 8.0 22 7.5 24 8.1
7 17 8.9 20 8.5 20 3.4 20 2.8

Recent temperature and dissolved oxygen profile plots

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