Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
T05 R01 NBPP PENOBSCOT 35 1 2.51 flushes/yr 298 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
13 m
(42 ft) 		4 m
(12 ft) 		700 ha
(1,729 ac) 		20,298,688 m3
(16,456 ac-ft) 		30 km2
(11 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
1984 4.3 4.4 4.5 2
1985 6.0 28 4.5 4.8 5.0 3
1996 6.0 25 8.0 15 4.7 4.7 4.7 1 3.7 3.7 3.7
2001 7.4 6.2 6.2 6.2 1
2004 4.5 7.1 12.1 3
2007 4.8 4.8 4.8 1
2008 24 5.3 23 6.7 8.0 35 5.4 5.5 5.6 1 3.3 3.3 3.3
2009 7.2 20 6.1 9.0 5.0 5.4 5.9 4 2.0 2.7 2.9
2010 21 6.6 22 5.5 7.8 4.9 5.5 5.9 5 1.9 2.8 3.4
2011 25 6.5 20 6.8 8.1 4.4 5.3 6.4 6 2.4 3.2 5.1
2012 24 6.3 16 6.9 7.0 7 4.7 5.4 6.5 4 2.2 2.8 3.5
2013 25 7.0 25 7.0 7.1 4.8 5.8 6.3 6 2.0 2.8 4.5
2014 25 6.5 20 6.7 7.8 4.7 5.6 6.2 8 2.0 3.8 7.2
2015 22 6.6 20 6.9 7.6 5.2 5.7 6.6 5 1.4 3.5 7.0
2016 19 7.0 21 6.8 7.4 5.5 6.1 6.8 5 1.3 2.4 3.4
2017 20 6.9 21 7.1 6.9 5.1 6.3 7.5 6 1.8 2.6 3.9
2018 21 7.1 22 6.8 7.1 5.2 6.0 6.7 5 2.0 3.1 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
23 6.5 22 6.4 7.7 7 25 4.3 5.6 12 3.9 1.3 3.1 7.2

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2016-08-04
2016-08-25
2016-09-12
2017-08-02
2017-08-18
2018-08-03
2018-08-29
2018-09-13
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 26 8.3 24 8.3 22 8.1 25 8.3 22 8.2
1 26 8.2 24 8.3 22 8.0 24 8.3 22 8.2 27 7.9 25 8.1 21 8.4
2 26 8.2 24 8.3 22 8.0 24 8.3 22 8.1 27 7.8 24 8.1 21 8.3
3 26 8.2 24 8.3 22 8.0 24 8.2 22 8.1 26 7.8 24 8.0 21 8.2
4 25 8.1 23 8.0 22 8.0 23 7.4 22 8.0 26 7.6 24 8.0 20 8.2
5 24 5.8 22 8.0 22 8.0 23 6.6 22 8.0 24 5.8 23 7.4 20 8.1
6 20 3.2 22 7.5 22 8.0 22 4.5 22 8.0 23 3.0 23 6.9 20 7.9
7 19 1.7 22 7.2 22 8.0 20 1.3 22 8.0 20 0.9 22 4.6 20 7.5
8 18 0.9 20 4.2 22 7.9 18 0.3 22 6.2 19 0.3 19 0.3 20 7.1
9 16 0.1 16 0.2 18 0.6 16 0.3 16 0.4 17 0.2 16 0.2 18 3.8
10 14 0.1 14 0.2 14 0.2 14 0.2 14 0.3 15 0.1 14 0.1 14 0.3
11 13 0.1 14 0.1 14 0.2 14 0.2 14 0.3 13 0.1 13 0.1 14 0.2
12 13 0.1 14 0.1 14 0.1 14 0.2 14 0.3 13 0.1 13 0.1 13 0.2
13 13 0.2 13 0.1

Most recent temperature and dissolved oxygen profile plots

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