Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
T06 ND BPP WASHINGTON 35 1 2.29 flushes/yr 298 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
13 m
(44 ft) 		6 m
(20 ft) 		892 ha
(2,203 ac) 		50,414,220 m3
(40,871 ac-ft) 		22 km2
(8.4 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
1989 6.0 25 5.0 6.4 6.4 6.4 1 4.1 4.1 4.1
2004 5.7 6.1 6.4 2
2009 7.6 20 6.1 4.5 7.2 7.9 9.1 4 1.5 2.2 3.0
2010 16 6.7 24 5.7 4.4 6.8 7.8 8.9 5 1.4 2.0 2.4
2011 18 6.6 21 6.9 5.3 6.5 7.4 8.4 7 1.3 1.9 2.5
2012 17 6.6 16 7.0 4.5 6.8 7.9 8.8 5 1.1 1.9 2.3
2013 19 7.0 25 7.1 4.8 6.8 7.6 8.6 5 1.6 2.0 2.9
2014 18 6.8 21 7.0 5.0 6.8 8.1 8.9 5 1.7 2.0 2.7
2015 17 7.2 21 7.1 4.4 7.2 8.3 9.7 5 1.4 2.1 4.0
2016 15 7.2 22 6.7 4.6 7.0 8.5 9.7 5 1.1 1.5 2.1
2017 12 7.3 22 6.8 4.2 7.3 9.1 9.8 7 1.4 2.1 2.7
2018 14 7.5 25 6.9 3.6 7.1 8.6 9.6 6 1.0 1.9 3.0

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
16 6.9 22 6.4 4.6 5.7 7.8 9.8 4.8 1 2.2 4.1

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2016-09-06
2017-08-10
2017-08-28
2017-09-15
2018-08-01
2018-08-06
2018-08-27
2018-09-14
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 23 8.5 23 8.4 22 8.6 21 9.1
1 22 8.5 23 8.4 22 8.6 20 9.1 26 8.3 27 8.2 24 8.3 22 8.5
2 22 8.4 23 8.4 21 8.6 20 9.1 26 8.3 26 8.2 24 8.3 22 8.4
3 22 8.4 23 8.4 21 8.5 20 9.0 25 8.2 26 8.2 23 8.3 21 8.3
4 22 8.4 22 8.3 21 8.4 20 9.0 25 8.2 26 8.1 23 8.3 21 8.3
5 22 8.4 22 8.3 21 8.4 20 9.0 25 8.2 25 8.0 23 8.2 21 8.2
6 22 8.4 22 8.2 21 8.3 19 8.9 25 7.9 25 7.7 23 8.2 21 8.1
7 22 8.3 22 8.2 21 8.3 19 8.9 23 7.2 22 6.3 23 8.2 21 8.1
8 22 8.2 22 8.0 21 8.2 19 8.7 20 5.6 20 5.0 22 5.7 21 8.0
9 22 8.1 20 5.0 21 8.2 19 8.7 19 4.4 19 4.0 20 3.2 21 7.9
10 22 7.7 17 2.8 21 8.1 19 8.6 18 3.5 18 3.4 18 1.4 20 6.3
11 21 5.4 16 2.3 19 4.5 19 8.6 18 3.2 18 2.8 18 0.9 19 0.7
12 18 0.9 16 2.1 18 2.6 19 8.4 18 2.6 18 2.3 18 0.7 18 0.3
13 18 0.2 15 1.6 16 0.3 18 2.5 18 1.9 17 0.2

Most recent temperature and dissolved oxygen profile plots

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