Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
T03 ND HANCOCK 34 1 0.22 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
21 m
(70 ft) 		8 m
(27 ft) 		568 ha
(1,403 ac) 		45,787,934 m3
(37,121 ac-ft) 		14 km2
(5.4 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
1978 8.5 8.5 8.5 1
1989 3.5 16 3 10.8 10.8 10.8 1 2.2 2.2 2.2
2005 3.0 7.1 8.4 8.9 8
2006 11 4.3 21 6.9 4.5 6.5 7.3 7.8 8
2007 4.0 6.5 7.7 8.4 6
2011 9.2 9.4 9.6 3
2012 10 4.5 21 6.8 3 9.4 10.0 10.3 6 1.4 1.4 1.4
2013 8.4 9.1 9.4 6
2014 7.3 8.9 9.8 4
2015 8.4 9.8 10.9 6
2016 8.0 9.6 11.1 6
2017 8.7 10.1 10.8 4

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
10 4.1 19 6.9 3 3.8 6.5 9.1 11 4.9 1.4 1.8 2.2

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1989-09-21
2012-09-20
Depth (m) TEMP DO TEMP DO
0 20 9.0 18 8.2
1 19 8.9 18 8.2
2 19 9.1 18 8.2
3 18 9.2 18 8.2
4 18 9.2 18 8.2
5 18 9.2 18 8.2
6 18 9.1 18 8.1
7 18 9.1 18 8.1
8 18 9.2 18 8.1
9 18 9.1 18 8.0
10 16 8.7 16 7.1
11 13 8.2 13 5.5
12 12 7.2 12 4.8
13 11 6.7 11 4.1
14 10 5.1 11 3.5
15 10 4.4 10 3.2
16 10 3.8
17 10 3.6 10 2.8
18 10 2.9 10 2.1

Recent temperature and dissolved oxygen profile plots

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