Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
T09 SD HANCOCK 24 1 0.57 flushes/yr 120 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
36 m
(119 ft) 		10 m
(34 ft) 		442 ha
(1,092 ac) 		46,140,182 m3
(37,406 ac-ft) 		24 km2
(9.4 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 4.0 6.7 6.7 6.7 1
1979 4.0 7 7 7.0 6.7 6.7 6.7 1 2.2 2.2 2.2
1980 2.5 38 5.0 5.9 7.7 4
1981 11.7 38 6 8.0 7.7 7.7 7.7 1 2.1 2.1 2.1
1983 5.0 2 4.0 7.5 7.5 7.5 1 2.7 2.7 2.7
1984 5.4 5.5 5.5 6
1985 5.6 5.9 6.0 5
1986 2.2 22 4 5.5 7.5 7.5 7.5 1
2009 6.0 6.4 7.4 3
2010 4 6.0 5.4 6.6 7.8 6 2.7 2.7 2.7
2011 6.0 7.1 8.0 8
2012 20 2.6 29 6.5 5 5.8 6.4 6.9 8 3.2 3.2 3.2
2013 5.8 6.6 7.2 8
2014 5.3 6.8 8.4 6
2015 5.6 7.2 8.3 6
2016 7.2 7.2 7.2 1
2018 14 4.0 33 6.5 4 9.2 9.2 9.2 1 3.0 3.0 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
17 4.6 32 6.5 4.6 7 5.8 5 6.9 9.2 3.9 2.1 2.7 3.2

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1979-09-07
1980-08-21
1981-08-21
1983-08-24
1986-08-12
2010-08-23
2018-08-29
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 19.0 8.4 21.0 9.1 21.0 9.1 22.0 8.5 22.5 8.5 22.3 8.3 25.0 8.6
1 21.8 8.5 22.4 8.2 24.5 8.6
2 19.5 8.4 20.5 8.9 20.5 8.9 21.8 8.5 22.2 8.5 22.4 8.2 24.3 8.6
3 21.5 8.5 22.4 8.1 24.2 8.6
4 19.0 8.5 20.3 8.9 20.3 8.9 21.3 8.5 21.8 8.5 22.4 8.1 24.1 8.6
5 21.5 8.5 22.3 8.0 23.8 8.5
6 19.0 8.5 20.0 8.8 20.0 8.8 21.5 8.4 21.8 8.5 21.8 7.8 23.2 8.4
7 21.0 8.3 21.2 8.5 20.3 6.7 21.4 7.5
8 19.0 8.5 19.8 8.6 19.8 8.6 15.0 7.8 20.0 8.3 17.5 6.3 17.2 6.6
9 16.0 6.8 13.8 7.6 18.2 8.0 15.2 6.4 14.7 6.9
10 14.0 6.6 14.8 7.2 14.8 7.2 12.5 7.8 15.0 7.7 14.1 6.6 13.6 7.1
11 12.5 6.5 14.5 7.7 13.3 7.1 11.9 7.7
12 12.0 6.5 11.2 8.9 11.2 8.9 11.0 8.4 13.0 7.7 12.3 7.6 10.1 8.9
13 12.0 8.0 11.5 7.9 9.3 9.2
14 10.5 6.8 10.2 8.0 10.2 8.0 10.0 8.6 11.0 8.3 11.0 8.1 8.9 8.4
15 9.9 8.2 10.4 8.0 8.7 8.5
16 9.0 7.0 9.5 8.5 9.5 8.5 9.0 8.5
17 9.4 8.2 8.2 8.8
18 8.5 7.6 8.9 8.2 8.9 8.2 8.5 8.6 8.9 8.2
19 8.7 8.3 7.8 8.6
20 8.0 7.7 8.0 8.8 8.0 8.8 8.0 8.6 8.0 8.2 7.9 8.6
21 7.3 8.7
22 7.0 7.9 7.5 8.7 7.5 8.7 7.5 8.5 7.5 8.3
23 7.0 8.7
24 7.0 7.5 7.0 8.6 7.0 8.0
25 6.8 8.7 6.7 8.4
26 6.5 7.0 7.0 7.2 7.0 7.2 7.0 7.9
27 6.5 7.1
28 6.0 6.7 6.0 7.4 7.0 7.6 6.4 0.3
29
30 6.0 6.2 6.8 6.3 6.8 6.3 6.8 7.3 6.3 6.8
31
32
33
34
35 6.8 5.0 6.8 5.0

Most recent temperature and dissolved oxygen profile plots

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