Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
FRANKLIN HANCOCK 24 1 0.45 flushes/yr 164 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
14 m
(45 ft) 		4 m
(14 ft) 		147 ha
(363 ac) 		6,129,228 m3
(4,969 ac-ft) 		3 km2
(1.2 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 8 5.00 5.4 5.5 2
1979 7.5 13 34 5.00 5.0 5.0 1 4.5 4.5 4.5
1981 3.20 4.2 5.6 5
1982 4.5 32 15 120 3.50 4.3 5.6 6 2.9 2.9 2.9
1983 5.0 29 2.60 3.7 5.3 7
1989 2.9 2.9 2.9
1999 5.0 32 11 3.65 4.3 4.8 1 4.6 4.6 4.6
2002 3.85 4.3 4.6 3
2004 8 6.8 36 7.1 11 71 3.80 5.0 6.2 4 4.5 4.5 4.5
2011 4.65 5.5 6.2 3
2012 13 7.7 36 7.1 33 31 16 228 0.97 1.4 2.3 6 40.0 57.0 76.0
2013 14 7.5 33 7.0 18 20 279 96 2.25 3.7 5.6 9 3.5 10.3 20.0
2014 9 8.0 33 7.1 21 11 215 3.25 4.5 5.9 5 13.0 13.0 13.0
2015 0 8.0 32 7.4 20 14 141 1.50 2.7 4.0 4 4.7 17.4 30.0
2016 15 2.70 4.6 5.5 3
2017 7 9.5 39 7.2 19 15 1.76 2.7 4.7 5 20.0 20.0 20.0
2018 7 9.0 40 7.5 27 28 46 0.69 1.6 2.3 7 16.0 25.0 35.0

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
8.3 7.1 34 7.2 19 19 103 162 0.7 3.9 6.2 4.4 2.9 15 76

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2015-08-20
2015-08-24
2016-09-02
2017-08-26
2017-08-31
2017-09-10
2018-08-11
2018-08-29
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 27 8.7 25.3 8.0 22 7.7 22 8.5 21 9.1 20 8.3 26.5 8.5 26 9.8
1 27 8.7 25.2 8.0 23 7.6 22 8.5 21 9.1 20 8.3 26.4 8.5 26 9.9
2 26 8.8 25.2 8.0 23 7.6 22 8.6 21 9.0 19 8.3 25.7 7.6 25 9.9
3 25 8.9 24.7 7.4 23 7.7 22 8.6 21 8.8 19 8.3 25.6 7.1 24 7.9
4 24 7.3 23.7 5.6 23 7.6 22 8.6 21 8.8 19 8.2 24.6 4.3 23 5.1
5 23 4.1 22.7 1.8 23 7.6 22 8.6 21 8.9 19 8.2 20.5 0.0 22 2.1
6 22 0.4 21.0 0.0 22 6.5 22 7.1 21 8.7 19 8.1 18.1 0.0 20 0.3
7 19 0.3 18.0 0.0 22 0.3 21 0.9 21 7.7 19 8.1 15.9 0.0 17 0.2
8 16 0.2 15.6 0.0 19 0.2 18 0.0 18 0.7 19 7.7 14.3 0.0
9 14 0.2 13.3 0.0 16 0.2 14 0.0 14 0.6 19 5.5 12.2 0.0
10 12 0.2 11.0 0.0 15 0.3 13 0.0 13 0.5 16 0.1 10.4 0.0
11 9.8 0.0 13 0.3 12 0.0 12 0.4 12 0.0 9.5 0.0
12 9.1 0.0 12 0.3 12 0.0 12 0.4 11 0.0 9.2 0.0
13 8.8 0.0 12 0.3 11 0.0 11 0.0 9.0 0.0
14 12 0.3 11 0.0 11 0.0 8.9 0.0

Most recent temperature and dissolved oxygen profile plots

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