Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
FRANKLIN HANCOCK 24 1 5.44 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
7 m
(24 ft) 		3 m
(10 ft) 		101 ha
(249 ac) 		3,170,355 m3
(2,570 ac-ft) 		27 km2
(10 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
1990 2.5 2.8 3.0 6
1991 8.0 42 6.7 14 3.0 3.9 4.5 5 5.8 5.8 5.8
1992 15.0 28 6.9 13 3.0 3.5 4.0 4 5.4 5.4 5.4
1993 3.0 4.0 5.0 6
1995 2.9 3.6 4.7 5
1996 5.0 28 15 32 2.7 2.7 2.7 1 11.0 12.0 13.0
1997 3.0 3.4 3.7 6
1998 2.9 3.0 3.0 2
1999 3.1 3.7 4.9 6
2000 3.1 3.8 4.4 6
2001 3.7 3.7 3.7 1
2002 41 7.5 31 7 11 3.0 3.4 3.9 4 6.6 6.6 6.6
2004 2.7 2.9 3.2 4
2009 15 2.1 2.9 3.6 6
2010 14 3.1 3.4 3.8 7
2011 14 2.7 3.2 3.7 6
2012 16 2.2 2.8 3.5 8
2013 16 2.1 2.8 3.3 6
2014 76 5.0 26 5.8 17 22 24 2.3 3.1 3.8 8 6.7 6.7 6.7
2015 18 2.5 3.4 4.0 6
2016 13 3.0 3.7 4.0 7
2017 14 2.6 3.5 3.8 6

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
58 8.1 31 6.2 13 16 22 2.1 3.3 5 5.3 5.4 7.3 13

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2015-09-18
2016-08-01
2016-08-16
2016-09-04
2016-09-21
2017-08-14
2017-09-04
2017-09-23
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 24 7.5 27 7.8 25 7.3 23 7.7 21 8.2 24 7.2 19 8.1 22 8.2
1 23 7.7 26 7.8 24 7.3 22 7.7 21 8.2 23 7.3 19 8.1 21 8.3
2 22 7.1 26 7.6 24 7.3 22 7.7 20 8.1 23 7.2 19 8.1 20 8.2
3 21 6.9 24 4.7 24 7.2 22 7.6 20 7.9 23 7.1 19 8.2 20 7.9
4 21 6.1 22 1.7 22 3.8 22 7.6 20 7.5 22 3.4 19 8.2 20 6.6
5 21 5.4 19 0.3 20 0.6 21 5.0 20 6.9 18 0.2 19 8.2 19 4.7
6 17 0.1 17 0.3 17 0.7 19 0.4 19 3.2 16 0.2 19 8.2 19 3.8
7 16 0.3 17 0.4 16 0.2 18 8.2 18 2.8

Recent temperature and dissolved oxygen profile plots

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