Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
RANGELEY FRANKLIN 18 1 0.9 flushes/yr 1467 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
40 m
(132 ft)
10 m
(34 ft)
6,721 ha
(16,608 ac)
693,360,070 m3
(562,116 ac-ft)
380 km2
(147 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
1981 4.0 4.9 6.2 6
1982 8.0 38 10 5 3.4 4.8 6.2 6 2.9 3.0 3.0
1983 2.5 4.5 5.4 6
1984 3.5 4.2 5.0 6
1985 3.5 4.4 5.3 6
1986 9.5 27 7 6 4.2 4.7 5.5 6
1987 4.0 4.7 5.5 6
1988 4.0 4.6 5.0 5
1989 4.0 4.3 4.7 6
1990 4.0 4.7 5.2 5
1991 7.0 27 7.1 6 4.9 4.9 4.9 1 3.5 3.5 3.5
1996 3.4 4.2 4.9 5
1997 4.5 4.9 5.7 5
1999 6.0 29 7 4.1 4.1 4.1 1 5.1 5.1 5.1
2001 6.5 27 7.0 10 5.0 5.0 5.0 1 4.8 4.8 4.8
2002 7.0 4.3 5.0 5.5 6
2003 4.1 4.7 6.3 3
2004 7.0 5.2 5.4 5.8 3
2005 8 4.5 5.3 6.2 4
2006 9 4.0 3.8 5.4 6.5 3
2007 22 6.6 27 7.1 7 7.0 4.0 4.7 5.7 4 6.5 6.5 6.5
2008 7.0 3.0 4.3 5.2 7
2009 3.9 4.6 5.8 6 2
2010 4.0 5.0 5.5 7
2011 9.3 3.1 4.3 5.4 8
2012 7.0 3.7 4.7 5.5 8
2013 8.0 3.6 4.1 4.6 9
2014 21 8.0 22 6.5 7 4.0 4.8 5.4 8 5.9 5.9 5.9
2015 3.7 4.7 5.8 7
2016 4.5 5.1 6.8 7
2017 3.6 4.2 4.8 8
2018 2.6 4.2 5.3 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
22 7.4 28 6.8 7.9 7 5.5 2.5 4.7 6.8 5.5 2.9 4.8 6.5

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2008-09-11
2011-08-09
2011-09-04
2012-08-20
2012-09-02
2013-08-13
2014-09-08
2017-08-21
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 18 8.7 24.2 8.0 21 8.8 23 8.1 22 9.0 20 8.9 20 8.7 21 8.7
1 18 8.5 23.5 8.1 21 8.9 22 8.0 22 8.8 20 8.7 20 8.7 21 8.7
2 18 8.6 23.3 8.1 20 8.6 22 7.9 21 8.7 20 8.9 20 8.6 20 8.6
3 18 8.5 23.2 7.8 19 8.4 22 7.9 21 8.8 20 8.8 20 8.6 20 8.4
4 18 8.5 22.9 7.9 19 8.1 22 8.0 21 8.9 20 8.8 20 8.5 20 8.5
5 18 8.5 21.4 7.5 18 7.6 22 7.9 21 8.8 20 8.6 20 8.4 20 8.4
6 18 8.4 20.3 6.9 18 7.3 22 8.0 21 8.9 20 8.5 20 8.3 20 8.4
7 18 8.4 18.4 6.1 17 7.3 21 6.5 21 8.5 19 8.2 19 7.2 19 7.5
8 18 8.5 16.2 6.2 17 6.9 17 4.8 20 8.2 17 6.4 18 6.6 17 6.6
9 17 7.6 13.0 6.2 17 6.7 14 4.6 16 4.7 13 6.1 17 6.2 14 5.5
10 15 5.5 12.6 5.8 15 5.7 13 4.4 14 4.2 12 6.0 16 5.5 13 5.4
11 13 5.0 11.9 5.8 13 5.0 12 4.2 13 4.0 12 5.7 14 4.9 12 5.4
12 12 4.9 11.2 5.9 12 4.5 12 4.2 12 3.8 11 5.8 13 4.6 12 5.4
13 12 4.7 10.8 6.0 11 4.4 12 4.2 12 3.8 11 5.8 12 4.3 12 5.2
14 12 4.6 10.6 5.9 11 4.2 12 4.2 12 3.3 11 5.8 12 3.9 11 5.1
15 12 4.5 10.3 5.5 11 4.1 12 4.1 12 3.3 11 5.7 12 3.6 11 5.0
16 12 4.3 10.1 5.7 11 3.9 11 5.5 11 4.9
17 11 4.2 10.0 5.5 11 3.9 11 3.8 12 3.2 11 5.2 11 3.3 11 4.9
18 11 4.1 10.0 5.5 10 3.8 11 2.8 11 4.8
19 11 4.1 9.9 5.5 10 3.7 11 3.4 11 3.0 11 4.6
20 11 4.1 9.9 5.5 10 3.5 10 5.0 11 4.7
21 11 4.0 9.7 5.1 10 3.6 11 2.8 11 2.1 11 4.6
22 11 4.0 10 4.4 11 4.4
23 11 2.0

Most recent temperature and dissolved oxygen profile plots

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