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 5.5 6.5 7.3 6
1982 6.0 34 4.0 4.0 4.3 6.1 7.4 6 2.1 2.1 2.1
1983 3.4 6.0 7.0 6
1984 5.5 5.7 6.0 6
1985 5.0 5.9 7.5 6
1986 9.0 26 4.0 4.5 5.5 6.3 7.4 6
1987 5.0 5.8 7.0 6
1988 5.0 5.9 7.5 5
1989 4.5 5.6 6.4 6
1990 5.0 6.0 7.1 5
1991 6.0 26 7.2 6.0 6.2 6.2 6.2 1 2.6 2.6 2.6
1996 4.1 4.8 5.3 2
1997 6.0 28 7.1 4.0 7.0 7.2 7.3 1 1.4 1.4 1.4
2000 8.0 26 8.0 5.8 5.8 5.8 1 5.0 5.0 5.0
2001 6.3 27 7.2 6.0 4.9 4.9 4.9 1 5.1 5.1 5.1
2003 7.5 5.8 6.4 6.9 4
2004 6.5 2.7 5.6 7.7 4
2005 5.5 4.0 5.6 5.9 6.4 4
2006 15 6.4 28 6.9 6.0 5.0 4.8 5.3 5.9 3 6.0 6.0 6.0
2007 15 6.1 26 7.1 5.0 8.0 4.9 6.6 7.3 3 4.0 4.0 4.0
2008 8.0 5.3 6.2 7.3 4
2009 5.0 5.4 6.2 7.1 3
2010 5.8 6.1 6.5 2
2011 7.0 4.1 5.3 6.3 3
2012 6.0 6.8 7.0 7.2 2
2013 6.0 6.0 6.2 6.7 2
2014 16 7.0 22 6.6 6.0 5.6 6.1 6.6 2 5.0 5.0 5.0
2015 5.2 5.5 5.8 2
2016 6.8 7.0 7.2 1
2017 5.8 5.9 6.0 1
2018 6.0 6.4 6.8 1

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
15 6.8 27 7 5.6 6.2 4.2 2.7 6 7.7 3.4 1.4 3.9 6

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2009-09-06
2011-08-09
2011-09-04
2012-08-20
2012-09-02
2013-08-16
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 19.9 8.5 23.3 8.3 20.1 9.0 22.7 8.1 21.6 8.6 20.4 8.5 20.8 8.7 20.2 8.5
1 19.5 8.5 23.1 8.5 20.1 9.1 22.5 8.1 21.3 8.6 20.2 8.6 20.6 8.6 20.2 8.6
2 19.4 8.6 22.8 8.4 20.0 9.0 22.4 8.1 21.1 8.7 20.0 8.6 20.1 8.7 20.2 8.6
3 19.2 8.6 22.8 8.4 19.8 9.0 22.4 8.1 21.0 8.7 19.7 8.5 20.0 8.7 20.1 8.5
4 19.2 8.6 22.7 8.3 19.6 8.9 22.1 7.8 20.9 8.7 19.6 8.4 19.9 8.6 20.1 8.6
5 19.1 8.5 22.5 8.4 19.5 8.7 22.1 7.8 20.8 8.6 19.5 8.5 19.9 8.5 20.1 8.6
6 19.0 8.4 22.0 8.1 19.5 8.8 22.0 7.7 20.8 8.6 19.5 8.4 19.8 8.5 20.1 8.5
7 18.9 8.3 20.3 7.5 19.5 8.7 22.0 7.5 20.8 8.5 19.4 8.4 19.8 8.5 20.1 8.5
8 18.9 8.3 17.9 7.0 19.5 8.7 21.3 7.1 20.8 8.5 19.4 8.4 19.8 8.5 20.0 8.5
9 18.8 8.0 16.5 6.9 19.4 8.7 18.8 6.0 20.8 8.5 19.2 8.3 18.1 7.1 19.9 8.4
10 16.6 6.9 15.7 6.9 19.4 8.6 16.8 6.0 17.3 5.6 16.3 6.3 17.5 6.9 16.5 7.1
11 15.1 6.2 14.1 7.1 18.6 8.0 14.4 6.4 15.6 5.5 13.9 6.6 14.0 6.0 14.3 6.7
12 13.5 6.4 12.7 7.3 14.9 6.8 13.1 6.4 13.7 5.9 12.6 6.8 11.8 6.3 12.0 6.9
13 12.4 6.7 11.5 7.7 12.4 6.4 11.9 6.9 12.3 6.2 11.9 6.9 11.1 6.4 10.7 7.5
14 12.0 6.8 10.9 7.7 11.5 6.4 11.4 7.0 11.5 6.5 11.5 7.0 10.8 6.9 10.5 7.6
15 11.7 6.9 10.3 7.9 10.9 6.4 10.9 7.2 10.9 6.6 10.9 7.2 10.0 6.9 10.0 7.9
16 11.4 6.9 10.0 8.0 10.5 6.7 9.7 8.0
17 11.1 6.9 9.7 8.1 10.1 7.0 9.5 7.0 9.1 8.1
18 10.9 6.8 9.4 8.3 9.6 7.1 8.8 8.3
19 10.3 6.8 9.1 8.5 8.6 7.2 8.7 8.2
20 10.3 6.8 8.8 8.7 9.3 7.7 9.4 7.5 9.2 8.0 8.1 7.3 8.3 8.5
21 9.9 6.9 8.5 8.7 8.8 7.5 8.2 8.6
22
23 8.0 8.5
24 8.1 8.7 8.3 7.7
25 9.2 7.0 8.5 8.0 8.6 7.9 8.6 8.0 7.3 7.7
26 7.6 8.8
27 7.8 8.9
28 7.9 7.7
29 7.9 7.7
30 8.8 7.0 7.5 8.8 7.8 7.7 8.3 7.8 8.3 7.6 8.2 7.9 6.9 7.3 7.3 8.5
31
32
33
34
35 8.7 6.8 7.5 8.6 7.7 7.6 8.1 7.4 8.2 7.3 8.1 7.7 6.8 7.1 7.1 8.3
36
37
38
39
40 8.7 6.4 8.1 7.0 8.1 7.2 7.9 7.2 6.7 6.8 7.1 8.0
41
42
43
44
45 6.7 6.8

Most recent temperature and dissolved oxygen profile plots

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