Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
RANGELEY FRANKLIN 28 1 0.39 flushes/yr 1518 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
44 m
(145 ft) 		15 m
(49 ft) 		2,429 ha
(6,002 ac) 		359,000,000 m3
(291,046 ac-ft) 		114 km2
(44 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
1970 5.8 5.8 5.8 2
1971 6.7 7.5 9.4 4
1972 20 6 4.3 5.8 6.9 8.5 4
1973 6.4 7.6 8.8 2
1974 7.1 28 7.0 7.0 7.0 1
1981 6.1 6.8 7.3 6
1982 7.0 42 6 3.0 6.1 7.4 8.3 6 2.9 2.9 2.9
1983 5.0 6.7 7.8 6
1984 6.0 6.4 7.5 6
1985 6.0 6.6 7.1 6
1986 8.0 32 4 7.0 5.8 6.7 8.1 6
1987 5.2 6.4 7.5 6
1988 6.8 7.0 7.2 5
1989 4.0 6.0 7.0 6
1990 4 6.0 7.0 8.1 5 2.6 2.6 2.6
1991 7.0 31 7.3 9 7.6 7.6 7.6 1 2.3 2.3 2.3
1992 5 5.6 6.1 7.0 4
1996 4.6 6.2 7.3 5
1997 6.0 35 7.2 3 6.5 7.6 9.6 6 1.3 1.3 1.3
1998 5.4 7.0 8.1 5
1999 6.7 8.0 9.6 6
2000 5.8 7.2 8.5 5
2001 5.4 8.3 10.7 3
2002 17.0 9.5 38 3 5.8 7.2 8.1 6 1.4 1.4 1.4
2003 4.5 11.0 40 2 6.2 7.9 9.8 6 1.2 1.2 1.2
2004 5 6.0 7.6 8.6 5
2005 5.4 7.7 9.5 4
2006 5 5.7 7.6 8.6 4
2007 6.2 8.0 10.4 4
2008 4
2009 6.0 7.5 9.4 2
2010 6.2 6.7 7.2 2
2011 4 4.6 4.6 4.6 1 2.6 2.6 2.6
2012 14 5.2 6.5 7.7 2
2014 6.8 7.2 7.5 2
2015 8.0 8.0 37 7.2 3 4.8 7.5 9.8 6 5.0 5.0 5.0
2016 7.5 8.6 9.3 6
2017 6.0 8.3 9.7 5
2018 5.8 8.7 10.9 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
9.8 8 34 7.2 4.3 6.3 4.8 4 7.1 11 4.4 1.2 2.4 5

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1997-08-12
2002-08-15
2003-08-02
2003-08-18
2004-08-02
2012-08-13
2015-08-10
2015-08-20
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 21.4 8.9 24.3 9.1 21.8 9.8 22.4 7.9 23.2 7.0 23.4 7.3 21.8 8.5 23.2 8.8
1 21.6 8.8 24.3 9.1 21.8 9.8 22.4 7.8 22.9 8.3 23.2 7.4 21.2 8.1 23.2 8.7
2 21.6 8.8 24.2 9.0 21.8 9.8 22.4 7.8 22.7 8.5 23.0 7.4 20.8 7.5 23.2 8.7
3 21.4 8.8 23.9 9.1 21.6 9.8 22.3 7.8 22.7 8.4 22.7 7.4 20.6 7.3 22.7 8.8
4 21.3 9.0 22.8 9.4 21.6 9.7 22.2 7.8 22.7 8.3 22.7 7.4 20.4 7.0 21.0 9.0
5 21.1 9.0 21.8 9.3 21.6 9.7 22.2 7.8 22.6 8.3 22.7 7.4 20.3 6.8 20.8 9.0
6 21.1 9.0 21.0 9.3 21.5 9.7 22.1 7.8 22.5 8.4 22.7 7.3 20.2 6.5 20.6 8.9
7 20.9 9.0 20.3 9.1 18.9 9.6 20.7 7.9 22.5 8.4 22.7 7.3 19.6 6.2 20.3 8.8
8 18.0 8.9 18.8 8.9 17.9 9.7 17.2 8.3 22.5 8.4 22.6 7.3 19.2 5.8 20.1 8.7
9 17.2 8.8 18.2 8.9 16.5 9.7 16.0 8.4 22.0 8.3 17.8 7.6 19.0 5.7 19.5 8.5
10 15.8 8.8 16.8 8.9 16.5 9.5 15.2 8.4 21.4 8.2 14.9 7.1 18.8 5.4 19.2 8.3
11 12.8 9.2 14.5 9.1 13.3 8.5 20.3 8.0 12.3 7.2 18.2 5.2 17.2 8.0
12 11.9 9.4 13.4 9.1 12.1 8.7 20.2 8.0 11.5 7.4 17.0 5.1 15.0 8.3
13 10.9 9.6 12.3 9.3 10.9 8.7 20.1 8.0 10.8 7.6 14.9 5.2 13.3 8.6
14 10.0 9.7 11.6 9.4 10.6 8.6 17.9 8.0 9.9 7.7 13.1 5.4 12.1 8.9
15 9.1 9.9 10.8 9.6 12.5 9.6 10.1 8.6 17.2 8.0 9.6 7.8 12.3 5.2 11.7 9.0
16 8.5 10.0 10.4 9.6 9.4 7.9 11.5 5.2
17 8.1 10.1 10.0 9.4 9.4 8.5 9.0 8.0 10.7 5.2 10.3 9.2
18 7.9 10.2 9.7 9.6 8.9 8.1 10.4 5.1
19 7.6 10.2 9.6 9.7 8.9 8.3 16.9 8.1 8.8 8.1 10.0 9.4
20 7.5 10.3 9.5 9.7 10.1 10.2 8.6 8.1 10.0 5.0
21 9.3 9.8 7.6 8.4 8.5 8.4 9.6 9.5
22 7.1 10.1 9.2 9.8 8.3 8.4
23 9.1 9.9 8.4 8.4 8.3 8.2 9.4 9.4
24 7.1 10.1 9.0 10.0 8.2 8.1 9.6 4.8
25 8.9 10.0 8.5 10.1 8.2 8.3 13.6 8.2 8.2 8.1 9.2 9.3
26 6.9 10.3 8.7 9.9 8.2 8.1
27 8.6 9.8 8.0 8.3
28 6.8 10.2 8.6 9.9 12.5 8.1 8.1 8.3 9.3 4.7
29 8.5 10.0 7.9 8.3 8.0 8.4
30 6.5 10.4 8.3 9.9 7.1 10.0 8.7 8.3 7.9 8.4 8.9 4.5 8.9 9.6
31
32
33
34
35 6.1 10.3 7.9 9.4 6.8 7.8 7.5 8.3 10.9 8.6 7.7 8.2 8.4 4.3 8.4 9.7
36
37
38
39
40 5.9 9.9 7.7 8.9 6.5 4.5 7.2 7.7 9.9 8.2 8.5 2.3 8.1 8.8
41
42
43
44
45 5.9 9.5 6.2 1.4 7.2 6.2 9.4 6.2

Most recent temperature and dissolved oxygen profile plots

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