Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
RANGELEY FRANKLIN 18 1 0.9 flushes/yr
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
1996 4.9 5.6 6.6 6
1997 5.2 6.0 7.3 7
1998 4.7 5.4 6.4 8
1999 6.5 28 5.0 4.8 5.9 7.4 6 3.7 3.7 3.7
2000 4.4 5.3 6.3 8
2001 4.3 5.2 6.1 5
2002 5.0 4.5 5.5 6.9 6
2003 5.5 5.2 6.0 7.0 9
2004 5.7 5.2 5.9 7.4 8
2005 5.5 5.1 5.7 6.8 5
2006 15 6.4 28 6.9 5.0 4.0 4.4 5.3 5.9 7 6.0 6.0 6.0
2007 15 6.0 26 7.0 5.0 5.5 4.9 6.1 6.9 3 4.1 4.1 4.1
2008 4.0 6.0 6.1 6.4 2
2009 5.2 4.9 5.7 6.8 6
2010 6.2 6.3 6.3 1
2011 6.5 4.1 4.5 4.9 2
2012 5.0 6.0 6.5 6.8 2
2013 5.0 5.6 6.0 6.5 2
2014 16 9.0 22 6.6 5.0 6.4 6.4 6.4 1 5.4 5.4 5.4
2015 5.3 5.9 6.5 2
2016 6.2 6.5 6.7 1
2017 6.4 6.5 6.6 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 7 26 6.8 5.2 5.1 4.1 5.8 7.5 4.5 3.7 4.8 6

Most recent late summer temperature and dissolved oxygen 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 20 8.5 23 8.2 21 8.6 23 8.0 22 8.5 20 8.7 20 8.6 20 8.5
1 20 8.5 23 8.3 20 8.6 22 8.1 21 8.8 20 8.3 20 8.6 20 8.5
2 20 8.6 22 8.3 20 8.7 22 8.1 21 8.8 20 8.5 20 8.6 20 8.5
3 19 8.5 22 8.2 20 8.6 22 8.0 21 9.0 20 8.3 20 8.6 20 8.3
4 19 8.4 22 8.2 20 8.7 22 8.0 21 8.8 19 8.4 20 8.5 20 8.5
5 19 8.5 22 8.0 20 8.6 22 7.8 21 8.6 19 8.3 20 8.5 20 8.4
6 19 8.5 22 7.8 20 8.5 22 7.8 21 8.7 19 8.4 20 8.5 20 8.4
7 19 8.5 21 7.2 19 8.4 22 7.8 21 8.6 19 8.3 20 8.4 20 8.5
8 19 8.4 20 6.7 19 8.2 22 7.6 21 8.2 19 8.3 20 8.4 20 8.4
9 19 8.3 16 6.0 19 8.2 20 5.9 21 8.4 19 8.2 19 7.9 20 8.5
10 18 7.5 15 5.8 19 8.1 17 5.2 20 8.1 17 6.8 17 6.2 20 8.1
11 17 5.7 14 5.8 19 7.7 16 5.0 17 5.4 14 6.6 17 5.9 17 6.7
12 16 5.4 14 6.0 18 7.5 16 5.2 16 5.1 13 6.7 16 5.4 15 6.1
13 15 5.3 13 6.3 18 7.4 14 5.4 15 4.9 12 6.9 15 5.2 14 5.7
14 14 4.9 12 6.1 16 5.8 13 4.5 14 4.5 11 7.0 14 4.9 13 5.6
15 14 4.3 12 6.2 14 4.6 13 4.7 13 3.9 11 7.1 14 4.6 12 5.3
16 14 4.4 12 5.8 13 4.2 10 6.9 12 5.2
17 13 4.2 12 5.7 12 4.0 10 7.0 12 4.0 12 5.1
18 13 4.0 11 5.7 12 4.0 12 3.5 12 5.2
19 13 3.9 12 3.8 12 3.8
20 13 3.8 12 3.7 12 4.0 11 4.9
21 13 3.7 11 5.2 12 3.6 12 3.4 11 3.4
22 13 3.5 12 3.6 11 3.3
23 12 3.5 11 3.5
24 12 3.5 11 4.9 12 3.3
25 12 3.1

Recent temperature and dissolved oxygen profile plots

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