Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
RANGELEY FRANKLIN 28 1 0.39 flushes/yr
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
1996 6.1 6.5 6.9 1
1997 5.8 7.3 8.4 3
1998 5.0 6.0 7.7 3
1999 7.0 8.0 8.4 2
2003 2 6.0 7.8 9.0 5
2004 6.0 5.0 7.3 8.8 6
2005 5 5.2 7.1 7.8 3
2006 4.0 5.5 6.4 8.1 5
2007 6.1 7.6 9.6 3
2008 15 7.1 38 7 4.5 5.2 5.9 6.3 3
2009 4.0 5.5 7.1 8.6 3
2010 3.0 7.6 8.1 8.8 1
2011 7.9 7.9 7.9 1
2012 4.0 5 7.9 7.9 7.9 1
2013 3.0 5.4 6.3 7.1 6
2014 5.9 7.8 9.6 3
2015 6.3 6.7 7.0 2
2016 7.1 8.3 9.2 6
2017 6.1 8.0 9.5 5

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 7.1 38 7 3.5 4.1 5 5 7.3 9.7 3.3 Inf 1

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2003-08-18
2004-09-02
2009-08-25
2012-08-13
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO
0 23.2 9.2 25.1 9.0 20 8.8 23.5 7.3
1 22.7 9.2 24.7 9.0 20 8.8 23.4 7.4
2 22.4 9.2 22.4 9.1 20 8.7 23.2 7.3
3 22.3 9.2 22.3 9.0 20 8.7 22.7 7.4
4 22.2 9.2 22.3 9.1 20 8.7 22.6 7.4
5 22.0 9.6 22.0 9.0 20 8.6 22.5 7.2
6 22.0 9.7 22.0 9.0 19 8.6 22.3 7.3
7 21.8 9.8 21.8 9.8 19 8.6 22.2 7.2
8 13.8 8.9 21.4 9.7 19 8.5 20.5 7.0
9 13.8 9.8 21.3 9.7 19 8.5 17.1 6.9
10 13.8 9.8 21.3 8.6 19 8.3 13.9 7.0
11 10.1 10.0 18.4 8.1 17 6.9 13.1 7.1
12 10.0 10.0 16.1 8.0 11.5 7.4
13 10.0 10.5 14.7 8.0 11.0 7.6
14 10.0 10.5 11.1 7.6 17 6.8 10.0 7.8
15 9.8 9.2 10.6 6.9 17 6.8 9.5 8.0
16 9.7 9.2 9.3 8.0
17 9.7 9.3 12 6.4 9.0 8.1
18 8.8 9.1 8.7 8.0
19 8.7 8.9 8.5 7.9
20 8.7 8.6 7.5 6.5 10 6.3 8.4 7.8
21 8.5 8.6 8.3 7.8
22 7.9 6.5 8.3 7.8
23 7.8 6.5 8.2 7.7
24 7.6 6.6 7.1 5.8 8.2 7.7
25 7.4 6.6
26 7.4 6.6 6.8 3.2
27 7.2 6.4 6.8 3.1
28 6.9 6.4
29 6.8 6.3
30 6.6 5.9

Recent temperature and dissolved oxygen profile plots

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