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
1972 16 59 5.5
1992 5.6 6.1 7.4 3
1996 4.6 6.1 7.3 5
1997 6.7 7.4 8.3 6
1998 5.3 6.9 8.4 5
1999 6.3 7.7 9.6 6
2000 5.6 7.1 8.5 5
2001 5.5 8.2 10.5 3
2002 5.8 7.0 8.1 5
2003 2 5.3 7.4 10.1 7
2004 5 6.2 7.7 8.6 6
2005 5 5.4 7.1 9.4 4
2006 7.4 7.6 7.9 3
2007 5.3 7.3 9.8 4
2008 4
2009 6.3 7.5 8.8 2
2010 7.2 7.2 7.2 1
2013 5 5.5 5.5 5.5 1
2015 4.9 5.8 6.6 4
2016 7.0 8.4 9.2 6
2017 6.2 8.1 9.4 4

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
16 59 3.5 4.7 5.5 4.6 7.2 10 4.2 Inf 1

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1972-08-07
2003-08-02
2003-09-02
2004-08-02
2005-08-28
2015-08-10
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 23 9.7 25 9.6 24.9 9.8 25 9.5 21.2 10.2
1 20 8.8 23 9.7 25 9.6 24.9 9.6 25 9.5 20.9 10.3
2 23 9.7 24 9.0 24.1 9.4 24 9.1 20.5 10.5
3 20 11.0 22 9.6 24 9.0 24.1 8.2 24 9.1 20.4 9.2
4 20 8.0 22 9.6 24 8.2 24.0 8.1 24 9.0 20.3 8.5
5 22 9.6 23 8.0 21.9 8.0 23 8.7 20.3 8.1
6 20 9.1 23 8.0 21.9 8.0 22 8.3 20.2 7.5
7 19 9.1 23 8.0 21.6 8.0 22 8.2 20.1 6.8
8 18 8.9 22 7.6 20.8 7.8 22 7.9 19.7 6.5
9 17 8.9 22 7.5 20.7 7.4 21 7.9 19.5 6.2
10 16 8.7 20 7.2 20.5 7.4 21 7.2 19.3 5.8
11 14 6.3 18 7.0 18.9 7.2 17 7.0 18.6 5.4
12 14 6.4 18 7.0 18.8 7.0 16.1 5.4
13 13 6.4 16.5 6.7 14.4 5.4
14 13 6.8 16.0 6.7 12.8 5.4
15 12 6.9 16 3.5 14.1 5.7 16 4.2 12.0 5.4
16 16 2.9 11.2 5.3
17 16 2.6 10.8 5.3
18 15 2.6 15 3.9 10.5 5.2
19 10.3 5.0
20 11 5.7 12.7 3.8 11 3.0 10.0 4.8
21 12 2.6
22 11 4.9 11 2.6
23 11 2.6
24 11 4.3 10 2.5 9.7 4.5
25 10 2.5 10.8 2.7 10 2.0
26
27 9.5 1.6
28 9.4 4.5
29
30 9.1 3.9

Recent temperature and dissolved oxygen profile plots

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