Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
RANGELEY FRANKLIN 28 1 5.13 flushes/yr 1521 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
16 m
(51 ft) 		6 m
(21 ft) 		83 ha
(205 ac) 		5,414,371 m3
(4,390 ac-ft) 		6 km2
(2.3 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
1991 23 43 7.0 6.0 2.5 2.5 2.5
1997 15 42 7.4 6.0
1999 14 8.0 3.8 4.0 4.1 1 3.5 3.5 3.5
2000 12 40 7.0 4.6 4.6 4.6 1 1.8 2.0 2.2
2001 6.0 4.4 5.4 6.3 5 2.9 2.9 2.9
2002 5.5 4.2 4.9 5.8 4
2003 5.0 4.7 5.6 6.3 4
2004 5.0 4.8 5.2 5.6 3
2005 32 13 49 7.3 5.0 4.0 4.9 5.5 6.0 4 3.0 3.0 3.0
2006 28 15 50 7.4 4.0 4.0 4.3 5.5 6.6 3 1.9 1.9 1.9
2008 9.0 5.7 5.8 5.9 1
2009 5.0 4.9 5.2 5.4 3
2010 6.0 10 5.0 5.1 5.6 3 2.6 2.6 2.6
2011 5.0 5.1 5.3 5.4 1
2012 4.5 6 4.4 5.2 5.9 2
2013 5.0 3.8 4.2 4.5 2
2014 3.6 4.3 5.0 6
2015 24 16 49 7.2 8.5 3.4 5.0 6.5 5 6.7 6.7 6.7
2016 4.0 5.0 5.9 5
2017 4.7 4.9 5.2 5
2018 4.7 5.3 5.6 2

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
28 16 46 7.2 6.2 5.2 8 3.4 5.1 6.6 3.2 1.8 3.1 6.7

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2005-08-16
2006-08-05
2006-08-23
2010-08-10
2011-08-26
2012-08-22
2013-08-26
2015-08-20
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 24.0 8.1 24.9 7.6 20.5 8.9 22.8 8.5 20.7 7.6 22.5 7.8 21.0 8.3 24.0 8.4
1 23.9 8.1 24.9 7.5 20.5 8.9 22.4 8.6 20.7 7.6 22.2 7.3 21.0 8.2 23.6 8.4
2 23.8 8.1 24.8 7.5 20.5 8.9 22.0 8.6 20.6 7.6 22.0 7.3 21.0 8.2 21.7 8.2
3 23.0 8.1 24.8 7.5 20.5 8.8 21.5 8.6 20.4 7.6 22.0 7.2 20.8 8.1 20.8 7.7
4 20.4 7.8 23.8 7.4 19.9 8.6 21.3 8.6 20.4 7.5 21.3 7.3 19.3 8.0 19.6 6.8
5 14.0 7.7 16.8 7.4 18.6 8.8 20.5 7.8 20.2 7.4 17.6 5.7 17.1 6.8 17.6 5.5
6 10.5 6.9 15.3 6.8 13.9 5.9 15.7 5.4 14.3 4.0 12.6 4.0 12.6 6.4 12.3 4.6
7 9.2 6.3 10.0 6.5 9.1 5.6 12.9 5.4 11.2 4.1 10.7 3.1 9.5 4.5 10.4 4.6
8 8.8 6.5 9.1 6.4 8.5 5.2 11.8 4.9 9.8 4.1 9.9 2.8 9.0 4.2 9.6 4.4
9 8.8 5.5 8.5 6.0 8.2 5.0 11.3 4.6 9.3 4.0 9.6 2.5 8.8 4.0 8.9 4.1
10 8.6 5.7 8.3 5.7 8.0 4.8 10.9 4.4 9.1 3.7 9.4 2.2 8.6 3.4 8.6 3.9
11 8.5 5.6 8.1 5.5 7.8 4.8 10.4 3.8 8.9 3.7 9.3 1.9 8.3 3.6 7.8 2.9
12 8.5 5.5 7.9 5.5 7.4 3.3 9.6 1.6 8.2 3.2 9.2 1.6 7.8 3.1 7.6 2.2
13 8.4 5.0 7.5 5.0 7.1 2.1 9.3 1.0 7.4 1.6
14 8.4 0.9 7.2 4.0 7.0 0.6 9.1 0.6 7.2 0.8
15 7.1 3.0

Most recent temperature and dissolved oxygen profile plots

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