Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
RANGELEY FRANKLIN 28 1 0.58 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
4 m
(12 ft) 		2 m
(7 ft) 		66 ha
(163 ac) 		1,399,202 m3
(1,134 ac-ft) 		1 km2
(0.4 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
1979 11 52 14 5.0 1.4 2.0 3.0 3 5 3.0 3.0 3.0
1980 1.6 2.1 2.5 4 2
1981 1.5 2.3 2.7 5 6
1982 15 50 18 1.3 2.1 2.9 2 1 2.3 5.5 8.6
1983 1.3 1.8 3.0 6 1
1984 13 28 0.9 1.2 1.7 7 1 3.1 6.2 14.7
1985 12 40 1.4 2.4 3.7 7 11 2.2 5.8 12.2
1989 14 2.6 2.7 2.9 3 2 2.0 4.0 5.9
1991 25 50 7.0 10 2.9 2.9 2.9 1 1
1998 16 48 13 2.8 2.9 2.9 1 2 3.2 3.2 3.2
1999 16 53 16 2.8 2.8 2.8 1 2.4 2.4 2.4
2000 16 50 13 2.7 2.8 2.8 3 2 2.4 3.6 4.8
2002 12.0 2.1 2.5 2.9 4 4
2003 13 8.0 2.5 2.7 2.7 5 9
2004 11.0 2.7 2.8 2.9 3 4
2005 4 16 58 7.7 11 2.9 2.9 2.9 1 1 4.2 4.2 4.2
2006 6 17 58 7.5 10 11.0 2.5 2.6 2.7 5 5 4.2 4.2 4.2
2007 11.0 2.1 2.6 2.8 4 3
2008 16.0 1.8 2.0 2.5 2
2009 10 8.0 2.5 2.8 2.9 5 6 4.9 5.2 5.4
2010 8 9.8 2.5 2.8 3.0 6 6 1.5 1.5 1.5
2011 20 12.0 1.0 1.6 2.6 6 1 15.0 15.0 15.0
2012 6 19 63 7.5 14.0 32 1.4 2.0 3.0 10 9.5 9.5 9.5
2013 12.0 2.0 2.7 3.0 7 8
2014 8.5 2.8 2.9 3.1 6 9
2015 10.1 2.2 2.6 2.8 5
2016 5 18 66 7.5 15 13.0 1.2 2.5 3.0 7 2 8.6 8.6 8.6
2017 9.2 2.8 2.9 3.0 7 12

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
5.2 16 54 7.3 14 11 32 0.9 2.5 3.7 4.5 1.5 5.5 15

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2016-08-01
2016-08-09
2016-08-17
2016-08-27
2016-09-18
2017-08-14
2017-08-28
2017-09-17
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 24 7.5 22 8.2 22 8.5 23 8.6 19 9.0 22 8.4 19 9.4 21 9.2
1 24 7.5 22 8.2 22 8.5 23 8.7 19 9.0 22 8.4 19 9.4 21 9.4
2 24 7.5 22 8.3 22 8.5 23 8.8 19 9.1 22 8.5 18 9.6 20 9.6

Recent temperature and dissolved oxygen profile plots

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