Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
RANGELEY FRANKLIN 28 1 7.66 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
15 m
(50 ft) 		6 m
(20 ft) 		52 ha
(128 ac) 		3,103,381 m3
(2,516 ac-ft) 		40 km2
(16 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 18 41 7.0 8.5 3.4 4.0 4.6 2 1.5 1.8 2.0
1997 17 45 7.4 5.0 4.8 5.0 5.3 1 1.8 1.8 1.8
1999 16 46 7.5 7.5 3.3 4.0 4.7 4 2.8 3.0 3.2
2000 14 43 6.0 6.0 4.5 4.9 5.2 3 2.5 3.0 3.7
2001 11 44 7.4 6.7 4.9 5.0 5.1 3 2.3 2.5 2.7
2002 44 17 46 4.0 6 2.6 4.2 6.0 6 3.0 3.0 3.0
2003 26 18 49 5.7 4.0 4.3 4.7 5 6.4 6.4 6.4
2004 7 3.9 4.3 4.9 4 1
2005 35 16 49 7.3 7.0 4.0 4.4 5.2 5 3.3 3.3 3.3
2006 46 16 47 7.3 8.0 4.0 4.8 5.6 6 3.1 3.1 3.1
2008 6 4.7 4.8 4.8 1
2012 7 24.0 3.4 4.0 4.4 2
2013 37 17 45 7.5 8.0 4.1 4.5 4.9 2 2.7 2.7 2.7
2014 3.3 3.6 3.8 4
2015 2.9 4.2 6.2 5
2016 4.3 4.8 5.8 5
2017 4.4 4.7 5.0 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
38 16 46 7.3 6.6 6.5 12 2.6 4.4 6.2 3.7 1.5 3.1 6.4

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2005-08-06
2005-08-16
2006-08-06
2006-08-23
2012-08-08
2012-08-23
2013-08-21
2013-08-26
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 22.3 7.6 23.1 8.2 22.6 7.8 19.2 8.6 23.6 7.2 21.9 7.8 21.2 8.5 20.9 8.5
1 22.3 7.6 22.9 8.1 22.6 7.7 19.2 8.6 23.5 7.1 21.0 7.9 20.9 8.5 20.9 8.4
2 22.0 7.6 22.6 8.1 22.3 7.6 19.2 8.6 23.4 7.0 20.9 7.8 20.5 8.4 20.8 8.3
3 20.9 7.2 21.9 7.8 22.1 7.6 19.2 8.6 21.3 6.8 19.9 6.5 20.2 8.2 20.6 8.1
4 16.8 7.4 16.3 7.5 19.4 7.0 19.1 8.6 15.7 4.2 17.1 3.2 18.9 8.1 18.6 7.7
5 12.0 7.5 11.8 7.3 13.6 5.6 15.1 5.2 11.7 4.3 12.7 3.2 13.9 4.6 15.5 5.8
6 10.1 7.3 9.7 7.1 10.9 5.6 11.3 4.7 10.6 4.5 10.9 3.8 9.4 4.9 9.8 4.8
7 8.6 6.5 8.6 6.5 9.6 5.4 9.2 4.7 9.9 4.6 9.9 4.0 8.0 4.3 8.6 4.4
8 8.1 5.8 8.3 6.2 8.7 5.3 8.6 4.3 9.0 4.6 9.0 3.8 7.4 4.1 7.8 4.2
9 8.0 5.7 8.2 6.0 8.3 5.0 8.4 4.1 8.4 4.2 8.4 3.5 7.1 4.0 7.4 3.7
10 7.7 5.2 8.0 5.4 8.1 4.4 8.2 3.8 8.3 3.6 8.3 2.9 7.0 3.8 7.2 3.5
11 7.7 5.0 7.9 4.9 8.1 4.2 8.1 3.4 8.1 3.3 6.9 3.5 7.1 3.1
12 7.9 4.8 7.9 3.9 8.0 3.3 8.1 3.2 6.8 3.2 7.0 2.9
13 7.9 4.6 7.8 3.4 7.9 3.1 8.1 3.2 6.9 0.6 6.9 2.8
14 7.8 4.3 7.8 3.2 7.9 2.9 6.9 2.6
15 7.8 2.0 6.5 2.5

Recent temperature and dissolved oxygen profile plots

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