Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
RANGELEY FRANKLIN 28 1 0.39 flushes/yr 1518 ft
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 14 85 7.9
1992 4.2 5.5 6.5 3
1996 4.2 4.8 5.3 5 4
1997 4.5 5.3 5.6 6 9
1998 4.6 5.2 5.7 5 4
1999 3.2 5.0 5.6 6 5
2000 4.4 5.0 5.3 5 5
2001 4.6 5.2 5.4 4 7
2002 5.0 5.3 5.4 5 9
2003 5.2 5.4 5.7 6 8
2004 4.6 5.2 5.5 5 9
2005 5 4.6 5.2 5.7 4 1
2006 5.5 4.8 5.2 5.8 4 5
2007 5.1 5.4 5.6 2 2
2008 4.0
2009 4.0 5.0 5.9 7.8 3 1
2010 5.2 5.5 5.8 1 1
2015 4.7 5.2 5.9 4 1
2016 4.3 4.7 5.1 6 10
2017 4.8 4.9 5.2 4 5
2018 4.3 5.2 5.2 1 10

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
14 85 5 4.5 7.9 3.2 5.2 7.8 4.2 Inf 1

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1972-08-07
Depth (m) TEMP DO
1 20 9.0
2
3 20 8.8
4 20 8.8

Most recent temperature and dissolved oxygen profile plots

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