Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
DALLAS PLT FRANKLIN 28 1 0.34 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
15 m
(50 ft)
6 m
(18 ft)
68 ha
(168 ac)
3,810,241 m3
(3,089 ac-ft)
2 km2
(0.8 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
1975 17.9 5.30 5.6 5.9 4
1976 15.5 8.0 8.0 9.5 4.40 5.3 6.2 6 3.5 4.8 6.0
1977 16.0 14.0 4.40 5.2 6.2 5
1978 4.40 5.1 5.5 4
1979 5 4.70 5.5 6.7 5
1980 4.40 5.0 5.9 5
1981 10.0 12.0 4.60 5.2 6.1 5 1.9 1.9 1.9
1982 4.60 5.2 5.5 6
1983 4.90 5.2 5.8 3
1984 4.30 5.0 5.5 5
1985 8.0 29 5.0 11.0 5.00 5.0 5.0 1 4.2 4.2 4.2
1991 15.8 32 7.2 7.5 5.40 5.4 5.5 2 3.6 3.6 3.6
1992 20.4 7.2 5.00 5.2 5.2 2
2002 4 5.02 5.5 5.9 5
2003 9 12.2 39 4.0 6.10 6.7 7.2 4 1.8 1.8 1.8
2004 5 5.25 5.7 6.5 4
2005 11 10.0 38 7.3 6.0 8.0 5.65 6.0 6.7 4 2.8 2.8 2.8
2006 12 10.0 37 7.2 4.0 4 7.5 5.10 5.9 6.6 5 2.4 2.4 2.4
2007 6.05 6.3 6.6 3
2008 5.37 5.8 6.6 5
2009 5.76 6.4 7.4 5
2010 6.40 6.7 7.0 4
2011 12 10.5 35 7.4 4 5.68 6.5 7.0 7
2012 4.49 5.5 6.8 3
2013 4 4.96 6.1 7.2 7
2014 5.72 6.3 7.0 4
2015 11 5.85 6.4 7.2 7
2016 32 9.5 34 7.2 11.0 13.0 0.25 5.1 8.0 4 2.8 3.2 3.6
2017 5.75 6.3 6.9 7

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
15 13 35 7.2 6.5 5.3 10 9.5 0.2 5.7 8 4.5 1.8 3.1 6

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2015-09-26
2016-08-05
2016-08-09
2016-08-21
2016-08-25
2017-08-02
2017-09-02
2017-09-15
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 18.3 7.8 23.8 8.8 22.7 8.3 22.3 9.0 21 8.4 23.5 8.3 17.6 8.6 19.6 9.2
1 18.2 7.8 23.9 8.8 22.4 8.3 22.3 8.9 21 8.4 23.4 8.3 17.5 8.7 18.5 9.3
2 18.2 7.8 23.9 8.8 22.2 8.3 22.3 8.9 21 8.4 22.7 8.3 17.4 8.7 18.0 9.4
3 18.1 7.8 23.9 8.8 22.1 8.2 22.4 8.9 21 8.5 22.5 8.2 17.4 8.7 17.7 9.4
4 18.1 7.8 23.8 8.8 22.1 8.2 22.3 8.9 21 8.4 22.1 8.3 17.3 8.6 17.5 9.4
5 18.1 7.9 23.6 8.8 21.9 8.2 22.3 8.9 20 8.2 21.0 8.1 17.3 8.7 17.3 9.4
6 18.0 7.8 21.8 8.8 21.5 8.1 22.3 8.9 20 8.0 18.9 8.1 17.2 8.7 17.0 9.3
7 17.9 7.6 18.0 10.1 16.9 9.2 20.8 8.9 20 7.9 13.9 8.3 17.2 8.7 16.5 8.7
8 17.6 7.2 13.9 8.4 13.8 7.4 15.4 9.8 20 7.9 11.0 6.1 13.8 5.2 15.0 5.7
9 12.8 1.0 12.1 6.6 11.8 4.5 13.2 6.4 20 7.0 9.9 4.7 10.4 2.2 11.9 1.4
10 10.2 0.3 11.1 3.7 10.8 2.2 11.5 2.9 9.1 3.5 9.5 0.8 10.3 0.3
11 8.9 0.3 10.1 1.2 10.2 0.9 10.5 0.6 8.7 2.5 9.1 0.5 8.8 0.1
12 8.5 0.2 9.6 0.5 9.7 0.2 9.8 0.2 8.2 1.5 8.4 0.0 8.2 0.0
13 8.2 0.2 9.4 0.2 9.4 0.1 9.5 0.2 7.9 0.7 8.2 0.0 8.1 0.0
14 8.1 0.2 9.3 0.1 9.3 0.1 9.4 0.2 7.9 0.2 8.1 0.0 8.1 0.0
15 8.1 0.2 9.3 0.1 9.3 0.2 7.9 0.0 8.0 0.0 8.1 0.0
16 9.4 0.1 9.3 0.1 8.0 0.0 8.1 0.0
17 9.4 0.1 9.3 0.1

Recent temperature and dissolved oxygen profile plots

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