Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
DALLAS PLT FRANKLIN 28 1 1.17 flushes/yr 1590 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
12 m
(40 ft) 		5 m
(16 ft) 		117 ha
(289 ac) 		5,625,672 m3
(4,561 ac-ft) 		11 km2
(4.2 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 25.5 41 7.0 7 3.7 3.7 3.7 1 3.0 3.0 3.0
2001 9.5 43 7.3 10 6.0 5.4 5.4 5.4 1 2.3 2.3 2.3
2002 4.8 5.0 5.3 2
2003 4.7 5.2 5.4 4
2004 3.7 4.2 4.4 2
2005 17 10.8 47 7.3 5 11.0 5.8 5.9 6.0 1 3.5 3.5 3.5
2006 18 11.6 46 7.3 6 8.5 4.3 4.3 4.3 1 2.8 2.8 2.8
2007 5.2 5.6 6.2 4
2009 4.6 4.6 4.6 1
2011 4.6 4.9 5.2 3
2012 24 13.5 48 7.1 7 10 9.0 4.8 4.9 5.0 3
2013 4.8 5.5 5.9 2
2014 5.1 5.2 5.3 2
2015 5.1 5.2 5.2 2
2016 4.9 5.4 6.3 3
2017 4.5 4.8 5.1 3
2018 18 14.5 56 7.5 9 4.5 4.8 5.1 2 3.0 3.0 3.0

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
19 14 47 7.2 7.3 10 8.6 3.7 5 6.3 2.2 2.3 2.9 3.5

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2002-08-09
2005-08-15
2006-08-23
2012-08-03
2012-09-13
2013-08-28
2018-08-14
2018-09-05
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 22 7.5 24.0 8.1 20 8.7 25 7.4 21 7.7 24 8.6 24.4 8.2 23 7.9
1 22 7.5 23.2 8.1 20 8.8 24 7.3 20 7.8 22 8.6 24.4 8.2 23 7.9
2 21 7.5 23.1 8.0 20 8.8 25 7.2 19 7.8 22 8.4 24.3 8.1 22 7.9
3 21 7.5 23.0 8.0 20 8.8 23 7.2 19 7.8 21 8.4 24.1 8.1 22 7.9
4 21 7.5 22.8 7.8 20 8.8 22 6.8 19 7.8 21 8.3 23.6 7.8 22 7.9
5 21 7.2 17.4 7.5 20 8.8 22 6.5 19 7.7 19 7.0 21.7 6.1 22 7.9
6 16 2.1 12.9 5.3 18 4.6 17 4.7 18 7.3 17 5.1 17.3 2.8 22 7.6
7 13 1.0 11.0 3.8 15 0.4 13 1.4 15 0.3 13.3 1.4 19 1.2
8 12 0.1 10.2 3.0 13 0.4 12 0.4 12 0.2 11.8 1.0 18 2.9
9 12 0.3 9.8 2.4 11 0.2 11 0.3 12 0.1 10.8 0.4 18 1.2
10 11 0.1 9.7 2.5 11 0.2 11 0.3 10.3 0.2
11 9.9 1.6 10 0.3 10.0 0.1
12 9.6 0.8 10 0.3 9.9 0.1

Most recent temperature and dissolved oxygen profile plots

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