Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
DALLAS PLT FRANKLIN 28 1 7.9 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
7 m
(23 ft) 		2 m
(7 ft) 		69 ha
(170 ac) 		1,551,688 m3
(1,258 ac-ft) 		12 km2
(4.5 mi2)

Secchi Disk Transparency Graphs

Graph Legend: Secchi symbols = average Secchi Disk Transparency Values; tick marks = maximum and minimum values for each year.

## [1] "No 2017 Secchi Disk Transparency Data"

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
1970 13.1 2.7 2.9 3.0 3
1971 13.6 1.8 2.9 4.6 4
1972 17.9 63 52 0.9 2.5 4.0 4
1973 14.7 48 15.0 21 2.7 3.1 3.4 3
1974 14.3 44 28.8 0.9 2.1 2.9 6 5.4 12.9 31.8
1975 14.3 49 21.4 0.7 2.2 3.0 6 5.3 14.4 38.5
1976 13.1 67 14 2.3 3.1 4.0 5 3.4 3.9 4.2
1977 15.0 71 13 10 2.0 3.5 4.1 5 3.3 5.8 8.1
1978 16.1 66 22 2.1 3.2 4.0 5 3.5 5.4 7.4
1979 15.5 74 21 25 2.6 2.6 2.6 1 11.6 11.6 11.6
1980 11.5 56 27 21 1.8 2.0 2.2 4 8.6 10.7 12.9
1981 14.1 66 23 25 1.1 2.1 3.6 6 7.6 9.6 12.1
1982 14.0 74 16 21 2.1 2.5 3.3 5 4.0 7.6 9.9
1983 33 1.9 1.9 1.9 1 8.3 8.3 8.3
1989 18 22 22 2.0 2.4 2.9 4 3.5 7.3 12.6
1990 11 15 2.1 2.9 4.2 5 4.2 7.6 14.1
1991 25.0 84 7.0 16 16 2.2 2.5 3.0 3 5.1 7.2 10.9
1992 15 2.5 2.5 2.5 1
1997 13.0 64 7.4 11 2.7 2.9 3.0 1 5.1 5.1 5.1
1998 8.1 66 15 16 3.1 3.6 4.0 2 4.2 4.2 4.3
1999 13.8 65 14 17 2.9 3.3 3.5 4 3.7 4.8 6.0
2000 14.0 64 15 3.2 3.7 4.6 3 3.0 4.2 4.9
2001 11.5 73 7.4 10 12 3.2 3.9 4.5 3 3.3 4.1 4.8
2002 15.0 71 14 9.0 16 3.8 4.2 5.1 7 3.0 6.3 12.1
2003 14 13.2 86 9 8.0 3.6 4.1 4.4 4 8.7 8.7 8.7
2004 9.5 3.3 3.4 3.5 4
2005 17 12.9 81 7.3 7 16 2.8 3.4 4.1 4 5.2 5.2 5.2
2006 21 13.4 85 7.3 10 3.1 3.5 4.0 2 5.3 5.3 5.4
2007 10.0 2.8 3.5 4.1 3
2010 10 3.0 3.9 4.7 2 6.8 6.8 6.8
2012 8.0 70 2.4 3.4 4.4 2
2013 7.0 3.7 3.9 4.0 2 2
2014 2.8 3.4 4.6 6
2015 16 15.0 73 7.5 6 3.0 3.6 5.0 5 6.0 6.0 6.0

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
17 14 68 7.3 14 13 26 21 0.7 3.1 5.1 3.7 3 7.2 38

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2005-08-15
2006-08-28
2007-08-27
2010-08-10
2012-08-08
2012-08-23
2013-08-28
2015-08-20
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25 8.0 18 8.0 22 8.2 22 8.5 24 7.0 22 7.9 23 8.0 25 8.5
1 24 8.0 18 8.0 22 8.2 22 8.6 24 7.0 22 7.9 22 8.1 25 8.5
2 24 7.9 18 8.0 22 8.2 22 8.6 24 7.0 22 7.8 22 7.9 25 8.5
3 23 7.8 17 8.0 20 8.1 22 8.6 24 6.8 22 7.8 21 7.6 23 8.2
4 22 5.4 17 8.1 19 8.0 22 8.5 21 3.7 22 6.3 21 6.2 21 5.9
5 16 0.6 16 7.9 18 4.6 21 6.6 16 0.6 18 0.7 20 2.6
6 13 0.5 16 8.1 18 1.2 20 3.6 14 0.3 15 0.5 18 0.4
7 12 0.4

Recent temperature and dissolved oxygen profile plots

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