Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
WASHINGTON KNOX 13 1 0.9 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
7 m
(24 ft) 		4 m
(11 ft) 		40 ha
(99 ac) 		1,381,504 m3
(1,120 ac-ft) 		2 km2
(0.7 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
1997 5.8 6.9 8.5 10.5 3.9 5.0 6.1 2 3.3 4.2 5.2
1998 4.4 4.8 5.5 4
1999 4.5 6.7 7.0 9.5 6.4 6.8 7.2 2 3.4 3.6 3.9
2000 5.4 5.8 6.4 3
2003 4.8 6.6 8.5 9.0 6.5 7.2 7.8 2 1.5 2.2 2.9
2007 4.0 6.6 6.0 12.0 6.0 6.0 6.0 1 3.3 3.3 3.3
2008 15 3.2 39 6.6 8.0 9.0 6.4 6.4 6.5 1 3.8 3.8 3.8
2012 4.5 3.0 11.0 7.1 7.1 7.1 1 2.1 2.1 2.1
2015 11 4.0 46 6.4 4.0 5.6 6.4 7.0 4 2.3 2.3 2.3
2016 11 4.0 5 6.4 5.0 6.4 6.4 6.4 1 2 4.4 4.4 4.4

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
12 4.3 30 6.6 6.2 10 3.9 6.2 7.8 2.1 1.5 3.2 5.2

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1999-08-18
2003-08-22
2007-08-07
2008-08-25
2012-08-24
2015-08-20
2015-09-16
2016-08-25
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 23 9.0 26 9.2 25 7.6 23 8.5 25 8.0 26 7.7 23 8.0 24 8.0
1 23 8.9 26 9.2 24 7.6 23 8.4 25 8.0 26 7.7 23 8.1 24 8.0
2 23 8.9 26 9.3 24 7.6 23 8.4 24 7.9 26 7.7 22 8.1 24 8.0
3 22 8.8 26 9.2 24 7.5 22 8.6 24 7.8 25 8.0 22 8.1 24 8.1
4 22 8.7 24 8.2 22 6.8 22 8.0 24 7.0 24 7.9 22 8.0 24 7.9
5 21 6.7 18 3.9 17 1.8 19 3.7 19 1.7 21 6.6 22 7.7 23 6.8
6 17 0.5 15 1.7 13 0.4 15 1.0 15 0.4 17 4.2 20 3.0 20 0.5
7 14 0.3 13 1.7 12 0.0 12 0.4 13 0.2 14 0.1
8 12 0.8 11 0.3 12 0.0

Recent temperature and dissolved oxygen profile plots

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