Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
PRENTISS TWP SOMERSET 47 1 2.4 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
16 m
(52 ft) 		4 m
(14 ft) 		59 ha
(146 ac) 		2,570,230 m3
(2,084 ac-ft) 		6 km2
(2.2 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
2004 5.6 5.6 5.6 1
2009 9.0 24 6.4 8.2 3.9 4.4 5.1 4 2.6 4.0 6.2
2010 28 8.6 23 5.2 9.2 3.3 4.0 5.0 4 2.1 5.8 8.9
2011 34 7.5 20 14.0 3.2 3.2 3.2
2012 20 10.0 17 7.1 6.0 4.6 4.6 4.6 1 4.2 4.2 4.2
2013 31 8.5 26 7.2 7.0 4.2 4.6 5.0 2 3.3 3.4 3.6
2014 27 10.0 23 9.0 4.0 4.4 4.8 2 2.7 5.3 8.0
2015 22 9.8 20 7.2 5.5 4.5 4.6 4.8 2 7.2 8.1 8.9
2016 19 10.0 24 12.0 4.4 4.8 5.2 2 3.2 4.0 4.8

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
26 9.2 22 5.8 8.9 3.3 4.6 5.6 2.2 2.1 4.8 8.9

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2009-09-02
2009-09-23
2010-08-26
2013-09-29
2014-09-30
2016-09-29
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 17.7 9.8 15.1 9.7 19.1 8.5 14.3 9.6 14.8 9.6 14.5 9.0
1 17.7 9.8 15.1 9.7 19.1 8.5 14.0 9.6 14.8 9.6 14.5 9.0
2 17.7 9.8 15.1 9.7 19.1 8.4 13.7 9.5 14.8 9.5 14.5 9.0
3 17.6 9.8 14.8 9.6 19.1 8.4 13.1 9.3 14.7 9.5 14.5 9.0
4 17.5 9.8 14.1 9.5 19.1 8.4 12.9 9.2 14.3 9.2 14.5 8.9
5 17.4 9.6 13.8 9.3 18.5 6.8 12.8 9.1 13.0 8.8 14.5 8.8
6 16.8 8.3 13.8 9.2 16.5 1.5 12.7 9.0 12.6 8.7 14.5 8.7
7 13.5 2.2 13.7 9.2 12.3 2.5 12.6 8.8 12.0 7.9 14.3 8.5
8 11.8 2.6 13.5 9.0 9.5 3.6 12.4 8.5 9.9 4.7 12.6 3.8
9 10.3 2.4 12.5 5.3 8.2 2.8 9.9 1.4 7.6 2.0 9.1 0.8
10 9.3 1.7 9.5 0.9 7.7 2.4 7.6 0.3 6.8 1.5 8.3 0.2
11 8.8 1.4 8.7 0.8 7.4 1.8 7.2 0.3 6.4 1.1 8.0 0.2
12 8.5 1.1 8.4 0.8 7.3 1.5 7.0 0.3 6.2 0.5 7.7 0.1
13 8.3 0.9 8.3 0.8 7.2 1.2 6.9 0.2 6.1 0.1 7.6 0.1
14 8.1 0.7 8.1 0.8 7.2 0.8 6.7 0.2 6.1 0.1 7.5 0.1
15 8.1 0.7 8.0 0.8 7.1 0.2 6.7 0.2 6.1 0.1 7.5 0.1
16 8.0 0.7 8.0 0.8 7.0 0.0 6.6 0.2 6.0 0.0 7.5 0.1
17 7.9 0.7

Recent temperature and dissolved oxygen profile plots

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