Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
PRENTISS TWP SOMERSET 47 1 9.63 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
6 m
(20 ft) 		2 m
(6 ft) 		4 ha
(10 ac) 		74,850 m3
(61 ac-ft) 		1 km2
(0.4 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
2009 9.8 26 6.2 15 3.7 4.2 4.8 4 1.6 2.3 3.5
2010 60 9.8 24 5.6 16 3.5 4.1 5.2 3 1.6 1.9 2.5
2011 48 8.0 21 12 4.2 4.2 4.2 1 3.9 3.9 3.9
2012 46 10.0 20 7.0 10 4.2 4.6 5.0 2 2 1.3 1.9 2.5
2013 54 10.0 30 7.2 18 3.6 4.2 4.6 2 1.5 1.5 1.5
2014 46 11.8 27 14 3.9 4.0 4.2 2 2.0 2.3 2.6
2015 50 12.2 29 7.1 12 4.0 4.1 4.1 2 3.2 3.5 3.8
2016 40 12.5 31 12 4.6 4.7 4.8 2 2 1.6 2.1 2.6

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
49 10 26 6.2 14 3.5 4.2 5.2 2.2 1.3 2.4 3.9

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2009-09-02
2009-09-22
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 18 9.7 15 8.8 18 7.0 15 9.5 16 9.0 13 8.5
1 18 9.8 15 8.8 18 7.1 14 9.5 15 9.1 13 8.6
2 18 9.8 13 9.1 18 6.9 12 9.5 14 8.7 12 8.3
3 15 8.9 12 9.0 17 3.6 11 9.1 12 8.7 12 7.9
4 14 5.6 12 8.9 14 0.1 11 9.1 11 7.6 12 7.8
5 12 0.9 12 7.9 11 0.0 11 8.0

Recent temperature and dissolved oxygen profile plots

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