Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
FRENCHTOWN TWP PISCATAQUIS 41 1 0.5 flushes/yr 1226 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
38 m
(123 ft) 		17 m
(55 ft) 		1,288 ha
(3,184 ac) 		217,596,560 m3
(176,408 ac-ft) 		75 km2
(29 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 2018 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
1981 5.6 5.6 5.6 1
1989 6.2 21 4 7.2 7.2 7.2 1 2.0 2.0 2.0
2006 21 6.0 21 7 7 5.3 5.3 5.4 1 2.6 2.6 2.6
2009 6.4 7.1 8.1 5
2010 6 5.6 6.4 7.3 5 3.0 3.0 3.0
2011 6.2 6.4 6.6 3

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
21 6.1 21 7 5.7 5.3 6.4 8.1 2.7 2 2.5 3

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2006-08-30
2010-09-01
Depth (m) TEMP DO TEMP DO
0 18.5 9.3 20.5 9.2
1 18.5 9.3 20.4 9.2
2 18.5 9.3 20.4 9.2
3 18.5 9.3 20.2 9.2
4 18.4 9.3 20.1 9.1
5 18.4 9.2 20.1 9.1
6 18.4 9.3 20.1 9.1
7 18.3 9.3 20.0 9.1
8 18.2 9.2 20.0 9.0
9 16.1 8.0 20.0 9.1
10 13.1 7.6 19.9 9.1
11 11.6 7.8 19.6 9.0
12 11.0 7.8 18.2 8.5
13 10.3 7.8 16.1 8.0
14 9.7 7.9 12.8 7.9
15 9.2 8.0 10.6 8.6
16 9.1 7.9 10.5 8.7
17 9.0 7.8 10.0 8.7
18 8.8 7.5 9.4 8.9
19 8.8 7.5 8.9 8.9
20 8.7 8.8
21 8.5 9.0
22 8.4 8.6
23 8.3 8.7
24 8.2 8.7
25 8.0 8.5
26 7.9 8.1
27
28
29
30 7.8 7.2

Most recent temperature and dissolved oxygen profile plots

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