Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
MARIAVILLE HANCOCK 24 1 4.06 flushes/yr 102 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
14 m
(47 ft)
4 m
(12 ft)
3,420 ha
(8,450 ac)
130,258,582 m3
(105,602 ac-ft)
126 km2
(49 mi2)

Secchi Disk Transparency Graphs

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

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
1973 20 0.90 1.0 1.2 2
1977 27 0.60 1.2 1.5 3
1978 34
1979 15
1998 9.9 31 17 0.79 1.1 1.9 3 4.5 4.5 4.5
1999 0.40 1.5 2.2 5
2000 1.40 1.8 2.6 5
2001 1.30 1.8 2.0 5
2002 1.28 1.6 2.2 3
2003 51 8.0 32 14 0.65 1.6 2.9 5 3.4 4.5 5.6
2004 1.30 1.7 2.0 5
2007 40 6.8 31 7.0 14 2.35 2.6 2.8 2
2008 1.70 2.1 2.6 3
2013 0.95 2.1 3.0 6
2014 0.83 2.1 2.3 3
2015 2.01 2.4 2.8 4
2016 57 8.0 32 6.9 21 2.00 2.0 2.0 1 3.3 3.3 3.3
2017 1.88 2.2 2.6 5
2018 1.15 1.5 1.8 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
49 8.2 32 6.9 17 14 24 34 0.4 1.8 3 3.8 3.3 4.1 5.6

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1998-08-28
2003-08-14
2016-08-15
Depth (m) TEMP DO TEMP DO TEMP DO
0 25 8.0 24 7.7 24 8.4
1 24 7.9 24 7.6 24 8.4
2 24 7.8 23 7.5 24 8.3
3 23 7.1 23 7.6 23 7.8
4 23 7.0 23 7.6 23 7.7
5 23 6.9 23 7.4 23 7.6
6 23 6.9 23 6.9 23 7.6
7 23 6.8 23 6.6 23 7.6
8 22 6.7 23 6.5 23 7.5
9 22 6.6 22 6.3 23 7.4
10 22 6.6 22 6.2 23 7.2
11 22 6.6 22 5.7

Most recent temperature and dissolved oxygen profile plots

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