Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
MARIAVILLE HANCOCK 24 1 0.38 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
20 m
(65 ft) 		7 m
(22 ft) 		179 ha
(442 ac) 		12,200,000 m3
(9,891 ac-ft) 		6 km2
(2.4 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
1974 4.7 5.0 7.2 9.1 6 1.8 2.4 3.4
1975 4.0 21 6.2 6.2 7.4 8.9 7 1.2 1.7 2.3
1976 4.3 22 7.3 4 4.0 7.6 9.5 8 0.7 1.7 2.9
1977 5 7.5 7.5 7.5 1
1999 6.8 8.6 9.6 6
2000 5.5 23 7.0 7.7 7.2 8.0 8.6 6 1.7 2.0 2.3
2001 20 6.6 8.5 8.8 9.6 6
2002 7.8 8.3 8.9 10
2003 6.6 8.0 8.7 5
2004 6.9 4.0 8.2 8.2 8.2 1 2.5 2.5 2.5
2006 9 3.5 21 6.7 3.0 7.5 7.5 7.5 1 2.4 2.4 2.4
2015 4.0 7 6.0 7.6 9.3 2 3.4 3.4 3.4
2017 7 6.0 55 7.1 4.0 9.9 9.9 9.9 1 4.1 4.1 4.1

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
8 4.7 27 6.8 4.9 5.4 5.3 7.7 4 8.1 9.9 4.6 0.7 2.5 4.1

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1975-09-24
2000-08-30
2004-08-17
2006-08-22
2015-08-26
2017-08-16
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 16.1 10.8 22 8.8 21.7 8.6 21.7 8.9 23.6 8.1 22.9 8.6
1 16.1 10.9 24 8.9 21.7 8.6 21.7 8.9 23.7 8.1 22.9 8.5
2 16.1 10.8 24 8.9 21.8 8.6 21.6 8.9 23.8 8.0 22.9 8.5
3 16.1 10.7 24 8.9 21.7 8.5 21.6 8.9 23.9 8.0 22.9 8.5
4 16.1 10.7 24 8.9 21.7 8.6 21.6 8.9 23.9 7.9 22.9 8.5
5 16.1 10.7 24 8.9 21.8 8.6 21.5 8.9 23.9 7.9 22.8 8.5
6 16.1 10.7 24 8.9 21.7 8.6 21.4 8.8 23.2 8.0 22.8 8.5
7 16.1 10.5 24 9.0 21.7 8.6 19.3 7.8 22.0 8.1 22.8 8.4
8 16.0 10.5 23 8.7 17.0 8.3 15.0 7.2 19.0 8.7 17.9 9.6
9 16.0 10.4 19 6.9 14.9 8.2 12.7 5.8 15.5 8.7 14.2 8.6
10 15.9 10.2 16 6.1 12.5 7.2 11.4 5.4 13.2 8.5 12.4 8.1
11 13.0 9.2 15 5.2 11.0 6.7 10.6 5.2 10.8 8.3 10.8 7.5
12 9.9 7.7 14 5.5 10.0 6.3 10.0 5.2 10.1 8.4 9.9 7.2
13 9.0 7.8 12 5.3 9.0 6.2 9.7 5.1 9.0 8.0 9.3 7.0
14 8.9 6.3 13 5.2 8.5 6.4 9.5 5.1 8.2 7.6 8.9 6.8
15 8.0 5.4 12 5.1 8.0 5.9 9.2 5.1 7.9 7.2 8.5 6.4
16 7.7 4.5 12 4.3 7.8 5.4 8.8 4.3
17 7.4 3.5 12 3.6 7.5 5.4 8.7 3.5 7.7 6.2 8.1 5.6
18 7.2 3.0 12 3.2 7.4 4.6 8.7 3.0 7.5 6.0
19 7.2 2.5 12 2.9 7.2 4.2 8.6 2.0 7.8 4.1

Recent temperature and dissolved oxygen profile plots

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