Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
RICHARDSONTOWN TWP OXFORD 18 1 4.02 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
25 m
(83 ft) 		10 m
(33 ft) 		1,823 ha
(4,505 ac) 		181,438,154 m3
(147,094 ac-ft) 		95 km2
(37 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
1981 4.5 5.3 6.0 6
1982 6.0 34 18 4.0 5.5 6.1 6.8 6 3.3 3.3 3.3
1983 5.5 6.1 6.8 6
1984 5.2 6.1 7.0 6
1985 5.0 5.7 6.5 6
1986 7.0 20 5 5.5 5.4 5.8 6.1 6
1987 4.8 5.4 5.7 6
1988 5.3 5.8 6.1 5
1990 5.0 5.7 7.1 5
1991 14.0 32 7.0 5 5.5 5.5 5.5 1
2001 6.2 27 4 5.4 5.4 5.4 1 5.0 5.0 5.0
2002 7 6.0 6.0 6.0 1
2003 5 6.9 7.0 7.0 1
2004 6 5.5 5.7 5.9 4
2005 6 4.3 5.0 6.2 3
2006 18 5.7 26 6.9 6 5 5.1 5.1 5.1 1 5.3 5.3 5.3
2008 12 4.2 4.6 5.2 3
2009 4 6.2 6.4 6.7 2
2010 5.1 5.1 5.2 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
18 7.8 28 7 7.2 6.6 4.8 4.2 5.7 7.1 3.8 3.3 4.5 5.3

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1982-08-19
1986-08-14
1991-08-22
2001-08-14
2006-08-22
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 20 8.8 20 9.3 20 8.9 24 8.4 20 7.7
1 20 8.8 24 8.3 20 7.6
2 20 8.9 21 9.3 20 8.8 23 8.4 20 7.6
3 20 8.8 23 8.5 20 7.6
4 20 8.9 20 9.2 19 8.8 23 8.5 20 7.6
5 19 8.8 23 8.3 20 7.6
6 20 8.9 20 9.2 19 8.7 23 8.1 20 7.6
7 19 8.7 20 7.2 20 7.5
8 19 8.8 20 8.9 19 8.7 19 6.8 20 7.2
9 18 8.4 18 8.3 18 6.5 18 6.3
10 18 8.4 16 7.8 18 7.6 17 5.9 16 5.6
11 16 6.5 14 5.2 14 5.4
12 16 6.7 16 7.4 16 6.2 13 5.2 13 5.1
13 15 5.9 13 5.2 12 5.2
14 12 6.3 16 7.1 15 5.5 12 5.2 12 5.3
15 14 5.4 12 5.0 12 5.3
16 10 6.0 15 6.9 12 5.0
17 14 5.3 12 4.9 12 5.2
18 10 5.8 15 6.8 12 4.8
19 14 5.1 12 4.8 12 4.9
20 10 5.6 15 6.5 12 4.8
21 14 5.1 11 4.5 11 4.9
22 10 5.6 15 6.4
23 14 4.7 11 4.8
24 10 5.3
25 14 4.5 11 0.1
26
27 14 4.5 11 0.1
28
29 14 4.3

Recent temperature and dissolved oxygen profile plots

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