MARANACOOK LAKE

Data period: through 2017

Town	County	Delorme Map #	True Basin	Flushing Rate
WINTHROP	KENNEBEC	12	1	0.81 flushes/yr

Maximum Depth	Average Depth	Surface Area	Lake Volume	Drainage Area
36 m (118 ft)	8 m (27 ft)	472 ha (1,166 ac)	51,158,452 m3 (41,475 ac-ft)	23 km2 (8.9 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
1975									4.9	5.8	6.7	3
1976					8.7				4.8	5.6	6.8	7		2.3	3.9	5.8
1978					11.5				5.2	5.7	6.5	4		1.3	1.9	2.6
1979					6.0				5.3	6.4	8.6	6		2.4	3.3	4.1
1980					16.0				5.7	6.2	7.3	4		2.6	4.7	6.8
1981					11.0			10	4.7	5.9	6.7	5		1.7	2.4	3.1
1982					7.5			9	5.9	6.8	8.5	7		1.8	3.2	4.9
1983					6.0				4.5	5.6	6.1	6		2.4	3.7	6.4
1984									5.1	6.1	6.9	5
1985			46		7.8				5.2	6.2	7.5	6		2.4	2.4	2.4
1986					9.0				5.4	6.0	7.0	6
1987		13			13.5				4.7	6.0	6.9	6
1988									6.5	7.2	8.7	4
1989									4.7	5.5	6.5	4
1990		16		7.0	7.7		9.2		5.5	6.4	7.6	6
1991		15		7.0				25	3.0	5.8	7.9	5
1992		15	57	6.8					5.0	5.4	6.0	5		2.9	4.6	5.8
1993		16		6.9	9.5				4.2	6.4	8.3	6		2.2	3.8	6.8
1994									5.4	6.2	7.2	5
1995		17		6.9	8.0				3.3	6.4	7.6	6
1996									3.1	5.1	6.7	6
1997									3.9	5.8	6.9	6
1998		15		6.9	9.8				4.6	5.5	6.5	6		4.0	4.8	7.4
1999									3.8	5.8	8.8	12
2000									4.5	6.0	7.2	6
2001		15		7.0	9.4				5.6	7.2	8.4	6		2.0	5.0	6.7
2002		16		7.0	7.5				6.4	7.2	7.9	6		2.3	3.8	6.0
2003									6.0	7.3	8.8	6
2004									5.5	7.3	8.9	6
2005		12			7.6				5.2	6.1	7.2	5		2.1	4.4	11.3
2006	11	16	77	7.4	8.0				5.2	6.1	7.0	6
2007									5.8	6.8	7.6	6
2008		17		7.0	8.2				4.8	6.2	7.7	6		3.7	5.2	6.6
2009		19							5.1	5.4	5.8	6
2010									5.2	6.3	7.7	6
2011		16			9.6				5.5	6.2	7.0	5		3.1	3.6	3.9
2012	10	18	73	7.6	6.0				6.0	6.7	7.7	7
2013									5.2	6.1	7.1	7
2014		18			8.4				4.2	6.7	7.5	10		3.2	4.9	6.0
2015									5.5	6.8	8.1	8
2016									5.8	7.4	9.4	9
2017		19			8.0		6.0		5.8	6.8	7.7	7		3.1	4.5	5.8

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
10	16	63	7	8.9		7.6	15	3	6.3	9.4	6	1.3	3.9	11

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L

	2014-09-05		2015-08-04		2015-09-01		2016-08-05		2016-08-18		2016-09-13		2017-08-14		2017-09-05
Depth (m)	TEMP	DO	TEMP	DO	TEMP	DO	TEMP	DO	TEMP	DO	TEMP	DO	TEMP	DO	TEMP	DO
0	24.1	8.3	24.7	8.3	25.3	8.4	25.6	8.1	25.2	8.1	22.9	8.1	24.0	8.2	20.0	9.0
1	23.9	8.4	24.6	8.4	24.5	8.5	25.6	8.1	25.1	8.2	22.9	8.0	24.1	8.3	20.0	8.9
2	23.4	8.4	24.5	8.5	24.4	8.6	25.4	8.2	25.0	8.2	22.8	8.0	24.0	8.2	20.0	8.9
3	23.3	8.4	24.4	8.3	24.2	8.6	25.1	8.3	24.8	8.2	22.6	8.1	23.9	8.3	20.0	8.9
4	23.2	8.4	24.1	8.5	24.2	8.6	24.9	8.2	24.4	8.2	22.4	8.1	23.8	8.2	20.0	8.9
5	22.9	8.3	23.9	8.5	24.0	8.6	24.7	8.2	24.3	8.2	22.4	8.0	23.7	8.2	19.9	8.8
6	22.8	8.2	21.7	8.8	23.8	8.6	22.5	8.7	24.2	8.2	22.4	8.0	22.2	8.6	19.7	8.9
7	17.6	3.8	17.0	7.0	19.9	6.6	16.2	8.2	18.2	7.2	22.1	7.8	15.9	6.5	19.5	8.4
8	13.5	3.6	12.8	5.8	15.0	3.8	13.9	7.3	15.1	7.0	16.6	4.9	13.0	6.1	14.2	5.0
9	11.4	3.7	11.7	5.9	12.1	4.1	12.1	7.1	13.1	6.7	13.1	5.2	11.3	6.2	12.1	5.5
10	9.9	4.2	10.3	6.3	10.1	4.6	11.4	7.4	11.6	6.9	12.1	4.8	10.2	6.2	10.7	5.3
11	9.3	4.6	9.5	6.6	9.1	5.7	10.8	7.4	10.6	6.3	11.1	4.6	9.7	6.0	9.9	5.0
12	9.0	4.7	8.7	7.2	8.6	5.6	9.9	6.9	10.2	6.3	10.2	5.2	9.2	6.3	9.6	5.2
13	8.6	4.9	8.1	7.9	8.2	6.9	9.6	7.2	9.5	6.9	9.9	5.2	8.6	6.8	9.0	5.6
14	7.8	6.1	7.4	8.8	7.7	8.3	9.1	7.1	9.0	7.0	8.8	6.5	8.1	7.2	8.6	6.3
15	7.2	6.9	7.2	9.1	7.3	8.1	8.1	7.8	8.4	7.5	8.3	6.5	7.1	7.2	7.6	6.9
16	7.0	6.9	7.1	9.4	7.0	7.9	7.7	8.0	8.1	7.8	7.9	6.4	6.9	7.5	7.2	6.9
17	6.7	6.6	6.7	8.9	6.9	7.7	7.6	8.2	7.9	7.7	7.7	6.4	6.7	7.4	6.8	6.6
18	6.6	6.9	6.7	8.9	6.7	8.1	7.4	8.4			7.6	6.5	6.5	7.6	6.7	6.9
19	6.5	6.9	6.6	8.9	6.6	8.3	7.3	8.3	7.4	8.1	7.4	6.6	6.5	7.3	6.5	7.1
20	6.4	6.8	6.6	8.8	6.6	8.2	7.3	8.3			7.3	6.5	6.4	7.3	6.4	7.2
21	6.3	7.1	6.5	8.9	6.5	7.7	7.3	8.3	7.3	7.6	7.3	6.5	6.4	7.2	6.4	7.1
22	6.3	7.1	6.5	9.0	6.5	7.7	7.2	8.2			7.3	6.4	6.3	6.4	6.4	7.1
23	6.3	7.0	6.5	8.9	6.5	7.8	7.2	8.2	7.2	7.6	7.2	6.3	6.3	7.4	6.3	7.0
24	6.3	6.9	6.4	9.0	6.4	7.8	7.1	8.1			7.2	6.3	6.2	7.2	6.3	6.9
25	6.2	6.9	6.4	8.9	6.4	7.8	7.0	7.7	7.1	7.4	7.1	6.2	6.2	7.1	6.2	6.9
26	6.1	6.6	6.4	8.8	6.3	7.6	7.0	7.4			7.1	6.2	6.1	6.9	6.2	6.9
27	6.1	6.4	6.3	8.6	6.3	7.5	7.0	7.3	7.0	7.3	7.0	5.6	6.1	6.7	6.1	6.4
28	6.1	6.2	6.3	8.4	6.2	6.7	7.0	7.2			7.0	5.3	6.0	6.7	6.1	6.4
29	6.1	5.9	6.3	8.1	6.2	6.2	7.0	7.1	7.0	6.6	7.0	5.4	6.0	6.6	6.1	6.2
30	6.0	5.3	6.2	7.6	6.2	5.4	6.9	6.7	6.9	6.2	6.9	4.4	6.0	6.3	6.0	5.3
31
32
33
34
35	6.0	3.9	6.2	6.9	6.1	3.5	6.9	6.2	6.9	5.2	6.9	3.0	6.0	5.7	6.0	3.9

Recent temperature and dissolved oxygen profile plots

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