SALMON LAKE

Data period: through 2018

Town	County	Delorme Map #	True Basin	Flushing Rate	Elevation
BELGRADE	KENNEBEC	20	1	0.54 flushes/yr	277 ft

Maximum Depth	Average Depth	Surface Area	Lake Volume	Drainage Area
17 m (57 ft)	7 m (23 ft)	270 ha (666 ac)	20,000,000 m3 (16,214 ac-ft)	8 km2 (3.1 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			38			18			3.6	4.8	6.0	2		9.2	12.8	16.3
1976					25				1.0	4.3	7.5	6		3.1	7.5	13.8
1977		17	37		15		8	17	2.4	5.0	8.4	8		2.3	7.5	15.3
1978		17	71		13	22	17	63	4.4	4.9	5.8	6		1.9	3.4	6.1
1979		16	44		17			44	2.5	5.4	7.5	6		2.0	3.9	9.1
1980		18	55						2.0	4.2	7.0	9		2.2	8.9	25.9
1981		16	58						4.3	6.1	9.4	8		1.7	3.6	5.4
1982		17	60		9		150		4.0	5.5	7.9	6		1.4	3.8	7.0
1983									4.0	5.6	7.0	6		2.4	3.8	5.2
1984								28	1.0	3.6	6.5	5		4.3	4.3	4.3
1985									2.2	4.4	6.2	6		4.9	9.1	14.5
1986									2.5	4.6	7.0	6
1987							16	28	3.0	4.5	8.5	7
1988		16	47		16		42		3.6	4.1	4.8	2
1989									3.0	5.5	7.4	5
1990		21	66	7.7	10				4.5	5.7	6.8	5
1991									3.5	5.3	7.0	5
1992					11		20		4.0	6.5	9.2	6
1993					16				4.1	6.7	8.8	6
1994					11		66		4.2	5.9	7.5	4		1.9	2.5	3.1
1995		19							3.2	4.8	6.9	5
1996					14				3.0	4.1	5.5	3
1997		19	74	7.6	13		122		4.2	5.5	8.9	9		3.0	3.0	3.0
1998					14		340		2.4	4.5	6.3	4
1999		21	79		16		120	80	2.1	4.4	8.6	11		1.5	3.5	6.3
2000					14		106		3.1	5.1	6.8	6
2001					14		114		2.5	5.1	7.0	6
2002									1.8	4.0	6.5	5
2003					13		54		1.8	4.0	6.2	9
2004	4	24	85	7.9	17		118	104	2.3	3.4	5.6	5		13.0	13.0	13.0
2005					11		12		4.1	5.3	6.8	3
2006	7	20	77	7.8	12		24		3.1	4.5	6.4	3		6.3	6.3	6.3
2007	8	21	74	7.8	10			44	5.3	6.3	7.9	4		5.3	5.3	5.3
2008	6	10	76	7.4	11	10	91		3.9	5.4	7.1	6		7.4	7.4	7.4
2009					10	10	250		2.9	4.9	7.1	9		9.8	9.8	9.8
2010					20	9	320	62	2.6	5.3	7.5	7		6.9	6.9	6.9
2011					18		28		2.4	4.5	6.6	7
2012	5	23	80	7.6	14		375		2.9	4.8	5.9	6		8.8	8.8	8.8
2013	9	23	79	7.7	13		150		4.5	5.1	6.5	5		6.0	6.0	6.0
2014	11	24	74	7.5	15		229	11	1.8	4.4	6.4	8		6.4	10.2	17.0
2015					8		87		4.3	5.9	8.4	3		2.2	2.2	2.2
2016	2	24	80	8.3	13		177		2.7	5.1	6.9	4		7.5	7.5	7.5
2017	4	26	84	7.9	12		182		4.8	6.5	7.6	3		3.3	3.3	3.3
2018	5	26	80	8.8	10		132		6.0	6.5	7.4	2		5.0	5.0	5.0

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
6.1	20	68	7.7	14	14	124	48	1	5	9.4	5.6	1.4	6.3	26

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

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

	2014-08-13		2014-08-18		2014-09-03		2014-09-04		2015-08-13		2016-08-18		2017-08-23		2018-08-09
Depth (m)	TEMP	DO	TEMP	DO	TEMP	DO	TEMP	DO	TEMP	DO	TEMP	DO	TEMP	DO	TEMP	DO
0	24.0	9.4	23.0	8.8	24	8.9	23.4	9.3	23	8.2	25	8.9	24	8.7	27.7	9.0
1	24.1	9.4	23.0	8.7	24	9.5	23.4	9.2	23	8.3	25	9.1	24	8.7	27.7	9.0
2	24.1	9.4	23.0	8.6	24	9.3	23.4	9.3	23	8.3	25	9.2	24	8.7	27.7	9.0
3	24.1	9.4	23.0	8.5	24	9.4	23.4	9.2	23	8.3	24	9.1	24	8.7	27.6	9.1
4	24.0	9.3	23.0	8.4	24	9.4	23.1	9.4	23	8.2	24	9.0	24	8.7	26.5	9.6
5	23.4	8.6	23.0	8.4	23	9.3	22.5	8.3	23	8.1	24	8.9	23	8.6	26.3	9.5
6	22.9	7.8	23.0	8.6	23	9.0	21.9	6.9	23	7.9	24	8.7	23	8.5	24.5	9.3
7	18.6	5.6	22.0	8.0	20	4.5	20.4	4.4	21	6.5	22	5.5	22	8.1	18.9	7.2
8	14.8	3.9	17.2	4.5	13	3.7	15.3	0.4	18	4.6	18	1.3	16	1.6	15.4	3.4
9	12.5	2.4	13.0	2.2	14	0.8	12.4	0.4	14	0.7	16	0.5	14	0.8	12.3	0.5
10	10.9	1.0	10.8	0.7	12	0.3	11.1	0.4	12	0.3	14	0.5	12	0.6	10.4	0.2
11	10.2	0.7	10.0	0.5	12	0.3	10.2	0.4	11	0.3	13	0.4	11	0.5	9.3	0.1
12	9.7	0.7	9.4	0.3	10	0.2	9.6	0.4			12	0.4	10	0.5	8.7	0.1
13	9.5	0.6	9.2	0.3	10	0.2	9.5	0.4			12	0.4	10	0.5	8.5	0.0
14	9.1	0.6	9.1	0.3	9	0.1					12	0.4	10	0.4	8.4	0.0
15			9.1	0.2	9	0.1							10	0.4	8.4	0.0

Most recent temperature and dissolved oxygen profile plots

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