Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
LINCOLN PENOBSCOT 44 1 0.97 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
9 m
(30 ft) 		3 m
(10 ft) 		90 ha
(222 ac) 		2,676,295 m3
(2,170 ac-ft) 		4 km2
(1.7 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
1973 3.4 4.5 5.3 3
1974 4.6 5.0 5.5 2
1975 4.7 5.6 6.1 3
1976 4.9 5.0 5.2 2
1981 6.0 37 11 3.8 4.0 4.2 3 4.1 4.1 4.1
1982 2.4 4.4 5.6 5
1983 3.8 4.7 5.3 5 1
1984 4.5 8 3.3 4.6 5.4 6 2.2 3.1 4.3
1985 5.0 5.6 6.1 5
1986 4.2 4.9 5.9 5
1987 4.2 25 10 22 4.3 5.2 5.7 4
1988 4.9 5.2 5.5 2
1989 3.1 3.8 4.4 6
1990 2.9 3.5 4.2 3
1991 8.0 7.7 16 3.5 4.5 5.2 3 3.7 3.7 3.7
1992 4.1 5.2 6.8 3
1993 4.7 5.2 5.5 3
2000 6.0 22 9 19 4.5 4.5 4.5 1 3.7 3.7 3.7

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
5.7 28 7.7 11 20 2.4 4.7 6.8 3.6 2.2 3.7 4.3

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1974-08-02
1974-08-29
1975-08-28
1976-08-02
1981-09-10
1984-09-06
1987-08-20
2000-08-21
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 19 8.3 20 8.2 25 7.8 21 7.9
1 19 8.2 20 8.1 25 7.8 21 7.8
2 22 8.4 21 8.4 20 8.6 22 8.2 19 8.1 20 8.1 24 7.9 21 7.8
3 22 8.0 21 8.2 20 8.4 20 7.7 19 8.2 20 8.1 23 7.8 20 7.8
4 19 8.1 20 8.1 22 7.8 20 7.8
5 18 0.6 19 2.0 19 7.3 18 2.6 18 8.2 19 7.8 21 4.0 20 6.3
6 14 0.2 15 0.2 16 2.0 15 0.8 18 8.0 19 0.1 19 2.0 17 0.2
7 18 8.0 16 0.4 15 0.2
8 13 0.2 13 0.1 14 0.8 14 0.5 13 0.2
9 12 0.2
10 12 0.1

Recent temperature and dissolved oxygen profile plots

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