Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
LINCOLN PENOBSCOT 44 2 1.63 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
14 m
(46 ft) 		3 m
(10 ft) 		109 ha
(269 ac) 		5,606,207 m3
(4,545 ac-ft) 		8 km2
(3.2 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 4.4 5.2 6.2 3
1974 5.8 5.9 6.4 3
1975 5.6 6.0 6.7 2
1976 6.1 6.2 6.4 2
1981 7.5 33 9 3.0 3.7 4.3 5 7.6 7.6 7.6
1982 4.0 14 12 4.6 4.8 5.2 6 2.0 4.0 12.5
1983 3.7 4.1 4.6 6
1984 3.0 3.9 4.6 6
1985 8.0 35 6 24 3.8 4.4 5.9 6
1986 2.7 3.6 4.6 5
1987 3.5 4.2 4.9 6
1988 3.2 4.1 5.0 5
1989 3.0 3.6 4.1 6
1990 3.0 3.6 4.1 6
1991 10.0 24 6.7 7 3.7 4.4 6.8 6 2.6 2.7 2.8
1992 3.6 4.2 4.9 6
1993 3.7 4.3 5.5 6
1995 3.6 4.3 5.4 6
1996 3.3 4.1 4.5 6
1999 6.5 26 8 17 5.6 5.6 5.6 1 3.6 3.6 3.6

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
7.2 26 6.7 8.4 20 2.7 4.5 6.8 4.9 2 4.5 12

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1975-08-08
1975-08-31
1976-08-04
1981-09-16
1982-08-12
1985-08-21
1991-08-28
1999-08-16
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 22 8.5 22 8.2 23 8.5 23 8.2
1 21 8.6 22 8.2 22 8.4 23 8.2
2 23 7.9 19 5.8 20 8.9 21 8.7 22 8.1 22 8.4 22 8.2
3 22 7.7 19 8.6 20 8.8 21 8.8 22 8.1 21 8.1 22 8.2
4 20 8.6 22 8.1 21 7.9 22 8.2
5 22 7.6 18 8.6 20 8.4 18 8.2 20 8.3 22 8.1 20 7.9 22 8.1
6 17 1.8 18 8.6 18 3.7 18 8.2 19 4.7 22 7.7 20 7.7 22 8.1
7 18 8.2 17 0.3 18 0.4 20 6.7 19 0.8
8 14 0.5 14 0.6 15 0.7 17 0.4 14 0.2 17 0.3 20 5.6 17 0.3
9 13 0.3 13 0.4 14 0.6 15 0.1 14 0.1 16 0.2 17 0.4 16 0.3
10 16 0.2 16 0.3 15 0.2
11 15 0.2 15 0.2

Recent temperature and dissolved oxygen profile plots

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