Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
LINCOLN PENOBSCOT 44 1 2.43 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
14 m
(46 ft)
3 m
(10 ft)
185 ha
(457 ac)
7,221,494 m3
(5,855 ac-ft)
15 km2
(5.9 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 4.3 5.3 6.4 3
1974 4.3 5.4 6.1 3
1975 6.2 6.4 7.0 2
1976 5.5 6.0 6.4 2
1981 12.0 38 13.0 17 3.0 3.6 4.1 6 4.9 4.9 4.9
1982 4.0 12 16.0 24 4.3 4.7 6.0 6 1.8 3.4 5.0
1983 3.7 4.4 4.9 6
1984 3.0 4.0 4.7 6
1985 5.0 30 7.0 19 3.8 4.3 6.0 6
1986 2.7 3.6 4.0 5
1987 4.0 4.3 5.0 6
1988 3.5 4.1 4.6 5
1989 2.9 3.4 4.0 6
1990 2.9 3.6 4.3 6
1991 9.5 23 6.8 6.5 3.7 4.3 5.8 6 1.9 2.2 2.5
1992 3.8 4.1 4.9 6
1993 3.7 4.3 5.0 6
1995 3.8 4.4 5.1 6
1996 3.3 4.1 4.7 6
1997 6.0 26 7.0 7.0 10 5.3 5.5 5.7 1 5.8 5.8 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
7.3 26 6.9 9.9 18 2.7 4.5 7 5 1.8 4.1 5.8

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
1997-08-13
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 18 8.4 22 8.6 23 8.5 23 8.2 23 8.7
1 18 8.4 22 8.6 23 8.5 22 8.2 23 8.5
2 23 8.4 19 9.3 20 9.1 18 8.4 21 8.6 23 8.5 22 8.2 23 8.5
3 23 8.2 18 9.1 20 9.0 18 8.0 21 8.6 22 8.5 21 7.8 23 8.5
4 18 7.8 21 8.6 22 8.5 21 7.8 22 7.8
5 22 5.1 18 8.9 20 8.3 18 8.0 20 7.0 22 8.4 21 7.8 20 5.3
6 13 2.6 15 1.4 15 3.0 18 7.6 17 1.8 18 2.8 21 7.5 16 2.8
7 17 2.7 13 0.4 16 1.0 20 3.9 13 1.8
8 11 0.8 12 0.6 12 1.7 16 0.3 12 0.3 15 0.4 18 0.6 12 1.3
9 10 0.5 11 0.6 12 1.2 15 0.3 11 0.2 14 0.3 17 0.3 12 1.1
10 14 0.2 10 0.2 14 0.3 16 0.2 12 0.3
11 10 0.3 12 0.7 13 0.2 10 0.2 13 0.2

Recent temperature and dissolved oxygen profile plots

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