Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
LINCOLN PENOBSCOT 44 1 6.14 flushes/yr 221 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
6 m
(18 ft) 		2 m
(6 ft) 		153 ha
(378 ac) 		2,870,616 m3
(2,327 ac-ft) 		10 km2
(3.8 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 2018 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 1.9 3.0 3.9 3
1974 3.7 3.8 4.0 2
1975 4.0 4.1 4.3 3
1976 4.0 4.0 4.0 2
1981 19 3.0 3.2 3.4 3 6.7 6.7 6.7
1982 2.0 3.0 3.8 5
1983 3.0 3.6 5.1 5
1984 5.0 12 3.1 3.6 3.9 6 8 1.8 3.3 6.2
1985 3.2 3.7 4.2 5 3
1986 2.8 3.5 4.6 5
1987 4.9 28 14 3.4 3.9 4.6 4 5
1988 4.2 4.4 4.6 2 2
1989 2.8 3.4 3.9 6 6
1990 2.1 4.0 5.4 3
1991 3.3 3.5 3.7 3
1992 3.5 3.9 4.4 3 3
1993 3.8 4.2 4.7 3 3

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 28 15 1.9 3.7 5.4 3.7 1.8 5 6.7

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1974-08-12
1974-08-29
1975-08-28
1976-08-02
1984-09-06
1987-08-20
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 19 8.0 25 7.7
1 19 8.0 25 7.7
2 22 8.3 21 8.2 19 8.6 20 7.5 19 8.0 24 7.8
3 21 7.6 21 8.0 19 8.5 20 7.1 19 8.0 22 7.8
4 19 4.7 19 8.0 21 3.8
5 15 0.3 21 0.2 18 8.0 18 2.3

Most recent temperature and dissolved oxygen profile plots

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