Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
LINCOLN PENOBSCOT 44 1 5.22 flushes/yr 213 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
7 m
(22 ft) 		2 m
(8 ft) 		331 ha
(818 ac) 		7,477,820 m3
(6,062 ac-ft) 		42 km2
(16 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 2.4 2.6 3
1974 2.4 3.1 3.7 4
1975 3.0 3.4 3.8 2
1976 16 2.7 3.2 3.7 2
1981 7.0 40 18 1.5 1.5 1.5 1 2.9 2.9 2.9
1982 2.0 2.1 2.3 1 2
1991 10.5 26 6.8 14 3.2 3.5 3.8 2 3.7 4.4 5.2
1992 2.0 2.4 2.8 3
2002 3.1 3.3 3.4 5
2003 41 7.8 33 12 9 3.8 3.8 3.8 1 4.6 4.6 4.6

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
41 8.4 33 6.8 15 9 1.5 2.9 3.8 2.4 2.9 4 5.2

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1975-08-09
1975-08-29
1976-08-03
1976-08-30
1981-09-10
1991-08-28
1992-09-08
2003-08-19
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 19 8.0 23 8.4 21 8.9 24 7.9
1 19 7.9 22 8.4 20 8.9 24 7.9
2 23 7.9 19 8.7 20 8.2 20 8.7 19 7.8 21 8.4 19 8.9 24 7.8
3 23 7.8 19 8.4 20 7.9 20 8.6 18 7.8 21 8.1 19 9.1 24 7.8
4 18 7.7 21 7.6 19 8.9 22 3.6
5 20 2.6 19 8.3 19 4.8 20 8.4 18 7.6 20 7.3 19 8.7 20 0.4
6 17 7.7 20 6.5 19 7.3 18 0.2

Most recent temperature and dissolved oxygen profile plots

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