Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
GREAT POND PLT HANCOCK 34 1 0.9 flushes/yr 390 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
11 m
(36 ft) 		5 m
(15 ft) 		103 ha
(254 ac) 		4,758,374 m3
(3,858 ac-ft) 		6 km2
(2.5 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
1982 3.4 3.6 3.7 2
1983 9 4 9 7.5 7.5 7.5 1 1.9 1.9 1.9

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
9 4 9 3.4 5.5 7.5 1.5 1.9 1.9 1.9

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1983-09-12
Depth (m) TEMP DO
0 23 8.4
1 23 8.4
2 23 8.4
3 23 8.4
4 23 8.3
5 23 8.3
6 23 8.1
7 22 8.1
8 18 4.7
9 15 1.2
10 14 0.3

Most recent temperature and dissolved oxygen profile plots

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