Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
COBURN GORE FRANKLIN 38 1 6.78 flushes/yr 1375 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
19 m
(62 ft) 		7 m
(23 ft) 		58 ha
(143 ac) 		4,057,751 m3
(3,290 ac-ft) 		34 km2
(13 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 3.3 3.3 3.3 1
1989 12 35 8 3.6 3.6 3.6 1 4.2 4.2 4.2
2001 13 40 7.4 7 8.5 4.0 4.0 4.0 2 4.9 4.9 4.9

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
12 38 7.4 7.5 8.5 3.3 3.6 4 1.3 4.2 4.6 4.9

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1989-09-11
2001-08-27
Depth (m) TEMP DO TEMP DO
0 20.2 9.5 20.9 8.3
1 20.8 9.5 20.9 8.3
2 17.2 10.2 20.9 8.3
3 16.6 8.8 20.8 8.0
4 16.2 8.2 20.1 8.0
5 16.0 7.7 15.2 0.5
6 15.2 6.4 11.1 0.5
7 9.8 3.8 7.9 2.2
8 8.0 4.8 6.6 3.0
9 7.0 4.8 5.8 2.9
10 6.4 5.2 5.0 2.7
11 6.0 4.8 4.9 1.9
12 5.8 4.6 4.3 0.9
13 5.4 3.4 4.1 0.3
14 5.2 2.6 4.0 0.2
15 5.1 1.0 4.0 0.2
16 5.1 0.8 4.0 0.2
17 5.1 0.3 4.0 0.2
18 5.1 0.2

Most recent temperature and dissolved oxygen profile plots

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