Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
SEVEN PONDS TWP FRANKLIN 28 1 NA flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
6 m
(20 ft) 		1 m
(5 ft) 		8 ha
(20 ac) 		NA m3
(NA ac-ft) 		NA km2
(NA 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
1998 6.2 20 12 2.5 3.4 4.0 2 4.1 4.1 4.1
1999 5.0 22 12 14 4.0 4.4 4.9 1 1.5 3.4 5.2

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
5.6 21 12 14 2.5 3.9 4.9 1.5 1.5 3.7 5.2

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1998-08-13
1999-08-10
Depth (m) TEMP DO TEMP DO
0 21 7.7 17 8.7
1 20 7.6
2 19 7.1
3 17 3.6
4 14 0.2
5 17 8.6
6
7
8
9
10 17 8.5
11
12
13
14
15 17 7.7
16
17
18 14 0.1

Recent temperature and dissolved oxygen profile plots

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