Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
SURRY HANCOCK 23 1 0.6 flushes/yr 163 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
37 m
(122 ft) 		6 m
(21 ft) 		949 ha
(2,344 ac) 		61,660,000 m3
(49,989 ac-ft) 		45 km2
(17 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
1980 3.0 4.6 6.2 5
1985 2.7 23 10 3.5 4.2 6.5 3
1986 6.5 6.5 6.5 1
1988 2.1 5.8 10.5 10
1989 3.5 4.6 7.0 6
1990 2.9 3.9 4.8 6
1991 3.0 4.2 4.9 6
1992 3.2 3.8 4.3 5

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
2.7 23 10 2.1 4.7 10 5.2 Inf 1

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1985-09-13
Depth (m) TEMP DO
0 18 9.1
1 18 9.1
2 18 9.1
3 18 9.1
4 18 9.1
5
6 18 9.1
7
8 18 8.8

Most recent temperature and dissolved oxygen profile plots

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