Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
ORLAND HANCOCK 23 1 2.03 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
10 m
(32 ft) 		4 m
(12 ft) 		142 ha
(351 ac) 		5,264,158 m3
(4,268 ac-ft) 		16 km2
(6.1 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
1987 6 42 4.7 4.7 4.7 1 2.3 2.3 2.3
1990 3.5 5.5 7.0 3
1991 6 34 6.7 10 24 4.5 4.7 4.9 2 4.1 4.7 5.3

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
6 38 6.7 10 24 3.5 5 7 2 2.3 3.5 5.3

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1987-09-03
1991-08-29
Depth (m) TEMP DO TEMP DO
0 20 8.6 23.0 8.8
1 20 8.5 23.0 8.9
2 20 8.4 22.9 8.9
3 20 8.5 21.8 8.4
4 20 8.5 21.0 7.5
5 20 8.3 20.6 6.8
6 19 6.4 19.0 4.2
7 15 0.9 12.9 0.4
8 11 0.8 10.8 0.2
9 9.5 0.1

Recent temperature and dissolved oxygen profile plots

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