Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
OTIS HANCOCK 24 1 2.6 flushes/yr 277 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
13 m
(44 ft) 		5 m
(16 ft) 		48 ha
(119 ac) 		2,421,959 m3
(1,964 ac-ft) 		6 km2
(2.2 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
1994 10.0 52 6.5 4 14 6.2 7.9 9.1 6
1995 6.9 8.3 9.0 6
1996 47 6.1 5 12 6.7 7.5 8.3 6
2004 5.5 6.6 7.4 4
2005 20 6.2 32 7.0 6 6.0 6.1 6.1 1 5.5 5.5 5.5
2013 6.4 27 7.0 4 9 6.4 7.1 8.1 7 3.7 3.7 3.7

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
20 7.5 39 6.5 4.8 11 5.5 7.3 9.1 5 3.7 4.6 5.5

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1995-09-10
1996-08-18
1996-09-01
1996-09-15
2005-08-11
2013-08-04
2013-08-18
2013-09-04
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 18.0 9.0 22.3 8.4 21.5 8.4 18.5 8.7 25.8 7.9 24.1 8.1 22.8 8.6 23.2 8.4
1 25.8 7.9 23.9 8.1 22.2 8.7 23.2 8.3
2 18.0 9.0 22.0 8.4 21.3 8.4 17.5 8.7 25.4 8.0 23.7 8.1 22.0 8.7 23.0 8.4
3 23.8 8.6 23.4 8.2 21.9 8.6 22.8 8.4
4 18.0 9.0 21.0 8.3 21.0 8.4 17.5 8.6 22.0 9.3 21.8 8.5 21.4 8.6 21.7 8.3
5 15.1 9.9 17.2 9.2 19.4 8.6 20.4 8.5
6 18.0 9.0 15.8 5.4 16.0 4.9 17.5 8.6 12.0 6.3 12.6 7.3 13.8 7.1 14.9 6.3
7 11.0 5.3 10.7 6.1 11.3 5.6 11.8 3.8
8 12.0 7.2 10.8 4.3 11.0 3.4 11.3 2.6 10.5 4.6 9.7 5.4 9.8 4.6 10.2 3.1
9 10.0 4.0 10.3 4.1 9.1 4.8 9.2 4.0 9.4 2.8
10 10.0 5.1 9.3 3.2 9.5 2.3 9.5 1.7 10.2 3.7 8.9 4.4 9.0 3.7 9.1 2.5
11 10.1 2.6 8.8 4.2 8.8 3.4 8.9 2.1
12 9.0 0.3 8.5 0.7 8.8 0.7 8.8 0.1 9.8 2.4 8.6 3.7 8.6 2.6 8.7 1.3
13 8.5 0.1 9.7 1.8 8.5 2.9 8.4 1.1 8.4 0.0
14 8.5 0.0 8.5 0.0 8.5 0.0 8.5 0.0 8.3 1.4 8.3 0.0 8.3 0.0

Most recent temperature and dissolved oxygen profile plots

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