Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
OTIS HANCOCK 24 1 0.38 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
45 m
(147 ft) 		12 m
(40 ft) 		265 ha
(655 ac) 		32,000,000 m3
(25,943 ac-ft) 		11 km2
(4.3 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
1974 5.5 24 7.4 7.4 7.4 1 3.2 3.20 3.2
1975 4.0 16 9 7.9 8.3 8.8 2 1.8 1.80 1.8
1976 5.0 29 10.0 7.3 7.6 8.0 2 3.0 3.00 3.0
1990 6.0 24 6.6 4.0 7.8 7.8 7.8 1 1.6 1.60 1.6
1991 4.0 5.8 5.5 7.1 8.1 4 0.3 0.45 0.6
1996 5.0 24 5.0 4 7.3 7.3 7.3 1 2.2 2.20 2.2
2016 9.5 6.0 25 6.9 3.5 9.8 9.8 9.8 1 1.7 1.70 1.7

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
9.5 5.1 24 6.2 5.6 9 4 5.5 7.9 9.8 1.7 0.3 2 3.2

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1974-08-12
1975-09-24
1976-09-13
1990-09-18
1996-08-29
2016-09-15
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 24.0 9.7 16.2 9.9 17.5 9.1 17.9 9.5 23.0 8.0 20.7 8.9
1 16.1 9.8 17.3 9.3 18.0 9.4 23.0 8.0 20.7 8.9
2 23.0 10.0 16.1 9.6 18.0 9.4 22.9 8.0 20.7 8.9
3 22.8 10.0 16.1 9.6 17.1 9.4 18.0 9.4 22.3 8.0 20.7 8.9
4 16.1 9.5 18.0 9.4 22.2 8.0 20.7 8.9
5 22.8 10.0 16.1 9.6 17.0 9.6 18.0 9.4 22.1 7.9 20.7 8.9
6 20.8 10.6 16.1 9.6 18.0 9.3 22.0 7.7 20.7 8.9
7 16.1 9.5 17.0 9.7 18.0 9.3 19.7 7.2 20.7 8.8
8 15.2 11.0 15.9 9.4 16.8 9.0 17.0 6.9 19.6 8.6
9 11.0 10.6 14.9 9.1 16.5 9.3 14.8 9.0 13.9 7.9 15.5 8.5
10 12.2 9.6 11.6 8.6 11.3 8.5 11.7 7.9 12.7 8.5
11 10.0 10.6 8.8 9.8 10.5 8.4 10.0 8.0 10.7 8.5
12 9.5 10.6 7.6 9.6 10.3 8.8 10.0 8.4 9.1 8.1 9.6 8.5
13 7.1 9.8 9.2 8.6 8.8 8.3 8.9 8.5
14 8.8 10.6 6.9 9.5 9.1 8.8 8.9 8.6 8.2 8.3 8.7 8.5
15 8.5 10.5 6.8 9.0 8.1 8.8 7.9 8.3 8.4 8.5
16 6.5 9.3 8.9 8.9 8.0 8.7 7.9 8.3
17 8.1 10.3 7.6 8.3 7.7 8.3
18 8.0 10.4 6.1 9.0 7.2 8.2
19 7.1 8.1 7.5 8.2
20 8.0 10.4 6.0 9.4 8.0 8.6 7.1 8.1
21 7.9 10.4 7.0 8.1 7.3 8.2
22 6.0 9.3 7.0 8.1
23 7.8 10.3 7.0 8.1 7.2 8.2
24 7.8 10.2 5.9 9.4 8.0 8.8 7.0 8.1
25 7.0 8.1 7.1 8.1
26 7.8 10.1 5.9 9.3 7.0 8.0
27 7.5 10.2 7.0 8.0
28 5.8 9.4 7.8 8.4 6.9 8.0
29 7.5 10.2 6.9 8.0
30 7.5 10.2 5.7 8.9 7.6 8.2 6.8 7.8 7.0 7.5
31
32
33
34
35 7.5 10.0 5.5 8.4 7.6 7.9 6.8 7.7 7.0 4.5
36
37
38
39
40 7.5 9.9 5.5 7.0 7.5 1.6 6.8 7.4

Recent temperature and dissolved oxygen profile plots

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