Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
EAST MACHIAS WASHINGTON 26 1 0.78 flushes/yr 67 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
17 m
(56 ft) 		7 m
(24 ft) 		1,431 ha
(3,537 ac) 		103,919,142 m3
(84,249 ac-ft) 		17 km2
(6.5 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
1988 4.0 4.2 4.8 2
1989 3.0 4.0 4.6 6
1990 3.6 4.0 4.5 5
1991 9 20 6.8 6 3.8 4.2 4.5 4 4 4 4
1993 4.5 4.8 5.0 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
9 20 6.8 6 3 4.2 5 4 4 4 4

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1991-09-05
Depth (m) TEMP DO
0 20 8.9
1 20 8.8
2 20 8.8
3 20 8.8
4 20 8.7
5 20 8.7
6 20 8.6
7 19 8.5
8 19 8.5
9 19 8.5
10 19 8.5
11 19 8.5
12 19 8.5
13 19 8.3

Most recent temperature and dissolved oxygen profile plots

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