Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
SHAPLEIGH YORK 2 1 1.35 flushes/yr 453 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
6 m
(20 ft) 		3 m
(11 ft) 		20 ha
(49 ac) 		659,855 m3
(535 ac-ft) 		1 km2
(0.5 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
1979 5.5 5.5 5.5 2
1980 7.0 7.0 7.0 1
1985 8.0 28 6 5.3 5.8 6.5 5 6
1987 4.9 5.2 5.4 5 7
1988 4.9 5.2 5.5 5 8
1989 5.0 5.2 5.4 4 8
1990 5.0 5.3 5.5 5 10
1991 7.0 31 7.0 8 5.9 5.9 5.9 1 1
1992 4.7 5.2 5.6 4
1993 4.0 4.8 5.2 3
1994 9.0 9 4.0 4.7 5.5 3 4.0 4.0 4.0
1995 3.5 4.7 5.3 4
1997 3.5 3.9 4.5 2
1999 4.3 4.7 5.7 5 1
2000 11.0 41 13 3.6 4.5 5.5 5 8.2 8.2 8.2
2001 3.7 4.1 4.8 4
2013 7 8.4 38 7.2 10 4.5 4.5 4.5 1 5.0 5.0 5.0

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
7 8.7 34 7.1 9.2 3.5 5.1 7 3.5 4 5.7 8.2

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
1994-08-30
2000-08-25
2013-08-14
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO
0 18 8.5 22 8.8 22 9.2 23 7.9
1 18 8.5 22 8.7 22 9.2 23 7.8
2 18 8.5 22 8.7 21 9.4 23 7.9
3 18 8.5 22 8.7 21 9.4 23 7.8
4 18 8.4 22 8.6 21 9.2 23 7.5
5 17 8.5 22 7.2 21 8.4 23 7.1

Most recent temperature and dissolved oxygen profile plots

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