Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
PROSPECT WALDO 22 1 0.52 flushes/yr 327 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
12 m
(41 ft) 		6 m
(18 ft) 		64 ha
(158 ac) 		3,538,511 m3
(2,869 ac-ft) 		3 km2
(1 mi2)

Secchi Disk Transparency Graphs

Graph Legend: Secchi symbols = average Secchi Disk Transparency Values; tick marks = maximum and minimum values for each year.

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
1992 7 5.5 10 8.0 8.1 8.2 2 1.3 1.3 1.3
1994 7.0 7.9 7.9 7.9 1 3.5 3.5 3.5
2009 5.6 7.4 8.5 4
2010 4.0 8.2 8.2 8.2 1 2.7 2.7 2.7
2013 5.7 6.9 7.3 8
2014 5.3 7.0 9.2 6
2015 4 8 28 7.2 4.0 18 5.3 7.5 9.4 7 3.2 3.2 3.2
2016 3 8 32 7.2 4.5 5.9 8.0 9.8 7 1.7 2.0 2.4
2017 4.0 7.3 8.6 6 6
2018 5.7 8.0 9.9 7 5

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
3.5 7.7 30 7.2 5 14 4 7.6 9.9 4.9 1.3 2.5 3.5

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2010-09-02
2015-08-27
2016-08-31
Depth (m) TEMP DO TEMP DO TEMP DO
0 25 8.0 25 8.5 24 8.7
1 25 8.0 24 8.5 24 8.7
2 25 8.1 24 8.5 23 8.7
3 24 8.2 24 8.5 23 8.6
4 23 8.3 24 8.5 23 8.6
5 23 8.3 24 8.4 23 8.6
6 23 8.4 24 8.4 23 8.5
7 22 8.2 23 8.2 23 8.5
8 22 6.9 19 6.4 23 8.3
9 20 2.8 16 4.3 21 6.8
10 17 0.8 14 2.7 17 2.4
11 16 0.2 13 0.6 15 0.3
12 12 0.3
13 12 0.3

Most recent temperature and dissolved oxygen profile plots

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