Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
WELD FRANKLIN 19 1 1.7 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
13 m
(42 ft) 		8 m
(26 ft) 		868 ha
(2,144 ac) 		67,800,000 m3
(54,966 ac-ft) 		186 km2
(72 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
1974 10.4 2.4 4.0 5.2 6 1.6 2.4 3.1
1975 8.5 26 8.0 3.5 5.0 6.9 7 1.1 3.1 5.3
1976 11.8 34 8.0 16.0 3.4 4.9 6.0 8 1.8 3.4 6.5
1977 11.0 4.0 4.0 4.0 1
1979 16.5 4.0 3.5 4.1 4.8 6 3.3 3.3 3.3
1980 3.0 3.5 3.8 4
1981 3.2 3.4 3.7 4
1982 7.0 38 9.0 10.0 4.5 5.0 5.3 5 1.5 2.5 4.2
1983 4.2 4.8 5.2 6
1985 4.4 5.2 5.6 6
1986 4.8 5.2 5.4 6
1987 4.2 4.9 5.3 4
1988 7.2 8.8 4.6 5.3 6.5 6
1989 8.2 8.0 2.0 4.7 5.6 5
1990 6.2 8.0 10.0 4.8 5.4 6.3 7
1991 7.5 6.7 7.6 13.0 4.0 5.1 5.5 5 1.3 3.4 4.6
1992 7.3 6.9 7.0 18.0 4.2 5.3 6.5 2
1998 6.1 13.8 7.9 13.2 3.2 4.7 5.7 5 1.1 3.4 9.4
1999 7.0 32 6.6 15.7 14.2 16.4 5.0 5.6 7.0 5 1.4 3.1 6.5
2000 6.5 10.5 8.0 13.5 4.1 4.6 5.0 5 1.5 3.7 6.9
2001 6.7 8.3 7.5 17.5 4.5 5.4 6.1 4 1.4 3.2 4.6
2002 6.9 12.0 12.0 11.5 4.6 5.2 6.0 3 1.7 2.9 3.7
2003 6.6 10.0 7.0 7.7 4.6 5.6 6.4 6 0.2 1.8 3.4
2004 20 11.5 35 6.7 10.3 10.3 8.0 4.4 5.4 6.1 6 4.1 4.8 7.0
2005 6.4 8.7 13.2 4.7 5.4 6.7 5 3.9 3.9 3.9
2006 6.1 9.7 16.8 3.4 4.9 5.9 5 1.0 3.3 4.9
2007 6.5 10.7 17.8 4.6 5.6 7.8 6 3.8 3.9 4.1
2008 32 7.3 27 6.0 11.0 10.0 11.8 3.5 4.1 4.6 4 1.0 2.7 3.7
2009 6.2 10.8 13.8 3.9 4.7 5.8 4 4.5 4.6 4.7
2010 6.0 7.5 13.8 5.4 5.9 7.0 4 4.0 4.2 4.4
2011 6.4 8.0 9.2 3.4 4.7 5.5 7 5.0 6.5 10.0
2012 6.6 14.8 11.9 3.5 4.5 5.9 6 4.7 5.0 5.4
2013 6.4 2.8 4.7 5.7 6
2014 6.2 14.0 10.0 10.5 4.3 5.5 6.8 5 1.6 2.3 3.4
2015 6.7 5.0 7.0 5.1 6.1 6.5 6 5.6 5.6 5.6
2016 6.7 7.0 13.0 8.3 4.6 6.2 7.3 5 2.6 2.8 3.1
2017 4.2 5.0 6.2 4

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
26 8.3 32 6.4 10 9 13 8.2 2 5 7.8 5.1 0.2 3.6 10

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2015-08-13
2015-08-31
2015-09-15
2016-08-09
2016-08-25
2016-09-07
2017-08-14
2017-09-18
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 23 7.9 23 8.0 22 7.3 24 7.4 23 8.0 23 8.0 23 7.9 21 8.4
1 23 7.9 23 7.9 22 7.1 24 7.4 23 8.0 23 8.0 23 7.1 22 8.5
2 23 7.9 23 7.9 22 7.0 24 7.4 23 7.9 23 8.0 22 8.0 20 8.8
3 23 7.9 23 7.9 22 7.0 24 7.4 22 7.9 22 8.0 22 8.0 19 8.7
4 23 7.9 23 7.9 22 7.0 24 7.3 22 7.7 22 7.7 22 7.9 18 8.4
5 22 7.6 23 7.5 22 6.9 23 7.3 22 7.7 22 7.4 22 7.9 18 8.1
6 22 7.0 22 6.3 22 6.9 23 7.3 22 7.6 22 6.7 21 5.3 18 7.8
7 21 7.3 21 3.9 22 4.0 23 6.5 22 7.4 22 5.5 19 3.0 18 7.6
8 20 3.0 20 2.0 20 0.1 20 3.0 22 7.2 21 5.6 16 1.1 18 7.1
9 18 2.3 19 0.2 19 0.1 17 0.7 21 4.9 21 3.7 14 0.5 17 6.3
10 16 0.2 17 0.1 18 0.1 17 0.3 18 0.2 20 0.2 13 0.2 16 3.7
11 15 0.1 16 0.1 17 0.1 16 0.2 17 0.1 18 0.1 13 0.1 16 1.7
12 15 0.1 15 0.0 16 0.1 16 0.1 16 0.1 17 0.1 12 0.1 14 0.2

Recent temperature and dissolved oxygen profile plots

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