2.5.1 Lakes

Katrina Lake is the primary lake within the subwatershed, serving as the headwaters for Painter Creek.  It is a shallow lake and has a surface area of about 202 acres.  Thies Lake is a small lake located in the top of the subwatershed.   Neither lake is monitored as part of the District’s monitoring program, and little or no water quality data is available for them.   The HHPLS did not specifically model these lakes nor establish water quality goals for them.

Table 4.  Physical characteristics of lakes in the Painter Creek subwatershed.

Lake 

Surface Area

Maximum Depth

Watershed to Lake Area Ratio

DNR Classification

Katrina

202

N/A

15:1

Natural Environment

Thies

11

27

40:1

Natural Environment

Source: Minnesota DNR.

Table 5.  Selected water quality goals and current conditions of lakes in the Painter Creek subwatershed.

Lake

1997 TP Goal

HHPLS TP Goal

1997-2004 Average TP

2004

TP (μg/L)

Chl-a (μg/L)

Secchi (m)

TSI

Katrina

N/A

N/A

N/A

N/A

N/A

.5-1*

N/A

Thies

50

N/A

N/A

N/A

N/A

1-2*

N/A

*Clarity as estimated by the University of Minnesota using satellite imagery

Source:  MCWD.  Satellite data from Minnesota DNR/University of Minnesota.

The Maple Plain wastewater treatment plant operated from 1952 to 1986, with the wastewater lagoon discharging to Katrina Lake.   The MCES estimates that while it operated the plant was responsible for 45 percent of the phosphorus load to downstream Jennings Bay.  The lake, Painter Creek, in-line wetlands, and Jennings Bay may continue to be impacted by residual phosphorus in sediments, but no data is available to determine if this is the case.