Jim,   Pasted below are the dissolved oxygen measurements that Gavin King recorded yesterday on Spirit and North Spirit lakes.  Oxygen levels are dropping below 1 mg/l in the lower half of the water column in Spirit Lake, so we recommend that your club should start that aerator system within the next 10 days.  In North Spirit Lake oxygen concentration is still greater than 1 mg/l to a depth of 16-17 feet, sLake:   Spirit (Little) Site 1 new      County: Taylor          Season: 2010-11

                        Aerator Started:
Time:   1210
Date:   01/11/2011
Depth   DO(mg/L)        DO      DO      DO      DO      DO      DO
Surface x               x
1'      x
2       8.27
3       5.92
4       1.43
5       1.03
6       0.8
7       0.56
8       0.56
9       x
10
11
12
13
14
15
16
17
18
19
20

25

30
35
40


Ice Depth:      17"
Snow Depth:     1.75"
Conditions:     100%cloudy, lt. snow, 24°F, 1-5mph N wind.


Obs:    New site-Tom Wendt showed me deepest pt in lk. Bottom 8'6". GPS coord:  N45.38028° W90.13854°  Aerator not on-waiting for us to say so. >6trailers, 2shanties.

                Winter Dissolved Oxygen Profiles
Lake:   N. Spirit       Site 1  County: Taylor          Season: 2010-11

                        Aerator Started:
Time:   1400
Date:   01/11/2011
Depth   DO(mg/L)        DO      DO      DO      DO      DO      DO
Surface x               x
1'      x
2       8.22
3       x
4       x
5       7.23
6       x
7       x
8       x
9       3.83
10      x
11      x
12      x
13      2.08
14      x
15      x
16      x
17      1.17
18      x
19      x
20      x
21      0.81
22      0.79
        x
30
35
40


Ice Depth:      14"
Snow Depth:     2"
Conditions:     100%cloudy, lt. snow, 25°F, 1-5mph N wind.


Obs:    Same site as last yr.  Bottom 22'.  Fishermen having luck w/ crappies.  >8 fishermen.

                Winter Dissolved Oxygen Profiles
Lake:   N. Spirit       Site 2 New      County: Taylor          Season: 2010-11

                        Aerator Started:
Time:   1311
Date:   01/11/2011
Depth   DO(mg/L)        DO      DO      DO      DO      DO      DO
Surface x               x
1'      x
2       8.03
3       x
4       7.5
5       x
6       x
7       x
8       4.22
9       x
10      x
11      x
12      2.92
13      x
14      x
15      x
16      1.39
17      x
18      x
19      x
20      0.42
24      0.41
25      0.41
        x
30
35
40


Ice Depth:      13.5"
Snow Depth:     2"
Conditions:     100%cloudy, lt. snow, 25°F, 1-5mph N wind.


Obs:    New site bec. Tom Wendt showed me deepest pt. in lake.  Bottom 25'9".  GPS  N45.38768°  W90.15775°