Clean Lakes Program: Hogback - Steuben County

 

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Indiana Clean Lakes Program Lake Report

Hogback

 

Steuben County

1989

         
Sample Location: Deep Hole
Sample Date: 1989-07-18
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
1989
6.7
1
20
7.2
99
8.4
7.3
700
600
198.5
243.5
0.01
0.648
0.029
0.725
2.479
0.757
0.049
4.66
1.931
4.997
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
25.8
23.7
21
15.7
12.5
11.3
11.1
DO (mg/L)
11.2
5.1
0.4
0.1
0.1
0.1
0.1
                                                                           
% Water Column Oxic: 42.9
 
Blue-Green Dominance (% of NU): 23
 
          Carlson TSI: 57
                    Indiana TSI: 33
                                                                           
Blue-Greens (#/L): 2258   Greens (#/L): 221   Diatoms (#/L): 5992   Other Algae (#/L): 1018   Rotifers (#/L): 289   Zooplankton (#/L): 0
 
 

1990

         
Sample Location: Deep Hole
Sample Date: 1990-08-13
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
1990
6.7
1
20
11
128
8.3
7.2
610
590
208.9
316.05
0.01
1.197
0.078
0.505
0.881
0.625
0.024
7.736
1.572
1.352
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
20.3
20.3
19.3
17.5
13.8
11
10
DO (mg/L)
12.2
11
4.1
0
0
0
0
                                                                           
% Water Column Oxic: 43
 
Blue-Green Dominance (% of NU): 86
 
          Carlson TSI: 64
                    Indiana TSI: 52
                                                                           
Blue-Greens (#/L): 79065   Greens (#/L): 1221   Diatoms (#/L): 6411   Other Algae (#/L): 5190   Rotifers (#/L): 450   Zooplankton (#/L): 0
 
 

1992

         
Sample Location: Deep Hole
Sample Date: 1992-08-17
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
1992
6.7
0.8
12
7
163.6
8.35
7.35
620
680
215.5
319
0.01
0.576
0.048
0.591
3.927
0.891
0.048
4.903
0.433
0.23
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
25.2
22.8
22
21.4
20.5
18.4
16.1
13
12.5
DO (mg/L)
16.8
16.2
14.3
9.65
4.2
0.2
0.1
0.1
0.1
                                                                           
% Water Column Oxic: 54.6
 
Blue-Green Dominance (% of NU): 30
 
          Carlson TSI: 62
                    Indiana TSI: 37
                                                                           
Blue-Greens (#/L): 11070   Greens (#/L): 1687   Diatoms (#/L): 21619   Other Algae (#/L): 1793   Rotifers (#/L): 206   Zooplankton (#/L): 0
 
 

1997

         
Sample Location: Deep Hole
Sample Date: 1997-08-05
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
1997
6.7
1.2
35
10.5
129.2
8.39
7.4
650
550
220.9
320.2
0.01
0.667
0.04
0.73
13.46
0.808
0.029
0.018
3.892
1
5.6
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
25.1
25
24.9
24.9
23
17.5
15.1
12.5
DO (mg/L)
10.65
10.8
10.7
10.7
10.8
0.15
0.1
0.1
                                                                           
% Water Column Oxic: 71.4
 
Blue-Green Dominance (% of NU): 73
 
          Carlson TSI: 57
                    Indiana TSI: 54
                                                                           
Blue-Greens (#/L): 74783   Greens (#/L): 9227   Diatoms (#/L): 5150   Other Algae (#/L): 12446   Rotifers (#/L): 536   Zooplankton (#/L): 73.1
 
 

2002

         
Sample Location: Deep Hole
Sample Date: 2002-08-06
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
2002
6.7
0.7
11
7
94.4
8.1
8.3
600
470
141
27.2
0.01
0.226
0.053
0.251
21.93
0.013
0.013
0.018
3.535
1.116
3.832
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
26.3
26.5
26.5
26.4
24.9
18
13.7
12.6
DO (mg/L)
7.6
7.6
7.6
7.5
1.9
0.4
0.4
0.3
                                                                           
% Water Column Oxic: 44.7
 
Blue-Green Dominance (% of NU): 95
 
          Carlson TSI: 62
                    Indiana TSI: 50
                                                                           
Blue-Greens (#/L): 97219   Greens (#/L): 507   Diatoms (#/L): 1775   Other Algae (#/L): 1944   Rotifers (#/L): 423   Zooplankton (#/L): 99
 
 

2008

         
Sample Location: Site 1
Sample Date: 2008-07-14
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
2008
8
1
9.5
8.5
136.3
5.4
7.5
564
481
207
279
0.01
0.437
0.49
0.064
48.97
1.121
0.013
0.027
2.712
1.25
3.539
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
25.7
25.4
25
24
23.5
21.3
16.4
14
12.7
DO (mg/L)
11.5
11.8
11.3
6.5
3.1
0
0
0
0
                                                                           
% Water Column Oxic: 37.5
 
Blue-Green Dominance (% of NU): 84.7
 
          Carlson TSI: 74
                    Indiana TSI: 48
                                                                           
Blue-Greens (#/L): 46003   Greens (#/L): 2023   Diatoms (#/L): 1224   Other Algae (#/L): 4870   Rotifers (#/L): 100   Zooplankton (#/L): 84
 
 

2008

         
Sample Location: Site 2
Sample Date: 2008-07-14
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
2008
3
1
8.4
8.5
135.8
8.5
7.5
562
560
204
224
0.01
0.01
0.06
0.079
52.59
0.826
0.691
0.111
0.174
1.199
1.251
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
25.5
25.5
25.2
24.2
23.7
21.6
DO (mg/L)
12.8
12.4
11.9
4
0.8
0
                                                                           
% Water Column Oxic: 66.7
 
Blue-Green Dominance (% of NU): 92.4
 
          Carlson TSI: 64
                    Indiana TSI: 42
                                                                           
Blue-Greens (#/L): 80361   Greens (#/L): 1079   Diatoms (#/L): 1249   Other Algae (#/L): 4004   Rotifers (#/L): 199   Zooplankton (#/L): 53
 
 

2010

         
Sample Location: Deep Hole
Sample Date: 2010-06-29
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
2010
7.32
1.2
9.839
9.2
103.2
8.2
7.5
574
453.4
224
266
0.01
0.66
0.02
0.532
6.14
1.435
0.219
0.053
2.491
1.206
3.701
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
26.9
26.8
26.8
25.7
24
18.1
13.9
12.8
DO (mg/L)
9.1
8.8
8.6
4.9
2.1
0.1
0
0
                                                                           
% Water Column Oxic: 41
 
Blue-Green Dominance (% of NU): 16.4
 
Blue-Green Dominance (% of cells): 32.4
          Carlson TSI: 51
                    Indiana TSI: 55
                                                                           
Blue-Greens (#/L): 447355   Greens (#/L): 802607   Diatoms (#/L): 111839   Other Algae (#/L): 19736   Rotifers (#/L): 0   Zooplankton (#/L): 99.7
Blue-Greens (cells/L): 2147   Greens (cells/L): 10575   Diatoms (cells/L): 329   Other Algae (cells/L): 20   Rotifers (cells/L): 0   Zooplankton (cells/L): 0
 
 

 

In 2011 CLP changed plankton sampling methods, thus the Indiana TSI is no longer calculated.
Epi
Epilimnion
Alk
Alkalinity (mg CaCO3/L)
DO
Dissolved Oxygen (mg/L)
NH3
Ammonia (mg-N/L)
SRP
Soluable Reactive Phosphorus (mg-P/L)
Hypo
Hypolimnion
Chl-a
Chlorophyll-a (ug/L)
Light 3'
Percent light penetration at 3ft
NO3
Nitrate (mg-N/L)
TP
Total Phosphorus (mg-P/L)
   
Cond
Conductivity
1% Light Level
Depth of the 1% light level (ft)
TKN
Total Kjeldahl Nitrogen (mg-N/L)
Temp
Temperature (oC)