Survey Report

Bowman-Haley Dam
Bowman County

June 2026

2025 Survey Year

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Black Bullhead

39.8

9.3

8.3-10.6

9.6

0.3-0.8

0.6

Common Carp

17.6

4.1

5.1-29.9

20.4

0.1-14.3

4.9

White Bass

12.8

3.0

10.2-15.0

13.1

0.5-1.7

1.0

Shorthead Redhorse

7.1

1.7

14.6-19.3

17.0

1.2-2.7

2.1

Yellow Perch

7.1

1.7

7.1-10.2

8.7

0.2-0.5

0.4

Northern Pike

4.8

1.1

16.5-35.4

27.8

0.7-10.1

5.2

Walleye

4.3

1.0

9.4-28.0

18.2

0.3-8.8

2.7

River Carpsucker

4.0

0.9

12.6-26.4

22.8

1.1-9.5

6.8

White Sucker

2.0

0.5

11.4-17.7

14.7

0.6-2.2

1.4

Black Crappie

0.3

0.1

7.5-7.5

7.5

0.2-0.2

0.2

Channel Catfish

0.3

0.1

12.6-12.6

12.6

0.7-0.7

0.7

Fish Per

Length (Inches)

Weight (Pounds)

Electrofishing-Boat

Catch

Hour

Range

Average

Range

Average

Smallmouth Bass

100.0

45.0

7.1-18.1

9.5

0.2-3.5

0.6

2024 Survey Year

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Black Bullhead

46.2

12.7

5.9-10.2

7.7

0.1-0.8

0.3

Common Carp

14.4

3.9

7.1-30.3

15.9

0.2-12.6

2.5

White Bass

11.6

3.2

6.3-14.6

12.1

0.1-1.2

0.8

Northern Pike

8.2

2.3

17.3-37.8

25.7

0.9-13.9

4.4

Shorthead Redhorse

7.5

2.1

15.0-20.5

17.0

1.5-4.1

2.2

Yellow Perch

5.9

1.6

6.7-10.6

7.9

0.1-0.7

0.3

Walleye

3.6

1.0

9.8-26.0

16.4

0.3-7.5

1.9

River Carpsucker

0.9

0.3

21.3-23.2

22.0

5.1-6.3

5.8

White Sucker

0.9

0.3

14.2-16.9

16.0

1.2-2.4

2.0

Black Crappie

0.7

0.2

6.7-7.1

6.8

0.2-0.3

0.2

Fish Per

Length (Inches)

Weight (Pounds)

Electrofishing-Boat

Catch

Hour

Range

Average

Range

Average

Smallmouth Bass

100.0

30.0

5.1-18.5

7.3

0.1-3.6

0.4

2023 Survey Year

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Black Bullhead

29.7

5.9

5.1-11.4

6.6

0.1-0.9

0.2

Shorthead Redhorse

16.5

3.3

13.0-20.5

16.5

1.0-3.8

2.0

White Bass

13.9

2.8

7.1-14.2

12.5

0.1-1.2

0.9

Common Carp

13.6

2.7

7.1-29.1

15.7

0.2-15.1

3.0

Walleye

10.1

2.0

8.3-21.3

15.0

0.1-3.6

1.3

Yellow Perch

9.2

1.8

5.1-11.0

7.9

0.1-0.8

0.3

River Carpsucker

2.5

0.5

20.1-25.2

22.1

3.9-8.3

5.7

White Sucker

1.9

0.4

12.2-18.1

15.7

0.8-2.5

1.8

Northern Pike

1.6

0.3

14.2-26.4

19.4

0.5-4.6

2.0

Black Crappie

0.6

0.1

4.3-4.7

4.5

0.0-0.1

0.0

Channel Catfish

0.3

0.1

29.5-29.5

29.5

10.0-10.0

10.0

Fish Per

Length (Inches)

Weight (Pounds)

Electrofishing-Boat

Catch

Hour

Range

Average

Range

Average

Smallmouth Bass

100.0

7.5

5.9-12.2

10.0

0.1-0.9

0.7

2022 Survey Year

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Shorthead Redhorse

25.6

3.8

9.1-20.1

15.4

0.4-3.6

1.7

White Bass

21.6

3.2

11.8-13.8

13.1

0.8-1.3

1.0

Common Carp

17.6

2.6

8.3-29.1

20.0

0.4-12.0

5.2

Walleye

10.2

1.5

11.8-27.2

15.7

0.5-7.9

1.8

Black Bullhead

9.7

1.4

9.4-11.0

10.1

0.5-0.8

0.6

River Carpsucker

8.0

1.2

20.1-24.8

22.1

4.7-8.0

5.8

White Sucker

4.0

0.6

13.0-16.9

15.2

1.0-2.4

1.8

Northern Pike

1.7

0.3

18.1-34.3

25.7

1.0-9.8

4.6

Yellow Perch

1.7

0.3

6.3-10.2

8.1

0.1-0.6

0.3

Fish Per

Length (Inches)

Weight (Pounds)

Electrofishing-Boat

Catch

Hour

Range

Average

Range

Average

Smallmouth Bass

100.0

56.7

7.5-17.7

10.2

0.2-2.6

0.7

2021 Survey Year

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Black Bullhead

51.8

13.6

6.7-13.0

9.2

0.2-1.3

0.5

White Bass

14.8

3.9

11.4-14.2

12.8

0.7-1.2

0.9

Shorthead Redhorse

10.1

2.6

7.1-20.5

16.8

0.1-3.7

2.3

Northern Pike

5.4

1.4

15.0-39.0

23.8

0.6-13.6

3.6

Walleye

5.4

1.4

9.1-26.4

15.6

0.2-7.2

1.8

Common Carp

4.5

1.2

10.6-32.7

22.9

0.8-15.0

7.3

River Carpsucker

4.5

1.2

19.7-26.4

21.7

3.8-8.0

5.5

White Sucker

1.8

0.5

11.8-18.9

14.6

0.7-3.0

1.5

Yellow Perch

1.6

0.4

5.5-9.8

8.5

0.1-0.6

0.4

Smallmouth Bass

0.2

0.1

11.0-11.0

11.0

0.7-0.7

0.7

Fish Per

Length (Inches)

Weight (Pounds)

Electrofishing-Boat

Catch

Hour

Range

Average

Range

Average

White Bass

84.8

260.0

12.2-14.2

12.9

0.8-1.2

0.9

Smallmouth Bass

13.0

40.0

6.7-14.6

9.6

0.2-1.6

0.6

Green Sunfish

1.1

3.3

5.9-5.9

5.9

0.2-0.2

0.2

Yellow Perch

1.1

3.3

7.5-7.5

7.5

0.2-0.2

0.2

2020 Survey Year

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Walleye

21.1

2.6

8.7-26.4

13.8

0.2-7.2

1.2

White Bass

18.3

2.2

7.1-13.8

12.7

0.2-1.1

0.9

Common Carp

17.0

2.1

13.8-29.9

22.5

1.4-13.5

6.0

Black Bullhead

13.8

1.7

5.1-12.6

8.8

0.1-1.1

0.5

Yellow Perch

8.7

1.1

5.9-10.2

7.5

0.1-0.7

0.2

Shorthead Redhorse

8.3

1.0

17.3-19.7

18.2

2.0-2.8

2.4

River Carpsucker

6.4

0.8

17.7-24.8

20.4

2.6-7.1

4.6

Northern Pike

4.6

0.6

15.7-34.6

23.0

0.7-10.2

3.6

White Sucker

1.8

0.2

16.5-18.1

17.3

2.0-2.4

2.2

Fish Per

Length (Inches)

Weight (Pounds)

Electrofishing-Boat

Catch

Hour

Range

Average

Range

Average

Bluegill

30.8

40.0

Smallmouth Bass

28.2

36.7

5.5-16.5

11.6

0.1-2.6

1.2

Common Carp

20.5

26.7

Black Bullhead

5.1

6.7

Northern Pike

5.1

6.7

White Bass

5.1

6.7

Walleye

2.6

3.3

Yellow Perch

2.6

3.3

2019 Survey Year

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Shorthead Redhorse

24.8

1.9

16.1-19.3

17.7

1.3-2.6

2.0

White Bass

24.1

1.9

11.8-14.2

12.7

0.7-1.1

0.8

Common Carp

17.0

1.3

7.9-29.5

23.7

0.3-13.4

7.1

Walleye

10.6

0.8

9.8-24.8

15.6

0.3-6.3

1.8

Black Bullhead

9.2

0.7

10.2-12.2

11.5

0.7-1.0

0.8

Northern Pike

6.4

0.5

11.8-40.2

24.4

0.3-16.2

5.0

River Carpsucker

5.0

0.4

19.3-22.4

20.8

3.6-5.4

4.4

White Sucker

2.1

0.2

13.4-15.4

14.3

1.1-1.6

1.3

Yellow Perch

0.7

0.1

9.4-9.4

9.4

0.5-0.5

0.5

Fish Per

Length (Inches)

Weight (Pounds)

Electrofishing-Boat

Catch

Hour

Range

Average

Range

Average

Smallmouth Bass

93.8

50.0

8.3-15.0

12.2

0.3-2.0

1.1

Green Sunfish

6.3

3.3

5.9-5.9

5.9

0.2-0.2

0.2

2018 Survey Year

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Shorthead Redhorse

28.9

4.9

15.0-19.3

17.3

1.5-3.5

2.2

Black Bullhead

23.3

3.9

9.4-13.0

11.5

0.7-1.4

1.0

White Bass

15.4

2.6

10.6-13.8

12.3

0.6-1.1

0.8

Common Carp

14.1

2.4

15.0-31.1

21.8

1.8-15.8

5.4

Walleye

8.2

1.4

7.9-26.0

13.7

0.1-5.6

1.0

River Carpsucker

3.3

0.6

16.9-24.4

19.3

2.5-6.4

4.3

Northern Pike

3.0

0.5

21.7-37.0

31.2

1.6-11.0

7.0

White Sucker

2.0

0.3

15.4-18.5

16.8

1.6-2.8

2.2

Yellow Perch

1.6

0.3

9.8-11.4

10.4

0.5-0.6

0.5

Black Crappie

0.3

0.1

9.4-9.4

9.4

0.6-0.6

0.6

Fish Per

Length (Inches)

Weight (Pounds)

Electrofishing-Boat

Catch

Hour

Range

Average

Range

Average

Smallmouth Bass

40.0

95.0

7.9-16.9

11.8

0.2-2.2

0.9

Black Bullhead

25.3

60.0

Shorthead Redhorse

13.7

32.5

White Bass

7.4

17.5

11.8-13.0

12.8

0.7-0.9

0.9

Black Crappie

6.3

15.0

8.7-11.0

9.8

0.4-0.7

0.5

Common Carp

3.2

7.5

Hybrid Sunfish

2.1

5.0

4.7-6.3

5.5

0.1-0.2

0.2

Northern Pike

1.1

2.5

26.8-26.8

26.8

2.8-2.8

2.8

Walleye

1.1

2.5

17.7-17.7

17.7

1.6-1.6

1.6

2017 Survey Year

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Black Bullhead

29.2

7.7

7.9-12.2

10.9

0.5-1.3

0.9

White Bass

20.4

5.4

9.1-14.6

12.2

0.3-1.4

0.8

Common Carp

18.5

4.9

13.0-29.1

19.3

1.5-12.2

4.1

Shorthead Redhorse

14.1

3.7

15.0-19.7

16.6

1.4-3.1

1.9

Walleye

7.6

2.0

8.7-26.8

16.0

0.2-7.2

1.7

Northern Pike

4.2

1.1

18.1-40.9

25.2

1.1-15.2

3.8

River Carpsucker

4.2

1.1

14.2-24.8

18.9

1.5-8.9

4.1

White Sucker

1.5

0.4

15.7-18.9

17.8

1.7-3.3

2.5

Yellow Perch

0.4

0.1

8.7-10.6

9.6

0.3-0.6

0.5

Fish Per

Length (Inches)

Weight (Pounds)

Electrofishing-Boat

Catch

Hour

Range

Average

Range

Average

Smallmouth Bass

40.5

50.0

7.9-16.9

11.9

0.3-2.3

1.0

Common Carp

16.2

20.0

Black Bullhead

13.5

16.7

Black Crappie

13.5

16.7

8.7-10.6

9.8

0.4-0.8

0.6

White Bass

10.8

13.3

9.8-15.0

12.6

0.5-1.4

1.0

Green Sunfish

2.7

3.3

6.3-6.3

6.3

0.2-0.2

0.2

Shorthead Redhorse

2.7

3.3

2016 Survey Year

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Black Bullhead

29.9

8.5

8.3-13.8

10.1

0.3-1.6

0.7

Common Carp

16.8

4.8

13.4-28.7

17.3

1.4-13.4

3.0

White Bass

14.1

4.0

5.9-14.6

11.4

0.1-1.2

0.7

Walleye

12.7

3.6

7.9-27.2

17.5

0.1-7.0

2.4

Shorthead Redhorse

11.7

3.3

13.8-18.1

15.4

1.1-2.8

1.6

Northern Pike

7.6

2.2

19.3-36.6

26.5

1.6-13.1

4.6

River Carpsucker

3.3

0.9

12.6-24.4

20.0

1.1-9.3

4.8

White Sucker

2.3

0.7

15.7-19.3

17.1

1.8-3.3

2.3

Yellow Perch

1.0

0.3

7.1-11.4

9.4

0.2-0.7

0.4

Black Crappie

0.4

0.1

7.9-8.7

8.3

0.3-0.4

0.3

Gizzard Shad

0.2

0.1

9.1-9.1

9.1

0.3-0.3

0.3

Fish Per

Length (Inches)

Weight (Pounds)

Electrofishing-Boat

Catch

Hour

Range

Average

Range

Average

Smallmouth Bass

44.8

86.7

7.9-13.0

10.9

0.3-1.4

0.8

Green Sunfish

29.3

56.7

5.5-6.7

6.3

0.2-0.3

0.2

Shorthead Redhorse

8.6

16.7

Bluegill

6.9

13.3

6.3-8.7

7.2

0.3-0.8

0.4

Common Carp

5.2

10.0

Black Bullhead

3.4

6.7

Black Crappie

1.7

3.3

8.7-8.7

8.7

0.4-0.4

0.4

2015 Survey Year

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Black Bullhead

25.0

5.2

6.3-11.8

9.3

0.1-1.0

0.5

Common Carp

18.6

3.9

9.1-29.5

18.0

0.4-14.0

3.8

Walleye

16.5

3.4

7.1-28.0

15.3

0.1-8.0

1.8

White Bass

12.8

2.7

9.4-15.7

11.9

0.4-1.7

0.8

Northern Pike

11.2

2.3

17.3-35.4

27.2

1.1-10.1

5.2

Shorthead Redhorse

6.4

1.3

9.1-16.9

13.8

0.3-1.8

1.2

Yellow Perch

3.7

0.8

5.9-11.0

9.1

0.1-0.7

0.4

White Sucker

3.2

0.7

15.0-19.3

17.2

1.6-2.9

2.3

River Carpsucker

2.1

0.4

20.1-25.2

22.7

4.4-9.3

6.0

Gizzard Shad

0.5

0.1

15.7-16.9

16.3

1.6-1.8

1.7

Fish Per

Length (Inches)

Weight (Pounds)

Electrofishing-Boat

Catch

Hour

Range

Average

Range

Average

Black Bullhead

46.4

80.0

Smallmouth Bass

17.4

30.0

7.1-14.6

9.9

0.2-1.7

0.6

Green Sunfish

15.9

27.5

5.1-6.3

5.7

0.1-0.2

0.2

Common Carp

11.6

20.0

Bluegill

2.9

5.0

4.7-7.9

6.3

0.1-0.5

0.3

Shorthead Redhorse

2.9

5.0

Black Crappie

1.4

2.5

6.7-6.7

6.7

0.2-0.2

0.2

River Carpsucker

1.4

2.5

Bowman-Haley DamBowman County

Bowman-Haley Dam
Bowman County