Merrimack River
Pawtucket Dam, Lowell, Massachusetts
Counts as of June 11, 2013

Species

Total Returns to Date

Atlantic Salmon

0

American Shad

8,110

River Herrings *

13,490

Striped Bass

0

Sea Lamprey

70

American Eel

2

*River herring refers collectively to two fish species: blueback herring and alewife

Merrimack River
Amoskeag Dam, Manchester, New Hampshire
No fish passage counts to date

Species

Total Returns to Date

Atlantic Salmon

0

American Shad

0

River Herrings *

0

Striped Bass

0

Sea Lamprey

0

Gizzard Shad

0

*River herring refers collectively to two fish species: blueback herring and alewife

Historic Data
Anadromous Fish Returns
Merrimack River

Year

River Herring *

American Shad

Atlantic Salmon

1982

23

1983

4,794

5,629

114

1984

1,769

5,497

115

1985

23,112

12,793

213

1986

16,265

18,173

103

1987

77,209

16,909

139

1988

361,012

12,359

65

1989

378,973

7,875

84

1990

254,242

6,013

248

1991

379,588

16,098

332

1992

102,166

20,796

199

1993

14,027

8,599

61

1994

88,913

4,349

21

1995

33,425

13,861

34

1996

51

11,322

76

1997

403

22,661

71

1998

1,362

27,891

123

1999

7,898

56,461

185

2000

19,405

72,800

82

2001

1,550

76,717

83

2002

526

54,586

56

2003

10,866

55,620

147

2004

15,051

36,593

129

2005

99

6,382

34

2006

1,257

1,205

91

2007

1,169

15,876

74

2008

108

25,116

119

2009

1,456

23,199

81

2010

518

10,442

85

2011

740

13,835

402

TOTAL

1,791,583

659,661

3,589

All counts were taken at the Essex Dam Fish Lift in Lawrence, Massachusetts
*River Herring refers collectively to two fish species: blueback herring and alewife