St. Stephen Fish Lift

1987 - 2014 Graphs of Blueback herring and American shad
that have passed through the St. Stephen's Fish Lift

Blueback Herring

Figure 1. Y –axis represent the amount of Blueback herring passing during the year. 0.4 =400,000, 0.8=800,000, 1.2= 1,200,000, 1.6=1,600,000, 2.0= 2,000,000.

American Shad Graph

Figure 2. Y-axis represents the amount of American Shad passing during the year. 0.2=200,000 0.4=400,000, 0.6=600,000, 0.8=800,000.

Fish passage through St. Stephen Fish Lift is variable from year-to-year. This variability is due to environmental factors (the amount of river flow, water temperature, and natural variations in population numbers) and man-made factors (construction and maintenance of the mechanics of the fish lift). From 2012-2014, the operating season was shortened due to major rehabilitation of the hydraulics and structural components of the Fish Lift.

Biologists use multi-year trends and averages to assess anadromous fish runs at St. Stephen Fish Lift to account for the many factors that affect fish passage.

Return to the St. Stephen Fish Lift