[Download] A-Mill Hydro Project / Fish Entrainment and Mortality Study

The objective of this fish entrainment and mortality study is to provide the information necessary to estimate potential project operational effects on fisheries resources in the upper Mississippi River, namely the potential for fish to become impinged or entrained at the proposed Project facilities. The general approach utilized to conduct this study is as follows:

1. Describe the physical characteristics of the proposed Project that may influence fish-related turbine entrainment, impingement, and survival;

2. Describe the species composition of the existing fish community;

3. Assess the potential for trashrack exclusion and/or impingement of the target species;

4. Provide monthly turbine entrainment rates from existing empirical data, and utilize these rates to estimate monthly turbine entrainment for the target species using existing hydrologic records or information and proposed Project operations; and

5. Calculate turbine mortality rates for the range of target species’ sizes expected to become entrained, and apply these rates to the monthly entrainment estimates.

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