Attachment 38 to GNRO-2012/00039 Attachment 38 to GNRO-2012/00039 ENSR. 2007. Impingement Mortality and Entrainment Characterization Study (IMECS), Entergy -Waterford 3. December 2007. Impingement Mortality and Entrainment Characterization Study (IMECS) Entergy - Waterford 3 ENSR Corporation December 2007 Document No.: 00970-027-300 ENSR Prepared for: Entergy Operations, Inc. Impingement Mortality and Entrainment Characterization Study (IMECS) Entergy - Louisiana -A' • ;"- "x I'•', •' .. ' "" / Prepared By: Kurtis Schlicht Reviewed By: Robert D. Carpenter ENSR Corporation December 2007 Document No.: 00970-027-300 ENSR ,"v ENSR I A\1:.4F!! V Contents Executive Sum m ary .......................................................................................................................................... vi 1.0 Introduction ............................................................................................................................................... 1-1 1.1 Statement bf IMECS Goals ...................................................................................... ...... 1-1 1.1.1 Strategy Relative to the 2nd Circuit Court Decision and EPA Suspension of the Rule.. 1-1 1.1.2 Requirements from the Suspended Rule ......................................................................... 1-1 1.1.3 Strategy to Address the Rule's Requirements .................................................................. 1-2 1.1.4 Support Issues Specific to Compliance Alternative .......................................................... 1-2 1.2 Review of Facility and COS ............................................................................................................ 1-3 1.3 Document Organization .................................................................................................................. 1-4 2.0 Habitat Review .......................................................................................................................................... 2-1 2.1 Plant Locations ................................................................................................................................ 2-2 2.2 Habitat Summary ............................................................................................................................. 2-3 2.2.1 W aterford 3 ........................................................................................................................ 2-3 2.2.2 W aterford 1 & 2 .................................................................................................................. 2-4 2.2.3 W illow Glen .............................................................................................................. 2-4 2.2.4 Baxter W ilson ..................................................................................................................... 2-5 2.2.5 Ninem ile ............................................................................................................................. 2-6 2.2.6 Little Gypsy ........................................................................................................................ 2-6 2.2.7 Gerald Andrus .................................................................................................................... 2-7 2 .2 .8 R itch ie ................................................................................................................................ 2 -7 3.0 Review of Data .......................................................................................................................................... 3.1 3.1 Literature Review ............................................................................................................................. 3-1 3.1.1 The existing LMR data are sufficient to characterize the aquatic community, impingement mortality (IM) rates and seasonality of impingement ................................ 3-1 3.1.2 Life Stage and Taxonomy Data for all Species in the LM R ............................................. 3-4 3.1.3 Fish and Other Aquatic Species Distribution ................................................................ 3-4 3.1.4 Abundance of Species Most Com monly Impinged .......................................................... 3-4 3.1.5 Impingement rates at Waterford 3 are estimated to be low and IM will have no long lasting consequences to the populations of impinged fish ....................................... 3-5 3.2 General Trends Relevant to Plant, Compliance Strategy .............................................................. 3-5 3.2.1 Overall Trends ................................................................................................................... 3-5 3.2.2 Timing and M ethods .......................................................................................................... 3-7 3.2.3 Rates of IM......................................................................................................................... 3-7 3.3 Characterization of Susceptible Species and Life Stages ............................................................. 3-7 3.3.1 Overview of LMR Fisheries ............................................................................................... 3-7 3.3.2 Spatial Differences in the LMR Fisheries .......................................................................... 3-9 Repot No. 00970-027-300 ji Deoem-rder 2007 ENSR r 3.3.3 Dom inant Species Im pinged in the LM R ........................................................................ 3-15 3.3.4 Threatened and Endangered Species ............................................................................ 3-19 3.3.5 Other Considerations that Might Drive Additional Concerns .......................................... 3-21 3.4 M ethods of Extrapolation from Historical Data ............................................................................. 3-21 3.4.1 Review of Data Relevance .............................................................................................. 3-21 3.4.2 Method of Extrapolation ................................................................................................... 3-24 3.4.3 Discussion of Uncertainty ................................................................................................ 3-24 4,0 Data Interpretation ................................................................................................................................... 4-1 4.1 Current Im pingem ent Study Performed at the Waterford 1&2 Plant ............................................. 4-1 4.2 Overview of Relevant Studies ......................................................................................................... 4-1 4.2.1 Taxonom ic Identifications ............................................................................................. 4-1 4.2.2 Characterization of Life Stages ......................................................................................... 4-2 4.2.3 Documentations of Current IM and E Rates ..................................................................... 4-5 4.3 Definition of Perform ance Basis ..................................................................................................... 4-6 4.3.1 Target Species ................................................................................................................... 4-6 4.3.2 Num bers vs. Biomass ........................................................................................................ 4-7 4.4 Estimation of Current Performance Relative to the Calculation Baseline ................................... 4-11 4.4.1 Review of CWIS Structure and O peration ...................................................................... 4-11 4.4.2 Im pingem ent M ortality ..................................................................................................... 4- 11 5.0 Sum mary and Conclusions .................................................................................................................... 5-1 6.0 References ................................................................................................................................................ 6-1 List of Appendices Appendix A Literature Review Appendix B Detailed Rare, Threatened and Endangered Species Information Appendix C Comparative Analysis of Impingement Mortality Studies Report Report No. 00970-027-300 iii December 2007 ENSR .. List of Tables Table 1. Description of Aquatic Habitats in the Lower Mississippi River Table 2. Summary of Historical Impingement Studies at Entergy's Power Plants Table 3. Summary of Species Dominating Historic Impingement Table 4. Length, Weight, Survival, and Swimming Speed Characterisbcs for Species Commonly Impinged at Entergy's Power Plants Table 5. Potential for Threatened and Endangered Species to Inhabit the Waters in Vicinity of Entergy's Power Plants Located on the Lower Mississippi River Table 6 Combined Lists of Species Impinged at Waterford 1 & 2, Willow Glen, and Baxter Wilson Table 7 Results of Ambient Fisheries Assessment of Grand Gulf and Waterford 3 Plants Table 8 Mean Sizes of Fish Impinged at Power Plants Located on the Lower Mississippi River Table 9 Density and Abundance Estimates for Rivers Across the World List of Figures Figure 1. Location Map for Entergy Plants Located on the Lower Mississippi River Figure 2. Aquatic Habitat Map for Waterford 3 Figure 3. Aquatic Habitat Map for Waterford 1 & 2 Figure 4. Aquatic Habitat Map for