Fish Spill Projections 2016-2021_Jan. 04 2016 Updated 1/7/2016
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Updated January 4, 2016 Best Estimates of Rocky Reach and Rock Island Fish Spill Requirements, 2016-2021 As Determined by HCP Fish Survival Study Results (Spill percentages are a proportion of daily-average projected river flow at the Project) 2016 Rocky Reach Spring 0% fish spill (April-May) No juvenile salmon survival studies Rocky Reach Summer - 9% fish spill (spill start approx 6/3 - end approx 8/20) - No juvenile salmon survival studies Rock Island Spring - 10% fish spill (spill start approx 4/17 - spill end approx 6/4) No juvenile salmon survival studies Rock Island Summer - 20% fish spill (spill start approx 6/5 - end approx 8/20) - No juvenile salmon survival studies 2017 Rocky Reach Spring - 0% fish spill (April-May) - No juvenile salmon survival studies Rocky Reach Summer - 9% fish spill (start approx 6/3 - end approx 8/20) - Possible survival study (June-July) for summer Chinook smolts @ 9% spill level Rock Island Spring - 10% fish spill (start approx 4/17 - end approx 6/4) - No juvenile salmon survival studies Rock Island Summer 20% fish spill (start approx 6/5 - end approx 8/20) Possible survival study (June-July) for summer Chinook smolts @ 20% spill level 2018 Mosey-Hemstrom 1/4/16 Page Rocky Reach Summer - 9% fish spill (start approx 6/3 - end approx 8/20) - Possible survival study (June-July) for summer Chinook smolts @ 9% spill level 1 Rocky Reach Spring - 0% fish spill (April-May) - No juvenile salmon survival studies Rock Island Spring - 10% fish spill (start approx 4/17 - end approx 6/4) - No juvenile salmon survival studies Rock Island Summer - 20% fish spill (start approx 6/5 - end approx 8/20) - Possible survival study (June-July) for summer Chinook smolts @ 20% spill level 2019 Rocky Reach Spring 0% fish spill (April-May) - No juvenile salmon survival studies Rocky Reach Summer - 9% fish spill (start approx 6/3 - end approx 8/20) - Possible survival study (June-July) for summer Chinook smolts @ 9% spill level Rock Island Spring - 10% fish spill (start approx 4/17 - end approx 6/4) - No juvenile salmon survival studies Rock Island Summer - 20% fish spill (start approx 6/5 - end approx 8/20) - Possible survival study (June-July) for summer Chinook smolts @ 9% spill level 2020 Rocky Reach Spring 0% fish spill (April-May) Possible 10-year HCP study to confirm spring juvenile passage survival @ 0% spill level (otherwise, 2021) Rocky Reach Summer - 9% fish spill (start approx 6/3 - end approx 8/20) - Possible survival study (June-July) for summer Chinook smolts @ 9% spill level Rock Island Spring - 10% fish spill (start approx 4/17 - end approx 6/4) - Firm HCP 10-year check-in study to confirm juvenile salmon passage survival @ 10% spill level Page 2 Rock Island Summer - 20% fish spill (start approx 6/5 - end approx 8/20) - Possible survival study (June-July) for summer Chinook smolts @ 20% spill. Mosey-Hemstrom 1/4/16 2021 Rocky Reach Spring 0% fish spill (April-May) - HCP 10-year check-in study to confirm spring juvenile salmon passage survival @ 0% spill level (if not in 2020) Rocky Reach Summer - 9% fish spill start approx 6/3 - end approx 8/20) - Possible survival study (June-July) for summer Chinook smolts @ 9% spill level Rock Island Spring - 10% fish spill (start approx 4/17 - end approx 6/4) - Repeat HCP check-in juvenile survival study @ 10% (only if survival standard unmet in 2020 study) Rock Island Summer - 20% fish spill (start approx 6/5 - end approx 8/20) - Possible survival study (June-July) for summer Chinook smolts @ 20% spill level Table 1. Rocky Reach Best Estimates for Fish Spill Level, Dates, and Survival Studies, 2016-2021 Spring Best Estimate Summer Best Estimate Spring Fish Study 2016 0% Firm 4/20 - 6/3 9% Firm Est. 6/3 - 8/20 None 2017 0% Firm 4/20-6/3 9% Firm Est. 6/3 - 8/20 None 2018 0% Firm 4/20-6/3 9% Firm Est. 6/3 - 8/20 2019 0% Firm 4/20-6/3 9% Firm Est. 6/3 - 8/20 None Possible Summer Chinook 2020 0% Firm 4/20-6/3 9% Firm Est. 6/3 - 8/20 Possible Possible Summer Chinook 2021 0% Firm 4/20-6/3 9% Firm Est. 6/3 - 8/20 None HCP spring passage survival study None Possible Summer Chinook Possible Summer Chinook Possible Summer Chinook Page 3 Year Summer Fish Study Mosey-Hemstrom 1/4/16 Table 2. Rock Island Best Estimates for Fish Spill Level, Dates, and Survival Studies, 2016-2021 Spring Best Estimate Summer Best Estimate Spring Fish Study Summer Fish Study 2016 10% Firm 4/17 - 6/4 20% Firm Est. 6/5 - 8/20 None None 2017 10% Firm 4/17 - 6/4 20% Firm Est. 6/5 - 8/20 None Possible Summer Chinook 2018 10% Firm 4/17 - 6/4 20% Firm Est. 6/5 - 8/20 None Possible Summer Chinook 2019 10% Firm 4/17 - 6/4 20% Firm Est. 6/5 - 8/20 None Possible Summer Chinook 2020 10% Firm 4/17 - 6/4 20% Firm Est. 6/5 - 8/20 HCP spring passage survival study Possible Summer Chinook 2021 10% Firm 4/17 - 6/4 20% Firm Est. 6/5 - 8/20 Possible second HCP spring passage survival study Possible Summer Chinook Page 4 Year Mosey-Hemstrom 1/4/16