University of Washington

Hatchery Chinook Loss Tables of Confirmed and Unconfirmed CWT and CWT Releases WY2026

Data Courtesy of CDFW, Bay Delta Region
Juvenile Salvage & Loss Queries

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Confirmed Hatchery Loss

  1. Number released with the adipose-fin clipped and a coded-wire tag (CWT).
  2. % Loss of Number Released = (Confirmed Loss/Number Released)*100.
  3. Chinook outside of the length-at-date criteria (Delta model) are not reported.

Unconfirmed Hatchery Loss

Unconfirmed Hatchery (Adipose-Fin Clipped) Chinook Salmon Loss at the SWP & CVP Delta Fish Facitilities, 10/1/2025 to 9/30/2026 , Data through 2026-09-30
SWP:  8.660
CVP:  10.688
  1. Adipose-fin clipped Chinook was observed during fish count, but tag code could not be determined (e.g., damaged tag, lost tag, no tag, or Chinook released).

CWT Hatchery Releases of Interest

Query Notes