Fish Data

Fish Passage Queries

Adult Passage Counts

Adult passage count query for Prosser Dam, Roza Dam, Lyle Falls and Castile Falls

Adult Passage Counts Detail

Detailed adult passage count query for Prosser Dam, Roza Dam, Lyle Falls and Castile Falls 

Adult Passage Graphs

Interactive graphs of annual adult passage for Prosser Dam, Roza Dam, Lyle Falls and Castile Falls

Below is a general summarization of fish count data. Click on the links above for more details.

Note: Lyle Falls trap counts only represent a subsample of the total run. See annual reports for population estimates.