Survival estimates - Survival estimates for the passage of juvenile salmonids through Snak

Annual reach survival estimates for smolts in the Snake and Columbia Rivers hydropower system, funded by the Bonneville Power Administration. Smolts are PIT tagged at Lower Granite Dam, with detection data from a trawl in the Columbia River estuary. This information helps the region focus on where passage improvements are needed in the Federal Columbia River Power System.

Use Cases

• Modeling survival rates through specific river reaches based on annual reach survival estimates.
• Analyzing the impact of dam passage on travel time for juvenile salmonids.
• Prioritizing locations for fish passage improvements based on survival estimate trends.
• Correlating survival data with operational changes in the Federal Columbia River Power System.

Strengths

• Annual estimates provide a time series for trend analysis.
• Data collection uses PIT tagging, a standard method for fish tracking.
• Focuses on a critical region for Pacific Northwest salmon conservation.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data is provided in PDF format, which may hinder direct computational analysis.

Provenance

Source

National Oceanic and Atmospheric Administration, Department of Commerce

Collection Method

Smolts are PIT tagged at Lower Granite Dam, combined with tagging by other researchers, and detected by a trawl in the estuary.

Time Range

Annual estimates.

Freshness

Last updated 2026-03-14 22:54:27.012466; freshness should be verified.

Geography

Snake and Columbia Rivers, specifically reaches through the hydropower system to below Bonneville Dam.