Sworinger

About Sworinger

Sworinger is a dam in Lassen, California. The dam is owned by John Estill And Lani Estill (private). It impounds the Tr Silver Creek near N/a.

The dam stands 35 feet tall and stretches 1,055 feet across, creates a reservoir covering 291 acres, and has a maximum storage capacity of 4,050 acre-feet. Completed in 1961, the structure is well into its service life at over 50 years old.

This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 11/04/2025.

At 35 feet, this dam is taller than 82% of dams nationwide.

Living Downstream

If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The California dam safety program can provide more specific information about emergency planning for this structure.

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