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Haystack Reservoir and Dam (HAY) Daily Instant Lake/Reservoir Elevation Time Series Data

Published by Bureau of Reclamation | Department of the Interior | Catalog Last Checked: August 01, 2026 at 05:35 AM | Dataset Last Updated: July 30, 2026 at 10:17 AM
Haystack Reservoir and Dam (HAY) instant daily lake/reservoir elevation in feet (ft). Elevation is typically reported as feet above mean sea level (msl) for the location specified datum. Daily refers to one measurement per day.

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