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Generalized average annual yield efficiency (in percent of annual precipitation) for the Black Hills area, South Dakota, water years 1950-98

Published by U.S. Geological Survey | Department of the Interior | Metadata Last Checked: January 27, 2026 | Last Modified: 2020-11-17T00:00:00Z
This dataset provides lines of equal average annual yield efficiency for water years 1950-98 in the Black Hills area of South Dakota and Wyoming.

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