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Reclamation Region Boundaries

Published by Bureau of Reclamation | Department of the Interior | Metadata Last Checked: January 06, 2026 | Last Modified: 2020-10-23T22:42:06Z
This dataset represents the Bureau of Reclamation's Region Boundaries prior to the establishment of Department of Interior Unified Region Boundaries in 2019. NOTE: These boundaries are for general reference only and are no longer represent official administrative boundaries. The Regions included in this representation are the Pacific Northwest, Upper Colorado, Lower Colorado, Great Plains and Mid-Pacific Regions. These boundaries are superseded by Department of Interior Unified Region Boundaries.

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