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A crosswalk table between NHDPlus version 2.1 flowlines (using the unique field COMID) and the Watershed Boundary Dataset (WBD) 12-digit-hydrologic units (HU-12) is provided for the 48 contiguous...
Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: August 01, 2026 at 05:27 AM -
This dataset consists of the individual watersheds/subwatersheds that contain water features that flow or contribute to those that flow directly into SECN parks. The watersheds/subwatersheds are...
Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: August 01, 2026 at 03:57 AM -
This dataset contains custom drainage basin polygons that are composed of the various watersheds (HUC-10) or subwatersheds (HUC-12) that contain water features that flow or contribute to those...
Search relevance: 1.00 | Views last month: 0 | Catalog Last Checked: August 01, 2026 at 03:57 AM
