HUC12 Boundaries NBEP2017 (shapefile)

Narragansett Bay, Little Narragansett Bay, and the Southwest Coastal Ponds are the three estuarine study areas under the purview of the Narragansett Bay Estuary Program. This dataset represents the U.S. Geological Survey Watershed Boundary Dataset (WBD) 12-digit hydrologic units (HUC12) that drain, directly and indirectly, to the three estuaries. This dataset was created for the 2017 State of Narragansett Bay and Its Watershed Technical Report (nbep.org) and is intended for use in general planning, GIS analysis, and mapping at watershed and subwatershed scales.