Skip to main content
U.S. flag

An official website of the United States government

National Fish Habitat Partnership (NFHP) 90 Meter Buffers of the NHDPlusV1 for the Conterminous United States

March 24, 2017

This geodatabase contains 90 meter buffers of streams within the National Hydrography Dataset Plus Version 1 (NHDPlusV1). These buffers were developed by converting NHDPlusV1 flowlines to a 30m grid, then running a euclidean allocation function in ArcPy to generate buffer zones. For flowlines representing artificial paths within NHD area river polygons, buffers extend from the outside edges (banks) of the polygon outward. The source code for buffer development can be found at