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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This feature class is a polygon representation of rivers and select large streams in North Central Texas. The data includes rivers flowing through the 16 county North Central Texas Council of Governments (NCTCOG) service area.</SPAN></P><P><SPAN>The schema for this feature class was updated in June 2025 to better align with </SPAN><A href="https://www.usgs.gov/national-hydrography" STYLE="text-decoration:underline;"><SPAN>USGS National Hydrography Dataset (NHD)</SPAN></A><SPAN>. Following the schema updates, newer NHD area data was loaded to replace historic data of unknown provenance dating to the 1990s. The NHD data was filter on FTYPE = 46006 (Stream/River: Perennial) and clipped to the 16 county area of interest. IT-GIS joined USGS Geographic Names Information Systems (GNIS) data to the geometry to provide name information for polygons. IT-GIS also split two items (NHD_PERM_ID 131643486 and 131642614) as these had originally included two waterways. Finally, IT-GIS revised the geometry of the West Fork Trinity River to the North and East of Downtown Fort Worth to better reflect channelization efforts since the USGS data was digitized.</SPAN></P><P><SPAN>The National Hydrography Dataset (NHD) represents the water drainage network of the United States with features such as rivers, streams, canals, lakes, ponds, coastline, dams, and streamgages. It has been retired as of October 2023, so updates are not anticipated in the near future. USGS is working to produce new data under the </SPAN><A href="https://www.usgs.gov/3dhp" STYLE="text-decoration:underline;"><SPAN>3D Hydrography Program (3DHP).</SPAN></A></P></DIV></DIV></DIV> |