Description:Data Source: USFS, BLM, FWS, and NPS in cooperation with the National Atlas of the United States.
Data Vintage: October 2009.
Useful Info: The geographic extent of this data is the entire U.S. Stream segment data is compiled from a variety of sources. Segments designated through 2000 were compiled at a scale of 1:2,000,000. New segments added to the system since 2000 were compiled at a scale of 1:24,000. All data can be viewed at scales showing approximately the area of one-half a typical western state on your screen. Segments designated since 2000 can be viewed at scales showing areas smaller than a typical western national forest on your screen.