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1. NHD Flowline

2004. U.S. Geological Survey in cooperation with U.S. Environmental Protection Agency, USDA Forest Service, and other Federal, State and local partners (see dataset specific metadata under Data_Set_Credit for details). The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that m... Reston (va.). U.s. Geological Survey.

2. SCGISDB2_BASE_HYD_USGSSTRM

2003. CDF, USGS, Sonoma Ecology Center: Compiled by County of Sonoma ISD GIS Central. Compiled by Sonoma County GIS group. Polyline layer only. The base line work is compiled from the CDF FRAP (California Department of Forestry Fir... Santa Rosa (Calif.). County Of Sonoma Gis Central.