Description: The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water bodies. Reaches are also defined on waterbodies and the approximate shorelines of the Great Lakes, the Atlantic and Pacific Oceans and the Gulf of Mexico. The NHD also incorporates the National Spatial Data Infrastructure framework criteria established by the Federal Geographic Data Committee.
Description: This data contains approximate alignments of regional stormwater drainage facilities, water quality and conservation projects and other associated projects budgeted in the District's Five Year Capital Improvement Plan. Relevant information such as the project's zone number, supervisorial district, and project number are included.
Definition Expression: N/A
Copyright Text: RCFC-GIS merged CIP data from Planning and Desgin and Construction to create a final CIP feature class 11/20/18.
Updated: 11/19/2018 by RCFC – Planning utilizing project descriptions provided by District staff, Riverside County, Cities within the incorporated areas, Water Districts and several external agencies such as USACOE, JCSD and MJPA.