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.
FCODE: Coded Values:
[53700: Area of Complex Channels]
ID: 398
Name: Lock Chamber
Domains:
RESOLUTION: Inherited
ELEVATION: Inherited
FCODE: Coded Values:
[39800: Lock Chamber]
ID: 454
Name: Special Use Zone
Domains:
RESOLUTION: Inherited
ELEVATION: Inherited
FCODE: Coded Values:
[45400: Special Use Zone]
,
[45402: Special Use Zone: Special Use Zone Type = Dump Site; Operational Status = Abandoned]
,
[45401: Special Use Zone: Special Use Zone Type = Dump Site; Operational Status = Operational]
, ...2 more...
ID: 455
Name: Spillway
Domains:
RESOLUTION: Inherited
ELEVATION: Inherited
FCODE: Coded Values:
[45500: Spillway]
ID: 362
Name: Flume
Domains:
RESOLUTION: Inherited
ELEVATION: Inherited
FCODE: Coded Values:
[36200: Flume]
ID: 343
Name: DamWeir
Domains:
RESOLUTION: Inherited
ELEVATION: Inherited
FCODE: Coded Values:
[34300: Dam/Weir]
,
[34305: Dam/Weir: Construction Material = Earthen]
,
[34306: Dam/Weir: Construction Material = Nonearthen]
ID: 485
Name: Water IntakeOutflow
Domains:
RESOLUTION: Inherited
ELEVATION: Inherited
FCODE: Coded Values:
[48500: Water Intake/Outflow]
ID: 307
Name: Area to be Submerged
Domains:
RESOLUTION: Inherited
ELEVATION: Inherited
FCODE: Coded Values:
[30700: Area to be Submerged]