The National Map Hydrography Content

• Area of Complex Channels

• Area to be Submerged

• Artificial Path

• Bay or Inlet

• Bridge

• Canal or Ditch

• Canal or Ditch, aqueduct

• Canal or Ditch, stormwater

• Coastline

• Connector

• Dam or Weir

• Dam or Weir, earthen construction material

• Dam or Weir, nonearthen construction material

• Dam, event data linked to the National Hydrography Dataset

• Drainageway

• Estuary

• Flow Alteration Addition, event data linked to the National Hydrography Dataset

• Flow Alteration Removal, event data linked to the National Hydrography Dataset

• Flow Alteration Unknown, event data linked to the National Hydrography Dataset

• Flume

• Foreshore

• Gaging Station

• Gaging Station, active status, continuous record

• Gate

• Hydrologic Unit Outlet, event data linked to the National Hydrography Dataset

• Ice Mass

• Inundation Area

• Inundation Area, controlled status

• Inundation Area, controlled status, flood elevation stage

• Inundation Area, not controlled status

• Lake or Pond

• Lake or Pond, intermittent hydrographic category

• Lake or Pond, intermittent hydrographic category, date of photography stage

• Lake or Pond, intermittent hydrographic category, high water elevation stage

• Lake or Pond, perennial hydrographic category

• Lake or Pond, perennial hydrographic category, average water elevation stage

• Lake or Pond, perennial hydrographic category, date of photography stage

• Lake or Pond, perennial hydrographic category, normal pool stage

• Lake or Pond, perennial hydrographic category, spillway elevation stage

• Levee

• Lock Chamber

• NHDPlus Burn Line Event

• NHDPlus Burn Waterbody

• NHDPlus Catchment

• NHDPlus LandSea

• NHDPlus SinkNHDPlus Wall

• Non-Contributing Drainage Area

• Non-Contributing Drainage Line

• Nonearthen Shore

• NWIS Drainage Area

• NWIS Drainage Line

• Pipeline

• Pipeline, aqueduct

• Pipeline, aqueduct, at or near surface

• Pipeline, aqueduct, elevated

• Pipeline, aqueduct, underground

• Pipeline, aqueduct, underwater

• Pipeline, penstock

• Pipeline, penstock, at or near surface

• Pipeline, penstock, elevated

• Pipeline, penstock, underground

• Pipeline, penstock, underwater

• Pipeline, siphon

• Pipeline, stormwater

• Pipeline, stormwater, at or near surface

• Pipeline, stormwater, elevated

• Pipeline, stormwater, underground

• Pipeline, stormwater, underwater

• Playa

• Rapids

• Reef

• Reservoir

• Reservoir, aquaculture

• Reservoir, cooling pond

• Reservoir, decorative pool

• Reservoir, disposal

• Reservoir, disposal, earthen material construction

• Reservoir, disposal, nonearthen material construction

• Reservoir, earthen material construction

• Reservoir, evaporator

• Reservoir, evaporator, earthen construction material

• Reservoir, filtration pond

• Reservoir, nonearthen material construction

• Reservoir, settling pond

• Reservoir, sewage treatment pond

• Reservoir, swimming pool

• Reservoir, tailings pond

• Reservoir, tailings pond, earthen construction material

• Reservoir, treatment

• Reservoir, water storage

• Reservoir, water storage, earthen construction material, intermittent

• Reservoir, water storage, earthen construction material, perennial

• Reservoir, water storage, nonearthen construction material

• Reservoir, water storage, perennial

• Rock

• Rock, above water

• Rock, underwater

• Sea or Ocean

• Sink or Rise, estevelle, bidirectional flow

• Sink or Rise, rise, out of ground flow

• Sink or Rise, sink, into ground flow

• Sink or Rise, unknown flow

• Sounding Datum Line

• Sounding Datum Line, approximate positional accuracy

• Sounding Datum Line, definite positional accuracy

• Spillway

• Spring or Seep

• Stream or River

• Stream or River, ephemeral

• Stream or River, intermittent

• Stream or River, perennial

• Streamgage, event data linked to the National Hydrography Dataset, active streamgage, continuous record

• Streamgage, event data linked to the National Hydrography Dataset, active streamgage, inactive record

• Streamgage, event data linked to the National Hydrography Dataset, active streamgage, partial record

• Submerged Stream

• Swamp or Marsh

• Swamp or Marsh, intermittent

• Swamp or Marsh, perennial

• Tunnel

• Underground Conduit

• Underground Conduit, approximate positional accuracy

• Underground Conduit, definite positional accuracy

• Underground Conduit, indefinite positional accuracy

• Wall

• Wash

• Water Intake or Outflow

• Water Quality Station, event data linked to the National Hydrography Dataset

• Waterfall

• Watershed Boundary, 10-digit hydrologic unit

• Watershed Boundary, 12-digit hydrologic unit

• Watershed Boundary, 14-digit hydrologic unit

• Watershed Boundary, 16-digit hydrologic unit

• Watershed Boundary, 2-digit hydrologic unit

• Watershed Boundary, 4-digit hydrologic unit

• Watershed Boundary, 6-digit hydrologic unit

• Watershed Boundary, 8-digit hydrologic unit

• Watershed Boundary, line

• Well

For comments or questions about the The National Map Hydrography Content, please email:  tnm_help@usgs.gov.