U.S. Geological Survey Montana State Library U.S. Environmental Protection Agency, USDA Forest Service, and other Federal, State and local partners 20131209 vector digital data Helena, Montana Montana State Library https://ftpgeoinfo.msl.mt.gov/Data/Spatial/MSDI/Hydrography/Historic/MT_Hydrography20131209.zip https://mslservices.mt.gov/Geographic_Information/Data/DataList/datalist_Details.aspx?did={db6c41bd-1f29-48ab-b4aa-2c1890f317e6} 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. The NHD is a national framework for assigning reach addresses to water-related entities, such as industrial discharges, drinking water supplies, fish habitat areas, wild and scenic rivers. Reach addresses establish the locations of these entities relative to one another within the NHD surface water drainage network, much like addresses on streets. Once linked to the NHD by their reach addresses, the upstream/downstream relationships of these water-related entities--and any associated information about them--can be analyzed using software tools ranging from spreadsheets to geographic information systems (GIS). GIS can also be used to combine NHD-based network analysis with other data layers, such as soils, land use and population, to help understand and display their respective effects upon one another. Furthermore, because the NHD provides a nationally consistent framework for addressing and analysis, water-related information linked to reach addresses by one organization (national, state, local) can be shared with other organizations and easily integrated into many different types of applications to the benefit of all. 20131209 Date Published In work Continually -117 -103 50 44 None inlandWaters hydrography stream river lake pond canal ditch reservoir spring seep swamp marsh artificial path reach code MSDI Montana Spatial Data Infrastructure Montana None DISCLAIMER: The Montana State Library Geographic Information Services provides this product/service for informational purposes only. The Library did not produce it for, nor is it suitable for legal, engineering, or surveying purposes. Consumers of this information should review or consult the primary data and information sources to ascertain the viability of the information for their purposes. The Library provides these data in good faith but does not represent or warrant its accuracy, adequacy, or completeness. In no event shall the Library be liable for any incorrect results or analysis; any direct, indirect, special, or consequential damages to any party; or any lost profits arising out of or in connection with the use or the inability to use the data or the services provided. The Library makes these data and services available as a convenience to the public, and for no other purpose. The Library reserves the right to change or revise published data and/or services at any time. Montana State Library mailing

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Helena MT 59620-0113 406-444-5354 Montana Relay 711 406-444-0266 See dataset feature level metadata (NHD Metadata and NHD Source Citation tables) NHDPoint NHDPoints contain points representing NHD hydrographic landmark features.Field Name NHD User Guide - http://nhd.usgs.gov/userguide.html Ftype NHDPoint: Inundation Area (403); SeaOcean (445); Submerged Stream (461); CanalDitch (336); Levee (568); StreamRiver (460); Hazard Zone (373); Wash (484); BayInlet (312); Rapids (431); Foreshore (364); Bridge (318); Area of Complex Channels (537); Lock Chamber (398); Special Use Zone (454); Spillway (455); Flume (362); DamWeir (343); Water IntakeOutflow (485); Area to be Submerged (307) NHD Model Diagram v 2.1 NHDFlowline NHDFlowlines consist of routes that make up a linear surface water drainage network. NHD User Guide - http://nhd.usgs.gov/userguide.html Ftype Underground Conduit (420) StreamRiver (460) Pipeline (428) ArtificialPath (558) CanalDitch (336) Connector (334) Coastline (566) NHD Model Diagram v2.1 NHDLine NHDLines represent linear NHD hydrographic landmark features used for cartographic representation. NHD User Guide - http://nhd.usgs.gov/userguide.html Ftype Tunnel (478); Bridge (318); Lock Chamber (398); Wall (483); Sounding Datum Line (503); Levee (568); Gate (369); Flume (362); Waterfall (487); Reef (434); Special Use Zone Limit (533); SinkRise (450); Rapids (431); DamWeir (343); Nonearthen Shore (411) NHD Model Diagram V2.1 NHDArea NHDAeas are areal hydrographic landmark features. USGS NHD User Guide - http://nhd.usgs.gov/userguide.html Ftype Inundation Area (403); SeaOcean (445); Submerged Stream (461); CanalDitch (336); Levee (568); StreamRiver (460); Hazard Zone (373); Wash (484); BayInlet (312); Rapids (431); Foreshore (364); Bridge (318); Area of Complex Channels (537); Lock Chamber (398); Special Use Zone (454); Spillway (455); Flume (362); DamWeir (343); Water IntakeOutflow (485); Area to be Submerged (307) NHD Model Diagram v 2.1 NHDWaterbody NHDWaterbodies contain regions representing areal NHD hydrographic waterbody features. NHD User Guide - http://nhd.usgs.gov/userguide.html Ftype Playa (361); Ice Mass (378); SwampMarsh (466); Estuary (493); LakePond (390); Reservoir (436) NHD Model Diagram v 2.1 NHDAreaEventFC Area event must be tied to a NHDWaterbody. They cannot be linked to a linear or point feature. Area events are built into the NHD Model but are not accepted back into the National Database. They are meant to be used on an individual basis. NHD User Guide - http://nhd.usgs.gov/userguide.html NHDLineEventFC Linear Events are used to attach information about a flowline segment to the NHD. Linear events are built into the NHD Model but are not accepted back into the National Database. They are meant to be used on an individual basis. They also need a from and to location and a reachcode. NHD User Guide - http://nhd.usgs.gov/userguide.html NHDPointEventFC Point events are tied to a specific location on a stream network by a reachcode and a measure. While several types of Point Events are accepted back into the National Database, additional Point Event Types may be used on an individual basis. Locations of dams, stream gauges, water quality locations NHD User Guide - http://nhd.usgs.gov/userguide.html HYDRO_NET_Junctions The feature classes called Hydro Net and Hydro Net Junction contain the geometric network for the Hydrography Dataset with assigned flow direction for flowline features. Hydro_Net is an ESRI utility network, and Hydro Net Junction contains points for all flowline start and end nodes. These are produced when the NHD is extracted from the National Database and the network is given the name Hydro Net. NHD User Guide - http://nhd.usgs.gov/userguide.html ExternalCrosswalk (table) Contains associations of Permanent _Identifiers to external source identifiers (1:M) NHD Schema Model 2.1 Diagram NHD FCode (table) Five-digit integer value comprised of the feature type and the combinations of characteristcs and values NHD Schema Model 2.1 Diagram NHDFeatureToMetadata (table) In the NHD geodatamodel, feature-level metadata information is included in three tables: NHDFeatureToMetadata, NHDMetdata, and NHDSourceCitation. The NHDFeatureToMetadata table links the features to their instances of metadata. The NHDMetadata table contains the general metadata characteristics for each collection of features. The NHDSourceCitation table details the source associated with each metadata instance. NHD Schema Model 2.1 Diagram NHDMetadata (table) In the NHD geodatamodel, feature-level metadata information is included in three tables: NHDFeatureToMetadata, NHDMetdata, and NHDSourceCitation. The NHDFeatureToMetadata table links the features to their instances of metadata. The NHDMetadata table contains the general metadata characteristics for each collection of features. The NHDSourceCitation table details the source associated with each metadata instance. NHD Schema Model 2.1 Diagram NHDSourceCitation (table) In the NHD geodatamodel, feature-level metadata information is included in three tables: NHDFeatureToMetadata, NHDMetdata, and NHDSourceCitation. The NHDFeatureToMetadata table links the features to their instances of metadata. The NHDMetadata table contains the general metadata characteristics for each collection of features. The NHDSourceCitation table details the source associated with each metadata instance NHD Schema Model 2.1 Diagram NHDFlow (table) the NHDFlow table provides feature to feature flow information for the NHDFlowline feature class. This flow table data is redundant with the network flow navigation available in the geometric network in both the personal and file geodatabase downloads. The flow table is intended to support interoperability with applications outside of ESRI geodatabase solutions. NHD User Guide NHDFlowlineVAA (table) hThe NHD Value Added Attributes are computed from the NHDFlow table and assigned to each drainage feature in the stream network. The values currently are not populated but will be in the future; they are essential to NHD Plus. NHD User Guide NHD Processing Parameters (table) This table lists the schema and the version of the master NHD database that was used to generate extracted NHD data. NHD User Guide NHD reach cross reference (table) This table provides information that tracks changes, over time, to reach codes. NHD User Guide NHD reachcode maintenance (table) Table used to maintain links for backward compatibility with FOD-based systems. NHD Schema Model 2.1 Diagram NHD Status (table) NHDStatus is used to track data changes for transaction uploads to the central repository. This table is only populated during editing. NHD User Guide NHD Vertical Relationship (table) Used for features that cross but do not exchange flow, i.e rivers and canals. NHD User Guide HYDRO_NET HYDRO_NET_Junctions NHD User Guide Montana State Library mailing

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Helena MT 59620-0113 406-444-5354 Montana Relay 711 406-444-0266 Downloadable Data DISCLAIMER: The Montana State Library Geographic Information Services provides this product/service for informational purposes only. The Library did not produce it for, nor is it suitable for legal, engineering, or surveying purposes. Consumers of this information should review or consult the primary data and information sources to ascertain the viability of the information for their purposes. The Library provides these data in good faith but does not represent or warrant its accuracy, adequacy, or completeness. In no event shall the Library be liable for any incorrect results or analysis; any direct, indirect, special, or consequential damages to any party; or any lost profits arising out of or in connection with the use or the inability to use the data or the services provided. The Library makes these data and services available as a convenience to the public, and for no other purpose. The Library reserves the right to change or revise published data and/or services at any time. ArcGIS Geodatabase https://ftpgeoinfo.msl.mt.gov/Data/Spatial/MSDI/Hydrography/Historic/MT_Hydrography20131209.zip 20140130 Montana State Library mailing

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Helena Montana 59620 406.444.5354 geoinfo@mt.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time {9391f1fe-9413-4fa1-8476-894dbf166a17}