U.S. Geological Survey Montana State Library U.S. Environmental Protection Agency, USDA Forest Service, and other Federal, State and local partners 20121201 vector digital data Helena, Montana Montana State Library https://ftpgeoinfo.msl.mt.gov/Data/Spatial/MSDI/Hydrography/Historic/MT_Hydrography20121201.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. http://usgs-mrs.cr.usgs.gov/stewweb/index.html and http://nhd.usgs.gov/ for detailed infor mation on history, process and attributes. USER GUIDE - http://nhd.usgs.gov/userguide.html 2012 publication date In work Irregular -117 -103 50 44 ISO 19115 Topic Category inlandWaters None hydrography stream river lake pond canal ditch reservoir spring seep swamp marsh artificial path reach code MSDI Montana Spatial Data Infrastructure None 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. Earth Science Information Center, U.S. Geological Survey mailing

507 National Center

Reston VA 20192 US 1 888 ASK USGS ask@usgs.gov 0800-1600 Eastern Time In addition to the address above there are other ESIC offices throughout the country. A full list of these offices is at URL: http://mapping.usgs.gov/esic/esic_index.html See dataset specific metadata. ESRI ArcCatalog 9.3.1.4000 Points, nodes, lines, and areas conform to topological rules. Lines intersect only at nodes, and all nodes anchor the ends of lines. Lines do not overshoot or undershoot other lines where they are supposed to meet. There are no duplicate lines. Lines bound areas and lines identify the areas to the left and right of the lines. Gaps and overlaps among areas do not exist. All areas close. The completeness of the data reflects the content of the sources, which most often are the published USGS topographic quadrangle and/or the USDA Forest Service Primary Base Series (PBS) map. The USGS topographic quadrangle is usually supplemented by Digital Orthophoto Quadrangles (DOQs). Features found on the ground may have been eliminated or generalized on the source map because of scale and legibility constraints. In general, streams longer than one mile (approximately 1.6 kilometers) were collected. Most streams that flow from a lake were collected regardless of their length. Only definite channels were collected so not all swamp/marsh features have stream/rivers delineated through them. Lake/ponds having an area greater than 6 acres were collected. Note, however, that these general rules were applied unevenly among maps during compilation. Reaches codes are defined on all features of type stream/river, canal/ditch, artificial path, coastline, and connector. Waterbody reach codes are defined on all lake/pond and most reservoir features. Names were applied from the GNIS database. Detailed capture conditions are provided for every feature type in the Standards for National Hydrography Dataset available online through http://mapping.usgs.gov/standards/. This statement is generally true for the most common sources of NHD data. Other sources and methods may have been used to create or update NHD data. In some cases, additional information may be found in the NHDMetadata table. The processes used to create and maintain high-resolution NHD data can be found in the table called "NHDMetadata". Because NHD data can be downloaded using several user-defined areas, the process descriptions can vary for each download. The NHDMetadata table contains a list of all the process descriptions that apply to a particular download. These process descriptions are linked using the DuuID to the NHDFeatureToMetadata table which contains the com_ids of all the features within the download. In addition, another table, the NHDSourceCitation, can also be linked through the DuuID to determine the sources used to create or update NHD data. Data downloaded from USGS ftp site of prepackaged state extracts. 20121120 Montana State Library mailing

P.O. Box 201800

Helena MT 59620-1800 US (406) 444-5354 (406) 444-4799 (406) 444-0266 geoinfo@mt.gov 8AM - 5PM, M - F Used the NHD data extract tool to load data into empty Montana State Plane Coordinate System geodatabase. Used USGS tool to rebuild geometric network. 20121123 Flow table populated using tool provided by USGS, BuildFlow. 20121207 Opened GDB, deleted the flowline geometric network. Compacted the geodatabase. 30121123 Vector Entity point 17322 Complete chain 1133425 Complete chain 4220 GT-polygon composed of chains 3935 GT-polygon composed of chains 208456 GT-polygon composed of chains 0 Complete chain 0 Entity point 11139 Entity point 1130433 NHDPoint NHDPoints contain points representing NHD hydrographic landmark features. NHD User Guide - http://nhd.usgs.gov/userguide.html NHDFlowline NHDFlowlines consist of routes that make up a linear surface water drainage network. NHD User Guide - http://nhd.usgs.gov/userguide.html NHDLine NHDLines represent linear NHD hydrographic landmark features used for cartographic representation. NHD User Guide - http://nhd.usgs.gov/userguide.html NHDArea NHDAeas are areal hydrographic landmark features. USGS NHD User Guide - http://nhd.usgs.gov/userguide.html NHDWaterbody NHDWaterbodies contain regions representing areal NHD hydrographic waterbody features. NHD User Guide - http://nhd.usgs.gov/userguide.html NHDAreaEventFC NHDLineEventFC NHDPointEventFC Locations of dams, stream gauges, water quality locations Montana State Library-GeoInfo HYDRO_NET_Junctions Montana State Library mailing

PO BOX 201800

HELENA MT 59620-1800 US 1-406-444-5354 1-406-444-4799 1-406-444-0266 geoinfo@mt.gov 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_Hydrography20121201.zip 20121206 Montana State Library mailing

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HELENA MT 59620-1800 US 1-406-444-5354 1-406-444-4799 1-406-444-0266 geoinfo@mt.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time {a01854eb-810d-4b10-a279-c9561b85f584}