Montana State Library 19910309 map Helena, Montana Montana State Library The former name of this datasest was "hd52". https://mslservices.mt.gov/Geographic_Information/Data/DataList/datalist_Details.aspx?did={0077A7D3-F6C3-4D08-9837-410E79A12FCC} Sub-basin (4th-code, or 8-digit) level, hydrologic units of Montana. These data were received by the State Library from the Portland Office of the Bonneville Power Administration in 1991. We believe the data were developed from 1:2,000,000 scale maps in the 1972 National Atlas of the United States. 1972 Publication Date -115.613701 -103.611900 49.0346985 44.2433014 -116.0748825073,49.02441787719,-116.0513381958,47.93949127197,-115.7472457885,47.45859146118,-114.6641998291,46.60823059082,-114.424659729,46.61886978149,-114.5483016967,45.60388565063,-114.3186950683,45.43321228027,-113.9458312988,45.58434677124,-113.5072631835,44.86284637451,-112.8395233154,44.31266784668,-110.9373550415,44.44471740722,-110.950553894,44.95633697509,-108.1549987793,44.98777389526,-103.8922653198,44.98892211914,-103.7473602294,49.05199050903,-109.5802764892,49.08559036254,-116.0748825073,49.02441787719 ISO 19115 Topic Category inlandWaters subbasin sub-basin watershed basin hydro hydrologic unit 4th-code huc catchment drainage Montana None The Montana State Library 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 address

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Helena Montana 59620-1800 406-444-5354 Montana Relay 711 406-444-0266 geoinfo@mt.gov https://ftpgeoinfo.msl.mt.gov/Documents/Maps/Individual/19950309_484_1995_MTRiverBasins.gif Poor. We know that some basin boundaries cross streams shown on 1:100,000 scale Digital Line Graphs. Approximate accuracy of 1:2,000,000 scale data is 1000 meters. Bonneville Power Administration Unpublished material Portland, Oregon 1000000 Arc/Info coverage e00 file 1991 Publication Date s1 Project BPA river basin data to Montana Albers equal area coordinate system. s1 19910309 GT-polygon composed of chains 109 State Plane Coordinate System 1983 2500 45 49 -109.5 44.25 600000.00000 0.00000 meters North American Datum of 1983 Geodetic Reference System 80 6378137 298.257 SubBasin1991 Polygon Attribute Table FID Internal Feature ID number Shape Feature coordinates Area Area of feature in square meters Perimeter Perimeter of feature in meters HD52_ Internal Feature ID from original coverage version of the data HD52_ID User ID from original coverage version of the data HUC 8-digit Hydrologic Unit Code (4th-code) BASIN_NAME Name of River Basin ACRES Area, acres HUC4 4-digit Hydrologic Unit Code Montana State Library mailing address

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Helena MT 59620-1800 406-444-5354 Montana Relay 711 406-444-0266 geoinfo@mt.gov Downloadable Data The Montana State Library 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. 20140814 20040929 19941115 19961005 Montana State Library mailing address

P.O. Box 201800

Helena Montana 59620-1800 406-444-5354 Montana Relay 711 406-444-0266 geoinfo@mt.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 {f44f05e0-23e5-11e4-8c21-0800200c9a66}