Montana State Library 2016 ArcGIS Server Web Map Service Helena, MT Montana State Library https://montana.maps.arcgis.com/home/item.html?id=e04b577551664fb38759fd042f46c551 This ArcGIS Server map service shows data collected for the Yellowstone River Cumulative Effects Analysis, including the channel migration zone (CMZ), historic locations of the river channel, man-made features that impact the flow of the river, river miles, and aerial photographs of the river made between 1948 and 1955. It also shows the river reaches designated for the analysis. The Yellowstone River Conservation Districts council web page for access to these and other GIS data sets for the Yellowstone River is https://msl.mt.gov/geoinfo/data/yellowstone_river/. Links to detailed metadata for each data set are in the Source Information section of this document. These data were created as part of a joint cumulative effects study of the Yellowstone River led by the Yellowstone River Conservation Districts Council and U.S. Army Corps of Engineers. The multi-agency interdisciplinary planning study extends from Park County, Montana to the Missouri River confluence in McKenzie County, North Dakota. The data are specifically intended to support the hydraulic, geomorphic, biologic and socioeconomic analyses that are part of the planning study. 1948 2016 ground condition -110.2 -103.9 48.2 45.6 ISO 19115 Topic Category inlandWaters structure hydrography stream river channel migration zone historic channels hydrology YRCDC Yellowstone Yellowstone River Corridor Custer Dawson McKenzie Prairie Richland Rosebud Stillwater Sweet Grass Treasure Wibaux Williams Montana North Dakota USA 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. Users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without full awareness of its limitations. Montana State Library mailing address

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Helena MT 59620-1800 406-444-5354 geoinfo@mt.gov DTM Consulting, Inc. 20090615 Helena, MT Montana State Library https://mslservices.mt.gov/Geographic_Information/Data/DataList/datalist_Details?did={C0C9520B-3964-4C0D-8901-C5677610D754} The river mile locations were derived from the "fl_1999_2001_route_primary" layer in this database. This is the stream centerline digitized from aerial photos and the river mile locations are based on their distance along this line from the confluence of the Yellowstone with the Missouri. DTM Counsulting, Inc. 2009 Helena, MT Montana State Library https://mslservices.mt.gov/Geographic_Information/Data/DataList/datalist_Details?did={C0C9520B-3964-4C0D-8901-C5677610D754} The layer is included in the historic banks flowlines dataset. These regions are used to define changes in river channel characteristics based on geomorphic parameters. The reach breaks reflect changes in the channel form captured by color infrared imagery of 2001, but re-assesed as banklines and flowlines of the river were digitized from aerial photos of 1950, 1976, and 1995. The break lines at the river channel were extended to split a 5-mile buffer around the river. DTM Consulting, Inc. 2011 Helena, MT Montana State Library https://mslservices.mt.gov/Geographic_Information/Data/DataList/datalist_Details?did={dbccd653-5ad5-490e-a565-32d5532b1734} DTM Consulting, Inc. 2009 Helena, MT Montana State Library https://mslservices.mt.gov/Geographic_Information/Data/DataList/datalist_Details?did={C0C9520B-3964-4C0D-8901-C5677610D754} U.S. Census Bureau 2009 Washington, DC U.S. Census Bureau DTM Consulting, Inc. 2009 Helena, MT Montana State Library https://mslservices.mt.gov/Geographic_Information/Data/DataList/datalist_Details?did={402858AB-C0CF-4C70-A708-77F6977089A0} DTM Consulting, Inc. 2006 Helena, MT Montana State Library https://ftpgeoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Collections/Yellowstone_River_Clearinghouse/Imagery/1950/ State Plane Coordinate System 2500 45.000000 49.000000 -109.500000 44.250000 600000.000000 0.000000 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 Montana State Library mailing address

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Helena MT 59620-1800 406-444-5354 geoinfo@mt.gov Live data and maps 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. ArcGIS Server Map Service https://montana.maps.arcgis.com/home/item.html?id=e04b577551664fb38759fd042f46c551 20160628 Montana State Library mailing address

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Helena MT 59620-1800 406-444-5354 FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 {A5AB7F8E-D42F-4BC9-B289-4CE14FB71C24}