Montana Department of Natural Resources and Conservation 2010 vector digital data Helena, Montana Montana State Library https://ftpgeoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Collections/Yellowstone_River_Clearinghouse/Shapefiles/YelPhysFeat1954.zip https://mslservices.mt.gov/Geographic_Information/Data/DataList/datalist_Details.aspx?did={17daa910-aba0-11e3-a5e2-0800200c9a66} An Historic Channel Modification Inventory for the years 1954, 1973 and 1999 was prepared for the upper Yellowstone River from Gardiner, Montana to Springdale, Montana in 2001 and 2002 to support the cumulative effects investigation sponsored by the Governor's Upper Yellowstone River Task Force. Channell modifications include barbs or jetties, riprap, and dikes. This layer was created to support the Geomorphology Investigation sponsored by the Governor's Upper Yellowstone River Task Force. 1954 ground condition -110.95 -110.20 45.75 45.10 ISO 19115 Topic Category inlandWaters structure physical features channel modification barb riprap dike barbs rip rap dikes jetty Montana Park County Yellowstone River 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. Jim Robinson Montana Department of Natural Resources and Conservation mailing address

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Helena Montana 59620-1800 406-444-4247 jrobinson@mt.gov The accuracy of the channel modification data is dependent on the photography used to capture the data: 2.5-foot pixel resolution, black and white, orthophotos at a scale of 1:15,480. Channel and floodplain modification inventory data set is complete as of the aerial photography date (1954). The 1954 data sets meet the National Map Accuracy Standards for 200 feet per inch horizontal mapping. U.S. Soil Conservation Service 2010 Montana State Library https://mslservices.mt.gov/Geographic_Information/Data/DataList/datalist_MetadataDetail.aspx?did={243d674a-f0ff-4d29-943c-b5f7dd8174b8} 15480 1954 floodplain modifications were captured from this photo set. Aerial photos of the channel from Gardiner to Springdale were viewed in stereo and features identifiable as barbs or jetties, riprap, and dikes were mapped. The spatial extent of features were transferred onto a digital orthophoto mosaic of the 1954 hardcopy photos to create the ArcView shapefile. 2002 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 feature attribute table FID Internal feature number. Shape Feature geometry. FEATURE Feature Type lbrb Left bank rock barb rbrb Right bank rock barb lbrj left bank rock jetty rbrj right bank rock jetty dike dike lbbrr Left bank blanket rock riprap rbbrr right bank blanket rock riprap COMMENT Description provided by photo-interpreter. Montana State Library mailing address

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Helena MT 59620-1800 406-444-5354 406-444-5354 Montana Relay 711 406-444-0266 geoinfo@mt.gov 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. https://ftpgeoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Collections/Yellowstone_River_Clearinghouse/Shapefiles/YelPhysFeat1954.zip 20131115 20130417 20101001 Jim Robinson Montana Department of Natural Resources and Conservation mailing address

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Helena Montana 59620-1601 406-444-4247 jrobinson@mt.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 {04e44aa6-8f59-4cfd-9a5b-4887ce9b0455}