Montana Natural Heritage Program 20210224 Montana Natural Heritage Program https://ftpgeoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Geodatabases/MT_Waterbody_Access.zip The Montana Waterbody Access dataset represents a snapshot of the probable presence of waterbody access structures and points. These data were visually surveyed from natural color digital aerial imagery collected during the summers of 2013, 2015, and 2017 by the National Agricultural Imagery Program (NAIP). In cases with unclear, shadowed, or ambiguous NAIP imagery, Google Earth imagery was consulted (generally from the summers of 2013-2016). Features were searched for at a scale of 1:4,000 - 1:5,000 and digitized at a scale potentially as fine as 1:2000. The following shoreline features may have been mapped: docks, ramps, marinas (extensive dock structures with 5 or more slips) and other access points. If a feature was present in any year in the imagery above, it was digitized. The National Hydrography Dataset (NHD) was used to identify waterbodies. The shorelines of lake and reservoirs with surface areas greater than to 0.133 square kilometers (~1/20th square mile) were searched, resulting in over 1200 waterbodies surveyed (see lakeres_mapped4access layer). Additional searches were conducted along some major slow-flowing rivers that could potentially support docks (see rivers_mapped4access). Current (2019) Fishing Access Sites (FAS) were also reviewed and features mapped. The Montana Waterbody Access dataset contains data for docks, ramps, marinas, and general access points on and around Montana’s largest lakes, reservoirs and select major rivers. These data were developed to assist with planning and response efforts related to Aquatic Invasive Species. 20130101 20191231 Ground Condition Complete None planned -116.5 -103.5 49.5 44 ISO 19115 Topic Categories environment inlandWaters structure transportation None AIS aquatic invasive species docks lakes ramps reservoirs waterbody access None Montana None Mapped features, whether noted as public, commercial, or otherwise, do not necessarily imply public access. The Montana Natural Heritage Program (MTNHP) provides this product/service for informational purposes only. Users must assume responsibility to determine the usability of this data for their purposes. MTNHP provides these data in good faith but does not represent or warrant its accuracy, adequacy, or completeness. In no event shall MTNHP 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. MTNHP reserves the right to change or revise published data and/or services at any time. Montana Natural Heritage Program mailing

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Helena MT 59620-1800 US 406-444-5363 mtnhp@mt.gov Vector State Plane Coordinate System 2500 45.000000 49.000000 -109.500000 44.250000 600000.000000 0.000000 coordinate pair 0.000000 0.000000 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 access_points Points of potential access to waterbodies Type Generalized type of access point; may be inferred from surrounding land ownership Major Public Major Public access point Minor Public Minor Public access point Tribal Tribal access point Commercial Commercial access point Private Private access point Unknown Unknown status access point docks Likely docks Type Generalized type of dock (ownership); may be inferred from land ownership Public Public dock Tribal Tribal dock Commercial Commercial dock Private Private dock Unknown Unknown ownership dock ramps Likely ramps Type Generalized type of ramp; may be inferred from land ownership Public Public ramp Tribal Tribal ramp Commercial Commercial ramp Private Private ramp Unknown Unknown ownership ramp Surface Observed, probable surface of ramp; based on aerial imagery (may be incorrect) Paved Paved ramp Gravel Gravel ramp (possibly semi-improved) Dirt Dirt ramp (unimproved) Rail Rail ramp Unknown Unknown or undetermined surface marinas Marinas (extensive dock structures with 5 or more slips) Type Generalized type of marina; may be inferred from land ownership Public Public marina Tribal Tribal marina Commercial Commercial marina Private Private marina Unknown Unknown status marina lakeres_mapped4access These are the lakes and reservoirs that were searched NHDWaterbody rivers_mapped4access These are the river reaches that were searched NHDArea Montana Natural Heritage Program mailing

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Helena MT 59620-1800 US 406-444-5363 mtnhp@mt.gov Downloadable Data See access and use constraints information. 20210224 Montana Natural Heritage Program mailing

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Helena MT 59620-1800 US 406-444-5363 mtnhp@mt.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time {33F0A7E9-2ECE-47A1-BC62-4CC88BC85B62}