Streams with extant and historic blackside dace (Chrosomus cumberlandensis) populations. Blackside dace is federally-list as threatened. These data represent known populations as of September 2009 and are not meant to represent every stream in which the species may occur in. The species is known to occur in streams throughout much of the Upper Cumberland River watershed primarily above Cumberland Falls. A few disjunct populations are also known from the North Fork Powell River watershed (Lee Co., VA) and Staunton Creek watershed, Clinch River system (Scott Co., VA). The Virginian populations are not included in this data.https://ky.box.com/v/kymartian-blackside-dace

The Digital Bedrock Geologic-GIS Map of Obed Wild and Scenic River and Vicinity, Tennessee is composed of GIS data layers and GIS tables, and is available in the following GRI-supported GIS data formats: 1.) an ESRI file geodatabase (obed_bedrock_geology.gdb), a 2.) Open Geospatial Consortium (OGC) geopackage, and 3.) 2.2 KMZ/KML file for use in Google Earth, however, this format version of the map is limited in data layers presented and in access to GRI ancillary table information. The file geodatabase format is supported with a 1.) ArcGIS Pro 3.X map file (.mapx) file (obed_bedrock_geology.mapx) and individual Pro 3.X layer (.lyrx) files (for each GIS data layer). The OGC geopackage is supported with a QGIS project (.qgz) file. Upon request, the GIS data is also available in ESRI shapefile format. Contact Stephanie O'Meara (see contact information below) to acquire the GIS data in these GIS data formats. In addition to the GIS data and supporting GIS files, three additional files comprise a GRI digital geologic-GIS dataset or map: 1.) a readme file (obed_geology_gis_readme.pdf), 2.) the GRI ancillary map information document (.pdf) file (obed_geology.pdf) which contains geologic unit descriptions, as well as other ancillary map information and graphics from the source map(s) used by the GRI in the production of the GRI digital geologic-GIS data for the park, and 3.) a user-friendly FAQ PDF version of the metadata (obed_bedrock_geology_metadata_faq.pdf). Please read the obed_geology_gis_readme.pdf for information pertaining to the proper extraction of the GIS data and other map files. Google Earth software is available for free at: https://www.google.com/earth/versions/. QGIS software is available for free at: https://www.qgis.org/en/site/. Users are encouraged to only use the Google Earth data for basic visualization, and to use the GIS data for any type of data analysis or investigation. The data were completed as a component of the Geologic Resources Inventory (GRI) program, a National Park Service (NPS) Inventory and Monitoring (I&M) Division funded program that is administered by the NPS Geologic Resources Division (GRD). For a complete listing of GRI products visit the GRI publications webpage: https://www.nps.gov/subjects/geology/geologic-resources-inventory-products.htm. For more information about the Geologic Resources Inventory Program visit the GRI webpage: https://www.nps.gov/subjects/geology/gri.htm. At the bottom of that webpage is a "Contact Us" link if you need additional information. You may also directly contact the program coordinator, Jason Kenworthy (jason_kenworthy@nps.gov). Source geologic maps and data used to complete this GRI digital dataset were provided by the following: University of Tennessee, Tectonics and Structural Geology Research Group and Tennessee Division of Geology. Detailed information concerning the sources used and their contribution the GRI product are listed in the Source Citation section(s) of this metadata record (obed_bedrock_geology_metadata.txt or obed_bedrock_geology_metadata_faq.pdf). Users of this data are cautioned about the locational accuracy of features within this dataset. Based on the source map scale of 1:24,000 and United States National Map Accuracy Standards features are within (horizontally) 12.2 meters or 40 feet of their actual location as presented by this dataset. Users of this data should thus not assume the location of features is exactly where they are portrayed in Google Earth, ArcGIS Pro, QGIS or other software used to display this dataset. All GIS and ancillary tables were produced as per the NPS GRI Geology-GIS Geodatabase Data Model v. 2.3. (available at: https://www.nps.gov/articles/gri-geodatabase-model.htm).

Over the last two decades, the Colorado River Basin has been in an extended drought.1 This has resulted in substantial changes to the basin, including increased wildfire activity, vegetation shifts, and the depletion of streamflows and water levels in major reservoirs along the Colorado River, notably Lake Powell and Lake Mead.In the winter of 2022-23, a series of storms traversed the western U.S. bringing multiple rounds of snow and rain, contributing to a Rocky Mountain snowpack that grew to near-record levels at some locations – making it feel like the drought was over.But how wet was it really, when compared to historical averages?

Development of a high-resolution digital elevation model (DEM) of the pre-Glen Canyon Dam topography in Glen Canyon National Recreation Area, Utah and Arizona was initiated to assist the U.S. Geological Survey (USGS) in its Lake Powell coring program in the fall of 2018 (https://www.usgs.gov/centers/ut-water/science/lake-powell-coring). Topographic surveys of Glen Canyon were commissioned by the Bureau of Reclamation during the planning stages for Lake Powell as part of the Colorado River Storage Project (S. 500, 1956). The Colorado River arm was surveyed by Alster and Associates, Inc. in 1958 and 1959 at a contour interval of 10-feet from the river surface at the future dam site through where the 3,750-foot contour crosses the channel (above Hite, UT). The San Juan River arm was surveyed by Fairchild Aerial Surveys, Inc. in 1947 at a contour interval of 20-feet from the confluence between the San Juan and Colorado Rivers through where the 4,100-foot contour crosses the channel (east of Mexican Hat, UT), though this DEM only includes topography up to 3,800 feet. Digitization of these contour maps into vector data was finalized in 2019 by the USGS Utah Water Science Center. The National Park Service, Glen Canyon National Recreation Area and the Bureau of Reclamation, and Glen Canyon Environmental Studies contributed in the digitization (c. 1999). The hydrologically corrected, 2-meter DEM was developed with the Topo to Raster tool in ArcMap (v. 10.6.1). These data are provided as-is and may be subject to revisions without warrant or consent.