This map data layer represents the hydrology for the City of Memphis, TN. This includes lakes, creeks, streams, open channels, and detention pond features. The extent of the mapped geographic area includes Shelby County and areas beyonde the county boundary.

This layer is a component of The primary focus of the map will be used to look at interceptor lines that come to the plants and see where they cross large bodies of water. We are trying to locate any unnecessary inflow into the system..

These data should not be used as an endpoint for decision making purposes in instances such as spill response or the locating of a well in proximity to other features (e.g., property lines, septic systems, buildings etc.). All well locations should be field verified by the user before decisions are made.

Please note, there may be records in the State’s water well database that do not contain reliable locational information, specifically with respect to the reported latitude and longitude. The database includes entries reported as far back as the 1920s and the accuracy of locational information depends on the type of instruments (e.g., topographic map, address, GPS, etc.) used to record/report the location as well as the diligence of the reporting entity. It is suggested that you review the data using the provided coordinates, the location/address, and the well owner’s name.

Also, municipal well locations and wellhead protection areas are considered confidential under TCA 10-7-504 (a) (21) (A) and Rule 0400-01-01-.01(4)(c), so the location of those data have been redacted from the records provided.

The state of Tennessee is divided into 805 individual 7.5-minute topographic quadrangle maps. The Tennessee Department of Environment and Conservation (TDEC) maintains an archive of paper maps that were utilized for estimating groundwater well locations. Each well location was plotted by hand and marked with corresponding water well data. These hand-plotted locations represent the most accurate spatial information for each well but solely exist in paper format. To create a shapefile of the well location data for this data release, individual paper maps were scanned and georeferenced. From these georeferenced map images (GRI), the hand-plotted well locations were digitized, and a shapefile of point data was created. Attribute table data include quad name, drawing number, and hand-written identification data that was transcribed from the topographic maps. Latitude and longitude coordinates (decimal degrees) were populated and incorporated into the attribute table. The projection is USA Contiguous Albers Equal Area Conic USGS (meters). Detailed descriptions of the attributes can be found in the accompanying metadata files. Shapefile and metadata files can be located in child item for the quadrangle (sorted alphabetically).

This map compiles detailed information regarding forest ownership, water yield, surface drinking water intakes, and percent of water originating on State and private forest (SPF) lands in the State of Tennessee.

The purpose of these maps is to provide a means to estimate the depth to bedrock in Rutherford County, Tennessee. Rutherford County is located entirely within the Central Basin Physiographic Province. The bedrock consists of limestone, argillaceous limestone, mudstone, and limy shale of the Middle Ordovician Chickamauga Group. Depth to bedrock information was obtained from well records contained in the Tennessee Division of Water Resources Water Well Log Tracking System database. The depth to bedrock across the county is depicted using a contour interval of 10 feet.This item is currently not available for individual download, contact Tennessee Geological Survey for more information or see instructions on their ordering page to obtain this resource.

Geospatial data about Rutherford County, Tennessee Water Lines. Export to CAD, GIS, PDF, CSV and access via API.

The Chattanooga Shale is relatively thin and generally continuous across the state, making it an important geologic horizon. In Tennessee, the Chattanooga Shale crops out along the escarpment between the Central Basin and the surrounding Highland Rim, in several river valleys and in folded areas outside the basin, and crops out around the Wells Creek, Howell, and Flynn Creek impact structures (Conant and Swanson, 1961). The Devonian-Mississippian-aged Chattanooga Shale is often abbreviated as "MDc.” Data related to the thickness, depth from land surface, and elevation of the unit are useful for resource exploration. Information from 1,615 oil well and surface data points were used to produce the structure map on the Chattanooga Shale in Tennessee by the Tennessee Department of Environment and Conservation, Division of Geology (Moore and Horton, 1999). The data used in 1999 were acquired from previously drawn structure maps on the base of the Chattanooga Shale and compiled into computer-generated contour lines and maps. The original publication, Structure and isopach maps of the Chattanooga Shale in Tennessee, included three 84x57 cm maps, at an approximate scale of 1:500,000. The paper maps include a structure map on the base of the formation, an isopach map, and a location map of the data points representing wells used to prepare the original structure maps. The three maps associated with the original publication were digitized and rasterized for this project. The work for this project consisted of (1) scanning and georeferencing original paper maps to create georeferenced images (GRI), (2) digitizing well location points and contour lines, (3) populating well and contour attribute tables with data from maps and associated reports, and (4) interpolating raster surfaces for the top and bottom altitude, depth from land surface to the top and bottom surface, and thickness of the Chattanooga Shale in Tennessee. All raster surfaces were aligned to a modified version of the National Hydrogeologic Grid (Clark and others, 2018) to support USGS Lower Mississippi Gulf Water Science Center efforts to create a statewide hydrogeologic framework. All horizontal coordinated data are projected to NAD 1983 USGS Contiguous USA Albers. Raster vertical coordinate information was referenced to the North American Vertical Datum of 1988 (NAVD 88). Dataset types can be identified by the following naming convention: i_ = georeferenced map images (GRI) po_ = points c_ = contours and closed depressions f_= faults and other structural features p_ = extent polygon ra_ = altitude raster rd_ = depth from land surface raster rt_ = thickness raster The datasets included on this child item page are as follows: chttshl_metadata.xml - metadata file chttshl_alldata.zip: GRI/ i_chttshl_btm.tif - structure contour map of the bottom of the Chattanooga Shale (Moore and Wilson, 1999) i_chttshl_data.tif - map of data used to create structure and isopach maps (Moore and Horton, 1999c) i_chttshl_thk.tif - thickness contour map for the Chattanooga Shale (Moore and Horton, 1999b) polygons/ p_chttshl_ext_ext.shp - study area extent for the Chattanooga Shale (Moore and Wilson, 1999) p_hohenwald.shp - polygon for extend of the Hohenwald Platform (Moore and Horton, 1999b) - supplemental data rasters/ ra_chttshl_btm.tif - altitude raster for the bottom of the Chattanooga Shale (NAVD 88) (meters) ra_chttshl_tp.tif - altitude raster for the top of the Chattanooga Shale (NAVD 88) (meters) rd_chttshl_btm.tif - depth from land surface raster of the bottom of the Chattanooga Shale (meters) rd_chttshl_tp.tif - depth from land surface raster of the top of the Chattanooga Shale (meters) rt_chttshl.tif - thickness raster for the Chattanooga Shale (meters) vectors/ c_chttshl_btm.shp - structure contours for the bottom of the Chattanooga Shale (NGVD 29) (feet) c_chttshl_btm_modified.shp - modified structure contours for the bottom of the Chattanooga Shale (hachures removed from closed basins). This vector used to interpolate raster for the bottom of the Chattanooga Shale. (NGVD 29) (feet) c_chttshl_thk.shp - thickness contours for the Chattanooga Shale (feet) c_chttshl_thk_modified.shp - modified thickness contours for the Chattanooga Shale (hachures removed from closed basins). This vector used to interpolate raster for the thickness of the Chattanooga Shale (feet) f_chttshl_btm.shp - faults and other structural features mapped on the base of the Chattanooga Shale po_chttshl.shp - point data of altitude and thickness for the Chattanooga Shale (NGVD 29) (feet) References: Clark, B.R., Barlow, P.M., Peterson, S.M., Hughes, J.D., Reeves, H.W., Vigor, R.J., 2018, National-Scale Grid to Support Regional Groundwater Availability Studies and a National Hydrogeologic Framework, U.S. Geological Survey, ScienceBase data release, doi:10.5066/F7P84B24 Conant, L.C., and Swanson, V.E., 1961, Chattanooga Shale and related rocks of Central Tennessee and nearby areas, U.S. Geological Survey, Professional Paper 357. https://pubs.usgs.gov/publication/pp357. Moore, J.L., and Horton, A.B., 1999, Structure and Isopach Maps of the Chattanooga Shale in Tennessee, Tennessee Dept. of Conservation, Division of Geology, Report of Investigations 48, 3 plates.

This map poster uses Oak Ridge National Laboratory’s 2018 Existing Hydropower Assets Plant Dataset to visualize the geospatial distribution and characteristics of existing hydropower plants in the United States.

List of providers used as resources:Alcoa Electric Departmenthttps://www.outageentry.com/CustomerFacingAppJQM/outage.php?clientid=ALCOAAppalachian Electric Cooperativehttps://www.outageentry.com/CustomerFacingAppJQM/outage.php?clientid=APPALACHIANAppalachian Power Companyhttp://outagemap.appalachianpower.com.s3.amazonaws.com/external/default.htmlBlue Ridge Mountain EMChttp://www.brmemc.com:8080/Bright Ridge / JCPBhttps://css.jcpb.com/woViewer/mapviewer.html?config=Outage+Web+MapBristol Virginia Utilitieshttp://outageview.bvua.com/Chickasaw Electric Cooperativehttps://www.outageentry.com/CustomerFacingAppJQM/outage.php?clientid=CHICKASAWClarksville Department of Electricityhttps://www.outageentry.com/CustomerFacingAppJQM/outage.php?clientid=CDECleveland Utilitieshttp://204.238.168.184:1370/Clinton Utilities Boardhttp://outage.clintonub.com/Columbia Power & Water Systemshttp://oms.cpws.com:7575/Cumberland Electric Membership Corporationhttps://cemc.org/outagemap/index.htmlCumberland Valley Electrichttps://ebill.cumberlandvalley.coop/woViewer/mapviewer.html?config=Outage+Web+MapDuck River EMChttp://outagemap.dremc.com:8182/Fort Loudoun Electric Cooperativehttp://outage.flec.org/French Broad EMChttp://www.frenchbroademc.com/outagemap.cfmGibson Electric Membership Corporationhttp://outagemap.gibsonemc.com/Greeneville Light and Power Systemhttps://ebill.glps.net/woViewer/mapviewer.html?config=Outage+Web+Map&from=qlHolston Electric Cooperativehttp://outage.holstonelectric.com:81/Jackson Energy Authorityhttps://www.jaxenergy.com/outages/Kentucky Utilitieshttp://stormcenter.lge-ku.com/default.htmlKnoxville Utilities Boardhttps://www.kub.org/outage/mapLaFollette Utilitieshttps://www.outageentry.com/CustomerFacingAppJQM/outage.php?clientid=LAFOLLETTELenoir City Utilities Boardhttp://www.lcub.com/livemap/Maryville Electric Departmenthttp://204.63.180.54:7576/Memphis Light Gas and Water Divisionhttp://azimuth.mlgw.org/OutageSummary.phpMiddle Tennessee Electric Membership Corphttps://member.mtemc.com/mapviewer/mapviewer.html?config=Outage+Web+MapNashville Electric Servicehttps://www.nespower.com/outagemap/default.aspxNewport Utilitieshttps://ebill.newportutilities.com/woViewer/mapviewer.html?config=Outage+Web+MapRipley Power & Lighthttp://outages.ripleypower.com/Sequachee Valley Electric Coophttps://www.outageentry.com/CustomerFacingAppJQM/outage.php?clientid=SEQUACHEESevier County Electrichttp://www.sces.net:88/Southwest Tennessee Electric Membership Corphttp://map.stemc.com/Tippah Electric Power Associationhttps://webmap.tippahepa.com/OMSWebMap/OMSWebMap.htm?clientKey=undefinedTri-County Electric REMChttps://www.tcemc.org/outages/Volunteer Energy Cooperativehttps://ebill.vec.org/woViewer/mapviewer.html?config=Outage+Web+Map

The Wells Creek Dolomite is the lowest unit of the Stones River Group. The Wells Creek consists of cherty limestone that underlies the Murfreesboro Limestone of the Stones River Group of Middle Ordovician age, and directly overlies the Knox Group of early Ordovician and late Cambrian age. The unit ranges in thickness from less than 1.52 meters (5 feet) in the eastern part of the Central Basin to approximately 54.86 meters (180 feet) in Stewart County. The depth of the Wells Creek generally ranges from 121.92 meters to 457.2 meters (from 400 to 1500 feet) below land surface (Smith, 1959). The Wells Creek Dolomite does not yield water but it can be easily recognized when drilling wells and it overlies the Knox Group, a deep aquifer in middle Tennessee and a significant source of groundwater for some areas. For this data release, the raster interpolated for the top of the Knox Group in Middle Tennessee (ra_knx_tp.tif) was also used to represent the altitude of the bottom of the Wells Creek Dolomite (See process steps for more details). An isopach map of the thickness of the Wells Creek Dolomite in Middle Tennessee was prepared as a part of a cooperative groundwater study by the Tennessee Division of Geology and the U.S. Geological Survey (USGS) (Smith, 1959). The 43 x 71 cm map covers parts of Middle Tennessee, from Camden east to Crossville, and from the Kentucky border to the Alabama border. The map scale is approximately 1:600,000. Contour intervals are 5 feet (east of the 100-foot isopach) and 10 feet (west of the 100-foot isopach), which show the thickness of the Wells Creek Dolomite. The associated data are altitude values from a study of cuttings in 120 wells between the western boundary of the Cumberland Plateau and the Tennessee River (Smith, 1959). Prior to the current work, the Wells Creek Dolomite isopach map (Smith, 1959) existed in limited quantities, mainly restricted to the Nashville, TN offices of the Tennessee Department of Environment and Conservation (TDEC) and United States Geological Survey (USGS). The work for this project consisted of (1) scanning and georeferencing original paper maps to create georeferenced images (GRI), (2) digitizing well location points and contour lines, (3) populating well and contour attribute tables with data from maps and associated reports, and (4) interpolating raster surfaces for the thickness of the Wells Creek Dolomite using the data from the isopach map (Smith, 1959), altitude of the bottom of the Wells Creek Dolomite by using the data for the top of the Knox Group (Newcome, 1954), altitude of the top of the Wells Creek Dolomite using the bottom of the Wells Creek Dolomite added to the thickness of the Wells Creek Dolomite (Smith, 1959), and depth from land surface to the top and bottom of the Wells Creek (USGS, 2012). All raster surfaces were aligned to a modified version of the National Hydrogeologic Grid (Clark and others, 2018) to support USGS Lower Mississippi Gulf Water Science Center efforts to create a statewide hydrogeologic framework. All horizontal coordinated data are projected to NAD 1983 USGS Contiguous USA Albers. Raster vertical coordinate information was referenced to the North American Vertical Datum of 1988 (NAVD 88). Dataset types can be identified by the following naming convention: "i_" = georeferenced map images (GRI) "po_" = points "c_" = contours "p_" = extent polygons "ra_" = altitude raster "rd_" = depth from land surface raster "rt_" = thickness raster The datasets included on this child item page are as follows: wllscr_metadata.xml - metadata file wllscr_alldata.zip: GRI/ i_wllscr.tif - thickness contour map for the Wells Creek Dolomite (Smith, 1959) polygon/ p_wllscr_ext.shp - study area extent for the Wells Creek Dolomite rasters/ ra_wllscr_btm.tif - altitude raster for the bottom of the Wells Creek Dolomite (same dataset as ra_knx_tp.tif [Newcome, 1954; Smith, 1959]) (NAVD 88) (meters) ra_wllscr_tp.tif - altitude raster for the top of the Wells Creek Dolomite (NAVD 88) (meters) rd_wllscr_btm.tif - depth from land surface raster of the bottom of the Wells Creek Dolomite (same dataset as ra_knx_tp.tif [Newcome, 1954; Smith, 1959]) (meters) rd_wllscr_tp.tif - depth from land surface raster of the top of the Wells Creek Dolomite (meters) rt_wllscr.tif - thickness raster for the Wells Creek Dolomite (meters) vectors/ c_wllscr.shp - thickness contours for the Wells Creek Dolomite po_wllscr.shp - point data for the thickness of Wells Creek Dolomite References: Clark, B.R., Barlow, P.M., Peterson, S.M., Hughes, J.D., Reeves, H.W., Vigor, R.J., 2018, National-Scale Grid to Support Regional Groundwater Availability Studies and a National Hydrogeologic Framework, U.S. Geological Survey, ScienceBase data release, doi:10.5066/F7P84B24. Newcome, R. Jr., 1954, Structure contour map on top of the Knox Dolomite in Middle Tennessee, Tennessee Division of Geology, Ground-Water Investigations Preliminary Chart 5, 1 sheet. Smith, Ollie, Jr., 1959, Isopach Map of the Wells Creek Dolomite in Middle Tennessee: Tennessee Division of Water Resources, one sheet Wilson, C.W. and Stearns, R.G., 1968 Geology of the Wells Creek Structure, Tennessee: Tennessee Division of Geology, Bulletin 68, 248 p.

Data about the top and bottom altitude, depth from land surface and/or the thickness of three geologic units in Tennessee were converted into geospatial format for this USGS data release from previously published paper maps and converted into digital formats for use by the public. The three geologic units were the Chattanooga Shale of Mississippian-Devonian age (Moore and Horton, 1999), the Wells Creek Dolomite of middle Ordovician age (Smith, 1959), and the Knox Group of lower Ordovician age (Newcome, 1954). These geologic units represent important geologic horizons across Tennessee. Geologic structure maps provide important information and, in digital format, support investigative and modeling efforts pertaining to water and mineral resources. Prior to this work, the paper source maps used for this data release existed in limited quantities, mainly restricted to the Nashville, TN offices of the Tennessee Department of Environment and Conservation (TDEC) and United States Geological Survey (USGS). The work for this project included (1) scanning and georeferencing original paper maps to create georeferenced images (GRI), (2) digitizing well location points and contour lines, (3) populating well and contour attribute tables with data from maps and associated reports, and (4) when possible, interpolating raster surfaces for the three geologic units of top and bottom altitude, depth from land surface to the top and bottom surface, and thickness. All raster surfaces were aligned to a modified version of the National Hydrogeologic Grid (Clark and others, 2018) to support USGS Lower Mississippi Gulf Water Science Center efforts to create a statewide hydrogeologic framework. All horizontal coordinated data are projected to NAD 1983 USGS Contiguous USA Albers. The raster vertical coordinate information was referenced to the North American Vertical Datum of 1988 (NAVD 88). This data release includes GRIs, vector data of the wells and mapped contours of top, bottom, or thickness, raster data, and related metadata files for each three geologic units under the associated child item tab. Dataset types can be identified by the following naming convention: i_ = georeferenced map images (GRI) po_ = points c_ = contours and closed depressions f_= faults and other structural features p_ = extent polygon ra_ = altitude raster rd_ = depth from land surface raster rt_ = thickness raster The datasets included on this main landing page are as follows: project_metadata.xml – metadata file for general project information studyarea_ext.zip: p_chttshl_ext.shp - mapped extent of the Chattanooga Shale in Tennessee p_wllscr_ext.shp - mapped extent of the Wells Creek Dolomite in Tennessee p_knx_ext.shp - mapped extent of the Knox Group in Tennessee The datasets included on the child item pages are as follows: Chattanooga Shale: geospatial geologic structural datasets in Tennessee: chttshl_metadata.xml - metadata file chttshl_alldata.zip: GRI/ i_chttshl_btm.tif - structure contour map of the bottom of the Chattanooga Shale (Moore and Horton, 1999) i_chttshl_data.tif - map of data used to create structure and isopach maps (Moore and Horton, 1999) i_chttshl_thk.tif - thickness contour map for the Chattanooga Shale (Moore and Horton, 1999) polygons/ p_knx_ext.shp - study area extent for the Chattanooga Shale p_hohenwald.shp - polygon for extend of the Hohenwald Platform (Moore and Horton, 1999) - supplemental data rasters/ ra_chttshl_btm.tif - altitude raster for the bottom of the Chattanooga Shale ra_chttshl_tp.tif - altitude raster for the top of the Chattanooga Shale rd_chttshl_btm.tif - depth from land surface raster of the bottom of the Chattanooga Shale rd_chttshl_tp.tif - depth from land surface raster of the top of the Chattanooga Shale rt_chttshl.tif - thickness raster for the Chattanooga Shale vectors/ c_chttshl_btm.shp - structure contours for the bottom of the Chattanooga Shale c_chttshl_btm_modified.shp - modified structure contours for the bottom of the Chattanooga Shale (hachures removed from closed basins). This vector used to interpolated raster for the bottom of the Chattanooga Shale c_chttshl_thk.shp - thickness contours for the Chattanooga Shale c_chttshl_thk_modified.shp - modified thickness contours for the Chattanooga Shale (hachures removed from closed basins). This vector used to interpolated raster for the thickness of the Chattanooga Shale po_chttshl.shp - point data of altitude and thickness for the Chattanooga Shale Knox Group: geospatial geologic structural datasets in Middle Tennessee: knx_metadata.xml - metadata file knx_alldata.zip: GRI/ i_knx_tp.tif - structure contour map on the top of the Knox Group (Newcome, 1954) i_knx_outcrop.tif - map of the Wells Creek Disturbance (Wilson and Stearns, 1968) polygons/ p_chttshl_ext.shp - study area extent for the Knox Group p_hohenwald.shp - extent of the Hohenwald Platform - supplemental data rasters/ ra_knx_tp.tif - altitude raster for the top of the Knox Group rd_knx_tp.tif - depth from land surface raster of the top of Knox Group vectors/ c_knx_tp.shp - structure contours for the top of the Knox Group c_knx_tp_modified.shp - modified structure contours for the top of the Knox Group (hachures removed from closed basins). This vector used to interpolated raster for the top of the Knox Group po_knx_tp.shp - point data for the altitude of top of the Knox Group Wells Creek Dolomite: geospatial geologic structural datasets in Tennessee: wllscr_metadata.xml - metadata file wllscr_alldata.zip: GRI/ i_wllscr.tif - thickness contour map for the Wells Creek Dolomite (Smith, 1959) polygons/ p_wllscr_ext.shp - study area extent for the Wells Creek Dolomite rasters/ ra_wllscr_btm.tif - altitude raster for the bottom of the Wells Creek Dolomite (same dataset as ra_knx_tp.tif [Newcome, 1954; Smith, 1959]) ra_wllscr_tp.tif - altitude raster for the top of the Wells Creek Dolomite rd_wllscr_btm.tif - depth from land surface raster of the bottom of the Wells Creek Dolomite (same dataset as ra_knx_tp.tif [Newcome, 1954; Smith, 1959]) rd_wllscr_tp.tif - depth from land surface raster of the top of the Wells Creek Dolomite rt_wllscr.tif - thickness raster for the Wells Creek Dolomite vectors/ c_wllscr.shp - thickness contours for the Wells Creek Dolomite po_wllscr.shp - point data for the thickness of Wells Creek Dolomite References: Moore, J.L., and Horton, A.B., 1999, Structure and Isopach Maps of the Chattanooga Shale in Tennessee, Tennessee Dept. of Conservation, Division of Geology, Report of Investigations 48, 3 plates. Newcome, R. Jr., 1954, Structure contour map on top of the Knox Dolomite in Middle Tennessee, Tennessee Division of Geology, Ground-Water Investigations Preliminary Chart 5, 1 sheet. Smith, O. Jr., 1959, Isopach map of the Wells Creek Dolomite in Middle Tennessee: Tennessee Division of Water Resources, one sheet. Wilson, C.W. and Stearns, R.G., 1968 Geology of the Wells Creek Structure, Tennessee: Tennessee Division of Geology, Bulletin 68, 248 p.

This EnviroAtlas dataset describes the block group population and the percentage of the block group population that has potential views of water bodies. A potential view of water is defined as having a body of water that is greater than 300m2 within 50m of a residential location. The window views are considered "potential" because the procedure does not account for presence or directionality of windows in one's home. The residential locations are defined using the EnviroAtlas Dasymetric (2011/October 2015 version) map. This dataset was produced by the US EPA to support research and online mapping activities related to EnviroAtlas. EnviroAtlas (https://www.epa.gov/enviroatlas) allows the user to interact with a web-based, easy-to-use, mapping application to view and analyze multiple ecosystem services for the contiguous United States. The dataset is available as downloadable data (https://edg.epa.gov/data/Public/ORD/EnviroAtlas) or as an EnviroAtlas map service. Additional descriptive information about each attribute in this dataset can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets).

The Knox Dolomite is currently recognized as the Knox Group. The Mascot Dolomite, the upper unit of the Knox Group, is dolomite and dolomitic limestone of Lower-Ordovician-age that occurs in the subsurface of most of Tennessee. This data release will focus on Middle Tennessee, where the only outcrop of the Knox Group is in the Wells Creek basin in Stewart and Houston counties (Bradley, 1986; Wilson and Stearns, 1968). The top of the Knox Dolomite is an erosional surface that is useful as a structural datum because of the importance of the Knox Group for oil and gas resources, zinc mineralization, and domestic drinking water supplies. Since the upper approximately 30 meters of the Knox Group is paleokarst, groundwater is generally under confined conditions (Bradley, 1986; Wilson and Stearns, 1968). This upper portion of the Knox is often low-yielding and variable in water quality. However, it can be a reliable aquifer in specific areas - mostly in the Central Basin. A structure contour map on the Knox Group in Middle Tennessee was prepared by Newcome (1954) as a part of a cooperative program of groundwater investigations by the U.S. Geological Survey and the Tennessee Division of Geology at Nashville, Tennessee. Prior to this work, this paper map existed in limited quantities, mainly restricted to the Nashville offices of the Tennessee Department of Environment and Conservation (TDEC) and United States Geological Survey (USGS). The map measuring 46 x 64 cm, with an approximate scale of 1:500,000 was prepared with well elevation data, determined by aneroid barometer or from topographic quadrangle maps (Newcome, 1954). Structure contours were drawn on top of Knox Group at 100 feet intervals. The work for this project consisted of (1) scanning and georeferencing original paper maps to create georeferenced images (GRI), (2) digitizing well location points and contour lines, (3) populating well and contour attribute tables with data from maps and associated reports, and (4) interpolating raster surfaces for the top altitude of the Knox Group and depth from land surface to the top of the unit. All raster surfaces were aligned to a modified version of the National Hydrogeologic Grid (Clark and others, 2018) to support USGS Lower Mississippi Gulf Water Science Center efforts to create a statewide hydrogeologic framework. All horizontal coordinated data are projected to NAD 1983 USGS Contiguous USA Albers. Vertical coordinate information was referenced to the North American Vertical Datum of 1988 (NAVD 88). Dataset types can be identified by the following naming convention: i_ = georeferenced map images (GRI) po_ = points c_ = contours and closed depressions f_= faults and other structural features p_ = extent polygon(s) ra_ = altitude raster rd_ = depth from land surface raster rt_ = thickness raster The datasets included on this child item page are as follows: knx_metadata.xml - metadata file knx_alldata.zip: GRI/ i_knx_tp.tif - structure contour map on the top of the Knox Group (Newcome, 1954) i_knx_outcrop.tif - map of the Wells Creek Disturbance (Wilson and Stearns, 1968) polygons/ "p_knx_ext" - extent polygon for the Knox Group "p_knx_outcrop" - extent polygon the Wells Creek Structure - Knox Group outcrop rasters/ ra_knx_tp.tif - altitude raster for the top of the Knox Group (NAVD 88) (meters) rd_knx_tp.tif - depth from land surface raster of the top of Knox Group (meters) vectors/ c_knx_tp.shp - structure contours for the top of the Knox Group (NGVD 29) (feet) c_knx_tp_modified.shp - modified structure contours for the top of the Knox Group (hachures removed from closed basins). This vector used to interpolate raster for the top of the Knox Group (NGVD 29) (feet) po_knx_tp.shp - point data for the altitude of top of the Knox Group (NGVD 29) (feet) References: Bradley, M. W., 1986, Preliminary Evaluation of the Knox Group in Tennessee for Receiving Injected Wastes, U.S. Geological Survey, Environmental Protection Agency, Water-resources investigations report, Volume 85-4304, 20 p. Clark, B.R., Barlow, P.M., Peterson, S.M., Hughes, J.D., Reeves, H.W., Vigor, R.J., 2018, National-Scale Grid to Support Regional Groundwater Availability Studies and a National Hydrogeologic Framework, U.S. Geological Survey, ScienceBase data release, doi:10.5066/F7P84B24. Newcome, R. Jr., 1954, Structure contour map on top of the Knox Dolomite in Middle Tennessee, Tennessee Division of Geology, Ground-Water Investigations Preliminary Chart 5, 1 sheet. Wilson, C.W. and Stearns, R.G., 1968 Geology of the Wells Creek Structure, Tennessee: Tennessee Division of Geology, Bulletin 68, 248 p.

TDEC is continuously striving to create better business practices through GIS and one way that we have found to provide information and answer some question is utilizing an interactive map. An interactive map is a display of geospatial data that allows you to manipulate and query the contents to get the information needed using a set of provided tools. Interactive maps are created using GIS software, and then distributed to users, usually over a computer network. The TDEC Land and Water interactive map will allow you to do simple tasks such as pan, zoom, measure and find a lat/long, while also giving you the capability of running simple queries to locate land and waters by name, entity, and number. With the ability to turn off and on back ground images such as aerial imagery (both black and white as well as color), we hope that you can find much utility in the tools provided.

Data about the top and bottom altitude, depth from land surface and/or the thickness of three geologic units in Tennessee were converted into geospatial format for this USGS data release from previously published paper maps and converted into digital formats for use by the public. The three geologic units were the Chattanooga Shale of Mississippian-Devonian age (Moore and Horton, 1999), the Wells Creek Dolomite of middle Ordovician age (Smith, 1959), and the Knox Group of lower Ordovician age (Newcome, 1954). These geologic units represent important geologic horizons across Tennessee. Geologic structure maps provide important information and, in digital format, support investigative and modeling efforts pertaining to water and mineral resources. Prior to this work, the paper source maps used for this data release existed in limited quantities, mainly restricted to the Nashville, TN offices of the Tennessee Department of Environment and Conservation (TDEC) and United States Geological Survey (USGS). The work for this project included (1) scanning and georeferencing original paper maps to create georeferenced images (GRI), (2) digitizing well location points and contour lines, (3) populating well and contour attribute tables with data from maps and associated reports, and (4) when possible, interpolating raster surfaces for the three geologic units of top and bottom altitude, depth from land surface to the top and bottom surface, and thickness. All raster surfaces were aligned to a modified version of the National Hydrogeologic Grid (Clark and others, 2018) to support USGS Lower Mississippi Gulf Water Science Center efforts to create a statewide hydrogeologic framework. All horizontal coordinated data are projected to NAD 1983 USGS Contiguous USA Albers. The raster vertical coordinate information was referenced to the North American Vertical Datum of 1988 (NAVD 88). This data release includes GRIs, vector data of the wells and mapped contours of top, bottom, or thickness, raster data, and related metadata files for each three geologic units under the associated child item tab. Dataset types can be identified by the following naming convention: i_ = georeferenced map images (GRI) po_ = points c_ = contours and closed depressions f_= faults and other structural features p_ = extent polygon ra_ = altitude raster rd_ = depth from land surface raster rt_ = thickness raster The datasets included on this main landing page are as follows: project_metadata.xml – metadata file for general project information studyarea_ext.zip: p_chttshl_ext.shp - mapped extent of the Chattanooga Shale in Tennessee p_wllscr_ext.shp - mapped extent of the Wells Creek Dolomite in Tennessee p_knx_ext.shp - mapped extent of the Knox Group in Tennessee The datasets included on the child item pages are as follows: Chattanooga Shale: geospatial geologic structural datasets in Tennessee: chttshl_metadata.xml - metadata file chttshl_alldata.zip: GRI/ i_chttshl_btm.tif - structure contour map of the bottom of the Chattanooga Shale (Moore and Horton, 1999) i_chttshl_data.tif - map of data used to create structure and isopach maps (Moore and Horton, 1999) i_chttshl_thk.tif - thickness contour map for the Chattanooga Shale (Moore and Horton, 1999) polygons/ p_knx_ext.shp - study area extent for the Chattanooga Shale p_hohenwald.shp - polygon for extend of the Hohenwald Platform (Moore and Horton, 1999) - supplemental data rasters/ ra_chttshl_btm.tif - altitude raster for the bottom of the Chattanooga Shale ra_chttshl_tp.tif - altitude raster for the top of the Chattanooga Shale rd_chttshl_btm.tif - depth from land surface raster of the bottom of the Chattanooga Shale rd_chttshl_tp.tif - depth from land surface raster of the top of the Chattanooga Shale rt_chttshl.tif - thickness raster for the Chattanooga Shale vectors/ c_chttshl_btm.shp - structure contours for the bottom of the Chattanooga Shale c_chttshl_btm_modified.shp - modified structure contours for the bottom of the Chattanooga Shale (hachures removed from closed basins). This vector used to interpolated raster for the bottom of the Chattanooga Shale c_chttshl_thk.shp - thickness contours for the Chattanooga Shale c_chttshl_thk_modified.shp - modified thickness contours for the Chattanooga Shale (hachures removed from closed basins). This vector used to interpolated raster for the thickness of the Chattanooga Shale po_chttshl.shp - point data of altitude and thickness for the Chattanooga Shale Knox Group: geospatial geologic structural datasets in Middle Tennessee: knx_metadata.xml - metadata file knx_alldata.zip: GRI/ i_knx_tp.tif - structure contour map on the top of the Knox Group (Newcome, 1954) i_knx_outcrop.tif - map of the Wells Creek Disturbance (Wilson and Stearns, 1968) polygons/ p_chttshl_ext.shp - study area extent for the Knox Group p_hohenwald.shp - extent of the Hohenwald Platform - supplemental data rasters/ ra_knx_tp.tif - altitude raster for the top of the Knox Group rd_knx_tp.tif - depth from land surface raster of the top of Knox Group vectors/ c_knx_tp.shp - structure contours for the top of the Knox Group c_knx_tp_modified.shp - modified structure contours for the top of the Knox Group (hachures removed from closed basins). This vector used to interpolated raster for the top of the Knox Group po_knx_tp.shp - point data for the altitude of top of the Knox Group Wells Creek Dolomite: geospatial geologic structural datasets in Tennessee: wllscr_metadata.xml - metadata file wllscr_alldata.zip: GRI/ i_wllscr.tif - thickness contour map for the Wells Creek Dolomite (Smith, 1959) polygons/ p_wllscr_ext.shp - study area extent for the Wells Creek Dolomite rasters/ ra_wllscr_btm.tif - altitude raster for the bottom of the Wells Creek Dolomite (same dataset as ra_knx_tp.tif [Newcome, 1954; Smith, 1959]) ra_wllscr_tp.tif - altitude raster for the top of the Wells Creek Dolomite rd_wllscr_btm.tif - depth from land surface raster of the bottom of the Wells Creek Dolomite (same dataset as ra_knx_tp.tif [Newcome, 1954; Smith, 1959]) rd_wllscr_tp.tif - depth from land surface raster of the top of the Wells Creek Dolomite rt_wllscr.tif - thickness raster for the Wells Creek Dolomite vectors/ c_wllscr.shp - thickness contours for the Wells Creek Dolomite po_wllscr.shp - point data for the thickness of Wells Creek Dolomite References: Moore, J.L., and Horton, A.B., 1999, Structure and Isopach Maps of the Chattanooga Shale in Tennessee, Tennessee Dept. of Conservation, Division of Geology, Report of Investigations 48, 3 plates. Newcome, R. Jr., 1954, Structure contour map on top of the Knox Dolomite in Middle Tennessee, Tennessee Division of Geology, Ground-Water Investigations Preliminary Chart 5, 1 sheet. Smith, O. Jr., 1959, Isopach map of the Wells Creek Dolomite in Middle Tennessee: Tennessee Division of Water Resources, one sheet. Wilson, C.W. and Stearns, R.G., 1968 Geology of the Wells Creek Structure, Tennessee: Tennessee Division of Geology, Bulletin 68, 248 p.

This map poster uses Oak Ridge National Laboratory’s 2016 Existing Hydropower Assets Plant Dataset to visualize the geospatial distribution and characteristics of existing hydropower plants in the United States.

TIGER/Line Shapefiles 2023-01-06 16:04

This resource is a data compilation of Tennessee Thermal Springs in Tennessee where the water temperature has been measured. It was compiled by the Tennessee Division of Geology and published as a Web feature service for the National Geothermal Data System. The data is available in the following formats: web feature service, web map service, ESRI service and an Excel workbook for download. The workbook contains 4 worksheets, including information about the template with notes related to revisions of the template, resource provider information, the data, and a field list (to assist data mapping). This data was provided by the Tennessee Division of Geology and made available for distribution through the National Geothermal Data Systems project. The schema for this data has been revised and additional data added. The latest data in schema 1.8 can be found in the repository at http://repository.stategeothermaldata.org/repository/resource/90e5aa8a743c04160c055efb0297c2d8/

Basemap datasets comprise six of the seven FGDC themes of geospatial data that are used by most GIS applications (Note: the seventh framework theme, orthographic imagery, is packaged in a spearate NFIP Metadata Profile): cadastral, geodetic control, govermental unit, transportation, general structures, hydrography (water areas and lines). These data include an encoding of the geographic extent of the features and a minimal number of attributes needed to identify and describe the features. (Source: Circular A-16, p. 13)

The state of Tennessee is divided into 805 individual 7.5-minute topographic quadrangle maps. The Tennessee Department of Environment and Conservation (TDEC) maintains an archive of paper maps that were utilized for estimating groundwater well locations. Each well location was plotted by hand and marked with corresponding water well data. These hand-plotted locations represent the most accurate spatial information for each well but exist solely in paper format. To create the shapefile of the well location data for this data release, individual paper maps were scanned and georeferenced. From these georeferenced map images (GRI), the hand-plotted well locations were digitized into a shapefile of point data using ArcGIS Pro. The shapefile is contained in "TN_waterwell.zip," which contains locations for 8,826 points from the first 200 7.5-minute quadrangles in Tennessee (sorted alphabetically) from Adair 438NW through Harriman 123NE. While some spring locations are included in this dataset, it does not provide a comprehensive collection of spring data. Attribute data includes quad name, drawing number, and hand-written identification data that was transcribed from the topographic maps. Latitude and longitude coordinates (decimal degrees) were populated. Data projection is USA Contiguous Albers Equal Area Conic USGS (meters). A table of attribute data is included in this data release as "TN_waterwells_table.xlsx." Detailed descriptions of the attributes can be found in the accompanying metadata file named "TN_waterwells_metadata.xml."