U.S. Geological Survey in cooperation with U.S. Environmental Protection Agency, USDA Forest Service, and other Federal, State and local partners (see dataset specific metadata under Data_Set_Credit for details). Edwin Abbey, FDEP, DEAR, Environmental Manager 20051121 unknown vector digital data Reston, Virginia U.S. Geological Survey The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water bodies. Reaches are also defined on waterbodies and the approximate shorelines of the Great Lakes, the Atlantic and Pacific Oceans and the Gulf of Mexico. The NHD also incorporates the National Spatial Data Infrastructure framework criteria established by the Federal Geographic Data Committee. The NHD is a national framework for assigning reach addresses to water-related entities, such as industrial discharges, drinking water supplies, fish habitat areas, wild and scenic rivers. Reach addresses establish the locations of these entities relative to one another within the NHD surface water drainage network, much like addresses on streets. Once linked to the NHD by their reach addresses, the upstream/downstream relationships of these water-related entities--and any associated information about them--can be analyzed using software tools ranging from spreadsheets to geographic information systems (GIS). GIS can also be used to combine NHD-based network analysis with other data layers, such as soils, land use and population, to help understand and display their respective effects upon one another. Furthermore, because the NHD provides a nationally consistent framework for addressing and analysis, water-related information linked to reach addresses by one organization (national, state, local) can be shared with other organizations and easily integrated into many different types of applications to the benefit of all. 19990623 20170426 Ending Date refers to last known date features were updated in the NHD database. See dataset specific metadata. In work Biannually -88.089379 -79.731638 31.630800 24.444865 U.S. Department of Commerce, 1977, Countries, dependencies, areas of special sovereignty, and their principal administrative divisions (Federal Information Processing Standards 10-3): Washington, D.C., National Institute of Standards and Technology. FL US Florida oceans inlandWaters environment Lake / Pond Reservoir geoscientificInformation Artificial Path Hydrography Swamp / Marsh boundaries Stream / River Reach Code Spring / Seep Canal / Ditch Water Resources (Inland) None None. Acknowledgment of the originating agencies would be appreciated in products derived from these data. FDEP, DEAR Edwin Abbey Environmental Manager mailing and physical

2600 Blair Stone Rd

Tallahassee FL 32399-2400 US 850-245-8550 Edwin.Abbey@dep.state.fl.us Earth Science Information Center, U.S. Geological Survey mailing

507 National Center

Reston VA 20192 US 1 888 ASK USGS ask@usgs.gov 0800-1600 Eastern Time In addition to the address above there are other ESIC offices throughout the country. A full list of these offices is at URL: http://mapping.usgs.gov/esic/esic_index.html USGS, FDEP, Division of Environmental Assessment and Restoration Version 6.2 (Build 9200) ; Esri ArcGIS 10.3.1.4959 Statements of attribute accuracy are based on accuracy statements made for U.S. Geological Survey Digital Line Graph (DLG) data, which is estimated to be 98.5 percent. One or more of the following methods were used to test attribute accuracy: manual comparison of the source with hardcopy plots; symbolized display of the DLG on an interactive computer graphic system; selected attributes that could not be visually verified on plots or on screen were interactively queried and verified on screen. In addition, software validated feature types and characteristics against a master set of types and characteristics, checked that combinations of types and characteristics were valid, and that types and characteristics were valid for the delineation of the feature. Feature types, characteristics, and other attributes conform to the Standards for National Hydrography Dataset (USGS, 1999) as of the date they were loaded into the database. All names were validated against a current extract from the Geographic Names Information System (GNIS). The entry and identifier for the names match those in the GNIS. The association of each name to reaches has been interactively checked, however, operator error could in some cases apply a name to a wrong reach. This statement is generally true for the most common sources of NHD data. Other sources and methods may have been used to create or update NHD data. In some cases, additional information may be found in the NHDMetadata table. Points, nodes, lines, and areas conform to topological rules. Lines intersect only at nodes, and all nodes anchor the ends of lines. Lines do not overshoot or undershoot other lines where they are supposed to meet. There are no duplicate lines. Lines bound areas and lines identify the areas to the left and right of the lines. Gaps and overlaps among areas do not exist. All areas close. The completeness of the data reflects the content of the sources, which most often are the published USGS topographic quadrangle and/or the USDA Forest Service Primary Base Series (PBS) map. The USGS topographic quadrangle is usually supplemented by Digital Orthophoto Quadrangles (DOQs). Features found on the ground may have been eliminated or generalized on the source map because of scale and legibility constraints. In general, streams longer than one mile (approximately 1.6 kilometers) were collected. Most streams that flow from a lake were collected regardless of their length. Only definite channels were collected so not all swamp/marsh features have stream/rivers delineated through them. Lake/ponds having an area greater than 6 acres were collected. Note, however, that these general rules were applied unevenly among maps during compilation. Reaches codes are defined on all features of type stream/river, canal/ditch, artificial path, coastline, and connector. Waterbody reach codes are defined on all lake/pond and most reservoir features. Names were applied from the GNIS database. Detailed capture conditions are provided for every feature type in the Standards for National Hydrography Dataset available online through http://mapping.usgs.gov/standards/. This statement is generally true for the most common sources of NHD data. Other sources and methods may have been used to create or update NHD data. In some cases, additional information may be found in the NHDMetadata table. Statements of horizontal positional accuracy are based on accuracy statements made for U.S. Geological Survey topographic quadrangle maps. These maps were compiled to meet National Map Accuracy Standards. For horizontal accuracy, this standard is met if at least 90 percent of points tested are within 0.02 inch (at map scale) of the true position. Additional offsets to positions may have been introduced where feature density is high to improve the legibility of map symbols. In addition, the digitizing of maps is estimated to contain a horizontal positional error of less than or equal to 0.003 inch standard error (at map scale) in the two component directions relative to the source maps. Visual comparison between the map graphic (including digital scans of the graphic) and plots or digital displays of points, lines, and areas, is used as control to assess the positional accuracy of digital data. Digital map elements along the adjoining edges of data sets are aligned if they are within a 0.02 inch tolerance (at map scale). Features with like dimensionality (for example, features that all are delineated with lines), with or without like characteristics, that are within the tolerance are aligned by moving the features equally to a common point. Features outside the tolerance are not moved; instead, a feature of type connector is added to join the features. This statement is generally true for the most common sources of NHD data. Other sources and methods may have been used to create or update NHD data. In some cases, additional information may be found in the NHDMetadata table. Statements of vertical positional accuracy for elevation of water surfaces are based on accuracy statements made for U.S. Geological Survey topographic quadrangle maps. These maps were compiled to meet National Map Accuracy Standards. For vertical accuracy, this standard is met if at least 90 percent of well-defined points tested are within one-half contour interval of the correct value. Elevations of water surface printed on the published map meet this standard; the contour intervals of the maps vary. These elevations were transcribed into the digital data; the accuracy of this transcription was checked by visual comparison between the data and the map. This statement is generally true for the most common sources of NHD data. Other sources and methods may have been used to create or update NHD data. In some cases, additional information may be found in the NHDMetadata table. In June 2013, the existing Florida NHD100K and NHD 24K as downloaded April 10, 2013 from the USGS NHD, Hydrologic Units, GNIS alternate names and relationships were combined into one file geodatabase for public distribution and use. Notable changes to the 24K NHD database since the previous download in December 2012 are as follows: Full photo revision to Lake Okeechobee (03090201), Hillsborough (03100205) and Alafia (03100204) sub basins; Full photo revision to portions of Peace (03100101), Withlacoochee (03100208), Choctawatchee Bay (03140102), miscellaneous updates in Big Cypress Swamp (03090204) and Everglades (03090202); miscellaneous edits/additions of stream gages, dams and other point event features by USGS. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings. 20130601 Data updated in ArcSDE/DataMiner and MapDirect. Metadata updated. 20130824 In November 2013, the existing Florida NHD100K and NHD 24K as downloaded November 12, 2013 from the USGS NHD, Hydrologic Units, GNIS alternate names and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download in April 2012 were in the following subbasins: Withlacoochee (03100208), Peace (03100101), Upper St. Johns (03080101), Kissimmee (03090101), Florida Southeast Coast (03090206), Choctawhatchee Bay (03140102), Lower Choctawhatchee (03140203) and assorted network improvements made by USGS staff. 20131101 Data updated in ArcSDE/DataMiner and MapDirect. Metadata updated. 20131208 In May 2014, the existing Florida NHD100K and NHD 24K as downloaded May 12, 2014 from the USGS NHD, Hydrologic Units, GNIS alternate names and relationships were combined into one file geodatabase for public distribution and use. Notable changes to the 24K NHD database since the previous download in November 2013 are as follows: Aerial imagery revision to priority WBIDs ( Waterbody IDs provided by DEP Water Assessment Section), other WBIDs and network improvements by USGS to Tampa Bay (03100206), Crystal-Pithlachascotee (03100207), Withlacoochee (03110203), Charlotte Harbor (03100103), St. Andrew-St. Joseph Bays (03140101), Vero Beach (03080203), Everglades (03090202), Blackwater (03140104), Manatee (03100202), Econfina-Steinhatchee (03110102), Caloosahatchee (03090205), Perdido (03140106), Florida Southeast Coast (03090206), Lake Okeechobee (03090201), Cumberland-St. Simons (03070203), Santa Fe (03110206), Alapaha (03110202), Aucilla (03110103), Lower Ochlockonee (03120003), Cape Canaveral (03080202), Nassau (03070205), Upper Suwannee (03110201), Myakka (03100102), Chipola (03130012), Pensacola Bay (03140105), Upper St. Johns (03080101), Lower St. Johns (03080103), Oklawaha (03080102), Little Manatee (03100203), Waccasassa (03110101), Apalachee Bay-St. Marks (03120001), Western Okeechobee Inflow (03090103), Northern Okeechobee Inflow (03090102), St. Marys (03070204), Daytona-St. Augustine (03080201), Kissimmee (03090101), Lower Suwannee (03110205), Big Cypress Swamp (03090204), Peace (03100101), Yellow (03140103), . The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings. 20140512 The processes used to create and maintain high-resolution NHD data can be found in the table called "NHDMetadata". Because NHD data can be downloaded using several user-defined areas, the process descriptions can vary for each download. The NHDMetadata table contains a list of all the process descriptions that apply to a particular download. These process descriptions are linked using the DuuID to the NHDFeatureToMetadata table which contains the com_ids of all the features within the download. In addition, another table, the NHDSourceCitation, can also be linked through the DuuID to determine the sources used to create or update NHD data. 20140512 In October 2014, the existing Florida NHD100K and NHD 24K as downloaded October 22, 2014 from the USGS NHD, Hydrologic Units, GNIS alternate names and relationships were combined into one file geodatabase for public distribution and use. Notable changes to the 24K NHD database since the previous download in May 2014 are as follows: Geographic Information Names System (GNIS) specific updates, aerial imagery based updates to prioritized Florida DEP Waterbody IDs (WBIDs), and/or additional aerial imagery based updates to St. Marys (3070204), Nassau (3070205), Upper St. Johns (3080101), Lower St. Johns (3080103), Daytona-St. Augustine (3080201), Cape Canaveral (3080202), Vero Beach (3080203), Kissimmee (3090101), Big Cypress Swamp (3090204), Caloosahatchee (3090205), Florida Southeast Coast (3090206), Crystal-Pithlachascotee (3100207), Econfina-Steinhatchee (3110102), Aucilla (3110103), Apalachee Bay-St. Marks (3120001), Lower Ochlockonee (3120003), Apalachicola (3130011), New (3130013), Apalachicola Bay (3130014), St. Andrew-St. Josephs Bays (3140101), Choctawhatchee Bay (3140102), Yellow (3140103), Blackwater (3140104), Pensacola Bay (3140105), Perdido (3140106), Perdido Bay (3140107), Lower Choctawhatchee (3140203) and Escambia (3140305) sub basins. 20141022 An October 22, 2014 copy of the Florida NHD was obtained from the USGS for purposes of updating the Florida Dept. of Environmental Protection Agencies SDE data. For this release, a new field called “Parent_Feature”was added to the NHDFlowline featureclass. Using Field Calculator, the “Parent_Feature” attribute for flowline features with FType not equal to Artificial Path were updated to the FType. For artificial path flowlines, a series of analyses using the relationship between the WBArea_Permanent_identifier field and the Permanent_identifier fields of each of the NHDArea and NHDWaterbody featureclasses facilitated the update of the Parent_Feature attribute. Several “select by location” analyses further provided updated to the “Parent_Feature.” Several hundred artificial paths remained after exhausting multiple analysis options and were ultimately individually inspected to see the relationship between the artificial path and the feature for which it was within. 20141201 Changes in the October 2014 download of the Florida NHD include new and updated NHD Point Events. These EventTypes follow the same format as the FCodes in the other featureclasses. Added detail has been incorporated for stream gages. Stream gages are now listed as being active (with continuous or partial data) or inactive. Dams are still included, but like the others, the code has changed. Past layer files referencing the NHDPointEvents featureclass will need updated symbology to link to the new codes. The layer file used on the FDEP DataMiner application has been updated to reflect the updates. New codes are as follows: 57001 - Stream Gage, Active, Continuous data; 57002 - Stream Gage, Active, Partial data; 57003 - Stream Gage, Inactive; 57100 - Dam. 20141208 Data updated in the GIS library 20150107 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section mailing and physical

2600 Blair Stone Rd MS 6520

Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us In May 2015, the Florida NHD 100K (as of March 25, 2015) and NHD 24K (as of March 17, 2015) including Watershed Boundary Dataset Hydrologic Units, GNIS alternate names and relationships were combined into one file geodatabase for public distribution and use. Notable changes to the 24K NHD database since the previous download in October 2014 are as follows: Geographic Information Names System (GNIS) specific updates in St. Marys (03070204), Nassau (03070205), Lower St. Johns (03080103), Caloosahatchee (03090205), Myakka (03100102), Sarasota Bay (03100201), Manatee (03100202), Little Manatee (03100203), Hillsborough (03100205), Withlacoochee (03100208), Waccasassa (03110101), Upper Suwannee (03110201), Alapaha (03110202), Withlacoochee (03110203), Lower Suwannee (03110205), Santa Fe (03110206), Lower Chattahoochee (03130004), Chipola (03130012), St. Andrew-St. Joseph Bays (03140101) & Pea (03140202) subbasins; Aerial Imagery Revision in Upper St. Johns (03080101), Western Okeechobee Inflow (03090103), Lake Okeechobee (03090201), Everglades (03090202), Florida Bay-Florida Keys (03090203), Big Cypress Swamp (03090204), Florida Southeast Coast (03090206), Alafia (03100204), Aucilla (03110103), Lower Suwannee (03110205), Blackwater (03140104), Pensacola Bay (03140105) & Perdido (03140106) subbasins. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace connected features through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to and be limited to the maximum scale set the NHD24K and NHDFlowline scale dependency settings. If this happens, to see the full set of selected features, change both the layer and group settings to “Show layer at all scales”, unclick the NHD 100K and Major NHD 100K group layers, and then zoom to the selected features again. Additionally, a new field in the 24K NHD Flowline featureclass has been added to support the analysis of Flowline features. The ‘Parent_Feature’ identifies the feature type of the flowline in all cases except for Artificial Paths. For Artificial paths, the feature type of the polygon feature it resides in has been used. 20150410 Data updated in the GIS library. 20150501 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section mailing and physical

2600 Blair Stone Rd MS 6520

Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us In December 2015, the Florida NHD 100K (as of March 25, 2015) and NHD 24K (as of October 22, 2015) including Watershed Boundary Dataset Hydrologic Units, GNIS alternate names and relationships were combined into one file geodatabase for public distribution and use. Notable changes to the 24K NHD database since the previous download in October 2014 are as follows: Edits performed by the Florida stewardship team in Alafia (03100204), Big Cypress Swamp (03090204), Blackwater (03140104), Crystal-Pithlachascotee (03100207), Econfina-Steinhatchee (03110102), Everglades (03090202), Florida Bay-Florida Keys (03090203), Lake Okeechobee (03090201), Lower Choctawhatchee (03140203), Lower Ochlockonee (03120003), Lower Suwannee (03110205), Pensacola Bay (03140105), St. Andrew-St. Joseph Bays (03140101), St. Marys (03070204), and Upper St. Johns (03080101) subbasins; Edits performed by USGS for attribute updates, connectivity checks and updating m-values in Alafia (03100204), Alapaha (03110202), Apalachee Bay-St. Marks (03120001), Apalachicola (03130011), Aucilla (03110103), Big Cypress Swamp (03090204), Blackwater (03140104), Caloosahatchee (03090205), Chipola (03130012), Choctawhatchee Bay (03140102), Daytona-St. Augustine (03080201), Escambia (03140305), Florida Southeast Coast (03090206), Kissimmee (03090101), Lake Okeechobee (03090201), Little Manatee (03100203), Lower Choctawhatchee (03140203), Lower Conecuh (03140304), Lower Ochlockonee (03120003), Lower St. Johns (03080103), Lower Suwannee (03110205), New (03130013), Oklawaha (03080102), Pensacola Bay (03140105), and Perdido (03140106) subbasins. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings. Additionally, a new field in the 24K NHD Flowline featureclass has been added to support the analysis of Flowline features. The “Parent_Feature” identifies the feature type of the flowline in all cases except for Artificial Paths. For Artificial paths, the feature type of the polygon feature it resides in has been used. See process step for additional information. It was realized that the US Board on Geographic Names doesn't recognize Atlantic Ocean along the western side of the state. The Florida stewardship team was in the process of removing these polygons but not all the edits made it into this original version of the NHD. After downloading the October 22, 2015 version of the NHD, the remaining Atlantic Ocean polygons in the Gulf were manually removed and currently match the federal database. The NHD editing process officially removed the polygons from the national database using the USGS tools in November. 20151116 FDEP, DEAR Edwin Abbey Environmental Manager mailing and physical

2600 Blair Stone Rd

Tallahassee FL 32399-2400 US 850-245-8550 Edwin.Abbey@dep.state.fl.us Data updated in the GIS library. 20151208 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section mailing and physical

2600 Blair Stone Rd MS 6520

Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us Added NOAA- NFHAP Estuarine Zones layer in the NHD layer published in DataMiner. 20160225 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section mailing and physical

2600 Blair Stone Rd MS 6520

Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us In April 2016, the existing Florida NHD100K and NHD 24K as downloaded February 25, 2016 from the USGS NHD, Hydrologic Units, GNIS alternate names and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download were in the following subbasins: Apalachee Bay-St. Marks, Apalachicola Bay, Big Cypress Swamp, Charlotte Harbor, Choctawhatchee Bay, Escambia, Everglades, Kissimmee, Lower Choctawhatchee, Lower Suwannee, Myakka, St. Andrew-St. Joseph Bays, Upper St. Johns, and Western Okeechobee Inflow and assorted network improvements made by USGS staff. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings. 20160426 FDEP, DEAR Edwin Abbey Environmental Manager mailing and physical

2600 Blair Stone Rd

Tallahassee FL 32399-2400 US 850-245-8550 Edwin.Abbey@dep.state.fl.us Data updated in SDE and DataMiner. Metadata updated. 20160506 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section mailing and physical

2600 Blair Stone Rd MS 6520

Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us In October 2016, the existing Florida NHD100K and NHD 24K as downloaded September 5, 2016 from the USGS NHD, Hydrologic Units, GNIS alternate names and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download were in the following subbasins: Big Cypress Swamp, Caloosahatchee, Cape Canaveral, Daytona-St. Augustine, Econfina-Steinhatchee, Everglades, Kissimmee, Lake Okeechobee, Lower Ochlockonee, New, St. Andrew-St. Joseph Bays, Upper St. Johns, Oklawaha, Vero Beach and includes assorted network improvements made by USGS staff. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings. 20161003 FDEP, DEAR Edwin Abbey Environmental Manager mailing and physical

2600 Blair Stone Rd

Tallahassee FL 32399-2400 US 850-245-8550 Edwin.Abbey@dep.state.fl.us Revised data obtained from DEAR as part of the biannual NHD update and updated the same in the GIS library. Metadata updated. 20161209 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section mailing and physical

2600 Blair Stone Rd MS 6520

Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us In January 2017, the existing Florida NHD100K and NHD 24K as downloaded January 17, 2017 from the USGS NHD, Hydrologic Units, GNIS alternate names (from December 1, 2016) and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download were in the following subbasins: Florida Southeast Coast (03090206), Apalachicola (03130011), St. Andrew-St. Joseph Bays (03140101) and assorted network improvements made by USGS staff in St. Andrew-St. Joseph Bays (03140101). The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings.Relationship classes have been created to identify additional names that features may be known by through the Variant Names table. Relationship classes have also been created to facilitate the identification of which waterbody or area a flowline traverses through based on the WBAreaPermanent_ID field. 20170124 FDEP, DEAR Edwin Abbey Environmental Manager mailing and physical

2600 Blair Stone Rd

Tallahassee FL 32399-2400 US 850-245-8550 Edwin.Abbey@dep.state.fl.us Revised data obtained from DEAR as part of the biannual NHD update and updated the same in the GIS library. Metadata updated. 20170217 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section mailing and physical

2600 Blair Stone Rd MS 6520

Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us In June 2017, the existing Florida NHD100K and NHD 24K as downloaded May 1, 2017 from the USGS NHD, Hydrologic Units, GNIS alternate names (from June 1, 2017) and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download were in the following subbasins: Florida Southeast Coast (03090206), Withlacoochee (0300208), Little Manatee (03100203), Everglades (03090202), and Econfina-Steinhatchee (03110102). In preperation for the NHDPlusHR, 39 basins received minor edits to fix USGS Severity 1 and 3 errors. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings.Relationship classes have been created to identify additional names that features may be known by through the Variant Names table. Relationship classes have also been created to facilitate the identification of which waterbody or area a flowline traverses through based on the WBAreaPermanent_ID field. 20170623 Revised data obtained from DEAR as part of the biannual NHD update and updated the same in the GIS library. Metadata updated. 20170728 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section mailing and physical

2600 Blair Stone Rd MS 6520

Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us 20170728 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section mailing and physical

2600 Blair Stone Rd

MS 6520

Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time Flowline100K 446585.910310 638549.285569 1204176.280991 1396194.142361 1 002 Projected GCS_North_American_1983 Linear Unit: Foot_US (0.304801) NAD_1983_StatePlane_Florida_West_FIPS_0902_Feet <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/10.7'><WKT>PROJCS[&quot;NAD_1983_StatePlane_Florida_West_FIPS_0902_Feet&quot;,GEOGCS[&quot;GCS_North_American_1983&quot;,DATUM[&quot;D_North_American_1983&quot;,SPHEROID[&quot;GRS_1980&quot;,6378137.0,298.257222101]],PRIMEM[&quot;Greenwich&quot;,0.0],UNIT[&quot;Degree&quot;,0.0174532925199433]],PROJECTION[&quot;Transverse_Mercator&quot;],PARAMETER[&quot;False_Easting&quot;,656166.6666666665],PARAMETER[&quot;False_Northing&quot;,0.0],PARAMETER[&quot;Central_Meridian&quot;,-82.0],PARAMETER[&quot;Scale_Factor&quot;,0.9999411764705882],PARAMETER[&quot;Latitude_Of_Origin&quot;,24.33333333333333],UNIT[&quot;Foot_US&quot;,0.3048006096012192],AUTHORITY[&quot;EPSG&quot;,2237]]</WKT><XOrigin>-17791300</XOrigin><YOrigin>-41645400</YOrigin><XYScale>3048.0060960121928</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>0</MOrigin><MScale>8000</MScale><XYTolerance>0.0032808333333333331</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.002</MTolerance><HighPrecision>true</HighPrecision><WKID>102659</WKID><LatestWKID>2237</LatestWKID></ProjectedCoordinateSystem> 20250602 17491300 20250602 17493100 1.0 500000 5000 NAP 20231220 13272700 FGDC CSDGM Metadata FALSE Simple FALSE 998 TRUE TRUE Flowline100K Feature Class 998 OBJECTID OBJECTID OID 4 10 0 Internal feature number. Esri Sequential unique whole numbers that are automatically generated. PERMANENT_IDENTIFIER Permanent_Identifier String 40 0 0 FDATE FDate Date 8 0 0 RESOLUTION Resolution Integer 4 10 0 GNIS_ID GNIS_ID String 10 0 0 GNIS_NAME GNIS_Name String 65 0 0 LENGTHKM LengthKM Double 8 38 8 REACHCODE ReachCode String 14 0 0 FLOWDIR FlowDir Integer 4 10 0 WBAREA_PERMANENT_IDENTIFIER WBArea_Permanent_Identifier String 40 0 0 FTYPE FType Integer 4 10 0 FCODE FCode Integer 4 10 0 ENABLED Enabled SmallInteger 2 5 0 THINNERCODE THINNERCODE SmallInteger 2 5 0 SHAPE Shape Geometry 4 0 0 Feature geometry. Esri Coordinates defining the features. Connector 334 RESOLUTION 2 Resolution Coded Value Default value Duplicate GIS Integer FLOWDIR 0 HydroFlowDirections Coded Value Default value Duplicate GIS Integer FCODE 33400 Connector FCode Known, but unspecific, connection between two nonadjacent network segments. Coded Value Default value Duplicate GIS Integer ENABLED 1 EnabledDomain Coded Value Default value Default value GIS SmallInteger Enabled 1 EnabledDomain Coded Value Default value Default value SmallInteger CanalDitch 336 RESOLUTION 2 Resolution Coded Value Default value Duplicate GIS Integer FLOWDIR 0 HydroFlowDirections Coded Value Default value Duplicate GIS Integer FCODE 33600 CanalDitch FCode Artificial open waterway constructed to transport water, to irrigate or drain land, to connect two or more bodies of water, or to serve as a waterway for watercraft. Coded Value Default value Duplicate GIS Integer ENABLED EnabledDomain Coded Value Default value Default value GIS SmallInteger 1 Enabled 1 EnabledDomain Coded Value Default value Default value SmallInteger Undergorund Conduit 420 RESOLUTION 2 Resolution Coded Value Default value Duplicate GIS Integer FLOWDIR 0 HydroFlowDirections Coded Value Default value Duplicate GIS Integer FCODE 42000 Underground Conduit FCode Underground passage of surface water. Coded Value Default value Duplicate GIS Integer ENABLED EnabledDomain Coded Value Default value Default value GIS SmallInteger 1 Enabled 1 EnabledDomain Coded Value Default value Default value SmallInteger Pipeline 428 RESOLUTION 2 Resolution Coded Value Default value Duplicate GIS Integer FLOWDIR 0 HydroFlowDirections Coded Value Default value Duplicate GIS Integer FCODE 42805 Pipeline FCode Closed conduit with pumps, valves, and control devices, for conveying fluids, gases, or finely divided solids. Coded Value Default value Duplicate GIS Integer ENABLED EnabledDomain Coded Value Default value Default value GIS SmallInteger 1 Enabled 1 EnabledDomain Coded Value Default value Default value SmallInteger StreamRiver 460 RESOLUTION 2 Resolution Coded Value Default value Duplicate GIS Integer FLOWDIR 0 HydroFlowDirections Coded Value Default value Duplicate GIS Integer FCODE 46003 StreamRiver FCode Body of flowing water. Coded Value Default value Duplicate GIS Integer ENABLED EnabledDomain Coded Value Default value Default value GIS SmallInteger 1 Enabled 1 EnabledDomain Coded Value Default value Default value SmallInteger ArtificialPath 558 RESOLUTION 2 Resolution Coded Value Default value Duplicate GIS Integer FLOWDIR 0 HydroFlowDirections Coded Value Default value Duplicate GIS Integer FCODE 55800 ArtificialPath FCode Abstraction to facilitate hydrologic modeling through open water bodies and along coastal and Great Lakes shorelines and to act as a surrogate for lakes and other water bodies. Coded Value Default value Duplicate GIS Integer ENABLED EnabledDomain Coded Value Default value Default value GIS SmallInteger 1 Enabled 1 EnabledDomain Coded Value Default value Default value SmallInteger Coastline 566 RESOLUTION 2 Resolution Coded Value Default value Duplicate GIS Integer FLOWDIR 0 HydroFlowDirections Coded Value Default value Duplicate GIS Integer FCODE 56600 Coastline FCode Line that follows the main outline of the land, including bays, but crosses rivers at their mouth. In the NHD, the outline of selected coastal islands are included as part of the coastline. Coded Value Default value Duplicate GIS Integer ENABLED EnabledDomain Coded Value Default value Default value GIS SmallInteger 1 Enabled 1 EnabledDomain Coded Value Default value Default value SmallInteger LastUpdate LastUpdate Date 8 0 0 SHAPE.STLength() SHAPE.STLength() Double 0 0 0 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section 2600 Blair Stone Rd MS 6520 Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us 20231103 ArcGIS Metadata 1.0 GIS.Flowline100K 2005-11-21T00:00:00 2023-11-03T00:00:00 U.S. Geological Survey in cooperation with U.S. Environmental Protection Agency, USDA Forest Service, and other Federal, State and local partners (see dataset specific metadata under Data_Set_Credit for details). U.S. Geological Survey Reston, Virginia vector digital data Param Maharaj FDEP, DEAR, Watershed Services Program Environmental Specialist III 850-245-8551 2600 Blair Stone Rd Tallahassee FL 32399-2400 US Param.Maharaj@floridadep.gov Param Maharaj Param Maharaj <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water bodies. Reaches are also defined on waterbodies and the approximate shorelines of the Great Lakes, the Atlantic and Pacific Oceans and the Gulf of Mexico. The NHD also incorporates the National Spatial Data Infrastructure framework criteria established by the Federal Geographic Data Committee.</SPAN></P></DIV></DIV></DIV> This dataset is a national framework for assigning reach addresses to water-related entities, such as industrial discharges, drinking water supplies, fish habitat areas, wild and scenic rivers within Hillsborough County. Reach addresses establish the locations of these entities relative to one another within the NHD surface water drainage network, much like addresses on streets. Once linked to the NHD by their reach addresses, the upstream/downstream relationships of these water-related entities--and any associated information about them--can be analyzed using software tools ranging from spreadsheets to geographic information systems (GIS). GIS can also be used to combine NHD-based network analysis with other data layers, such as soils, land use and population, to help understand and display their respective effects upon one another. Furthermore, because the NHD provides a nationally consistent framework for addressing and analysis, water-related information linked to reach addresses by one organization (national, state, local) can be shared with other organizations and easily integrated into many different types of applications to the benefit of all. United States Geological Survey (USGS) Florida Department of Environmental Protection (FDEP) Hillsborough County, FL Earth Science Information Center, U.S. Geological Survey 1 888 ASK USGS 507 National Center Reston VA 20192 US ask@usgs.gov 0800-1600 Eastern Time WATER LOCATION REFERENCE HYDRO FLOW LINE 100K <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Hillsborough County makes no warranty, representation or guarantee as to the content, sequence, accuracy, timeliness, or completeness of any of the information provided herein. The reader should not rely on the data provided herein for any reason. Hillsborough County explicitly disclaims any representations and warranties, including, without limitation, the implied warranties of merchantability and fitness for a particular purpose. Hillsborough County shall assume no liability for: 1. Any errors, omissions, or inaccuracies in the information provided regardless of how caused; or 2. Any decision made or action taken or not taken by any person in reliance upon any information or data furnished hereunder. This dataset is provided by Hillsborough County for informational purposes and Hillsborough County does not guarantee the accuracy or content of the data. Hillsborough County is not liable for any deficiencies in the dataset or analyses/applications using the dataset. This data should not be construed as legal advice or legal opinion on any specific facts or circumstances. The contents are intended for general information purposes only, and you are urged to consult your own lawyer concerning your own situation and any specific questions you may have. Infrastructure records, drawings, and other documents have been gathered over many decades, using differing standards for quality control, documentation and verification. All of the data provided represents current information in a readily available format. While the data is generally believed to be accurate, occasionally it proves to be incorrect; thus its accuracy is not warranted. Prior to making any property purchases or investments, or taking any other action based in full or in part upon the material provided, it is specifically advised that you independently field verify the information contained in county records.</SPAN></P></DIV></DIV></DIV> Version 6.2 (Build 9200) ; Esri ArcGIS 10.7.1.11595 1 -82.650515 -82.054419 28.174622 27.644953 Param Maharaj FDEP, DEAR, Watershed Services Program Florida NHD Steward 850-245-8551 2600 Blair Stone Rd Tallahassee FL 32399-2400 US Param.Maharaj@floridadep.gov Param Maharaj Param Maharaj Points, nodes, lines, and areas conform to topological rules. Lines intersect only at nodes, and all nodes anchor the ends of lines. Lines do not overshoot or undershoot other lines where they are supposed to meet. There are no duplicate lines. Lines bound areas and lines identify the areas to the left and right of the lines. Gaps and overlaps among areas do not exist. All areas close. Points, nodes, lines, and areas conform to topological rules. Lines intersect only at nodes, and all nodes anchor the ends of lines. Lines do not overshoot or undershoot other lines where they are supposed to meet. There are no duplicate lines. Lines bound areas and lines identify the areas to the left and right of the lines. Gaps and overlaps among areas do not exist. All areas close. The completeness of the data reflects the content of the sources, which most often are the published USGS topographic quadrangle and/or the USDA Forest Service Primary Base Series (PBS) map. The USGS topographic quadrangle is usually supplemented by Digital Orthophoto Quadrangles (DOQs). Features found on the ground may have been eliminated or generalized on the source map because of scale and legibility constraints. In general, streams longer than one mile (approximately 1.6 kilometers) were collected. Most streams that flow from a lake were collected regardless of their length. Only definite channels were collected so not all swamp/marsh features have stream/rivers delineated through them. Lake/ponds having an area greater than 6 acres were collected. Note, however, that these general rules were applied unevenly among maps during compilation. Reaches codes are defined on all features of type stream/river, canal/ditch, artificial path, coastline, and connector. Waterbody reach codes are defined on all lake/pond and most reservoir features. Names were applied from the GNIS database. Detailed capture conditions are provided for every feature type in the Standards for National Hydrography Dataset available online through http://mapping.usgs.gov/standards/. This statement is generally true for the most common sources of NHD data. Other sources and methods may have been used to create or update NHD data. In some cases, additional information may be found in the NHDMetadata table. Statements of attribute accuracy are based on accuracy statements made for U.S. Geological Survey Digital Line Graph (DLG) data, which is estimated to be 98.5 percent. One or more of the following methods were used to test attribute accuracy: manual comparison of the source with hardcopy plots; symbolized display of the DLG on an interactive computer graphic system; selected attributes that could not be visually verified on plots or on screen were interactively queried and verified on screen. In addition, software validated feature types and characteristics against a master set of types and characteristics, checked that combinations of types and characteristics were valid, and that types and characteristics were valid for the delineation of the feature. Feature types, characteristics, and other attributes conform to the Standards for National Hydrography Dataset (USGS, 1999) as of the date they were loaded into the database. All names were validated against a current extract from the Geographic Names Information System (GNIS). The entry and identifier for the names match those in the GNIS. The association of each name to reaches has been interactively checked, however, operator error could in some cases apply a name to a wrong reach. This statement is generally true for the most common sources of NHD data. Other sources and methods may have been used to create or update NHD data. In some cases, additional information may be found in the NHDMetadata table. Statements of horizontal positional accuracy are based on accuracy statements made for U.S. Geological Survey topographic quadrangle maps. These maps were compiled to meet National Map Accuracy Standards. For horizontal accuracy, this standard is met if at least 90 percent of points tested are within 0.02 inch (at map scale) of the true position. Additional offsets to positions may have been introduced where feature density is high to improve the legibility of map symbols. In addition, the digitizing of maps is estimated to contain a horizontal positional error of less than or equal to 0.003 inch standard error (at map scale) in the two component directions relative to the source maps. Visual comparison between the map graphic (including digital scans of the graphic) and plots or digital displays of points, lines, and areas, is used as control to assess the positional accuracy of digital data. Digital map elements along the adjoining edges of data sets are aligned if they are within a 0.02 inch tolerance (at map scale). Features with like dimensionality (for example, features that all are delineated with lines), with or without like characteristics, that are within the tolerance are aligned by moving the features equally to a common point. Features outside the tolerance are not moved; instead, a feature of type connector is added to join the features. This statement is generally true for the most common sources of NHD data. Other sources and methods may have been used to create or update NHD data. In some cases, additional information may be found in the NHDMetadata table. Statements of vertical positional accuracy for elevation of water surfaces are based on accuracy statements made for U.S. Geological Survey topographic quadrangle maps. These maps were compiled to meet National Map Accuracy Standards. For vertical accuracy, this standard is met if at least 90 percent of well-defined points tested are within one-half contour interval of the correct value. Elevations of water surface printed on the published map meet this standard; the contour intervals of the maps vary. These elevations were transcribed into the digital data; the accuracy of this transcription was checked by visual comparison between the data and the map. This statement is generally true for the most common sources of NHD data. Other sources and methods may have been used to create or update NHD data. In some cases, additional information may be found in the NHDMetadata table. In June 2013, the existing Florida NHD100K and NHD 24K as downloaded April 10, 2013 from the USGS NHD, Hydrologic Units, GNIS alternate names and relationships were combined into one file geodatabase for public distribution and use. Notable changes to the 24K NHD database since the previous download in December 2012 are as follows: Full photo revision to Lake Okeechobee (03090201), Hillsborough (03100205) and Alafia (03100204) sub basins; Full photo revision to portions of Peace (03100101), Withlacoochee (03100208), Choctawatchee Bay (03140102), miscellaneous updates in Big Cypress Swamp (03090204) and Everglades (03090202); miscellaneous edits/additions of stream gages, dams and other point event features by USGS. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings. 2013-06-01T00:00:00 Data updated in ArcSDE/DataMiner and MapDirect. Metadata updated. 2013-08-24 In November 2013, the existing Florida NHD100K and NHD 24K as downloaded November 12, 2013 from the USGS NHD, Hydrologic Units, GNIS alternate names and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download in April 2012 were in the following subbasins: Withlacoochee (03100208), Peace (03100101), Upper St. Johns (03080101), Kissimmee (03090101), Florida Southeast Coast (03090206), Choctawhatchee Bay (03140102), Lower Choctawhatchee (03140203) and assorted network improvements made by USGS staff. 2013-11-01 Data updated in ArcSDE/DataMiner and MapDirect. Metadata updated. 2013-12-08 The processes used to create and maintain high-resolution NHD data can be found in the table called "NHDMetadata". Because NHD data can be downloaded using several user-defined areas, the process descriptions can vary for each download. The NHDMetadata table contains a list of all the process descriptions that apply to a particular download. These process descriptions are linked using the DuuID to the NHDFeatureToMetadata table which contains the com_ids of all the features within the download. In addition, another table, the NHDSourceCitation, can also be linked through the DuuID to determine the sources used to create or update NHD data. 2014-05-12 In May 2014, the existing Florida NHD100K and NHD 24K as downloaded May 12, 2014 from the USGS NHD, Hydrologic Units, GNIS alternate names and relationships were combined into one file geodatabase for public distribution and use. Notable changes to the 24K NHD database since the previous download in November 2013 are as follows: Aerial imagery revision to priority WBIDs ( Waterbody IDs provided by DEP Water Assessment Section), other WBIDs and network improvements by USGS to Tampa Bay (03100206), Crystal-Pithlachascotee (03100207), Withlacoochee (03110203), Charlotte Harbor (03100103), St. Andrew-St. Joseph Bays (03140101), Vero Beach (03080203), Everglades (03090202), Blackwater (03140104), Manatee (03100202), Econfina-Steinhatchee (03110102), Caloosahatchee (03090205), Perdido (03140106), Florida Southeast Coast (03090206), Lake Okeechobee (03090201), Cumberland-St. Simons (03070203), Santa Fe (03110206), Alapaha (03110202), Aucilla (03110103), Lower Ochlockonee (03120003), Cape Canaveral (03080202), Nassau (03070205), Upper Suwannee (03110201), Myakka (03100102), Chipola (03130012), Pensacola Bay (03140105), Upper St. Johns (03080101), Lower St. Johns (03080103), Oklawaha (03080102), Little Manatee (03100203), Waccasassa (03110101), Apalachee Bay-St. Marks (03120001), Western Okeechobee Inflow (03090103), Northern Okeechobee Inflow (03090102), St. Marys (03070204), Daytona-St. Augustine (03080201), Kissimmee (03090101), Lower Suwannee (03110205), Big Cypress Swamp (03090204), Peace (03100101), Yellow (03140103), . The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings. 2014-05-12 In October 2014, the existing Florida NHD100K and NHD 24K as downloaded October 22, 2014 from the USGS NHD, Hydrologic Units, GNIS alternate names and relationships were combined into one file geodatabase for public distribution and use. Notable changes to the 24K NHD database since the previous download in May 2014 are as follows: Geographic Information Names System (GNIS) specific updates, aerial imagery based updates to prioritized Florida DEP Waterbody IDs (WBIDs), and/or additional aerial imagery based updates to St. Marys (3070204), Nassau (3070205), Upper St. Johns (3080101), Lower St. Johns (3080103), Daytona-St. Augustine (3080201), Cape Canaveral (3080202), Vero Beach (3080203), Kissimmee (3090101), Big Cypress Swamp (3090204), Caloosahatchee (3090205), Florida Southeast Coast (3090206), Crystal-Pithlachascotee (3100207), Econfina-Steinhatchee (3110102), Aucilla (3110103), Apalachee Bay-St. Marks (3120001), Lower Ochlockonee (3120003), Apalachicola (3130011), New (3130013), Apalachicola Bay (3130014), St. Andrew-St. Josephs Bays (3140101), Choctawhatchee Bay (3140102), Yellow (3140103), Blackwater (3140104), Pensacola Bay (3140105), Perdido (3140106), Perdido Bay (3140107), Lower Choctawhatchee (3140203) and Escambia (3140305) sub basins. 2014-10-22 An October 22, 2014 copy of the Florida NHD was obtained from the USGS for purposes of updating the Florida Dept. of Environmental Protection Agencies SDE data. For this release, a new field called “Parent_Feature”was added to the NHDFlowline featureclass. Using Field Calculator, the “Parent_Feature” attribute for flowline features with FType not equal to Artificial Path were updated to the FType. For artificial path flowlines, a series of analyses using the relationship between the WBArea_Permanent_identifier field and the Permanent_identifier fields of each of the NHDArea and NHDWaterbody featureclasses facilitated the update of the Parent_Feature attribute. Several “select by location” analyses further provided updated to the “Parent_Feature.” Several hundred artificial paths remained after exhausting multiple analysis options and were ultimately individually inspected to see the relationship between the artificial path and the feature for which it was within. 2014-12-01 Changes in the October 2014 download of the Florida NHD include new and updated NHD Point Events. These EventTypes follow the same format as the FCodes in the other featureclasses. Added detail has been incorporated for stream gages. Stream gages are now listed as being active (with continuous or partial data) or inactive. Dams are still included, but like the others, the code has changed. Past layer files referencing the NHDPointEvents featureclass will need updated symbology to link to the new codes. The layer file used on the FDEP DataMiner application has been updated to reflect the updates. New codes are as follows: 57001 - Stream Gage, Active, Continuous data; 57002 - Stream Gage, Active, Partial data; 57003 - Stream Gage, Inactive; 57100 - Dam. 2014-12-08 Data updated in the GIS library 2015-01-07 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section 2600 Blair Stone Rd MS 6520 Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us In May 2015, the Florida NHD 100K (as of March 25, 2015) and NHD 24K (as of March 17, 2015) including Watershed Boundary Dataset Hydrologic Units, GNIS alternate names and relationships were combined into one file geodatabase for public distribution and use. Notable changes to the 24K NHD database since the previous download in October 2014 are as follows: Geographic Information Names System (GNIS) specific updates in St. Marys (03070204), Nassau (03070205), Lower St. Johns (03080103), Caloosahatchee (03090205), Myakka (03100102), Sarasota Bay (03100201), Manatee (03100202), Little Manatee (03100203), Hillsborough (03100205), Withlacoochee (03100208), Waccasassa (03110101), Upper Suwannee (03110201), Alapaha (03110202), Withlacoochee (03110203), Lower Suwannee (03110205), Santa Fe (03110206), Lower Chattahoochee (03130004), Chipola (03130012), St. Andrew-St. Joseph Bays (03140101) & Pea (03140202) subbasins; Aerial Imagery Revision in Upper St. Johns (03080101), Western Okeechobee Inflow (03090103), Lake Okeechobee (03090201), Everglades (03090202), Florida Bay-Florida Keys (03090203), Big Cypress Swamp (03090204), Florida Southeast Coast (03090206), Alafia (03100204), Aucilla (03110103), Lower Suwannee (03110205), Blackwater (03140104), Pensacola Bay (03140105) & Perdido (03140106) subbasins. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace connected features through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to and be limited to the maximum scale set the NHD24K and NHDFlowline scale dependency settings. If this happens, to see the full set of selected features, change both the layer and group settings to “Show layer at all scales”, unclick the NHD 100K and Major NHD 100K group layers, and then zoom to the selected features again. Additionally, a new field in the 24K NHD Flowline featureclass has been added to support the analysis of Flowline features. The ‘Parent_Feature’ identifies the feature type of the flowline in all cases except for Artificial Paths. For Artificial paths, the feature type of the polygon feature it resides in has been used. 2015-04-10 Data updated in the GIS library. 2015-05-01 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section 2600 Blair Stone Rd MS 6520 Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us In December 2015, the Florida NHD 100K (as of March 25, 2015) and NHD 24K (as of October 22, 2015) including Watershed Boundary Dataset Hydrologic Units, GNIS alternate names and relationships were combined into one file geodatabase for public distribution and use. Notable changes to the 24K NHD database since the previous download in October 2014 are as follows: Edits performed by the Florida stewardship team in Alafia (03100204), Big Cypress Swamp (03090204), Blackwater (03140104), Crystal-Pithlachascotee (03100207), Econfina-Steinhatchee (03110102), Everglades (03090202), Florida Bay-Florida Keys (03090203), Lake Okeechobee (03090201), Lower Choctawhatchee (03140203), Lower Ochlockonee (03120003), Lower Suwannee (03110205), Pensacola Bay (03140105), St. Andrew-St. Joseph Bays (03140101), St. Marys (03070204), and Upper St. Johns (03080101) subbasins; Edits performed by USGS for attribute updates, connectivity checks and updating m-values in Alafia (03100204), Alapaha (03110202), Apalachee Bay-St. Marks (03120001), Apalachicola (03130011), Aucilla (03110103), Big Cypress Swamp (03090204), Blackwater (03140104), Caloosahatchee (03090205), Chipola (03130012), Choctawhatchee Bay (03140102), Daytona-St. Augustine (03080201), Escambia (03140305), Florida Southeast Coast (03090206), Kissimmee (03090101), Lake Okeechobee (03090201), Little Manatee (03100203), Lower Choctawhatchee (03140203), Lower Conecuh (03140304), Lower Ochlockonee (03120003), Lower St. Johns (03080103), Lower Suwannee (03110205), New (03130013), Oklawaha (03080102), Pensacola Bay (03140105), and Perdido (03140106) subbasins. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings. Additionally, a new field in the 24K NHD Flowline featureclass has been added to support the analysis of Flowline features. The “Parent_Feature” identifies the feature type of the flowline in all cases except for Artificial Paths. For Artificial paths, the feature type of the polygon feature it resides in has been used. See process step for additional information. It was realized that the US Board on Geographic Names doesn't recognize Atlantic Ocean along the western side of the state. The Florida stewardship team was in the process of removing these polygons but not all the edits made it into this original version of the NHD. After downloading the October 22, 2015 version of the NHD, the remaining Atlantic Ocean polygons in the Gulf were manually removed and currently match the federal database. The NHD editing process officially removed the polygons from the national database using the USGS tools in November. 2015-11-16 Edwin Abbey FDEP, DEAR Environmental Manager 850-245-8550 2600 Blair Stone Rd Tallahassee FL 32399-2400 US Edwin.Abbey@dep.state.fl.us Data updated in the GIS library. 2015-12-08 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section 2600 Blair Stone Rd MS 6520 Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us Added NOAA- NFHAP Estuarine Zones layer in the NHD layer published in DataMiner. 2016-02-25 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section 2600 Blair Stone Rd MS 6520 Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us In April 2016, the existing Florida NHD100K and NHD 24K as downloaded February 25, 2016 from the USGS NHD, Hydrologic Units, GNIS alternate names and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download were in the following subbasins: Apalachee Bay-St. Marks, Apalachicola Bay, Big Cypress Swamp, Charlotte Harbor, Choctawhatchee Bay, Escambia, Everglades, Kissimmee, Lower Choctawhatchee, Lower Suwannee, Myakka, St. Andrew-St. Joseph Bays, Upper St. Johns, and Western Okeechobee Inflow and assorted network improvements made by USGS staff. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings. 2016-04-26 Edwin Abbey FDEP, DEAR Environmental Manager 850-245-8550 2600 Blair Stone Rd Tallahassee FL 32399-2400 US Edwin.Abbey@dep.state.fl.us Data updated in SDE and DataMiner. Metadata updated. 2016-05-06 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section 2600 Blair Stone Rd MS 6520 Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us In October 2016, the existing Florida NHD100K and NHD 24K as downloaded September 5, 2016 from the USGS NHD, Hydrologic Units, GNIS alternate names and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download were in the following subbasins: Big Cypress Swamp, Caloosahatchee, Cape Canaveral, Daytona-St. Augustine, Econfina-Steinhatchee, Everglades, Kissimmee, Lake Okeechobee, Lower Ochlockonee, New, St. Andrew-St. Joseph Bays, Upper St. Johns, Oklawaha, Vero Beach and includes assorted network improvements made by USGS staff. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings. 2016-10-03 Edwin Abbey FDEP, DEAR Environmental Manager 850-245-8550 2600 Blair Stone Rd Tallahassee FL 32399-2400 US Edwin.Abbey@dep.state.fl.us Revised data obtained from DEAR as part of the biannual NHD update and updated the same in the GIS library. Metadata updated. 2016-12-09 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section 2600 Blair Stone Rd MS 6520 Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us In January 2017, the existing Florida NHD100K and NHD 24K as downloaded January 17, 2017 from the USGS NHD, Hydrologic Units, GNIS alternate names (from December 1, 2016) and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download were in the following subbasins: Florida Southeast Coast (03090206), Apalachicola (03130011), St. Andrew-St. Joseph Bays (03140101) and assorted network improvements made by USGS staff in St. Andrew-St. Joseph Bays (03140101). The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings.Relationship classes have been created to identify additional names that features may be known by through the Variant Names table. Relationship classes have also been created to facilitate the identification of which waterbody or area a flowline traverses through based on the WBAreaPermanent_ID field. 2017-01-24 Edwin Abbey FDEP, DEAR Environmental Manager 850-245-8550 2600 Blair Stone Rd Tallahassee FL 32399-2400 US Edwin.Abbey@dep.state.fl.us Revised data obtained from DEAR as part of the biannual NHD update and updated the same in the GIS library. Metadata updated. 2017-02-17 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section 2600 Blair Stone Rd MS 6520 Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us In June 2017, the existing Florida NHD100K and NHD 24K as downloaded May 1, 2017 from the USGS NHD, Hydrologic Units, GNIS alternate names (from June 1, 2017) and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download were in the following subbasins: Florida Southeast Coast (03090206), Withlacoochee (0300208), Little Manatee (03100203), Everglades (03090202), and Econfina-Steinhatchee (03110102). In preperation for the NHDPlusHR, 39 basins received minor edits to fix USGS Severity 1 and 3 errors. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings.Relationship classes have been created to identify additional names that features may be known by through the Variant Names table. Relationship classes have also been created to facilitate the identification of which waterbody or area a flowline traverses through based on the WBAreaPermanent_ID field. 2017-06-23 Revised data obtained from DEAR as part of the biannual NHD update and updated the same in the GIS library. Metadata updated. 2017-07-28T00:00:00 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section 2600 Blair Stone Rd MS 6520 Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us In December 2017, the existing Florida NHD100K and NHD 24K as downloaded November 27, 2017 from the USGS NHD, Hydrologic Units, GNIS alternate names (from October 1, 2017) and relationships were combined into one file geodatabase for public distribution and use.In preperation for the NHDPlusHR, 16 basins received minor edits to fix USGS Severity 1 and 3 errors. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings.Relationship classes have been created to identify additional names that features may be known by through the Variant Names table. Relationship classes have also been created to facilitate the identification of which waterbody or area a flowline traverses through based on the WBAreaPermanent_ID field. 2017-11-30T00:00:00 Revised data obtained from DEAR as part of the biannual NHD update and updated the same in the GIS library. Metadata updated. 2017-12-15T00:00:00 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section 2600 Blair Stone Rd MS 6520 Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us Florida Department of Environmental Protection (FDEP) OTIS/GIS Section In May 2018, the existing Florida NHD100K and NHD 24K as downloaded May 2, 2018 from the USGS NHD, Hydrologic Units, GNIS alternate names (from April 1, 2018) and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download were in the following subbasins: 03090204, 03080103, 03090202, and 03130011. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings.Relationship classes have been created to identify additional names that features may be known by through the Variant Names table. Relationship classes have also been created to facilitate the identification of which waterbody or area a flowline traverses through based on the WBAreaPermanent_ID field. 2018-05-11T00:00:00 Revised data obtained from DEAR as part of the biannual NHD update and updated the same in the GIS library. Metadata updated. 2018-05-31T00:00:00 In November 2018, the existing Florida NHD100K and NHD 24K as downloaded November 7, 2018 from the USGS NHD, Hydrologic Units, GNIS alternate names (from October 1, 2018) and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download were in the following subbasins: 03140103, 03130011, 03080103 03090206 and 03090202. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings. Relationship classes have been created to identify additional names that features may be known by through the Variant Names table. Relationship classes have also been created to facilitate the identification of which waterbody or area a flowline traverses through based on the WBAreaPermanent_ID field. 2018-11-16T00:00:00 Revised data obtained from DEAR as part of the biannual NHD update and updated the same in the GIS library. Metadata updated. 2018-11-28T00:00:00 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section 2600 Blair Stone Rd MS 6520 Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us Florida Department of Environmental Protection (FDEP) OTIS/GIS Section In May 2019, the existing Florida NHD100K and NHD 24K as downloaded April 26, 2019 from the USGS NHD, Hydrologic Units, GNIS alternate names (from April 1, 2019) and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download were in the following subbasins: 03140103, 03140106, 03110206, 03090205, 03080103, and 03100206. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings. Relationship classes have been created to identify additional names that features may be known by through the Variant Names table. Relationship classes have also been created to facilitate the identification of which waterbody or area a flowline traverses through based on the WBAreaPermanent_ID field. 2019-05-13T00:00:00 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section 2600 Blair Stone Rd MS 6520 Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us Florida Department of Environmental Protection (FDEP) OTIS/GIS Section Revised data obtained from DEAR as part of the biannual NHD update and updated the same in the GIS library. Metadata updated. 2019-05-20T00:00:00 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section 2600 Blair Stone Rd MS 6520 Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us Florida Department of Environmental Protection (FDEP) OTIS/GIS Section In November 2019, the existing Florida NHD100K and NHD 24K as downloaded October 28, 2019 from the USGS NHD, Hydrologic Units, GNIS alternate names (from September 1, 2019) and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download were in the following subbasins: 03100206, 03100201, 03080103, 03130011, and 03080201. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings.Relationship classes have been created to identify additional names that features may be known by through the Variant Names table. Relationship classes have also been created to facilitate the identification of which waterbody or area a flowline traverses through based on the WBAreaPermanent_ID field. 2019-11-01T00:00:00 Param Maharaj FDEP, DEAR, Watershed Services Program Environmental Specialist III 850-245-8551 2600 Blair Stone Rd Tallahassee FL 32399-2400 US Param.Maharaj@floridadep.gov Param Maharaj Param Maharaj Param Maharaj Revised data obtained from DEAR as part of the biannual NHD update and updated the same in the GIS library. Metadata updated. 2019-11-21T00:00:00 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section 2600 Blair Stone Rd MS 6520 Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us Florida Department of Environmental Protection (FDEP) OTIS/GIS Section In April 2020, the existing Florida NHD100K and NHD 24K as downloaded April 28, 2020 from the USGS NHD, Hydrologic Units, GNIS alternate names (from March 1, 2020) and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download were in the following subbasins: 03110203, 03110206, 03080102, and 03130012. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings.Relationship classes have been created to identify additional names that features may be known by through the Variant Names table. Relationship classes have also been created to facilitate the identification of which waterbody or area a flowline traverses through based on the WBAreaPermanent_ID field. 2020-05-04T00:00:00 Revised data obtained from DEAR as part of the biannual NHD update and updated the same in the GIS library. Metadata updated. 2020-05-29T00:00:00 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section 2600 Blair Stone Rd MS 6520 Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us Florida Department of Environmental Protection (FDEP) OTIS/GIS Section In November 2020, the existing Florida NHD100K and NHD 24K as downloaded November 2, 2020 from the USGS NHD, Hydrologic Units, GNIS alternate names (from September 1, 2020) and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download were in the following subbasins: 03110203, 03110205, and 03130011. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings.Relationship classes have been created to identify additional names that features may be known by through the Variant Names table. Relationship classes have also been created to facilitate the identification of which waterbody or area a flowline traverses through based on the WBAreaPermanent_ID field. 2020-11-12T00:00:00 Param Maharaj FDEP, DEAR, Watershed Services Program Florida NHD Steward 850-245-8551 2600 Blair Stone Rd Tallahassee FL 32399-2400 US Param.Maharaj@floridadep.gov Param Maharaj Param Maharaj Param Maharaj Revised data obtained from DEAR as part of the biannual NHD update and updated the same in the GIS library. Metadata updated. 2020-12-01T00:00:00 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section 2600 Blair Stone Rd MS 6520 Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us Florida Department of Environmental Protection (FDEP) OTIS/GIS Section In April 2021, the existing Florida NHD100K and NHD 24K as downloaded March 29, 2021 from the USGS NHD, Hydrologic Units, GNIS alternate names (from March 1, 2021) and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download were in the following subbasins: 03110203, 03110205, and 03130011. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings.Relationship classes have been created to identify additional names that features may be known by through the Variant Names table. Relationship classes have also been created to facilitate the identification of which waterbody or area a flowline traverses through based on the WBAreaPermanent_ID field. 2021-04-09T00:00:00 Param Maharaj FDEP, DEAR, Watershed Services Program Florida NHD Steward 850-245-8551 2600 Blair Stone Rd Tallahassee FL 32399-2400 US Param.Maharaj@floridadep.gov Param Maharaj Param Maharaj Param Maharaj Revised data obtained from DEAR as part of the biannual NHD update and updated the same in the GIS library. Metadata updated. 2021-05-20T00:00:00 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section 2600 Blair Stone Rd MS 6520 Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us Florida Department of Environmental Protection (FDEP) OTIS/GIS Section In October 2021, the existing Florida NHD100K and NHD 24K as downloaded October 12, 2021 from the USGS NHD, Hydrologic Units, GNIS alternate names (from August 25, 2021) and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download were in the following subbasins: 03110102, 03100208, 03100101, 03070204, and 03140102. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings.Relationship classes have been created to identify additional names that features may be known by through the Variant Names table. Relationship classes have also been created to facilitate the identification of which waterbody or area a flowline traverses through based on the WBAreaPermanent_ID field. 2021-10-27T00:00:00 Param Maharaj FDEP, DEAR, Watershed Services Program Florida NHD Steward 850-245-8551 2600 Blair Stone Rd Tallahassee FL 32399-2400 US Param.Maharaj@floridadep.gov Param Maharaj Param Maharaj Param Maharaj Revised data obtained from DEAR as part of the biannual NHD update and updated the same in the GIS library. Metadata updated. 2021-11-02T00:00:00 Florida Department of Environmental Protection (FDEP) OTIS 2600 Blair Stone Rd MS 6520 Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us Florida Department of Environmental Protection (FDEP) OTIS/GIS Section In March 2022, the existing Florida NHD100K and NHD 24K as downloaded March 27, 2022 from the USGS NHD, Hydrologic Units, GNIS alternate names (from August 25, 2021) and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download were in the following subbasins: 03100101, 03100103, 03070205, 03100204, 03140107, and 03070204. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings.Relationship classes have been created to identify additional names that features may be known by through the Variant Names table. Relationship classes have also been created to facilitate the identification of which waterbody or area a flowline traverses through based on the WBAreaPermanent_ID field. 2022-03-30T00:00:00 Param Maharaj FDEP, DEAR, Watershed Services Program Florida NHD Steward 850-245-8551 2600 Blair Stone Rd Tallahassee FL 32399-2400 US Param.Maharaj@floridadep.gov Param Maharaj Param Maharaj Param Maharaj Param Maharaj Revised data obtained from DEAR as part of the biannual NHD update and updated the same in the GIS library. Metadata updated. 2022-04-28T00:00:00 Florida Department of Environmental Protection (FDEP) OTIS 2600 Blair Stone Rd MS 6520 Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us Florida Department of Environmental Protection (FDEP) OTIS/GIS Section Florida Department of Environmental Protection (FDEP) OTIS In October 2022, the existing Florida NHD100K and NHD 24K as downloaded October 25, 2022 from the USGS NHD, Hydrologic Units, GNIS alternate names (from August 25, 2021) and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download were in the following subbasins: 03110205, 03100203, 03100208, and 03070204. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings.Relationship classes have been created to identify additional names that features may be known by through the Variant Names table. Relationship classes have also been created to facilitate the identification of which waterbody or area a flowline traverses through based on the WBAreaPermanent_ID field. 2022-11-03T00:00:00 Param Maharaj FDEP, DEAR, Watershed Services Program Florida NHD Steward 850-245-8551 2600 Blair Stone Rd Tallahassee FL 32399-2400 US Param.Maharaj@floridadep.gov Param Maharaj Param Maharaj Param Maharaj Param Maharaj Param Maharaj In March 2023, the existing Florida NHD100K and NHD 24K as downloaded March 27, 2023 from the USGS NHD, Hydrologic Units, GNIS alternate names (from August 25, 2021) and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download were in the following subbasins: 03100208, 03100203, 03140102, 03110103, 03110205, 03110102, 03140105, 03140104, 03140104, 03140305, 03130013, 03110101, and 03120003. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings.Relationship classes have been created to identify additional names that features may be known by through the Variant Names table. Relationship classes have also been created to facilitate the identification of which waterbody or area a flowline traverses through based on the WBAreaPermanent_ID field. 2023-03-30T00:00:00 Param Maharaj FDEP, DEAR, Watershed Services Program Florida NHD Steward 850-245-8551 2600 Blair Stone Rd Tallahassee FL 32399-2400 US Param.Maharaj@floridadep.gov Param Maharaj Param Maharaj Param Maharaj Param Maharaj Param Maharaj Param Maharaj Revised data obtained from DEAR as part of the biannual NHD update and updated the same in the GIS library. Metadata updated. 2023-04-12T00:00:00 Florida Department of Environmental Protection (FDEP) OTIS/GIS Section 2600 Blair Stone Rd MS 6520 Tallahassee FL 32399-2400 US GIS.Librarian@dep.state.fl.us Florida Department of Environmental Protection (FDEP) OTIS/GIS Section In November 2023, the existing Florida NHD100K and NHD 24K as downloaded October 30, 2023 from the USGS NHD, Hydrologic Units, GNIS alternate names (from August 25, 2021) and relationships were combined into one file geodatabase for public distribution and use. Notable edits in the 24K NHD database since the previous download were in the following subbasins: 03110102, 03140105, and 03120003. The database includes a network using the NHD24 NHDFlowline featureclass. The Utility Network Analyst tool can be used to trace routes through the network, however please note that if you set the results of the trace as selected features and zoom to selected, you may zoom to a scale that is outside the NHD24 dependency settings. Relationship classes have been created to identify additional names that features may be known by through the Variant Names table. Relationship classes have also been created to facilitate the identification of which waterbody or area a flowline traverses through based on the WBAreaPermanent_ID field. 2023-11-03T00:00:00 Param Maharaj FDEP, DEAR, Watershed Services Program Environmental Specialist III 850-245-8551 2600 Blair Stone Rd Tallahassee FL 32399-2400 US Param.Maharaj@floridadep.gov Param Maharaj Param Maharaj False Param Maharaj Feature Class https://publicfiles.dep.state.fl.us/OTIS/GIS/data/FLORIDA_NHD.zip File Geodatabase dataset EPSG 5.3(9.0.0) 998 /9j/4AAQSkZJRgABAQEAYABgAAD/2wBDAAMCAgMCAgMDAwMEAwMEBQgFBQQEBQoHBwYIDAoMDAsK CwsNDhIQDQ4RDgsLEBYQERMUFRUVDA8XGBYUGBIUFRT/2wBDAQMEBAUEBQkFBQkUDQsNFBQUFBQU FBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBT/wAARCADIASwDASIA AhEBAxEB/8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgcICQoL/8QAtRAAAgEDAwIEAwUFBAQA AAF9AQIDAAQRBRIhMUEGE1FhByJxFDKBkaEII0KxwRVS0fAkM2JyggkKFhcYGRolJicoKSo0NTY3 ODk6Q0RFRkdISUpTVFVWV1hZWmNkZWZnaGlqc3R1dnd4eXqDhIWGh4iJipKTlJWWl5iZmqKjpKWm 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