Description: 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.
Service Item Id: 3fc79d317bf84964b954e33e23233933
Copyright Text: The United States Geological Survey (USGS)
The National Hydrography Dataset (NHD)
1-888-275-8747
nhd@usgs.gov
Description: City of Savannah - Approved Letters of Map Amendment (FEMA FIRM amendments)Publication Date: 2010 -- presentLast Edit Date: September 2017Update Frequency: Editied as needed, irregular editingUse Limitations: Available for public use and download on the SAGIS Open Data website (www.sagis.org)Data Source: Federal Emergency Management Agency (FEMA) - from individual letters of map change or amendments (LOMAs/LOMCs)
Service Item Id: 3fc79d317bf84964b954e33e23233933
Copyright Text: Owner: City of Savannah, Development Services Department, CFM, Tom McDonald, Ph: 912-651-6510, E-mail: tmcdonald@savannahga.gov
Editor: City of Savannah, Development Services, GIS Analyst, Ph: 912-651-6510.
For questions, contact Tom McDonald, CFM, Development Services, 912-651-6510., individual LOMA documents are available upon request, or by visiting the City of Savannah Flood Protection Information webpage at http://savannahga.gov/index.aspx?nid=936
Description: This dataset includes locations, names and grant information for the FEMA purchased lots in Savannah.Edited as neededAvailable for download on the SAGIS Open Data website (www.sagis.org).
Service Item Id: 3fc79d317bf84964b954e33e23233933
Copyright Text: Owner: City of Savannah, Office of Real Estate Services, Property Coordinator, Lynette Allen, 912-651-6510 ext. 1871, lallen02@savannahga.gov
Custodian: City of Savannah, Development Services, GIS Coordinator, Tom Jeanquart, 912-651-6510 #1851, tjeanquart@savannahga.gov
Description: Parcels area as defined by a Letter of Map Change. FEMA also maintains a LOMC database, however it is only a point file. This is the Tax Parcel and taz parcel attributes of LOMC Parcels.Updated as needed.Available for download on the SAGIS Open Data website.
Service Item Id: 3fc79d317bf84964b954e33e23233933
Copyright Text: Chatham County Department of Engineering
912-652-7800
Contact: Tina Whittier, David Anderson
Description: Unit Area as defined by a Letter of Map Change. FEMA also maintains a LOMC database, however it is only a point file.Updated as needed.Available for download on the SAGIS Open Data website.
Service Item Id: 3fc79d317bf84964b954e33e23233933
Copyright Text: Chatham County Department of Engineering
912-652-7800
Contact: Tina Whittier, David Anderson
Description: Unit Area as defined by a Letter of Map Ammendment. FEMA also maintains a LOMA database, however it is only a point file.Updated As Needed.Available for download on the SAGIS Open Data website.
Service Item Id: 3fc79d317bf84964b954e33e23233933
Copyright Text: Chatham County Department of Engineering
912-652-7800
Contact: Tina Whittier
Description: 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.
Service Item Id: 3fc79d317bf84964b954e33e23233933
Copyright Text: The United States Geological Survey (USGS)
The National Hydrography Dataset (NHD)
1-888-275-8747
nhd@usgs.gov
Description: 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.
Service Item Id: 3fc79d317bf84964b954e33e23233933
Copyright Text: The United States Geological Survey (USGS)
The National Hydrography Dataset (NHD)
1-888-275-8747
nhd@usgs.gov
Description: 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.
Service Item Id: 3fc79d317bf84964b954e33e23233933
Copyright Text: The United States Geological Survey (USGS)
The National Hydrography Dataset (NHD)
1-888-275-8747
nhd@usgs.gov
Description: The Watershed Boundary Dataset (WBD) is a comprehensive aggregated collection of hydrologic unit data consistent with the national criteria for delineation and resolution. It defines the areal extent of surface water drainage to a point except in coastal or lake front areas where there could be multiple outlets as stated by the "Federal Standards and Procedures for the National Watershed Boundary Dataset (WBD)" “Standard” (http://pubs.usgs.gov/tm/11/a3/). Watershed boundaries are determined solely upon science-based hydrologic principles, not favoring any administrative boundaries or special projects, nor particular program or agency. This dataset represents the hydrologic unit boundaries to the 12-digit (6th level) for the entire United States. Some areas may also include additional subdivisions representing the 14- and 16-digit hydrologic unit (HU). At a minimum, the HUs are delineated at 1:24,000-scale in the conterminous United States, 1:25,000-scale in Hawaii, Pacific basin and the Caribbean, and 1:63,360-scale in Alaska, meeting the National Map Accuracy Standards (NMAS). Higher resolution boundaries are being developed where partners and data exist and will be incorporated back into the WBD. WBD data are delivered as a dataset of polygons and corresponding lines that define the boundary of the polygon. WBD polygon attributes include hydrologic unit codes (HUC), size (in the form of acres and square kilometers), name, downstream hydrologic unit code, type of watershed, non-contributing areas, and flow modifications. The HUC describes where the unit is in the country and the level of the unit. WBD line attributes contain the highest level of hydrologic unit for each boundary, line source information and flow modifications.
Service Item Id: 3fc79d317bf84964b954e33e23233933
Copyright Text: The United States Geological Survey (USGS)
The National Hydrography Dataset (NHD)
The Watershed Boundary Dataset (WBD)
1-888-275-8747
nhd@usgs.gov
Funding for the Watershed Boundary Dataset (WBD) was provided by the USDA-NRCS, USGS and EPA along with other federal, state and local agenciesies. Representatives from many agencies contributed a substantial amount of time and salary towards quality review and updating of the dataset in order to meet the WBD Standards. Acknowledgment of the originating agencies would be appreciated in products derived from these data. See dataset specific metadata for further information
Description: The Watershed Boundary Dataset (WBD) is a comprehensive aggregated collection of hydrologic unit data consistent with the national criteria for delineation and resolution. It defines the areal extent of surface water drainage to a point except in coastal or lake front areas where there could be multiple outlets as stated by the "Federal Standards and Procedures for the National Watershed Boundary Dataset (WBD)" “Standard” (http://pubs.usgs.gov/tm/11/a3/). Watershed boundaries are determined solely upon science-based hydrologic principles, not favoring any administrative boundaries or special projects, nor particular program or agency. This dataset represents the hydrologic unit boundaries to the 12-digit (6th level) for the entire United States. Some areas may also include additional subdivisions representing the 14- and 16-digit hydrologic unit (HU). At a minimum, the HUs are delineated at 1:24,000-scale in the conterminous United States, 1:25,000-scale in Hawaii, Pacific basin and the Caribbean, and 1:63,360-scale in Alaska, meeting the National Map Accuracy Standards (NMAS). Higher resolution boundaries are being developed where partners and data exist and will be incorporated back into the WBD. WBD data are delivered as a dataset of polygons and corresponding lines that define the boundary of the polygon. WBD polygon attributes include hydrologic unit codes (HUC), size (in the form of acres and square kilometers), name, downstream hydrologic unit code, type of watershed, non-contributing areas, and flow modifications. The HUC describes where the unit is in the country and the level of the unit. WBD line attributes contain the highest level of hydrologic unit for each boundary, line source information and flow modifications.
Service Item Id: 3fc79d317bf84964b954e33e23233933
Copyright Text: The United States Geological Survey (USGS)
The National Hydrography Dataset (NHD)
The Watershed Boundary Dataset (WBD)
1-888-275-8747
nhd@usgs.gov
Funding for the Watershed Boundary Dataset (WBD) was provided by the USDA-NRCS, USGS and EPA along with other federal, state and local agenciesies. Representatives from many agencies contributed a substantial amount of time and salary towards quality review and updating of the dataset in order to meet the WBD Standards. Acknowledgment of the originating agencies would be appreciated in products derived from these data. See dataset specific metadata for further information
Description: This data set is a complete digital hydrologic unit boundary layer of the Subbasin (8-digit) 4th level for the entire United States. This data set consists of geo-referenced digital data and associated attributes created in accordance with the "Federal Guidelines, Requirements, and Procedures for the National Watershed Boundary Dataset; Chapter 3 of Section A, Federal Standards, Book 11, Collection and Delineation of Spatial Data; Techniques and Methods 11-A3" (04/01/2009). http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/water/watersheds/?cid=nrcs143_021630 . Polygons are attributed with hydrologic unit codes, name, and size. The data is currently updated through the USGS National Hydrography Dataset (NHD) Program and replicated to NRCS twice per year. The U.S. Fish and Wildlife Service (USFWS)modified this version of the dataset by deleting some fields, reprojected the data to an Albers equal area projection and recalculated the 'AreaAcres' field. Those Subbasins that did not extend to NOAA's 3 Nautical Mile Line were extended by the USFWS to meet this boundary to provide consistency across Subbasins, and Subbasins were created for the Rota, Tinian, and the Palmyra Atoll.
Service Item Id: 3fc79d317bf84964b954e33e23233933
Copyright Text: The United States Geological Survey (USGS)
The National Hydrography Dataset (NHD)
The Watershed Boundary Dataset (WBD)
1-888-275-8747
nhd@usgs.gov
Funding and support for the Watershed Boundary Dataset (WBD) were provided by the Natural Resources Conservation Service, the Environmental Protection Agency, and the United States Geological Survey. Representatives from the U.S. Geological Survey and Environmental Protection Agency contributed a substantial amount of time and salary towards quality review and updating of the dataset in order to meet the Federal Standards for Delineation of Hydrologic Unit Boundaries.
Description: TIDE GATE - An opening through which water may flow freely when the tide sets in one direction, but which closes automatically and prevents the water from flowing in the other direction. This inventory of free-flowing Tide Gates are separate from the individual Flood Gates that are mechanically controlled at each of the 7 Main Stormwater Pump Stations located throughout the City of Savannah.THIS LAYER IS EDITED REGULARLY, WITH MONTHLY REPLICATION.FOR GENERAL PUBLIC USE AND AVAILABLE FOR DOWNLOAD ON THE SAGIS OPEN DATA WEBSITE (www.sagis.org).
Service Item Id: 3fc79d317bf84964b954e33e23233933
Copyright Text: OWNER: CITY OF SAVANNAH - STORMWATER DEPT.
STORMWATER DEPT. DIRECTOR - ROGER RAINES (PH. 650-7855)
rraines@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: BARRIE WILKINS (PH. 650-7855)
bwilkins@savannahga.gov
Description: THERE ARE A TOTAL OF 7 STORMWATER PUMPING STATIONS LOCATED IN DIFFERENT PARTS OF SAVANNAH. THESE PUMP STATIONS ARE USED TO CONTROL THE FREQUENT HEAVY RAIN EVENTS AND LOCAL FLOODING DUE TO TROPICAL HURRICANES IN THE SAVANNAH AREA. THE 7 STORMWATER PUMP STATIONS INCLUDE THE FOLLOWING:1. LATHROP PUMP STATION 2. FELL ST. PUMP STATION 3. SPRINGFIELD PUMP STATION 4. KAYTON PUMP STATION 5. GWINNETT ST. PUMP STATION 6. DERENNE PUMP STATION 7. MONTGOMERY PUMP STATION. THE LAYER IS EDITED AS NEEDED.FOR GENERAL PUBLIC USE AND AVAILABLE FOR DOWNLOAD ON THE SAGIS OPEN DATA WEBSITE (www.sagis.org).
Service Item Id: 3fc79d317bf84964b954e33e23233933
Copyright Text: OWNER: CITY OF SAVANNAH - STORMWATER DEPT.
STORMWATER DEPT. DIRECTOR - ROGER RAINES (PH. 650-7855)
rraines@savannahga.gov
KEN KELLY - STORMWATER ADMINISTRATOR (PH. 651-4262)
kkelly@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: BARRIE WILKINS (PH. 650-7855)
bwilkins@savannahga.gov
Description: A STORMWATER MANHOLE IS COMMANLY USED FOR MAINTENANCE ACCESS TO UNDERGROUND PIPES. THE MANHOLE ALSO SERVES AS A JUNCTION POINT WHEN STORM PIPES NEED TO CHANGE IN HORIZONTAL OR VERTICAL DIRECTION WITHIN A DRAINAGE PIPE NETWORK. THIS LAYER IS EDITED REGULARLY, WITH WEEKLY REPLICATION.FOR GENERAL PUBLIC USE AND AVAILABLE FOR DOWNLOAD ON THE SAGIS OPEN DATA WEBSITE (www.sagis.org).
Service Item Id: 3fc79d317bf84964b954e33e23233933
Copyright Text: OWNER: CITY OF SAVANNAH - STORMWATER DEPT.
STORMWATER DEPT. DIRECTOR - ROGER RAINES (PH. 650-7855)
rraines@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: BARRIE WILKINS (PH. 650-7855)
bwilkins@savannahga.gov
Description: A DITCH IS A NARROW CHANNEL EITHER MAN-MADE OR WAS GENERATED FROM NATURAL FLOW THAT CONVEYS RAINWATER DOWNSTREAM TO A LARGER STREAM OR CANAL.A CANAL IS A LARGE WATER CHANNEL THAT COLLECTS STORMWATER RUNOFF FROM SMALLER DITCHES AND STORM PIPES AND FLOWS DOWNSTREAM TO A PUMP STATION OR RIVER.THIS LAYER IS EDITED REGULARLY, WITH WEEKLY REPLICATION.FOR GENERAL PUBLIC USE AND AVAILABLE FOR DOWNLOAD ON THE SAGIS OPEN DATA WEBSITE (www.sagis.org).
Service Item Id: 3fc79d317bf84964b954e33e23233933
Copyright Text: OWNER: CITY OF SAVANNAH - STORMWATER DEPT.
STORMWATER DEPT. DIRECTOR - ROGER RAINES (PH. 650-7855)
rraines@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: BARRIE WILKINS (PH. 650-7855)
bwilkins@savannahga.gov
Description: Within the Stormwater Inlet layer, each inlet is classified under the Subtype field according the the structure type. The five structure types are classified as: 1. Curb Inlet 2. Grate Inlet 3. Curb & Grate Combination Inlet 4. Roof Inlet 5. Dome Inlet THIS LAYER IS EDITED REGULARLY, WITH WEEKLY REPLICATION.FOR GENERAL PUBLIC USE AND AVAILABLE FOR DOWNLOAD ON THE SAGIS OPEN DATA WEBSITE (www.sagis.org).
Service Item Id: 3fc79d317bf84964b954e33e23233933
Copyright Text: OWNER: CITY OF SAVANNAH - STORMWATER DEPT.
STORMWATER DEPT. DIRECTOR - ROGER RAINES (PH. 650-7855)
rraines@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: BARRIE WILKINS (PH. 650-7855)
bwilkins@savannahga.gov
Description: THE PURPOSE OF THE HEADWALL IS TO PROTECT THE UNDERGROUND STORMWATER PIPE OR CULVERT FROM SOIL EROSION CAUSED BY THE SURGE OF HEAVY WATER FLOW WITHIN THE DITCH OR BY SURFACE RUNOFF AROUND THE EXISTING STORM PIPE.THIS LAYER IS EDITED REGULARLY, WITH WEEKLY REPLICATION.FOR GENERAL PUBLIC USE AND AVAILABLE FOR DOWNLOAD ON THE SAGIS OPEN DATA WEBSITE (www.sagis.org).
Service Item Id: 3fc79d317bf84964b954e33e23233933
Copyright Text: OWNER: CITY OF SAVANNAH - STORMWATER DEPT.
STORMWATER DEPT. DIRECTOR - ROGER RAINES (PH. 650-7855)
rraines@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: BARRIE WILKINS (PH. 650-7855)
bwilkins@savannahga.gov
Description: This database is a conflation of the older database and the more current data collected by the Department of Engineering. Many fields have been combined and some removed to make the database more readable and easier to edit. The purpose of including non-County maintained structures serves to understand the complete drainage system connectivity, and also, to easily add or remove existing features into the MS4 should a mistake be discovered or annexation/de-annexations occur.
Description: This database is a conflation of the older database and the more current data collected by the Department of Engineering. Many fields have been combined and some removed to make the database more readable and easier to edit. The purpose of including non-County maintained pipes serves to understand the complete drainage system connectivity, and also, to easily add or remove existing features into the MS4 should a mistake be discovered or annexation/de-annexations occur.
Description: This database is a conflation of the older database, data collected by the Department of Engineering, and LiDAR derived drainage features. Many fields have been combined and some removed to make the database more readable and easier to edit. The purpose of including non-County maintained structures serves to understand the complete drainage system connectivity, and also, to easily add or remove existing features into the MS4 should a mistake be discovered or annexation/de-annexations occur.
Description: These stormwater conduit pipes are used to convey surface rainwater and groundwater to the nearest ditch, canal or river. The conduits and inlets represent the storm drain infrastructure for the City of Savannah. This layer was created in ESRI ArcGIS software to display the location of underground stormwater drainage pipes. The layer displays the conduit pipes as a line feature and contains pipe attribute data such as diameter, material, length and invert elevations. The pipe invert elevations are entered into GIS taken from design Asbuilt information. THIS LAYER IS EDITED REGULARLY, WITH WEEKLY REPLICATION.FOR GENERAL PUBLIC USE AND AVAILABLE FOR DOWNLOAD ON THE SAGIS OPEN DATA WEBSITE (www.sagis.org).
Service Item Id: 3fc79d317bf84964b954e33e23233933
Copyright Text: OWNER: CITY OF SAVANNAH - STORMWATER DEPT.
STORMWATER DEPT. DIRECTOR - ROGER RAINES (PH. 650-7855)
rraines@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: BARRIE WILKINS (PH. 650-7855)
bwilkins@savannahga.gov
Description: There has been an on-going effort within the Stormwater GIS department to update and improve the delineations of the initial boundaries of these Drainage Basins based upon more accurate information derived from field surveys of underground pipe networks and improved drainage features. In addition, some of the new Drainage Basins particularly on the West side of Savannah including the newly annexed areas of the City have now been incorporated into the overall Drainage Basin Layer. The City of Savannah Stormwater Department has made great effort in determining the proper flow direction of all existing and improved surface ditches and underground storm pipes in order to properly delineate the correct boundary line of each Drainage Basin for CIP Drainage Studies. THIS LAYER IS EDITED REGULARLY, WITH MONTHLY REPLICATION.FOR GENERAL PUBLIC USE AND AVAILABLE FOR DOWNLOAD ON THE SAGIS OPEN DATA WEBSITE (www.sagis.org).
Service Item Id: 3fc79d317bf84964b954e33e23233933
Copyright Text: OWNER: CITY OF SAVANNAH - STORMWATER DEPT.
STORMWATER DEPT. DIRECTOR - ROGER RAINES (PH. 650-7855)
rraines@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: BARRIE WILKINS (PH. 650-7855)
bwilkins@savannahga.gov
Description: FEMA Flood Map geodatabase downloaded on August 17, 2018.S_FLD_HAZ_AR copied with additional fields added for calculating the X 500 zone and labels with BFE attached.