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: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: OWNER: CITY OF SAVANNAH - STORMWATER DEPARTMENT.
STORMWATER DEPARTMENT DIRECTOR - ZACK HOFFMAN PH. (912) 650-7855 ext. 1938 zhoffman@savannahga.gov
ARCGIS DATA CUSTODIAN: BARRIE WILKINS PH. (912) 650-7855 ext. 2859 bwilkins@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: BARRIE WILKINS PH. (912) 650-7855 ext. 2859 bwilkins@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: MO SPIESSL PH. (912) 650-7855 ext. 2546 mspiessl@savannahga.gov
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. This layer displays the conduit pipes as a line feature and contains pipe attribute data such as pipe diameter, material, length and invert elevations. The pipe invert elevations are entered into GIS taken from design Asbuilt information.
Service Item Id: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: OWNER: CITY OF SAVANNAH - STORMWATER DEPARTMENT.
STORMWATER DEPARTMENT DIRECTOR - ZACK HOFFMAN PH. (912) 650-7855 ext. 1938 zhoffman@savannahga.gov
ARCGIS DATA CUSTODIAN: BARRIE WILKINS PH. (912) 650-7855 ext. 2859 bwilkins@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: BARRIE WILKINS PH. (912) 650-7855 ext. 2859 bwilkins@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: MO SPIESSL PH. (912) 650-7855 ext. 2546 maureen.spiessl@savannahga.gov
Color: [137, 112, 68, 255] Background Color: N/A Outline Color: N/A Vertical Alignment: bottom Horizontal Alignment: left Right to Left: false Angle: 0 XOffset: 0 YOffset: 0 Size: 6 Font Family: Arial Font Style: normal Font Weight: normal Font Decoration: none
Description: WHENEVER THERE IS A SEVERE RAIN EVENT WITHIN THE CITY OF SAVANNAH THAT CAUSES LOCAL STREET FLOODING: THE CITY STORMWATER DEPARTMENT RECORDS THE LOCATION OF THESE FLOODED INTERSECTIONS AND ADDS THE STREET INTERSECTIONS INTO THIS LAYER FOLLOWED BY THE DATE OF THE SEVERE FLOODING. THIS LAYER IS USED IN STORMATER ANALYSIS AND BUILDING PERMIT APPLICATIONS FOR DRAINAGE IMPROVEMENT DESIGN WITHIN CERTAIN AREAS. THIS LAYER IS EDITED REGULARLY, WITH MONTHLY REPLICATION.FOR INTERNAL SAGIS PARTNERS ONLY, DO NOT DISTRIBUTE TO OTHER AGENCIES.
Service Item Id: 9a1821fde7f94f04abf5f733bfdf9957
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 FLOODED STRUCTURE DATA LAYER CONSISTS OF ALL OF THE PREVIOUSLY DOCUMENTED FLOODED STRUCTURES WITHIN THE CITY OF SAVANNAH. EACH FLOODED STRUCTURE CONTAINS THE DATE OF FLOOD AND RELATIVE COMMENTS CONCERNING HEIGHT OF WATER ABOVE FINISHED FLOOR.THIS LAYER IS EDITED REGULARLY, WITH MONTHLY REPLICATION.FOR INTERNAL SAGIS PARTNERS ONLY, DO NOT DISTRIBUTE TO OTHER AGENCIES.
Service Item Id: 9a1821fde7f94f04abf5f733bfdf9957
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: 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.
Service Item Id: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: OWNER: CITY OF SAVANNAH - STORMWATER DEPARTMENT.
STORMWATER DEPARTMENT DIRECTOR - ZACK HOFFMAN (PH. 650-7855) zhoffman@savannahga.gov
ARCGIS DATA CUSTODIAN: BARRIE WILKINS (PH. 650-7855) bwilkins@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 THE CITY OF SAVANNAH PUBLIC USE AND AVAILABLE FOR DOWNLOAD ON THE SAGIS OPEN DATA WEBSITE (www.sagis.org).
Service Item Id: 9a1821fde7f94f04abf5f733bfdf9957
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: THESE STORMWATER STUB-OUT LOCATIONS ALSO REPRESENT WHERE AN ABANDONED STORM PIPE HAS BEEN PLUGGED AT END OF PIPE BUT LEFT IN PLACE AS ABANDONED.THIS LAYER IS EDITED REGULARLY, WITH WEEKLY REPLICATION.FOR INTERNAL SAGIS PARTNERS ONLY, DO NOT DISTRIBUTE TO OTHER AGENCIES.
Service Item Id: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: OWNER: CITY OF SAVANNAH - STORMWATER DEPARTMENT.
STORMWATER DEPARTMENT DIRECTOR - ZACK HOFFMAN PH. (912) 650-7855 ext. 1938 zhoffman@savannahga.gov
ARCGIS DATA CUSTODIAN: BARRIE WILKINS PH. (912) 650-7855 ext. 2859 bwilkins@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: BARRIE WILKINS PH. (912) 650-7855 ext. 2859 bwilkins@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: MO SPIESSL PH. (912) 650-7855 ext. 2546 maureen.spiessl@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: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: OWNER: CITY OF SAVANNAH - STORMWATER DEPARTMENT.
STORMWATER DEPARTMENT DIRECTOR - ZACK HOFFMAN PH. (912) 650-7855 ext. 1938 zhoffman@savannahga.gov
ARCGIS DATA CUSTODIAN: BARRIE WILKINS PH. (912) 650-7855 ext. 2859 bwilkins@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: BARRIE WILKINS PH. (912) 650-7855 ext. 2859 bwilkins@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: MO SPIESSL PH. (912) 650-7855 ext. 2546 mspiessl@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 Basin 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: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: OWNER: CITY OF SAVANNAH - STORMWATER DEPARTMENT.
STORMWATER DEPARTMENT DIRECTOR - ZACK HOFFMAN PH. (912) 650-7855 ext. 1938 zhoffman@savannahga.gov
ARCGIS DATA CUSTODIAN: BARRIE WILKINS PH. (912) 650-7855 ext. 2859 bwilkins@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: BARRIE WILKINS PH. (912) 650-7855 ext. 2859 bwilkins@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: MO SPIESSL PH. (912) 650-7855 ext. 2546 maureen.spiessl@savannahga.gov
Color: [0, 0, 0, 255] Background Color: N/A Outline Color: N/A Vertical Alignment: bottom Horizontal Alignment: left Right to Left: false Angle: 0 XOffset: 0 YOffset: 0 Size: 10 Font Family: Tw Cen MT Font Style: normal Font Weight: normal Font Decoration: none
Description: This data is used to represent the location of current, historical, and estimated septic systems in the Vernon River watershed. Due to the low elevation of the Vernon River watershed it is possible for individual septic systems to malfunction and contribute to increased bacterial flow into the impaired waterway. This data will be used to monitor and explore possible sources of bacterial influence into the Vernon River watershed. The estimated septic systems are determined if the property owners do not pay for sewer service. The data include addresses of confirmed septic systems and estimated septic systems based on whether the owner of the property is unbilled for water/sewer services. The data also includes the municipality in which the property is located. Note this data is not perfect and may be incomplete/missing septic systems. There are septic systems that are not within reach of connecting to the City of Savannah water system. There are septic systems that are within reach and should be connected to the City of Savannah water and sewer. There are unknown sites where it is unclear whether the property has a septic system. There are some properties that have a septic system however, receive water from the City of Savannah but are not billed. Vernon River Watershed Management Plan, Savannah, Georgia 2022 https://www.ogeecheeriverkeeper.org/wp-content/uploads/2023/07/Revised-WMP-Vernon-River-2023.pdf THIS LAYER IS EDITED REGULARLY. IT IS AVAILABLE TO THE PUBLIC UPON REQUEST OF THE DATA OWNER/EDITOR. NOT INTENDED FOR REPLICATION ON THE SAGIS DATA WEBSITE. Disclaimer: The city of Savannah neither certifies nor claims that the information shown on the dataset represents the existing site conditions. The information on the dataset shall not be used without field verification.
Service Item Id: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: Owner: City of Savannah, Water Resources Planning and Engineering Point of contact: Civil Engineer, Water Resources Planning and Engineering, Shawn Rosenquist, 912-525-3100 EXT 2511, Shawn.Rosenquist@Savannahga.gov Data Custodian: Stormwater Management Division, GIS Analyst, Maureen Spiessl, 912-525-3100 EXT 2546, maureen.spiessl@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.
RehabType
(
type: esriFieldTypeString, alias: RehabType, length: 50
, Coded Values:
[CP: Cured-In-Place Pipe]
, [FF: Fold and Form or Deform/Reform]
, [SN: Segmented Panel (Panels joined together to form a complete section)]
, ...3 more...
)
Color: [255, 0, 0, 255] Background Color: N/A Outline Color: N/A Vertical Alignment: bottom Horizontal Alignment: center Right to Left: false Angle: 0 XOffset: 0 YOffset: 0 Size: 20 Font Family: Arial Font Style: normal Font Weight: normal Font Decoration: none
Description: This model layer represents the combined local Engineering Firms drainage studies for each drainage basin displaying the 100 Year Flood Limits by polygon boundaries. This model layer defines the areas that will be subject to development restrictions referenced in the 2018 Field Drainage Prevention Ordinance.This layer is to provide assistance in identifying specific local areas of problematic drainage resulting from a 100 Year 24 hour storm event.This model layer represents the local hydraulic study (ZONE 'M') of each drainage basin within the City of Savannah. The results of the detail drainage studies take into acount not only the surface runoff calculations, but also the pipe sizes and flow direction of existing underground stormwater conduits including recent CIP Drainage Basin improvement projects that may not have been incorporated into the National DFIRM Flood maps.CITY ZONE 'M' - means an area defined through hydraulic modeling or other standard engineering analysis as described in Article B, Section 8-70 of the Stormwater Field Drainage Prevention Ordinance.A calibrated hydrologic / hydraulic study of each of the drainage basin was performed using the Stormwater program XPSWMM and historic local flooding data to produce each of the 100 Year Flood Plain Limit boundaries.THIS LAYER IS EDITED AS NEEDED WHEN NEW BASIN MODELS BECOME AVAILABLE.AVAILABLE FOR DOWNLOAD ON THE SAGIS OPEN DATA WEBSITE (www.sagis.org).
Service Item Id: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: CASEY SOUTH BASIN STUDY - PUBLISHED FLOOD MODEL JULY, 2011 - EMC ENGINEERING SERVICES
CASEY NORTH BASIN STUDY - PUBLISHED FLOOD MODEL SEPTEMBER, 2013 - HUSSEY, GAY, BELL & DeYOUNG ENGINEERING SERVICES
BILBO BASIN STUDY - PUBLISHED REVISED FLOOD MODEL APRIL 2021 - HUSSEY, GAY, BELL ENGINEERING SERVICES
PLACENTIA BASIN STUDY - PUBLISHED FLOOD MODEL MAY, 2018 - EMC ENGINEERING SERVICES SPRINGFIELD CANAL BASIN STUDY - PUBLISHED FLOOD MODEL DECEMBER, 2017 - THOMAS & HUTTON ENGINEERING SERVICES
LITTLE OGEECHEE CANAL BASIN STUDY - PUBLISHED FLOOD MODEL FEBRUARY 2025 - THOMAS & HUTTON ENGINEERING SERVICES
OWNER: CITY OF SAVANNAH - STORMWATER DEPARTMENT.
ZACK HOFFMAN - STORMWATER DEPARMENT. DIRECTOR - (PH. 650-7855) zhoffman@savannahga.gov
TOM McDONALD, CFM - PERMITTING / FLOODPLAIN ADMINISTRATOR - (PH. 912-651-6530 ext 1895) tmcdonald@SavannahGa.Gov
BARRIE WILKINS - ARCGIS EDITOR FOR THIS LAYER (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.
Description: This dataset was created to monitor the water quality of the Vernon River and its tributaries watershed for bacterial influence during dry weather sampling. The polygons in this layer represent subwatersheds in a hydraulic model, that was used, in conjunction with a large volume of FIB samples to estimate the average loading from each subwatershed during dry weather. The units of FIB for each polygon subwatershed are given in 109 MPN/acre-day. Dry weather was defined as antecedent rainfall within 72 hours of sampling. The hydraulic modeling was done using EPA SWMM5 with PCSWMM software from Computational Hydraulics International.Note: Field descript and CFU billions per acre per day were calculated by ((concentration times flow rate)/ contributing area) For methods and analysis refer to the Vernon River Watershed Management Plan, Savannah, Georgia 2022 https://www.ogeecheeriverkeeper.org/wp-content/uploads/2023/07/Revised-WMP-Vernon-River-2023.pdf THIS LAYER IS EDITED REGULARLY. IT IS AVAILABLE TO THE PUBLIC UPON REQUEST OF THE DATA OWNER/EDITOR. NOT INTENDED FOR REPLICATION ON THE SAGIS DATA WEBSITE. Disclaimer: The city of Savannah neither certifies nor claims that the information shown on the dataset represents the existing site conditions. The information on the dataset shall not be used without field verification.
Service Item Id: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: Owner: City of Savannah, Water Resources Planning and Engineering Point of contact: Civil Engineer, Water Resources Planning and Engineering, Shawn Rosenquist, 912-525-3100 EXT 2511, Shawn.Rosenquist@Savannahga.gov Data Custodian: Stormwater Management Division, GIS Analyst, Maureen Spiessl, 912-525-3100 EXT 2546, maureen.spiessl@savannahga.gov
Description: This dataset was created to monitor the water quality of the Vernon River and its tributaries watershed for bacterial influence during wet weather sampling. The polygons in this layer represent subwatersheds in a hydraulic model, that was used, in conjunction with a large volume of FIB samples to estimate the average loading from each subwatershed during wet weather. The units of FIB for each polygon subwatershed are given in 109 MPN/acre-day. Wet weather was defined as antecedent rainfall within 72 hours of sampling. The hydraulic modeling was done using EPA SWMM5 with PCSWMM software from Computational Hydraulics International. Note: Field descript and CFU billions per acre per day were calculated by ((concentration times flow rate)/ contributing area) For methods and analysis refer to the Vernon River Watershed Management Plan, Savannah, Georgia 2022 https://www.ogeecheeriverkeeper.org/wp-content/uploads/2023/07/Revised-WMP-Vernon-River-2023.pdf THIS LAYER IS EDITED REGULARLY. IT IS AVAILABLE TO THE PUBLIC UPON REQUEST OF THE DATA OWNER/EDITOR. NOT INTENDED FOR REPLICATION ON THE SAGIS DATA WEBSITE. Disclaimer: The city of Savannah neither certifies nor claims that the information shown on the dataset represents the existing site conditions. The information on the dataset shall not be used without field verification.
Service Item Id: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: Owner: City of Savannah, Water Resources Planning and Engineering Point of contact: Civil Engineer, Water Resources Planning and Engineering, Shawn Rosenquist, 912-525-3100 EXT 2511, Shawn.Rosenquist@Savannahga.gov Data Custodian: Stormwater Management Division, GIS Analyst, Maureen Spiessl, 912-525-3100 EXT 2546, maureen.spiessl@savannahga.gov
Description: This dataset was created to monitor the water quality of the Vernon River and its tributaries watershed for bacterial influence during dry weather sampling. The polygons in this layer represent subwatersheds in a hydraulic model, that was used, in conjunction with a large volume of FIB samples to estimate the average loading from each subwatershed during dry weather. The units of FIB for each polygon subwatershed are given in 109 MPN/acre-day. Dry weather was defined as antecedent rainfall within 72 hours of sampling. The hydraulic modeling was done using EPA SWMM5 with PCSWMM software from Computational Hydraulics International.Note: Field descript and CFU billions per acre per day were calculated by ((concentration times flow rate)/ contributing area) For methods and analysis refer to the Vernon River Watershed Management Plan, Savannah, Georgia 2022 https://www.ogeecheeriverkeeper.org/wp-content/uploads/2023/07/Revised-WMP-Vernon-River-2023.pdf THIS LAYER IS EDITED REGULARLY. IT IS AVAILABLE TO THE PUBLIC UPON REQUEST OF THE DATA OWNER/EDITOR. NOT INTENDED FOR REPLICATION ON THE SAGIS DATA WEBSITE. Disclaimer: The city of Savannah neither certifies nor claims that the information shown on the dataset represents the existing site conditions. The information on the dataset shall not be used without field verification.
Service Item Id: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: Owner: City of Savannah, Water Resources Planning and Engineering Point of contact: Civil Engineer, Water Resources Planning and Engineering, Shawn Rosenquist, 912-525-3100 EXT 2511, Shawn.Rosenquist@Savannahga.gov Data Custodian: Stormwater Management Division, GIS Analyst, Maureen Spiessl, 912-525-3100 EXT 2546, maureen.spiessl@savannahga.gov
Description: This layer is Vernon River Watershed in Savannah, Georgia. Boundary delineated by Shawn Rosenquist of the City of Savannah via modeling. Vernon River Watershed Management Plan, Savannah, Georgia 2022 https://www.ogeecheeriverkeeper.org/wp-content/uploads/2023/07/Revised-WMP-Vernon-River-2023.pdf THIS LAYER IS EDITED REGULARLY. IT IS AVAILABLE TO THE PUBLIC UPON REQUEST OF THE DATA OWNER/EDITOR. NOT INTENDED FOR REPLICATION ON THE SAGIS DATA WEBSITE. Disclaimer: The city of Savannah neither certifies nor claims that the information shown on the dataset represents the existing site conditions. The information on the dataset shall not be used without field verification.
Service Item Id: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: Owner: City of Savannah, Water Resources Planning and Engineering Point of contact: Civil Engineer, Water Resources Planning and Engineering, Shawn Rosenquist, 912-525-3100 EXT 2511, Shawn.Rosenquist@Savannahga.gov Data Custodian: Stormwater Management Division, GIS Analyst, Maureen Spiessl, 912-525-3100 EXT 2546, maureen.spiessl@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 Basin 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: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: OWNER: CITY OF SAVANNAH - STORMWATER DEPARTMENT.
STORMWATER DEPARTMENT DIRECTOR - ZACK HOFFMAN PH. (912) 650-7855 ext. 1938 zhoffman@savannahga.gov
ARCGIS DATA CUSTODIAN: BARRIE WILKINS PH. (912) 650-7855 ext. 2859 bwilkins@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: BARRIE WILKINS PH. (912) 650-7855 ext. 2859 bwilkins@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: MO SPIESSL PH. (912) 650-7855 ext. 2546 maureen.spiessl@savannahga.gov
Color: [0, 0, 0, 255] Background Color: N/A Outline Color: N/A Vertical Alignment: bottom Horizontal Alignment: left Right to Left: false Angle: 0 XOffset: 0 YOffset: 0 Size: 10 Font Family: Arial Font Style: normal Font Weight: normal Font Decoration: none
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 Basin 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: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: OWNER: CITY OF SAVANNAH - STORMWATER DEPARTMENT.
STORMWATER DEPARTMENT DIRECTOR - ZACK HOFFMAN PH. (912) 650-7855 ext. 1938 zhoffman@savannahga.gov
ARCGIS DATA CUSTODIAN: BARRIE WILKINS PH. (912) 650-7855 ext. 2859 bwilkins@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: BARRIE WILKINS PH. (912) 650-7855 ext. 2859 bwilkins@savannahga.gov
ARCGIS EDITOR FOR THIS LAYER: MO SPIESSL PH. (912) 650-7855 ext. 2546 maureen.spiessl@savannahga.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: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: U.S. Geological Survey (USGS), USGS National Geospatial Technical Operations Center
Color: [0, 92, 230, 255] Background Color: N/A Outline Color: N/A Vertical Alignment: bottom Horizontal Alignment: left Right to Left: false Angle: 0 XOffset: 0 YOffset: 0 Size: 10 Font Family: Arial Font Style: normal Font Weight: normal Font Decoration: none
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: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: U.S. Geological Survey (USGS), USGS National Geospatial Technical Operations Center
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: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: U.S. Geological Survey (USGS), USGS National Geospatial Technical Operations Center
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Description: This data set represents the extent, approximate location and type of wetlands and deepwater habitats in the United States and its Territories. These data delineate the areal extent of wetlands and surface waters as defined by Cowardin et al. (1979). The National Wetlands Inventory - Version 2, Surface Waters and Wetlands Inventory was derived by retaining the wetland and deepwater polygons that compose the NWI digital wetlands spatial data layer and reintroducing any linear wetland or surface water features that were orphaned from the original NWI hard copy maps by converting them to narrow polygonal features. Additionally, the data are supplemented with hydrography data, buffered to become polygonal features, as a secondary source for any single-line stream features not mapped by the NWI and to complete segmented connections. Wetland mapping conducted in WA, OR, CA, NV and ID after 2012 and most other projects mapped after 2015 were mapped to include all surface water features and are not derived data. The linear hydrography dataset used to derive Version 2 was the U.S. Geological Survey's National Hydrography Dataset (NHD). Specific information on the NHD version used to derive Version 2 and where Version 2 was mapped can be found in the 'comments' field of the Wetlands_Project_Metadata feature class. Certain wetland habitats are excluded from the National mapping program because of the limitations of aerial imagery as the primary data source used to detect wetlands. These habitats include seagrasses or submerged aquatic vegetation that are found in the intertidal and subtidal zones of estuaries and near shore coastal waters. Some deepwater reef communities (coral or tuberficid worm reefs) have also been excluded from the inventory. These habitats, because of their depth, go undetected by aerial imagery. By policy, the Service also excludes certain types of "farmed wetlands" as may be defined by the Food Security Act or that do not coincide with the Cowardin et al. definition. Contact the Service's Regional Wetland Coordinator for additional information on what types of farmed wetlands are included on wetland maps. This dataset should be used in conjunction with the Wetlands_Project_Metadata layer, which contains project specific wetlands mapping procedures and information on dates, scales and emulsion of imagery used to map the wetlands within specific project boundaries.
Service Item Id: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: U.S. Fish and Wildlife Service (FWS)
National Wetland Inventory (NWI)
608-238-9334
wetlandsteam@fws.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: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: U.S. Geological Survey (USGS), USGS National Geospatial Technical Operations Center
Description: The National Hydrography Dataset (NHD) includes the water drainage network of the United States. The data provides information about naturally occurring and constructed bodies of surface water (lakes, ponds, and reservoirs), paths through which water flows (canals, ditches, streams, and rivers), and related entities such as point features (springs, wells, stream gages, and dams). The Georgia dataset was published March 26th, 2021. The NHD was edited to display marsh data for Chatham County. The original shapefile can be viewed and downloaded at The National Map (TNM). For more information, please visit National Hydrography Dataset.
Service Item Id: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: U.S. Geological Survey (USGS), USGS National Geospatial Technical Operations Center
Description: The Web Soil Survey (WSS) provides soil data and information produced by the National Cooperative Soil Survey (NCSS). The NCSS investigates, inventory, classifies, and publish information about soils. It is operated by the USDA Natural Resource Conservation Service (NRCS). The WSS offers soil data for various geographies. The data was updated June 12th, 2020. The WSS was edited to display data for Chatham County. The WSS can be viewed at Web Soil Survey. For more information, please visit Web Soil Survey.
Service Item Id: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: National Cooperative Soil Survey (NCSS), Natural Resource Conservation Service (NRCS), U.S. Department of Agriculture (USDA)
Description: This report presents the results of the USGS Mineral Resources Program activity to compile a national-scale geologic map database to support national and regional level projects, including mineral resource and geoenvironmental assessments. The only comprehensive sources of regional- and national-scale geologic maps are state geologic maps with scales ranging from 1:100,000 to 1:1,000,000. Digital versions of these state maps form the core of what is presented here. Because no adequate geologic map exists for the state of Alaska, it is being compiled in regional blocks that also form part of this national database. It is expected that this series will completed by approximately the end of 2007. These maps and databases are being released in blocks of states or, in the case of Alaska, as compiled blocks of 1:250,000-scale quadrangles as chapters in this series. For Alaska, formal maps as well as databases are being published here, whereas for the conterminous U.S. only state databases and preview graphics are presented, because published maps for most states already exist. For Alaska these regional compilations will form the base for compiling a new geologic map of the state. As documented in Chapter A, standards for the conterminous U.S. are somewhat different than those for Alaska and Hawaii.
Service Item Id: 9a1821fde7f94f04abf5f733bfdf9957
Copyright Text: U.S. Geologic Survey (USGS)
Mineral Resources Program (MRP)
703-648-6344
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