Layers:

Layer: Potential Sump Conditions (0)


Name: Potential Sump Conditions

Display Field: CATEGORY

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description:

The Potential Sump Conditions layer is the result of analysis performed on the 2018 Light Detection and Ranging (LiDAR) derived, Bare Earth Digital Elevation Model (DEM) and LAS Dataset. Please see the Data Capture Methodology section of this document for detailed information on how this dataset was created. This dataset is intended for internal use to aid in the following use cases:

• Tool to assess existing site conditions when responding to service requests for structural, yard and road flooding.

• Tool to assess existing site conditions and potential impact of localized change in topography during redevelopment on adjacent properties if in sumps.

• Tool to assess potential impact of overwhelmed stormwater inlets in sumps on adjacent structures due to ponding of stormwater runoff.

• In concert with other spatial and field information, tool to prioritize sump conditions where structures may potentially be impacted based on depth of ponding, overland drainage area, and elevation of ground-level openings in structure.

• Tool to determine topographic features of the sump area including inflows, outflow, and extents.

• Ensure that proposed elevations of entry points into redeveloped structures (ie. areaways, walk-in basements, window wells) are adequately protected or situated away from the sumps if part of the redeveloped property is in a sump.

Contact: Land Development Services

Data Accessibility: Publicly Available

Update Frequency: As Needed

Last Revision Date: 12/15/2020

Creation Date: 12/15/2020

Layer Name: LDSAMGR.POTENTIAL_SUMP_CONDITIONS



Copyright Text: Fairfax County, Virginia; Land Development Services

Min. Scale: 24000

Max. Scale: 0

Default Visibility: false

Max Record Count: 2000

Supported query Formats: JSON, geoJSON, PBF

Use Standardized Queries: True

Extent:

XMin: 11758275.7250199
YMin: 6911060.87258446
XMax: 11898884.9749688
YMax: 7068099.48960896
Spatial Reference: 102746 (2283)


Drawing Info:

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HasZ: false

HasM: false

Has Attachments: false

Has Geometry Properties: true

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Object ID Field: OBJECTID

Unique ID Field:

Name : OBJECTID

IsSystemMaintained : True


Global ID Field: GLOBALID

Type ID Field:

Fields:
• OBJECTID (type: esriFieldTypeOID, alias: OBJECTID, SQL Type: sqlTypeOther, length: 0, nullable: false, editable: false)
• CATEGORY (type: esriFieldTypeString, alias: Category:, SQL Type: sqlTypeOther, length: 100, nullable: true, editable: true, Coded Values: [Intersects with Inlets: Intersects with Inlets], [Intersects with Manholes: Intersects with Manholes], [Intersects with Roads: Intersects with Roads], ... 7 more ...)
• SUMP_AREA (type: esriFieldTypeDouble, alias: Sump area 2D (sqft):, SQL Type: sqlTypeOther, nullable: true, editable: true)
• GLOBALID (type: esriFieldTypeGlobalID, alias: GLOBALID, SQL Type: sqlTypeOther, length: 38, nullable: false, editable: false)
• CREATED_USER (type: esriFieldTypeString, alias: CREATED_USER, SQL Type: sqlTypeOther, length: 255, nullable: true, editable: true)
• CREATED_DATE (type: esriFieldTypeDate, alias: CREATED_DATE, SQL Type: sqlTypeOther, length: 8, nullable: true, editable: true)
• LAST_EDITED_USER (type: esriFieldTypeString, alias: LAST_EDITED_USER, SQL Type: sqlTypeOther, length: 255, nullable: true, editable: true)
• LAST_EDITED_DATE (type: esriFieldTypeDate, alias: LAST_EDITED_DATE, SQL Type: sqlTypeOther, length: 8, nullable: true, editable: true)
• SUMP_SURFACE_AREA (type: esriFieldTypeDouble, alias: Surface area 3D (sq ft):, SQL Type: sqlTypeOther, nullable: true, editable: true)
• MAX_ELEVATION (type: esriFieldTypeDouble, alias: Maximum elevation (ft):, SQL Type: sqlTypeOther, nullable: true, editable: true)
• MIN_ELEVATION (type: esriFieldTypeDouble, alias: Minimum elevation (ft):, SQL Type: sqlTypeOther, nullable: true, editable: true)
• SUMP_DEPTH (type: esriFieldTypeDouble, alias: Maximum sump depth (ft):, SQL Type: sqlTypeOther, nullable: true, editable: true)
• SUMP_VOLUME (type: esriFieldTypeDouble, alias: Sump volume (cu ft):, SQL Type: sqlTypeOther, nullable: true, editable: true)
• OVERLAND_RELIEF_DRAINAGE_AREA (type: esriFieldTypeDouble, alias: Overland relief drainage area (ac):, SQL Type: sqlTypeOther, nullable: true, editable: true)
• COMMENT (type: esriFieldTypeString, alias: Comment:, SQL Type: sqlTypeOther, length: 255, nullable: true, editable: true)
• Shape__Area (type: esriFieldTypeDouble, alias: Shape__Area, SQL Type: sqlTypeDouble, nullable: true, editable: false)
• Shape__Length (type: esriFieldTypeDouble, alias: Shape__Length, SQL Type: sqlTypeDouble, nullable: true, editable: false)

Templates:

Name: PotentialSumpConditions
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:


Is Data Versioned: false

Has Contingent Values: false

Supports Rollback On Failure Parameter: true

Last Edit Date: 2/1/2025 7:48:39 AM

Schema Last Edit Date: 2/1/2025 7:48:39 AM

Data Last Edit Date: 2/1/2025 7:48:34 AM