Layer: CMZ_Erosion_Hazard_Area

View In: Map Viewer

Name: CMZ_Erosion_Hazard_Area_High

Display Field: River_Name

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This study provides Oregon communities with new information about the natural hazards from channel migration. During 2023 and 2024, the Oregon Department of Geology and Mineral Industries (DOGAMI) produced channel migration zone maps for the Zigzag River in Clackamas County. This polygon represents the high erosion hazard area (EHA). It includes the areas with the highest potential to be occupied by the channel due to lateral migration and channel widening during the next 30 years, i.e., 2022-2052, based on median historical erosion rates.

Copyright Text: This project was funded by a U.S. Federal Emergency Management Agency Cooperating Technical Partnership grant.

Min. Scale: 0

Max. Scale: 0

Default Visibility: true

Max Record Count: 2000

Supported query Formats: JSON, geoJSON, PBF

Use Standardized Queries: True

Extent:

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:

Global ID Field:

Type ID Field:

Fields:

OBJECTID (type: esriFieldTypeOID, alias: OBJECTID, SQL Type: sqlTypeOther, length: 0, nullable: false, editable: false)
Source (type: esriFieldTypeString, alias: Source, SQL Type: sqlTypeOther, length: 100, nullable: true, editable: true)
River_Name (type: esriFieldTypeString, alias: River_Name, SQL Type: sqlTypeOther, length: 100, nullable: true, editable: true)
Link (type: esriFieldTypeString, alias: Link, SQL Type: sqlTypeOther, length: 100, 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:

Is Data Versioned: false

Has Contingent Values: false

Supports Rollback On Failure Parameter: true

Last Edit Date: 1/22/2026 12:27:21 AM

Schema Last Edit Date: 1/22/2026 12:27:21 AM

Data Last Edit Date: 1/22/2026 12:27:21 AM

Supported Operations: Query Query Pivot Query Top Features Query Analytic Query Bins Generate Renderer Validate SQL Get Estimates ConvertFormat

Layer: CMZ_Erosion_Hazard_Area_High (ID:5)