King County GIS Center
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Suite 706
Seattle, WA 98104

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- 122.33136 W

+ 47°  35' 56.72"
- 122° 19' 52.90"


FEMA Floodways in King County

Description | Contacts | Attribute Information | Constraints

Data layer thumbnail image


Layer name:
Subject category:
Title: FEMA Floodways in King County
Feature Count: 127
Feature Type: Polygon
Abstract: A compilation of best available floodway boundaries. A floodway is the channel of a stream plus any adjacent floodplain area that must be kept free of encroachment so that the 1 percent annual chance flood can be carried without substantial increases in flood heights.
Purpose: This dataset provides the location of the regulatory floodways. This information is intended for informational purposes only, and should not be used for parcel level determinations
Status: Complete
Updated: As needed
Time period of content: (single date,as YYYYMMDD):: 20220926
Time period of content: (date range, as YYYYMMDD):: -
Spatial reference: WA State Plane North
FGDC Documentation: Classic or FAQ
Open Data Availability: Unknown
Theme Keywords: Floodplain, Flood, FEMA, Hydro, Rivers, Environment, Hazard, environment,
Lineage: Available


Maintained by:

Primary: , ,
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Secondary: KCGIS Center; This mailbox is monitored during business hours.

Attribute Information

_FLD_AR_ID_Primary key for table lookup. Assigned by table creator
_FLD_ZONE_Flood Zone. This is a flood zone designation. These zones are used by FEMA to designate the SFHAs and for insurance rating purposes. Acceptable values for this field are listed in the D_Zone table.
_SFHA_TF_Special Flood Hazard Area. If the area is within a SFHA this field would be true. This field will be true for any area coded as an A or V flood zone area. It should be false for any X or D flood areas. Acceptable values for this field are listed in the D_TrueFalse table.
_SOURCE_CIT_Source Citation. Abbreviation used in the metadata file when describing the source information for the feature. The abbreviation must match a value in L_Source_Cit.


Access: Access Constraint: Data is available on GIS Data Portal

Use: Distribution Liability: King County disclaims any warranty of use of any digital product or data beyond that for which it was designed.