King County GIS Center
King Street Center
201 S. Jackson St.
Suite 706
Seattle, WA 98104
giscenter@kingcounty.gov

+ 47.59909 N
- 122.33136 W

+ 47°  35' 56.72"
- 122° 19' 52.90"

 

100 Year Floodplain in King County

Description | Contacts | Attribute Information | Constraints

Data layer thumbnail image

Description

Layer name: FLDPLAIN_100YR
Subject category: hydro
Title: 100 Year Floodplain in King County
Feature Count: 502
Feature Type: Polygon
Abstract: 100 year floodplain are areas that will be inundated by the flood event having a 1-percent chance of being equaled or exceeded in any given year, derived from Preliminary FEMA Flood Insurance Rate Maps.
Purpose: Provides the location of the Preliminary FEMA 100-year floodplain. 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):: 20190524
Time period of content: (date range, as YYYYMMDD):: -
Spatial reference: WA State Plane North
FGDC Documentation: Classic or FAQ
Open Data Availability: Yes
Place Keywords: Pacific NW, King County, WA, Washington state,
Theme Keywords: hydro, floodplain, rivers, FEMA, flood, boundaries, environment,
Lineage: Not available
Supplemental Information: 100 year floodplain are areas that will be inundated by the flood event having a 1-percent chance of being equaled or exceeded in any given year, derived from Preliminary FEMA Flood Insurance Rate Maps.

Contacts

Maintained by:
King County DNRP, Water and Land Resources Division
Primary: Ken Zweig, Program Manager, 206-477-4732
(How to e-mail a County contact)
Secondary: KCGIS Center; giscenter@kingcounty.gov. This mailbox is monitored during business hours.

Attribute Information

ItemDescriptionDomain
_FLD_ZONE_Flood Zone Classifications
AAn area inundated by 1% annual chance flooding, for which no BFEs have been determined.
AEAn area inundated by 1% annual chance flooding, for which BFEs have been determined.
AHAn area inundated by 1% annual chance flooding (usually an area of ponding), for which BFEs have been determined; flood depths range from 1 to 3 feet.
AOAn area inundated by 1% annual chance flooding (usually sheet flow on sloping terrain), for which average depths have been determined; flood depths range from 1 to 3 feet.
OPEN WATEROpen Water
VEAn area inundated by 1% annual chance flooding with velocity hazard; (wave action); BFEs have been determined.
_FLOODPLAIN_Type of floodplain


Constraints

Access: Access Constraint: Data is available on GIS Data Portal: http://www5.kingcounty.gov/gisdataportal/Default.aspx

Use: Use Constraint: King County data are made available with the understanding that they shall be used exclusively by the obtainer or his/her authorized agents. Digital products may not be reproduced or redistributed in any form or by any means without the express written authorization of King County.