Metadata: FEMA Biological Opinion Impact Areas

FEMA Biological Opinion Impact Areas

Category Hydro
Feature Dataset Name STAND-ALONE
Item Name FEMA_BIOP_AREAS_PDX
Database Type
Originator City of Portland
Bureau Bureau of Planning and Sustainability
Publication Date
Abstract Potential areas impacted by FEMA's Biological Opinion (BioP) related to streams with salmonid habitat. This is an interim mapping established by RPA 2 and does not represent the full scope of area impacted by the Biological Opinion.
Purpose For determining the potential impact of the FEMA BioP.
Supplemental Information
Last Dataset Update 10/19/2016 14:49
Last Source Update 07/14/2016 14:58
Maintenance/Update Frequency As needed
Extent City of Portland
Data Type
Shape Type Polygon
Feature Count 30
Horizontal Position Accuracy
Horizontal Position Accuracy Link
Progress
North Bounding Coordinate 732248.04245358
South Bounding Coordinate 651145.151043892
East Bounding Coordinate 7696240.23148103
West Bounding Coordinate 7612278.54676406
Theme Keyword(s) floodplain, fema, biological opinion, salmonid, streams
Theme Keyword Thesaurus
Place Keyword(s)
Place Keyword Thesaurus
Access Constraints CGIS Do not distribute without Bureau Approval
Use Constraints After permission is granted by responsible bureau, these data are distributed under the terms of the City of Portland Data Distribution Policy. Care was taken in the creation of this data but it is provided "as is".

The City of Portland cannot accept any responsibility for errors, omissions, or positional accuracy.
Source Dataset Type File Geodatabase
Output Geodatabase EGH_Public
Distribution Grid: State plane coordinate system 1983(91).
Units: International feet
Datum: North American Datum of 1983/1991 (HPGN)
Liability: The City of Portland has placed restrictions on the distribution of this data due to security concerns. Access requests will be considered on a case-by-case basis. The information in this file was derived from digital databases on the City of Portland GIS. Care was taken in the creation of this file. The City cannot accept any responsibility for errors, omissions, or positional accuracy. There are no warranties, expressed or implied.
Format: Shapefile or File Geodatabase Feature Class - Data will be provided via City of Portland FTP Site.
Online Resource: http://portlandmaps.com/opendata
Online Instructions: City of Portland Public/Open Data is distributed via the PortlandMaps Open Data Site - http://portlandmaps.com/opendata. Data not available on the PortlandMaps Open Data site can be requested by contacting the City of Portland CGIS Group - maps@portlandoregon.gov
Transfer Size: varies
SPCS Zone Identifier: 5076
Contact(s)
Add
Kevin Martin
503 823-7710
503 823-7800
kevin.martin@portlandoregon.gov
1900 SW 4th Avenue, Suite #7100
Portland, OR 97201

City of Portland - BPS
503 823-7700
503 823-7800
bps@portlandoregon.gov
File(s)
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Lineage
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07/01/2016 BioP mapping methodology
1.    Stream selection:
a.    Select all stream within DSL Essential Salmonid Habitat (ESH) layer (including lower Columbia Slough up to 18th St)
b.    Add all tributaries of ESH streams within the 100-year floodplain (SFHA)
2.    Union the following to create a proxy "Ordinary High Water" layer:
a.    Ordinary High Water layer
b.    Columbia Slough Waterbody
c.    15' buffer of Johnson Creek/Crystal Springs
d.    5' buffer of Tryon Creek/Crystal/all ESH tributary streams in the SFHA
3.    Buffer resulting proxy "Ordinary High Water" layer by 170'

4.    Floodplain mapping
a.    Dissolve fema flood hazard data on 100-year floodplain (SFHA)
b.    Limit FEMA SFHA polys to areas around to ESH streams and tributaries of ESH  (note that the Columbia Slough is treated differently)
5.    “Identity” resulting 100-year floodplain (SFHA) and BioP proxy "ordinary high water" buffer

6.    Add “BioP_Class” field to result and populate:
a.    1 = SFHA within the 170’ OHW buffer
b.    2 = SFHA outside 170’ OHW buffer

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Attribute Tables & Domains

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fema_biop_areas_pdx
Table Description
Table Jurisdiction
Column Sort Column Name Column Alias Column Type Column Size Domain Value(s) Column Description
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1 SFHA SFHA String 5
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X
"True" indicates areas within the Special Flood Hazard Area (aka the 100-year floodplain)
1 OHW_Buffer OHW_Buffer String 5
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X
"True" indicates areas within 170' of estimated ordinary high water (see lineage for an explanation of the OHW mapping)
1 BioP_Class BioP_Class Integer 2
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SFHA within the 170' OHW buffer Special Flood Hazard Area (SFHA) within 170' of ordinary high water (OHW). See lineaege for a description of the OHW mapping. SFHA is also known as the "100-year floodplain".
X
SFHA outside 170' OHW buffer Special Flood Hazard Area (SFHA) not within 170' of ordinary high water (OHW). See lineaege for a description of the OHW mapping. SFHA is also known as the "100-year floodplain".
X
X
The Biological Opionion Impact area classification