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Knotweed Control in the Cedar River Watershed, WA State: 2010-2023.

General Information
Data Package:
Local Identifier:cos-spu.11.1
Title:Knotweed Control in the Cedar River Watershed, WA State: 2010-2023.
Alternate Identifier:DOI PLACE HOLDER
Abstract:

The Cedar River Watershed provides drinking water to Seattle and the forest surrounding the drinking water reservoir is closed to public access and managed for invasive species. In 1999, the invasive plant knotweed was detected in the watershed and control was limited to manual and mechanical methods due to an herbicide moratorium intended to prevent broadcast spraying of roadside vegetation. These methods were largely unsuccessful and impractical for controlling acres of knotweed growing in remote locations of the watershed. In 2010, Seattle Public Utilities passed the first ordinance through Seattle City Council to approve the limited use of imazapyr to control knotweed in the watershed for three years. There have been five successive knotweed ordinances passed, allowing for herbicide control of knotweed in the watershed from 2010-2025. The reports included in this package are provided to Seattle City Council annually as a requirement of the ordinance. The data table provides the control history since the passage of the first ordinance and includes information about patch size and amount of imazapyr used.

Publication Date:2024-02-14
For more information:
Visit: DOI PLACE HOLDER

Time Period
Begin:
2010
End:
2023

People and Organizations
Contact:Loutos, Zoe (Seattle Public Utilities, Restoration Ecologist) [  email ]
Creator:Loutos, Zoe (Seattle Public Utilities, Restoration Ecologist)
Associate:Nickelson, Sally (Seattle Public Utilities, Project Originator and former Project Manager)
Associate:Munger, Julia (Seattle Public Utilities, Botanist, Former Project Manager)
Associate:Loutos, Zoe (Seattle Public Utilities, Restoration Ecologist, Project Manager)

Data Entities
Data Table Name:
Knotweed_Control_CRW
Description:
Summary of efforts to control knotweed with imazapyr in the Cedar River Watershed, WA State. Includes quantities of imazapyr and acres treated at each site per year.
Other Name:
2010_KnotweedReport_Council
Description:
Summary report detailing treatment methods, timeline, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment.
Other Name:
2011_KnotweedReport_Council
Description:
Summary report detailing treatment methods, timeline, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment.
Other Name:
2012_KnotweedReport_Council
Description:
Summary report detailing treatment methods, timeline, costs, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment and site restoration.
Other Name:
2013_KnotweedReport_Council
Description:
Summary report detailing treatment methods, timeline, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment and site restoration.
Other Name:
2014_KnotweedReport_Council
Description:
Summary report detailing treatment methods, timeline, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment and site restoration.
Other Name:
2015_KnotweedReport_Council
Description:
Summary report detailing treatment methods, timeline, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment and site restoration. Includes appendices on risk assessment and literature review of treating knotweed with imazapyr and photos of knotweed treatment results.
Other Name:
2016_KnotweedReport_Council
Description:
Summary report detailing treatment methods, timeline, costs, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment and site restoration. Includes appendix with photos of knotweed treatment results.
Other Name:
2017_KnotweedReport_Council
Description:
Summary report detailing treatment methods, timeline, costs, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment and site restoration. Includes appendix with photos of knotweed treatment results.
Other Name:
2018_KnotweedReport_Council
Description:
Summary report detailing drivers for control, treatment methods, timeline, costs, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment. Includes appendices on risk analysis and literature review of treating knotweed with imazapyr and photos of knotweed treatment results and site restoration projects.
Other Name:
2019_KnotweedReport_Council
Description:
Summary report detailing drivers for control, treatment methods, timeline, costs, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment. Includes appendices on risk analysis and literature review of treating knotweed with imazapyr and photos of knotweed treatment results and site restoration projects.
Other Name:
2020_KnotweedReport_Council
Description:
Summary report detailing drivers for control, treatment methods, timeline, costs, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment. Includes appendices on risk analysis and literature review of treating knotweed with imazapyr and photos of knotweed treatment results and site restoration projects.
Other Name:
2021_KnotweedReport_Council
Description:
Summary report detailing drivers for control, treatment methods, timeline, costs, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment. Includes appendices on risk analysis and literature review of treating knotweed with imazapyr and photos of knotweed treatment results and site restoration projects.
Detailed Metadata

Data Entities

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/cos-spu/11/1/a9040207b24ec6fac2db13a083bba3bc
Name:Knotweed_Control_CRW
Description:Summary of efforts to control knotweed with imazapyr in the Cedar River Watershed, WA State. Includes quantities of imazapyr and acres treated at each site per year.
Number of Records:154
Number of Columns:7

Table Structure
Object Name:Knotweed_Control_CRW.csv
Size:5188 byte
Authentication:c747da4d94d695d575dcebd68a00b2c6 Calculated By MD5
Text Format:
Number of Header Lines:1
Record Delimiter:\r\n
Orientation:column
Simple Delimited:
Field Delimiter:,
Quote Character:"

Table Column Descriptions
 Hydrographic BoundarySiteYearProduct Used mlProduct Used ozArea Treated sqftArea Treated acres
Column Name:Hydrographic Boundary  
Site  
Year  
Product Used ml  
Product Used oz  
Area Treated sqft  
Area Treated acres  
Definition:The Cedar River Watershed's hydrographic boundary. All land that drains to the Chester Morse Lake and the Cedar River and its tributaries, which serve as the drinking water source for the City of Seattle and nearby municipalities.Category of site where knotweed was controlled.Year knotweed was controlled.Amount of imazapyr used in milliliters. This is the amount of imazapyr used only and does not reflect any amount of water added to herbicide mixture. Herbicide mixture is mixed with water at 1% concentration of imazapyr before application..Amount of imazapyr used in ounces. This is the amount of imazapyr used only and does not reflect any amount of water added to herbicide mixture. Herbicide mixture is mixed with water at 1% concentration of imazapyr before application..The size of the site controlled for knotweed, in terms of square feet. Does not reflect patch density or percent cover.The size of the site controlled for knotweed, in terms of acres. Does not reflect patch density or percent cover.
Storage Type:string  
string  
dateTime  
float  
float  
float  
float  
Measurement Type:nominalnominaldateTimeratioratioratioratio
Measurement Values Domain:
Allowed Values and Definitions
Enumerated Domain 
Code Definition
CodeIn
Definitioninside the hydrographic boundary
Source
Code Definition
CodeOut
Definitionoutside the hydrographic boundary
Source
Allowed Values and Definitions
Enumerated Domain 
Code Definition
CodeBorder Roads
DefinitionPatches found along road systems outside the municipal hydrographic boundary,
Source
Code Definition
CodeCedar Falls IN
DefinitionPatches around Cedar Falls campus within municipal hydrographic boundary.
Source
Code Definition
CodeCedar Falls OUT
DefinitionPatches around Cedar Falls campus outside municipal hydrographic boundary.
Source
Code Definition
CodeCedar River
DefinitionPatches in the riparian habitat of the Cedar River.
Source
Code Definition
CodeEducation Center
DefinitionPatches in planting sites and along the lakeshore trail near the Cedar River Watershed's Education Center.
Source
Code Definition
CodeMasonry Dam
DefinitionPatches adjacent to Masonry Dam and road system adjacent to penstocks and dam infrastructure.
Source
Code Definition
CodeRattlesnake Lake
DefinitionPatches in riparian habitat along Rattlesnake Lake and forested recreation areas.
Source
Code Definition
CodeRoad Patches
DefinitionPatches along road systems within the municipal hydrographic boundary.
Source
Code Definition
CodeRock Creek complex
DefinitionPatches in riparian habitat of Rock Creek and within Rock Creek wetland complex.
Source
Code Definition
CodeTaylor
DefinitionPatches in Taylor Townsite and along Taylor Ditch.
Source
Code Definition
CodeWalsh Lake
DefinitionPatches found in riparian habitat near Walsh Lake and Walsh Creek.
Source
FormatYYYY
Precision
Unitmilliliter
Typereal
Unitounce
Typereal
UnitfootSquared
Typereal
Unitacre
Typereal
Missing Value Code:              
Accuracy Report:              
Accuracy Assessment:              
Coverage:              
Methods:              

Non-Categorized Data Resource

Name:2010_KnotweedReport_Council
Entity Type:application/pdf
Description:Summary report detailing treatment methods, timeline, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment.
Physical Structure Description:
Object Name:2010_KnotweedReport_Council.pdf
Size:596633 byte
Authentication:8bc16a429ae6e0da5df5249c601c5679 Calculated By MD5
Externally Defined Format:
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Non-Categorized Data Resource

Name:2011_KnotweedReport_Council
Entity Type:application/pdf
Description:Summary report detailing treatment methods, timeline, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment.
Physical Structure Description:
Object Name:2011_KnotweedReport_Council.pdf
Size:742484 byte
Authentication:d36402a11732ee4c6e1f4516539e56fb Calculated By MD5
Externally Defined Format:
Format Name:application/pdf
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Non-Categorized Data Resource

Name:2012_KnotweedReport_Council
Entity Type:application/pdf
Description:Summary report detailing treatment methods, timeline, costs, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment and site restoration.
Physical Structure Description:
Object Name:2012_KnotweedReport_Council.pdf
Size:1391367 byte
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Non-Categorized Data Resource

Name:2013_KnotweedReport_Council
Entity Type:application/pdf
Description:Summary report detailing treatment methods, timeline, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment and site restoration.
Physical Structure Description:
Object Name:2013_KnotweedReport_Council.pdf
Size:1370197 byte
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Externally Defined Format:
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Non-Categorized Data Resource

Name:2014_KnotweedReport_Council
Entity Type:application/pdf
Description:Summary report detailing treatment methods, timeline, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment and site restoration.
Physical Structure Description:
Object Name:2014_KnotweedReport_Council.pdf
Size:1130017 byte
Authentication:61b0c5a3a94c2519ef4bd5dfc832c3c7 Calculated By MD5
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Non-Categorized Data Resource

Name:2015_KnotweedReport_Council
Entity Type:application/pdf
Description:Summary report detailing treatment methods, timeline, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment and site restoration. Includes appendices on risk assessment and literature review of treating knotweed with imazapyr and photos of knotweed treatment results.
Physical Structure Description:
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Non-Categorized Data Resource

Name:2016_KnotweedReport_Council
Entity Type:application/pdf
Description:Summary report detailing treatment methods, timeline, costs, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment and site restoration. Includes appendix with photos of knotweed treatment results.
Physical Structure Description:
Object Name:2016_KnotweedReport_Council.pdf
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Non-Categorized Data Resource

Name:2017_KnotweedReport_Council
Entity Type:application/pdf
Description:Summary report detailing treatment methods, timeline, costs, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment and site restoration. Includes appendix with photos of knotweed treatment results.
Physical Structure Description:
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Non-Categorized Data Resource

Name:2018_KnotweedReport_Council
Entity Type:application/pdf
Description:Summary report detailing drivers for control, treatment methods, timeline, costs, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment. Includes appendices on risk analysis and literature review of treating knotweed with imazapyr and photos of knotweed treatment results and site restoration projects.
Physical Structure Description:
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Non-Categorized Data Resource

Name:2019_KnotweedReport_Council
Entity Type:application/pdf
Description:Summary report detailing drivers for control, treatment methods, timeline, costs, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment. Includes appendices on risk analysis and literature review of treating knotweed with imazapyr and photos of knotweed treatment results and site restoration projects.
Physical Structure Description:
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Non-Categorized Data Resource

Name:2020_KnotweedReport_Council
Entity Type:application/pdf
Description:Summary report detailing drivers for control, treatment methods, timeline, costs, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment. Includes appendices on risk analysis and literature review of treating knotweed with imazapyr and photos of knotweed treatment results and site restoration projects.
Physical Structure Description:
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Non-Categorized Data Resource

Name:2021_KnotweedReport_Council
Entity Type:application/pdf
Description:Summary report detailing drivers for control, treatment methods, timeline, costs, and locations, results from water quality sampling and treatment, and future plans for knotweed treatment. Includes appendices on risk analysis and literature review of treating knotweed with imazapyr and photos of knotweed treatment results and site restoration projects.
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Data:https://pasta-s.lternet.edu/package/data/eml/cos-spu/11/1/e472dabd0dbf541cc255addc7d790a74

Data Package Usage Rights

This data package is released to the "public domain" under Creative Commons CC0 1.0 "No Rights Reserved" (see: https://creativecommons.org/publicdomain/zero/1.0/). It is considered professional etiquette to provide attribution of the original work if this data package is shared in whole or by individual components. A generic citation is provided for this data package on the website https://portal.edirepository.org (herein "website") in the summary metadata page. Communication (and collaboration) with the creators of this data package is recommended to prevent duplicate research or publication. This data package (and its components) is made available "as is" and with no warranty of accuracy or fitness for use. The creators of this data package and the website shall not be liable for any damages resulting from misinterpretation or misuse of the data package or its components. Periodic updates of this data package may be available from the website. Thank you.

Keywords

By Thesaurus:
(No thesaurus)herbicide, imazapyr
LTER Controlled Vocabularyinvasive species, riparian
(No thesaurus)Watershed Invasives Program

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Methods and protocols used in the collection of this data package
Description:

Annual reports of knotweed control efforts in the Cedar River Watershed. The reports include data on acreage of knotweed controlled and amount of imazapyr used. Acreage was estimated using GPS points collected in the field and creating polygon shapefiles in GIS surrounding the mapped GPS points of knotweed. Amount of imazapyr used was totaled by measuring imazapyr with graduated cylinders in the field each time a new batch of herbicide was mixed.

People and Organizations

Publishers:
Organization:Environmental Data Initiative
Email Address:
info@edirepository.org
Web Address:
https://edirepository.org
Id:https://ror.org/0330j0z60
Creators:
Individual: Zoe Loutos
Organization:Seattle Public Utilities
Position:Restoration Ecologist
Email Address:
zoe.loutos@seattle.gov
Contacts:
Individual: Zoe Loutos
Organization:Seattle Public Utilities
Position:Restoration Ecologist
Email Address:
zoe.loutos@seattle.gov
Associated Parties:
Individual: Sally Nickelson
Organization:Seattle Public Utilities
Address:
United States
Role:Project Originator and former Project Manager
Individual: Julia Munger
Organization:Seattle Public Utilities
Position:Botanist
Address:
United States
Email Address:
julia.munger@seattle.gov
Role:Former Project Manager
Individual: Zoe Loutos
Organization:Seattle Public Utilities
Position:Restoration Ecologist
Address:
19901 Cedar Falls Rd SE,
North Bend, WA, Washington 98045 United States
Phone:
2066817967 (voice)
Email Address:
zoe.loutos@seattle.gov
Role:Project Manager
Metadata Providers:
Individual: Zoe Loutos
Organization:Seattle Public Utilities
Position:Restoration Ecologist
Email Address:
zoe.loutos@seattle.gov

Temporal, Geographic and Taxonomic Coverage

Temporal, Geographic and/or Taxonomic information that applies to all data in this dataset:

Time Period
Begin:
2010
End:
2023
Geographic Region:
Description:Cedar River Municipal Watershed, King County, Washington State
Bounding Coordinates:
Northern:  47.4534927Southern:  47.3726959
Western:  -121.9740232Eastern:  -121.7100748
Taxonomic Range:
Classification:
Rank Name:Kingdom
Rank Value:Viridiplantae
Common Name:green plants
Identifer:National Center for Biotechnology Information - Taxonomy (NCBI)
Info for ID: 33090 (Viridiplantae)
Classification:
Rank Name:Phylum
Rank Value:Streptophyta
Identifer:National Center for Biotechnology Information - Taxonomy (NCBI)
Info for ID: 35493 (Streptophyta)
Classification:
Rank Name:Subphylum
Rank Value:Streptophytina
Identifer:National Center for Biotechnology Information - Taxonomy (NCBI)
Info for ID: 131221 (Streptophytina)
Classification:
Rank Name:Class
Rank Value:Magnoliopsida
Common Name:flowering plants
Identifer:National Center for Biotechnology Information - Taxonomy (NCBI)
Info for ID: 3398 (Magnoliopsida)
Classification:
Rank Name:Order
Rank Value:Caryophyllales
Identifer:National Center for Biotechnology Information - Taxonomy (NCBI)
Info for ID: 3524 (Caryophyllales)
Classification:
Rank Name:Family
Rank Value:Polygonaceae
Common Name:buckwheat family
Identifer:National Center for Biotechnology Information - Taxonomy (NCBI)
Info for ID: 3615 (Polygonaceae)
Classification:
Rank Name:Subfamily
Rank Value:Polygonoideae
Identifer:National Center for Biotechnology Information - Taxonomy (NCBI)
Info for ID: 1110380 (Polygonoideae)
Classification:
Rank Name:Genus
Rank Value:Reynoutria
Identifer:National Center for Biotechnology Information - Taxonomy (NCBI)
Info for ID: 655516 (Reynoutria)
Classification:
Rank Name:Species
Rank Value:Reynoutria x bohemica
Identifer:National Center for Biotechnology Information - Taxonomy (NCBI)
Info for ID: 429719 (Reynoutria x bohemica)

Project

Parent Project Information:

Title:Watershed Invasives Program
Personnel:
Individual: Zoe Loutos
Role:project manager
Additional Award Information:
Funder:Seattle Public Utilities
Number:N000808
Title:Watershed Invasives Program

Maintenance

Maintenance:
Description:

There is ongoing data collection and this package will require annual updates with the current year's control summary.

Frequency:
Other Metadata

Additional Metadata

additionalMetadata
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Additional Metadata

additionalMetadata
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        |     |        \___attribute 'app' = 'ezEML'
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