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303(d) Listing Methodology / Policy 10-1

listing methodology picture
Image courtesy of Eric Scott
City of Westminster

The 303(d) Listing Methodology provides a framework for the determination of attainment or non-attainment of assigned water quality standards and designated uses. Generally, the division’s recommendation to list or not list a waterbody will be based upon stringent application of the listing methodology criteria.

The 303(d) Listing Methodology workgroup reviews and updates this document on a biennial basis in anticipation of 303(d) List and M&E List development. The listing methodology is revisited and revised with the intent of clarifying the division’s procedures for assessing attainment of those uses and standards assigned by the commission to Colorado waters. Most often revisions or additions to the listing methodology derive from issues raised during the previous listing process.

If you are interested in joining the discussion or simply want to receive information on the 303(d) Listing Methodology workgroup, use the Workgroup Signup Form at the bottom of this page. Upon signing up, you will receive details about meetings, handouts, and other related information. Your information will not be shared; you can manage your subscription preferences by following the link at the bottom of every email you receive.

In order to get a better handle on placement of documents and improve searchability, membership is requested to use the document naming convention explained in the document naming conventions guideline. If the submission does not follow the convention, the work group Coordator will be responsible for renaming the document before sending the file(s) to be posted. All files must be saved as a *.pdf before sending it to the web contact for posting.

 

Reference Documents

2016 303(d) Listing Methodology

Policy 10-1

Co-Coordinators

Caroline Byus

303-455-9589

Sarah Wheeler

303-692-3436

2017

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Policy 10-1

Overview

listing methodology picture
Image courtesy of Eric Scott
City of Westminster

The Aquatic Life Policy 10-1 Technical Advisory Committee (TAC) is a sub-group formed out of the 303(d) Listing Methodology workgroup to identify, partition and resolve issues surrounding Policy 10-1 and its implementation into the Listing Methodology and 303(d) listing cycle. These actions will inform which policy issues are ripe for Listing Methodology consideration versus those issues/changes that could potentially be incorporated directly into re-calibrating the multi-metric indices (MMI) and recalculating the biological thresholds and auxiliary metrics.

Participation in the TAC is by invitation only and is presently full. The TAC sub-group is equally represented by scientific professionals from several regulatory agencies, environmental consultants and academia. If you are interested in receiving information on the Policy 10-1 TAC, use the Workgroup Sign Up button, located at the bottom of this page and on the Home page. The completed form will be forwarded to the subcommittee Coordinators. The form can also be used to remove yourself from a workgroup.

In order to get a better handle on placement of documents and improve searchability, membership is requested to use the document naming convention explained in the document naming conventions guideline. If the submission does not follow the convention, the work group Coordator will be responsible for renaming the document before sending the file(s) to be posted. All files must be saved as a *.pdf before sending it to the web contact for posting.

Reference Documents

Policy 10-1

Workgroup Officials

Co-Coordinators

Caroline Byus

303-455-9589

Chris Theel

303-692-3558

Meeting Dates

2017

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